It's C that's correct.... (the are both magnetic north and south poles)
Earth is like a bar magnet, there are both magnetic north and south poles. Therefore, option (C) is correct.
Why does the earth behave like a bar magnet?A magnet can be defined as an object that has a north pole and south magnetic pole and a magnetic field. The idea that Earth is a magnet, was first proposed in 1600 by a British physician William Gilbert. He represented the earth as a magnet with help of a spherical magnet.
With a compass, the spherical magnet causes a compass needle to behave in a similar way that Earth causes a compass needle to behave. This indicated that a spherical magnet is a good model to represent that the Earth is a magnet.
Earth has north and south magnetic poles from which the North Pole is located at about 80° north latitude. The magnetic field is strongest at the poles, and magnetic field lines of magnetic force move from the north pole to the south magnetic pole.
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What is the specific heat of the metal?
cal/g.°C
Answer:
0.1648
Explanation:
The specific heat of a metal measures the amount of heat energy required to raise its temperature. It is measured in cal/g.°C and varies depending on the type of metal.
Explanation:The specific heat of a metal is a property that measures the amount of heat energy required to raise the temperature of a certain amount of the metal by a certain number of degrees Celsius. It is typically measured in units of cal/g.°C.
For example, let's say we have a metal with a specific heat of 0.5 cal/g.°C. This means that it takes 0.5 calories of heat energy to raise the temperature of 1 gram of the metal by 1 degree Celsius.
Specific heat can vary depending on the type of metal. Different metals have different atomic structures, which affect how they absorb and retain heat. Therefore, each metal has its own specific heat value.
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Using stoichiometry, determine the mass of powdered drink mix needed to make a 1.0 M solution of 100 mL from C12H22O11
Answer:
[tex]\boxed{\text{3.4 g}}[/tex]
Explanation:
Step 1. Calculate the moles of C₁₂H₂₂O₁₁
[tex]\text{n = 0.100 L} \times \dfrac{\text{1.0 mol}}{\text{1 L}}=\text{0.100 mol}[/tex]
Step 2. Calculate the mass of C₁₂H₂₂O₁₁
[tex]\text{m = 0.100 mol} \times \dfrac{\text{342.30 g}}{\text{1 mol}} = \text{3.4 g}\\\\\text{The mass of sucrose needed is }\boxed{\textbf{3.4 g}}[/tex]
Final answer:
To make a 100 mL of 1.0 M solution of C12H22O11, we need 34.23 grams of powdered drink mix, by first calculating the moles required (0.1 moles) and then using the molar mass (342.30 g/mol) to find the required mass.
Explanation:
To calculate the mass of powdered drink mix needed to make a 1.0 M solution of 100 mL using C12H22O11, we need to use stoichiometry. First, we should calculate the number of moles of C12H22O11 required for a 1.0 M solution. Since molarity is moles of solute per liter of solution, for 0.1 liters (100 mL) of a 1.0 M solution, 0.1 moles of solute is needed.
Next, we find the molar mass of C12H22O11, which is the sum of the atomic masses of each element multiplied by the number of each atom in the molecule:
12 carbon atoms (12 x 12.01 g/mol)22 hydrogen atoms (22 x 1.008 g/mol)11 oxygen atoms (11 x 16.00 g/mol)The molar mass for C12H22O11 will be approximately 342.30 g/mol. The mass of the powdered drink mix needed is calculated as mass = moles × molar mass, which is 0.1 moles × 342.30 g/mol, equaling 34.23 grams. Therefore, we need 34.23 grams of C12H22O11 to make a 100 mL of 1.0 M solution.
How many molecules are present in 385.55g of NO2?
Final answer:
There are approximately 5.045 x 10^24 molecules in 385.55g of NO2. This is calculated by first determining the number of moles in the given mass using its molar mass and then multiplying by Avogadro's number.
Explanation:
To calculate the number of molecules in 385.55g of NO2, we first need to determine the number of moles of NO2 in the given mass. The molar mass of nitrogen dioxide, NO2, is calculated as follows:
M(NO2) = 14 +(2)(16) = 46 g/mol
Then, we use the molar mass to convert grams to moles:
Number of moles of NO2 = mass (g) / molar mass (g/mol)
= 385.55g / 46 g/mol
= 8.381 mol of NO2
Afterward, we use Avogadro's number, which is 6.022 x 1023 molecules per mole, to find the total number of molecules:
Number of molecules = Number of moles × Avogadro's number
= 8.381 mol × 6.022 x 1023 molecules/mol
≈ 5.045 x 1024 molecules of NO2
Many chefs today are taught using a culinary arts book written in 1903. True False
Many chefs today are taught using a culinary arts book written in 1903.
This Is "TRUE"
True penn foster student also a job corps student ik cause my teacher told me this
Explanation:
Chem Questions pls help
Answer:
2 C₈H₁₈ + 25 O₂ → 16 CO₂ + 18 H₂O.
Explanation:
A combustion reaction is a major class of chemical reactions. Combustion usually occurs when a hydrocarbon reacts with oxygen to produce carbon dioxide and water.The balanced equation of combustion of octane is:2 C₈H₁₈ + 25 O₂ → 16 CO₂ + 18 H₂O.
1.0 mole of octane is combusted completely with 25.0 mole of O₂ to produce 16.0 mole of CO₂ and 18.0 mole of H₂O.
CAN SOMEONE REWRITE/SHORTEN THIS FOR ME PLEASE? I'LL GIVE BRAINLIEST
Genetically modified organisms/ GMOs can be defined as organisms in which the genetic material (DNA) has been altered in a way that does not occur naturally by mating and/or natural recombination. The technology is often called “modern biotechnology” or “gene technology”, sometimes also “recombinant DNA technology” or “genetic engineering”. It allows selected individual genes to be transferred from one organism into another, also between nonrelated species. Foods produced from or using GM organisms are often referred to as GM foods.
GM foods are developed and marketed because there is some advantage either to the producer or consumer of these GM foods. This is meant to translate into a product with a lower price, greater benefit ,or both. GM seed developers wanted their products to be accepted by producers and have concentrated on innovations that bring direct benefit to farmers and generally the food industry.
One objective for developing plants based on GM organisms is to improve crop protection. The GM crops currently on the market are mainly aimed at an increased level of crop protection through the introduction of resistance against plant diseases caused by insects or viruses or through increased tolerance towards herbicides.
Resistance against insects is achieved by incorporating into the food plant the gene for toxin production from the bacterium Bacillus thuringiensis. This toxin is currently used as a conventional insecticide in agriculture and is safe for human consumption. GM crops that inherently produce this toxin have been shown to require lower quantities of insecticides in specific situations, where pest pressure is high. Virus resistance is achieved through the introduction of a gene from certain viruses which cause diseases in plants. Virus resistance makes plants less susceptible to diseases caused by such viruses, resulting in higher crop yields.
Answer:
Here you go! 50% of your writing piece
Explanation:
Foods produced from or using GM organisms are often referred to as GM foods.
GM foods are developed and marketed because there is some advantage either to the producer or consumer of these GM foods. GM seed developers wanted their products to be accepted by producers and have concentrated on innovations that bring direct benefit to farmers and generally the food industry.
One objective for developing plants based on GM organisms is to improve crop protection. The GM crops currently on the market are mainly aimed at an increased level of crop protection through the introduction of resistance against plant diseases caused by insects or viruses or through increased tolerance towards herbicides.
Resistance against insects is achieved by incorporating into the food plant the gene for toxin production from the bacterium Bacillus thuringiensis. GM crops that inherently produce this toxin have been shown to require lower quantities of insecticides in specific situations, where pest pressure is high.
GMOs are organisms with artificially altered DNA through genetic engineering, used in agriculture, medicine, and conservation. They offer benefits like improved crops and medicinal advances but are also subject to regulatory scrutiny and public debate over safety and environmental impact.
Genetically Modified Organisms (GMOs)
Genetically modified organisms (GMOs) are those whose genetic material has been altered in ways that do not occur naturally. This process, also known as genetic engineering or recombinant DNA technology, enables the introduction of new traits to an organism. For example, genes conferring pest resistance or tolerance to herbicides can be transferred from one organism to another, even between nonrelated species. This technology has applications in agriculture for crop protection, enhancing nutritional content, and improving food production efficiency. Additionally, GMOs have promising applications in environmental conservation, medicine production, and may even address issues like plastic pollution.
However, GMOs are subject to intense debate regarding consumer safety, environmental impact, and ethical concerns. Despite their benefits, such as reduced pesticide use and increased yields, concerns about potential ecological effects, unintended health consequences, and gene transfer to non-target species lead to strict regulation and public caution. Yet, after comprehensive research, GMOs have been deemed safe for consumption.
2.5 moles of sodium chloride is dissolved
to make 0.050 liters of solution.
The answer is:
the molarity = 50 moles/liters
The explanation:
when the molarity is = the number of moles / volume per liters.
and when the number of moles =2.5 moles
and the volume per liters = 0.05 L
so by substitution:
the molarity = 2.5moles/0.05L
= 50 moles /L
MARK ME BRAINLIEST PLEASE!!!!!
What are some safety precautions that must be taken in order for nuclear reactions to occur? Give at least 5 precautions
Answer:
1. Control of Radioactivity
This requires being able to control the neutron flux. Recall that in a nuclear reactor when a neutron is captured by a fuel nucleus (generally uranium) the nucleus splits releasing radioactive particles (or undergoes fission). Hence if we decrease the neutron flux we decrease the radioactivity. The most common way to reduce the neutron flux is include neutron-absorbing control rods. These control rods can be partially inserted into the reactor core to reduce the reactions. The control rods are very important because the reaction could run out of control if fission events are extremely frequent. In modern nuclear power plants, the insertion of all the control rods into the reactor core occurs in a few seconds, thus halting the nuclear reaction as rapidly as possible. In addition, most reactors are designed so that beyond optimal level, as the temperature increases the efficiency of reactions decreases, hence fewer neutrons are able to cause fission and the reactor slows down automatically.
2. Maintenance of Core Cooling
In any nuclear reactor some sort of cooling is necessary. Generally nuclear reactors use water as a coolant. However some reactors which cannot use water use sodium or sodium salts.
3. Maintenance of barriers that prevent the release of radiation
There is a series of physical barriers between the radioactive core and the environment. For instance at the Darling Nuclear Generation Station in Canada the reactors are enclosed in heavily reinforced concrete which is 1.8m thick. Workers are shielded from radiation via interior concrete walls. A vacuum building is connected to the reactor buildings by a pressure relief duct. The vacuum building is a 71m high concrete structure and is kept at negative atmospheric pressure. This means that if any radiation were to leak from the reactor it would be sucked into the vacuum building and therefore prevented from being released into the environment.
The design of the reactor also includes multiple back-up components, independent systems (two or more systems performing the same function in parallel), monitoring of instrumentation and the prevention of a failure of one type of equipment affecting any other.
Further, regulation requires that a core-meltdown incident must be confined only to the plant itself without the need to evacuate nearby residence.
Safety is also important for the workers of nuclear power plants. Radiation doses are controlled via the following procedures,
The handling of equipment via remote in the core of the reactor
Physical shielding
Limit on the time a worker spends in areas with significant radiation levels
Monitoring of individual doses and of the work environment
What is the clockwise torque on the following lever? 5.0 Nm 125 Nm 250 Nm 0.0 Nm
Answer:
The correct answer is B: 125 Nm
Explanation:
If an applied force causes rotation from upward to downward direction than the torque is clockwise and is called as negative clockwise torque. Minus sign represents the direction of the torque. SI unit of torque is Nm.
Given data:
Force = 25 N
r = 5.0 m
Formula:
Torque = r x F
= 5.0 m X 25 N
= 125 Nm
The clockwise torque is 125 Nm ( i.e -125 Nm. Here minus sign suggests that the torque is clockwise)
Answer:
125 Nm
Explanation:
What is the clockwise torque on the following lever?
5.0 Nm
125 Nm
250 Nm
0.0 Nm
Need help ASAP plzzz
Answer: A
Explanation: Chemical changes don't change the mass. I also know that D in certainly incorrect
A 1.50-liter sample of dry air in a cylinder exerts a pressure of 3.0 atmospheres at a temperature of 25°C. Without change in temperature, a piston is moved in the cylinder until the pressure in the cylinder is reduced to 1.0 atmosphere. What is the volume of the gas? (Be sure to use the correct number of significant figures.) 0.22 L 0.50 L 2.0 L 4.5 L
Answer:
4.5L
Explanation:
Given parameters:
Inital volume, V₁ of the dry air = 1.50L
Initial pressure P₁ = 3.0atm
Temperature = 25°C
Final pressure P₂ = 1.0atm
Final volume of gas, V₂ = ?
To solve gas related problem, we apply Boyle's law based on the parameters given.
Boyle's law states that the volume of a fixed mass of gas is inversely proportional to the pressure provided that temperature is constant.
The law is simply expressed as:
P₁V₁ = P₂V₂
From the parameters given, the unknown V₂ which is the final volume.
Making V₂ the subject of the equation gives:
V₂ = [tex]\frac{P_{1} V_{1} }{P_{2} }[/tex]
V₂ = [tex]\frac{3x1.5}{1}[/tex] = 4.5L
Question 1 of 10
2 Points
A species has homologous chromosomes. What does this say about the
species?
O
A. It has alleles that control certain traits.
O
B. It has pairs of matching chromosomes.
O
C. It is a eukaryote and a haploid species.
O
D. It has DNA that is made up of genes.
Answer: The answer is (B).
Explanation:
Answer (A) is too broad because all chromosomes have alleles that control certain traits. This doesn't tell us anything about the species indicated in the question.
Answer (B) is the correct answer because homologous chromosomes can pair up during meiosis while heterogenous chromosomes cannot.
Answer (C) is incorrect because most species of animals and plants are diploids, meaning their chromosomes come in matching sets called homologous pairs.
Answer (D) is too broad because all chromosomes have DNA that is made up of genes. This doesn't tell us anything about the species indicated in the question.
Give the number of significant figures: 369,132,000 sec
A. 0
B. 6
C. 9
Answer:
A. 6
Explanation:
369 132 000 s
The important rules are
• Digits other than zero are significant
• Trailing zeroes before the decimal point are not significant
The decimal point is after the last zero, so the three zeroes are not significant,
Thus, the underlined digits in 369 132 000 are significant.
There are six significant figures in the measurement.
A. 6
is the answer for this problem
How might gull populations be affected
Answer:
Herring might be eaten by anothe kind of fish that gulls eat.
2000g of copper initially at 25C absorbs 1000J of heat. What is final temperature
Answer:
26.3°C.
Explanation:
To solve this problem, we can use the relation:Q = m.c.ΔT,
where, Q is the amount of heat absorbed by copper (Q = 1000 J).
m is the mass of the copper (m 2000 g).
c is the specific heat of copper (c = 0.385 J/°C.g).
ΔT is the difference between the initial and final temperature (ΔT = final T - initial T = final T - 25°C).
∵ Q = m.c.ΔT
∴ (1000 J) = (2000 g)(0.385 J/°C.g)(final T - 25°C)
∴ (final T - 25°C) = (1000 J)/(2000 g)(0.385 J/°C.g) = 1.299.
∴ final T = 25°C + 1.299 = 26.299°C ≅ 26.3°C.
Consider this equilibrium for a buffer solution: CH3COOH + H2O CH3COO- + H3O + . When a small amount of acid is added to this system, which statement is true when equilibrium is reestablished? A. [CH3COO-] and pH have both increased. B. [CH3COOH] and pH have both decreased. C. [CH3COO-] has decreased and pH remains relatively constant. D. [CH3COOH] has decreased and pH remains relatively constant. E. [CH3COO-] has increased and pH remains relatively constant.
Answer:
e
Explanation:
This equilibrium for a buffer solution: CH3COOH + H2O CH3COO- + H3O + When a small amount of acid is added to this system,
E. [CH3COO-] has increased and pH remains relatively constant.
What kind of buffer would be a mixture of CH3COOH and CH3COONa?acidic buffer
A mixture of a weak acid and its salt with a strong base serves as an acidic buffer. The reaction shows that some acetic acids react with the OH– from the base and converts it to water.
Which of the following is not a buffer solution CH3COOH CH3COONa?HCl and NaCl. Buffer is an equimolar mixture of weak acid and salt with a strong base.
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If Maria winks exactly 5 times every minute and she sleeps
exactly 8 hours a day, how many times does Maria wink every
day?
Answer:
4800 times does Maria wink every day.
Explanation:
Number of time Maria winks= 5 times in minute = 5 winks/min
Number of hours she sleeps in day = 8 hours
1 day = 24 hours
Number of hours when Maria is not sleeping = 24 hour - 8 hour = 16 hours
1 hour = 60 minutes
16 hours = 16 × 60 min = 960 min
number of winks in 960 minutes:
[tex]960 min\times 5 winks/min=4800 winks[/tex]
4800 times does Maria wink every day.
She winks 192 times every day.
This is just basic arithmetic.
In a day, we have 24 hours.
Now, 60 minutes make an hour.
Thus,
Number of minutes in a day = 60 × 24 = 1440 minutes
She sleeps 8 hours a day.
This is same as; 8 × 60 = 480 minutes
Thus, total time she is awake in a day = 1440 - 480 = 960 minutes
She winks every 5 minutes.
Thus, number of winks = 960/5 = 192 winks
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I mark brainliest pls help
Answer:
c
Explanation:
Answer:
I want to say the answer is B
Explanation:
Tutorial queshers Set 1
| Why does molecule become a chiral if has a Plane of symmetry even through it has stereocenter
Answer:
Here's what I get.
Explanation:
Consider the molecule shown below.
It has two chiral centres, labelled R and S, and an internal mirror plane that makes the right and left halves of the molecule mirror images of each other.
If we pass a beam of plane-polarized light through the sample, the R portion of the molecule will rotate the light in a certain direction.
However, the S portion will rotate the light by the same amount in the opposite direction.
The two effects cancel each other, so the molecule has no net effect on plane-polarized light.
Even though the molecule has two chiral centres, it is achiral because it has an internal plane of symmetry.
4. What mass of urea is produced from 9.0 liters of ammonia?
The reaction is 2NH3(g) + CO2(g) → H2NCONH2(g) + H2Og)
Answer:
12.07 g.
Explanation:
The balanced equation for the mentioned reaction is:2NH₃(g) + CO₂(g) → H₂NCONH₂(g) + H₂O(g),
It is clear that 2.0 moles of NH₃ react with 1.0 mole of CO₂ to produce 1.0 mole of H₂NCONH₂ and 1.0 moles of H₂O.
Consider the reaction proceeds at STP conditions:At STP, 9.0 L of NH₃ react with an excess of CO₂ gas:
It is known that at STP: every 1.0 mol of any gas occupies 22.4 L.
using cross multiplication:
1.0 mol of NH₃ represents → 22.4 L.
??? mol of NH₃ represents → 9.0 L.
∴ 9.0 L of NH₃ represents = (1.0 mol)(9.0 L)/(22.4 L) = 0.4018 mol.
To find the no. of moles of urea (H₂NCONH₂) produced:Using cross multiplication:
2.0 mol of NH₃ produce → 1.0 mol of H₂NCONH₂, from stichiometry.
0.4018 mol of NH₃ produce → ??? mol of H₂NCONH₂.
∴ The no. of moles of H₂NCONH₂ = (1.0 mol)(0.4018 mol)/(2.0 mol) = 0.201 mol.
Now, we can find the mass of H₂NCONH₂ produced:mass = n * molar mass = (0.201 mol) * (60.06 g/mol) = 12.07 g.
The mass of urea produced from 9.0 litres of ammonia is 12.227 grams.
To solve this problem, we need to follow these steps:
1. Write down the balanced chemical equation:
[tex]\[ 2NH_3(g) + CO_2(g) \rightarrow H_2NCONH_2(g) + H_2O(g) \][/tex]
2. Calculate the molar mass of ammonia[tex](\( NH_3 \))[/tex]:
- The atomic mass of nitrogen (N) is approximately 14.01 g/mol.
- The atomic mass of hydrogen (H) is approximately 1.008 g/mol.
- Since there are 3 hydrogen atoms in ammonia, the total atomic mass for hydrogen is ([tex]\( 3 \times 1.008 \)[/tex]) g/mol.
- The molar mass of ammonia is [tex]\( 14.01 + (3 \times 1.008) \)[/tex] g/mol.
3. Convert the volume of ammonia to moles:
- The density of ammonia gas at standard conditions is approximately 0.771 g/L.
- Convert the volume of ammonia from litres to grams using the density.
- Then, convert grams of ammonia to moles using the molar mass calculated in step 2.
4. Use the stoichiometry of the balanced equation to find the moles of urea[tex](\( H_2NCONH_2 \))[/tex]produced:
- According to the balanced equation, 2 moles of ammonia produce 1 mole of urea.
- Therefore, the moles of urea produced will be half the moles of ammonia.
5. Calculate the molar mass of urea [tex](\( H_2NCONH_2 \))[/tex]:
- The molar mass of urea can be calculated by adding the atomic masses of the constituent atoms.
- Urea consists of 2 nitrogen atoms, 4 hydrogen atoms, 1 carbon atom, and 1 oxygen atom.
6. Convert the moles of urea to grams:
- Multiply the moles of urea by its molar mass to get the mass in grams.
Now, let's perform the calculations:
1. Molar mass of [tex]\( NH_3 \):[/tex]
[tex]\[ \text{Molar mass of } NH_3 = 14.01 + (3 \times 1.008) = 17.034 \text{ g/mol} \][/tex]
2. Mass of 9.0 liters of ammonia:
[tex]\[ \text{Mass of } NH_3 = 9.0 \text{ L} \times 0.771 \text{ g/L} = 6.939 \text{ g} \][/tex]
3. Moles of ammonia:
[tex]\[ \text{Moles of } NH_3 = \frac{6.939 \text{ g}}{17.034 \text{ g/mol}} \approx 0.4073 \text{ mol} \][/tex]
4. Moles of urea produced:
[tex]\[ \text{Moles of urea} = \frac{0.4073 \text{ mol}}{2} \approx 0.20365 \text{ mol} \][/tex]
5. Molar mass of urea[tex](\( H_2NCONH_2 \))[/tex]:
[tex]\[ \text{Molar mass of urea} = 2 \times 14.01 + 4 \times 1.008 + 12.01 + 16.00 = 60.062 \text{ g/mol} \][/tex]
6. Mass of urea produced:
[tex]\[ \text{Mass of urea} = 0.20365 \text{ mol} \times 60.062 \text{ g/mol} \approx 12.227 \text{ g} \][/tex]
Therefore, the mass of urea produced from 9.0 litres of ammonia is approximately 12.227 grams.
The correct answer is [tex]\boxed{12.227 \text{ g}}.[/tex]
The complete question is:
What mass of urea is produced from 9.0 litres of ammonia?
The given reaction is [tex]2NH_3(g) + CO_2(g) = H_2NCONH_2(g) + H_2O(g)[/tex]
Convert to standard notation.
1.312 x 10^2
Answer: The answer would be 131.2
Explanation: How I got my answer is quite simple. In order for it to turn into standard notation, it would need to be turned into the answer of an equation. The equation here would be "1.312 x 10^2". 10^2 would be 100. Multiply 100 by 1.312 will make the decimal point move 2 times to the right, so it will end up in front of the 2. That would make the answer 131.2
I hope this info helps! :P
Why are redox reactions used in batteries?
The attraction between charged ions releases energy.
The movement of electrons creates an electric current.
The reactions are extremely exothermic, producing an electric current.
The reactions are extremely endothermic, inducing the movement of electrons.
Answer:
The movement of electrons creates an electric current.
Explanation:
Batteries are electrochemical cells which are devices in which chemical reactions produce an electric current, that is, devices for converting chemical energy into electrical energy.
The reactions involved here are spontaneous redox reactions hence an electric current flows on its own in the external circuit.
In such reactions, there is an electronic movement which creates a potential difference between the two electrodes thereby generating a flow of an electric current in the external circuit. The current flows in the opposite direction to the electronic movement due to chemical reactions.
The flow of the electric current results in an the production of electrical energy while the electronic movement instigates a chemical energy.
Answer:
There's no one-upping that one so I'll just tell you that it was right on my test :)
Explanation:
you're welcome
Which is most likely to be the energy source for organisms living in hydrothermal vents?
A: oxygen
B: sunlight
C: methane
D: carbon dioxide
Methane because I just know and it is very hard to explain
The organisms living in the hydrothermal vent are provided by the energy with methane. Thus, option C is correct.
What are hydrothermal vents?Hydrothermal vents are the fissures near the volcanos in the seafloor that supports the ecosystem deep inside the sea.
The animals near the hydrothermal vents are octopus, crabs, zoarcid fishes, etc. The living of the organism in the cold water in the vent is supported by the absence of sunlight. The carbon compound act as the energy source at the hydrothermal vent.
Thus, the organisms in the hydrothermal vent are supported with energy by methane molecules. Hence, option C is correct.
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What is the electron structure of a sodium atom?
A. 1s22s22p63s1
B. 2s22s22p63s1
C. 1s22s22p63s6
D. 1s12s22p63s1
Answer:
1s22s22p63s1 is the electronic configuration of sodium.
Explanation:
There are 11 electrons in Sodium ( find this on the periodic table).
Then you need to arrange the electrons in the orbitals around the nucleus.
The structure would be written as A. 1s^22s^22p^63s^1
how many grams of NH3 is made if 11 grams of N2 are used
here is the answer:
if we take the molecular formula, then
28 g Nitrogen forms 17 g ammoni.
so, 11 g Nitrogen forms 17/28 × 11=6.67 g ammonia.
Hence 6.67 g NH3 is formed by 11 g N2
Answer:
13.35 grams of NH₃ is made if 11 grams of N₂ are used.
Explanation:
First of all you should know that the balanced reaction is:
N₂(g) + 3 H₂-> 2 NH₃(g)
Then, it is possible to determine the mass of each compound that reacts or is produced in the reaction by knowing the atomic mass of each element:
N: 14 g/moleH: 1 g/moleThen:
N₂: 2*14 g/mole= 28 g/moleH₂: 2*1 g/mole= 2 g/moleNH₃: 14 g/mole+3*1 g/mole= 17 g/moleBy reaction stoichiometry of the reaction (that is, the relationship between the amount of reagents and products in a chemical reaction) you can see that they react or are obtained in moles:
N₂: 1 moleH₂: 3 molesNH₃: 2 molesThen, by the reaction stoichiometry of the reaction, you can see the amounts of mass that react or are obtained:
N₂: 1 mole*28 g/mole= 28 gH₂: 3 moles*2 g/mole= 6 gNH₃: 2 moles*17 g/mole= 34 gTo calculate the amount of NH₃ mass produced if 11 grams of N₂ are used, it is possible to use a rule of three knowing the stoichiometry of the reaction. The rule of three used is the following: if 28 grams of N₂ produce 34 grams of NH₃, 11 grams of N₂ how many grams of NH₃ will they produce?
[tex]gramsofNH_{3} =\frac{11gramsofN_{2} *34gramsofNH_{3} }{28 grams of N_{2} }[/tex]
grams of NH₃=13.35
Then, 13.35 grams of NH₃ is made if 11 grams of N₂ are used.
PLEASE HELP!!
The table shows the mass and boiling point of some substances.
( I attached a picture of the table )
Part 1: Is the value of M less than, greater than, or equal to the value of N?
Part 2: Explain your answer for Part 1.
Answer: the boiling point of a substance dosent bater how muc hof there it is if there is 100 gallons of water it still boils at 100 c jus takes longer due to more space but if you do 1 gallon it is also 100 c but is faster due to less space to heat up
Part 1:
It appears from the question that M refers to the boiling point of water when the mass is 2, and N refers to the boiling point of Soybean Oil also at a mass of 2. Without the exact figures for M and N given in the question, one can deduce that if both substances have the same mass, N, the boiling point of soybean oil, is greater than M, the boiling point of water. This is because water's boiling point is known to be 100 °C, which is significantly lower than that of soybean oil.
Part 2:
The boiling points of substances heavily depend upon intermolecular forces. Water has a high boiling point relative to its molar mass because of the strong hydrogen bonds between water molecules. However, soybean oil, which consists of long-chain hydrocarbons, likely has different intermolecular forces, such as London dispersion forces, which are stronger due to the larger molar mass and lead to an even higher boiling point.
Therefore, based on our understanding of intermolecular forces and the given information that soybean oil has a boiling point of 300 °C, we can confirm that N is greater than M.
How many moles of FeS2 are required to produce 32g of SO2?
Answer:
So, the right answer is
No. of moles of FeS₂ = 0.25 mole
Explanation:
From the balanced
4 FeS2 + 11 O2 → 2 Fe2O3 + 8 SO2
it is clear that 4 mol FeS₂ react with O₂ to give Fe₂O₃ and 8 mol of SO₂
First, we have to convert mass of SO₂ into No. of moles as following:
SO₂ has molar mass = 64 g/mol
No. of moles of SO₂ = (mass / molar mass) = (32 g / 64 g/mol) = 0.5 mol
we know that
4 mol FeS₂ gives→ 8 mol of SO₂
1 mol FeS₂ gives→ 2 mol of SO₂
??? mol FeS₂ gives→ 0.5 mol of SO₂
No. of moles of FeS₂ = (0.5 mol * 1 mol ) / 2 mol = 0.25 mol
So, the right answer is
No. of moles of FeS₂ = 0.25 mol
To produce 32g of SO₂, 0.25 moles of FeS₂ are required. This is determined using the balanced chemical equation and mole ratio conversions. The calculation involves determining the moles of SO₂ and then using the ratio from the equation.
Number of moles of FeS₂ are required to produce 32g of SO₂, we start by looking at the balanced chemical equation for the reaction: 4 FeS₂ + 11 O₂ → 2 Fe₂O₃ + 8 SO₂
From the equation, 4 moles of FeS₂ produce 8 moles of SO₂. We need to determine the moles of SO₂ present in 32g:
Step 1: Calculate moles of SO₂
Molar mass of SO₂ = 32.07 (S) + 2*16.00 (O) = 64.07 g/mol
Moles of SO₂ = 32g / 64.07 g/mol = 0.5 moles of SO₂
Step 2: Use the mole ratio to find moles of FeS₂
According to the balanced equation, the mole ratio of FeS₂ to SO₂ is 4:8 or 1:2.
Therefore, moles of FeS₂ required = 0.5 moles SO₂ * (4 moles FeS₂ / 8 moles SO₂) = 0.25 moles of FeS₂
Thus, we need 0.25 moles of FeS2 to produce 32g of SO2.
What is the expected product when l-propanol is oxidized?
propanal
propanoic acid
propanone
propene
PLEASE EXPLAIN HOW YOU GOT YOUR ANSWER
Answer: propanal and propanoic acid
Explanation: first of all Oxidation of alcohol with mild oxidizing reagent PCC gives Carbonyl compounds and with strong oxidizing agent like CrO3 and kmno4 gives carboxylic acids.
And primary alcohol gives Aldehyde with mild oxidizing reagent and carboxylic acids with strong oxidizing agent.
And ketone is formed with secondary alcohol by both mild and strong Oxidizing agent.
Here our compound is primary alcohol hence we will get propanal and propanoic acid depending on type of Oxidizing agent
Answer:
propanoic acid
Explanation:
One of the properties of alkanols is the fact that they can be oxidized to various products depending on the structure of the alkanol.
A primary alkanol (such as 1-propanol) is oxidized to an alkanal and subsequently to an alkanoic acid.
A secondary alkanol is oxidized to an alkanone while a tertiary alkanol is not oxidized.
This implies that the final product of the oxidation of 1-propanol is propanoic acid as shown in the answer.
3AI²O³
What is the name of the element
Answer:
3 Aluminum Oxide
Explanation:
It is not an element but a coumpound.
Al is Aluminum
O is oxygen.
each reation releases or absorbs a very large amount of energy per atom.
A.chemical and nuclear reaction
B. Chemical reactions.
C. no reaction
D. nuclear reation
Answer:
chemical and nuclear reaction
Explanation:
Answer: Option (D) is the correct answer.
Explanation:
A chemical reaction is defined as a reaction that involves exchange of electrons between the combining atoms. Not every chemical reaction releases or absorbs a very large amount of energy per atom.
On the other hand, a reaction that involves change in atomic nuclei of an atom either by splitting or combining of two atomic nuclei is known as a nuclear reaction.
For example, [tex]^{2}_{1}H + ^{3}_{1}H \rightarrow ^{4}_{2}He + ^{1}_{0}n + Energy[/tex]
Nuclear fission is a reaction in which a large nucleus splits by absorption of energy into two atomic nuclei. Nuclear fusion is a reaction in which two atomic nuclei combine together to result in the formation of a large atomic nuclei along with release of energy.
Each nuclear reaction releases or absorbs a very large amount of energy per atom.
Therefore, we can conclude that each nuclear reaction releases or absorbs a very large amount of energy per atom.