Answer:
5878.6 j
1.405 cal
Explanation:
Given data:
Specific heat of fat = 0.45 cal/g.°C or 1.9 j/g.°C
Density of fat = 30.94 g/cm³
Initial temperature = 25°C
Final temperature = 35°C
Energy needed = ?
Volume of fat = 10 cm³
Solution:
First of all we will calculate the mass of fat from given density and volume.
d = m/v
30.94 g/cm³ = m/ 10 cm³
m = 30.94 g/cm³ × 10 cm³
m = 309.4 g
Now we will calculate the energy needed for fat.
Q = m.c. ΔT
Q = amount of heat absorbed or released
m = mass of given substance
c = specific heat capacity of substance
ΔT = change in temperature
ΔT = T2 - T1
ΔT = 35°C - 25°C
ΔT = 10°C
Q = m.c. ΔT
Q = 309.4 g . 1.9 j/g.°C . 10°C
q = 5878.6 j
In calories,
5878.6 / 4184 = 1.405 cal
The energy required to heat 10cm3 of fat from 25°C to 35°C is calculated using the specific heat formula. The calculations in calories and joules are 42.3 cal and 178.6 Joules respectively.
Explanation:To calculate the amount of energy needed to heat 10 cm3 of fat from 25 °C to 35 °C, we have to understand the concept of specific heat, which is the energy required to raise the temperature of 1 gram of a substance by 1 °C. Here, we are dealing with the substance fat, which has a specific heat of 0.45 cal/(g ⋅ °C) or 1.9 J/g °C and a density of 0.94 g/cm3.
First, determine the mass of the fat using the formula mass = volume × density. Here, volume is 10 cm3 and density is 0.94 g/cm3, which gives us a mass of 9.4 g. The change in temperature (ΔT) we need is from 25°C to 35°C, hence ΔT = 35 - 25 = 10 °C.
The energy required can then be calculated using the formula energy = mass × specific heat × ∆T. For calories, the calculation is energy = 9.4g × 0.45 cal/(g °C) × 10 °C = 42.3 cal. For Joules, the calculation is energy = 9.4 g × 1.9 J/(g °C) × 10°C = 178.6 Joules.
Learn more about Specific Heat here:https://brainly.com/question/31608647
#SPJ3
What is the acronym that describes conditions
that promote bacterial growth?
Answer:
FAT TOM
Explanation:
FAT TOM is used in food industry which describe six suitable conditions that promote the growth of bacteria.
Acronym of FAT TOM is
Food , acidity , time. temperature , oxygen and moisture.
Food contains the nutrients and other favorable requirements which is required for bacterial growth and it causes the food spoilage and if taken by human can cause food poisoning.
The acronym FATTOM is often used to describe factors essential for bacterial growth. Understanding these conditions is important for protein production using bacteria. Protein folding is the process by which a protein assumes its functional three-dimensional structure.
The acronym that describes conditions that promote bacterial growth is not specified in the provided materials, but often FATTOM is used to describe the factors essential for bacterial growth, which stands for Food, Acidity, Temperature, Time, Oxygen, and Moisture. Bacterial growth is of interest in various fields, including those seeking to collect protein. Bacteria can be used to express proteins which are later harvested for research or pharmaceutical purposes.
Protein Folding
Protein folding is the process by which a protein structure assumes its functional shape or conformation. Proper folding is crucial for a protein to function correctly. Misfolded proteins can lead to diseases such as Alzheimer's and Parkinson's. Understanding the conditions for bacterial growth allows for optimizing protein expression and ensuring proper protein folding during production.
Conditions for Bacterial Growth
To culture bacteria and promote growth, enrichment culture media are often used, which favor the expansion of specific bacteria presenting in low numbers. Environmental conditions affecting bacterial growth include temperature, pH, oxygen levels, and other factors like osmotic and barometric pressure. Categories of bacteria, such as psychrophiles and thermophiles, have unique growth requirements that must be met to thrive.
Formula weight of ammonium sulfate is ______ amu
Answer:
132
Explanation:
Answer:
132
Explanation:
Classify each property as physical or chemical.
Answer:
Physical changePhysical changes are changes affecting the form of a chemical substance, but not its chemical composition. Physical changes are used to separate mixtures into their component compounds, but can not usually be used to separate compounds into chemical elements or simpler compounds.[1]
Physical changes occur when objects or substances undergo a change that does not change their chemical composition. This contrasts with the concept of chemical change in which the composition of a substance changes or one or more substances combine or break up to form new substances. In general a physical change is reversible using physical means. For example, salt dissolved in water can be recovered by allowing the water to evaporate.
A physical change involves a change in physical properties. Examples of physical properties include melting, transition to a gas, change of strength, change of durability, changes to crystal form, textural change, shape, size, color, volume and density.
An example of a physical change is the process of tempering steel to form a knife blade. A steel blank is repeatedly heated and hammered which changes the hardness of the steel, its flexibility and its ability to maintain a sharp edge.
Many physical changes also involve the rearrangement of atoms most noticeably in the formation of crystals. Many chemical changes are irreversible, and many physical changes are reversible, but reversibility is not a certain criterion for classification. Although chemical changes may be recognized by an indication such as odor, color change, or production of a gas, every one of these indicators can result from physical change.
Chemical changeChemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. These processes are called chemical reactions and, in general, are not reversible except by further chemical reactions.
I hope it will help youplz mark me as brainliestplz thank my answerPhysical properties are characteristics of matter that can be observed or measured without changing the substance's chemical composition. Chemical properties, describe how a substance interacts with other substances, indicating its ability to undergo chemical reactions.
Physical properties are those that can be observed or measured without altering the chemical identity of a substance. These include characteristics such as color, density, melting point, boiling point, odor, and conductivity. For example, when you melt ice to form water, it remains H2O throughout the process, so the change in state (from solid to liquid) is a physical change. Similarly, the change in color of a metal when it's heated is also a physical property, as it doesn't alter the metal's composition.
Chemical properties, on the other hand, describe how a substance interacts with other substances and its ability to undergo chemical reactions. These properties include reactivity, flammability, toxicity, and the ability to rust or corrode. For instance, when iron rusts upon exposure to oxygen and moisture, it's undergoing a chemical change because its composition changes from pure iron (Fe) to iron oxide (Fe2O3).
In summary, physical properties involve observable characteristics that don't change a substance's composition, while chemical properties describe a substance's behavior in chemical reactions and how it can transform into different substances.
Learn more about chemical properties here: https://brainly.com/question/32891137
#SPJ6
This feature on Earth forms underground. This one seen here was formed from water flowing through layers of limestone rock underground. What is this feature called? A) cavern B) canyon C) pothole D) underground spring
A sample of 22K gold contains the following: 22 g gold, 1.0 g silver, and 1.0 g copper. What is the percent gold in the sample? Group of answer choices
Answer:
35 percent
Explanation:
Answer:92%
Explanation:
what controls the rate of movement of groundwater? PLZ HELP
Answer:
Groundwater flow rates are controlled by the permeability of the aquifer through which the water is flowing and by the local hydraulic gradient (the drop in hydraulic head per unit distance; equal to the slope of the water table for unconfined aquifers).
Explanation:
I hope that helps you
I kind of get how to do this but don’t fully #’s 2, 3, and 4
Answer:2. 109 g NaCl
3. 31.9 g ZnCl2
4. 15.4 g Al2O3
Explanation: First find moles of the given compound
Next do the mole ratio between both compounds
Convert moles to mass.
Name: Date:
1. According to Mike's mom, what is a cell?
A. a multicellular organism
B. the smallest unit of life
C. a type of tissue
D. a gel-like fluid
2 Von doce Mike's mom compare the cell me
Answer:
The Answer is B
Explanation:
Because a cell is the small unit of life it is the one that help us.
A cell is the smallest unit of life, performing various functions in living organisms. Cells make up tissues in the human body.
Explanation:According to Mike's mom, a cell is the smallest unit of life. It is a microscopic structure that makes up all living organisms, including plants and animals.
Cells perform various functions, such as energy production and protection. They contain different components, including a nucleus, cytoplasm, and cell membrane.
For example, in a human body, cells form different types of tissues, such as muscle tissue or nerve tissue, which have specific functions in the body.
Learn more about Cell Structure here:https://brainly.com/question/31349292
#SPJ3
Consider the chemical reaction represented below
N2 + 02 - Heat - 2NO
Which of the following statements about this reaction is true?
A. The reaction requires water to take place.
B. Oxygen is produced by the reaction
C. The reaction releases hea
D. Heat is absorbed by the reaction
Answer:
D
Explanation:
Answer:
heat is absorbed by the reaction
Explanation:
HELP!! THIS IS DUE IN AN HOUR !
Answer:
1 is the the earth and 2 is all of the above
Explanation:
Answer:
The answer is for 1. Earth. 2. Burrows
These imprints give scientists clues as to how these animals lived.
Explanation:
For the oxidation of glucose (C6H12O6 + 602 + 6H20 + 6CO2), how many grams of
oxygen gas will be consumed when 950 g of glucose is oxidized completely?
A) 480 g
B) 571 g
C) 960 g
D) 1,013g
Answer:D. 1013 g O2
Explanation: solution attached:
Convert mass of glucose to moles
Do the mole ratio of glucose and oxygen gas based on the balanced equation
Convert moles of O2 to mass using its molar mass
Select the true characteristics of respiration.
produces ATP
plants lose weight
is dependent on light
produces ethyl alcohol
occurs around the clock
takes place in the chloroplasts
responds to changes in temperature
takes in carbon dioxide, puts out oxygen
Answer:
takes in carbon dioxide, puts out oxygen.
Explanation:
The true characteristics of respiration are that it produces ATP, occurs constantly, and responds to temperature changes. Respiration does not happen in chloroplasts, depend on light, or involve taking in carbon dioxide and releasing oxygen.
Explanation:The true characteristics of respiration include: produces ATP, occurs around the clock, and responds to changes in temperature. Respiration is a biochemical process where cells break down glucose and other molecules to produce ATP (adenosine triphosphate), which provides energy for various cell processes. It happens continuously, regardless of whether it's day or night, hence it 'occurs around the clock'. Although it doesn't directly depend on external temperature, respiration rates can vary with temperature changes because enzymes involved in this process are sensitive to temperature.
However, it is not true that respiration 'takes place in the chloroplasts' or that it 'is dependent on light'. These characteristics are related to photosynthesis, not respiration. Additionally, respiration 'takes in oxygen and puts out carbon dioxide', not the other way round.
Learn more about Respiration here:https://brainly.com/question/33781522
#SPJ6
Help me please!!!!!!!!
Answer:
that's a hard one
Explanation:
Answer:Zn + 2 HCl => ZnCl2 + H2
Explanation: Zinc has 1 atom in the reactant and product side
2 atoms for H on both sides and 2 atoms of chlorine in the reactant and product side.
Which of the following choices is and example of a capital good
Answer:
An example of a capital good is "the government will open another public school in the area".
Explanation:
A capital good or complicated products and systems or (CoPS) is a reliable commodity used in the manufacturing of goods and services. These are one of three kinds of consumer commodities, while the other two are property and labor.
The three are also commonly referred to as primary production factors.They are recorded on a company's balance sheet as assets, and can be depreciated over time. Capital goods instances include furniture, buildings, machinery, equipment and fixtures.
A capital good, like a factory building or a delivery van, is a tangible asset used by an organization to produce goods or services. It is part of the production process to provide consumer goods or services.
Explanation:A capital good is any tangible asset that an organization uses to produce goods or services that are used in the production process to provide consumer goods or services. Common examples of capital goods include buildings, machinery, equipment, vehicles, and tools. By this definition, a factory building would be a capital good as it is used by companies to manufacture products. Other examples include a delivery van used by a courier service or a wood oven used by a bakery.
Learn more about Capital Goods here:https://brainly.com/question/36979153
#SPJ3
Demonstrate In A Brief Paragraph How The Search To Explain Planetary Orbits Exemplifies The Scientific Method
People firstly believe that the planets move in a circular orbit until Newton came up with his hypothesis by inventing calculus so that we could understood and calculated planetary orbits and their accuracy.
Explanation:
Everyone assumed the planets were perfect circles until Newton came up with an idea. Slowly people would make maps of the orbits that added circles on circles, and they could never really explain about the movement of the planet. They simply say that planets move on circles but they lacked the math to explain or prove it. Then Newton came up with an idea of inventing calculus so that we could understood and calculated planetary orbits and their accuracy. Firstly people used their observations and say that the orbits looked like circles, then they developed their models and did the math, and proposed their hypothesizes which were wrong, until Newton came along and tried to match a model that used elliptical orbits and invented the math that allowed him to make predictions with it. His model worked for most planets. However he could not explain about the planet Mercury for instance since it was a very strange orbit. Then after the Einstein's theory of General Relativity he could also explain very deeply about it.Scientists and Astronomers made hypothesizes that there was another planet orbiting too close to the sun to see with telescopes, called Vulcan, that explained mercury's orbit before Einstein's theory. Then long after we had telescopes which was good enough to see if there was a planet orbiting closer to the sun than mercury.Answer:
Everyone assumed the planets were perfect circles until Newton came up with an idea. Slowly people would make maps of the orbits that added circles on circles, and they could never really explain about the movement of the planet. They simply say that planets move on circles but they lacked the math to explain or prove it. Then Newton came up with an idea of inventing calculus so that we could understood and calculated planetary orbits and their accuracy.
Firstly people used their observations and say that the orbits looked like circles, then they developed their models and did the math, and proposed their hypothesizes which were wrong, until Newton came along and tried to match a model that used elliptical orbits and invented the math that allowed him to make predictions with it. His model worked for most planets.
However he could not explain about the planet Mercury for instance since it was a very strange orbit. Then after the Einstein's theory of General Relativity he could also explain very deeply about it.
Scientists and Astronomers made hypothesizes that there was another planet orbiting too close to the sun to see with telescopes, called Vulcan, that explained mercury's orbit before Einstein's theory. Then long after we had telescopes which was good enough to see if there was a planet orbiting closer to the sun than mercury.
can someone please explain how to do number 11?
Answer:
HBr + Mg(OH)2 —> MgBr2 + H2O.
To balance the above, we must do a head count of the individual atoms present to ensure they balance on both sides of the equation. To get the balance equation, add 2 in front of HBr and 2 in front of H2O as shown below:
2HBr + Mg(OH)2 —> MgBr2 + 2H2O
We can see clearly that the numbers of the individual atoms on the left side is the same on the right side
What is the pH of a 0.1 M acid solution?
Answer:
Explanation:
If a strong acid HA = H= + A- 100%
pH = -log [H+] = - log 0.1= -(-1)=1
Answer:
The pH is 1. I got this question right on my assignment.
What is the molality of a solution that contains 1.34 moles of NaCl in 2.47 kg of solvent
The molality is 0.54 M when 1.34 moles of NaCl is present in 2.47 kg of solvent.
Explanation:
Molality is the measure of how much of amount of solute is dissolved in the solvent. So it is calculated as the ratio of moles of solute to the grams of solvent.
[tex]\text {Molality}=\frac{\text {Moles of solute}}{\text {Mass of solvent}}[/tex]
As in this case, the solute is NaCl and solvent is unknown. So the moles of solute is given as 1.34 moles and the mass of solvent is given as 2.47 kg.
Hence, [tex]\text { molality }=\frac{1.34}{2.47}= 0.54 \mathrm{M}[/tex]
Thus, the molality is 0.54 M when 1.34 moles of NaCl is present in 2.47 kg of solvent.
The molality of a solution containing 1.34 moles of NaCl in 2.47 kg of solvent is calculated by dividing the moles of NaCl by the kilograms of solvent, resulting in approximately 0.5425 moles per kilogram.
Explanation:The molality of a solution is defined as the number of moles of solute per kilogram of solvent. In this case, we are asked to calculate the molality of a solution containing 1.34 moles of NaCl dissolved in 2.47 kg of solvent. To find the molality, we just need to divide the moles of solute by the kilograms of solvent.
The calculation would be:
Write down the molality equation: molality (m) = moles of solute / mass of solvent in kg.
Insert the given values into the equation: m = 1.34 moles NaCl / 2.47 kg solvent.
Calculate the result: m = (1.34 moles) / (2.47 kg) = approx. 0.5425 moles/kg. This is the molality of the NaCl solution.
Which has the higher percentage of aluminum, Al2O, or Al(NO3)3
Answer: Al20
Explanation:
Al2O3, or aluminum oxide, has a higher percentage of aluminum content (~52.9%) than Al(NO3)3, aluminum nitrate (~12.7%). This is due to Al2O3 containing two aluminum atoms in its formula, whereas Al(NO3)3 contains only one.
Explanation:To determine which compound has a higher percentage of aluminum, we need to compare the aluminum content in Al2O3 and Al(NO3)3.
In Al2O3, also known as aluminum oxide, there are two aluminum atoms and three oxygen atoms. The molar mass of Al2O3 can be calculated by adding the atomic masses of 2 aluminum atoms (2x27 g/mol) and 3 oxygen atoms (3x16 g/mol), which amounts to 102 g/mol. The mass of aluminum in the compound is 54 g/mol (2x27 g/mol), resulting in an approximate aluminum content of 52.9% by mass for Al2O3.
For Al(NO3)3, aluminum nitrate, it contains one aluminum atom and three nitrate groups. The molar mass of Al(NO3)3 is comprised of the mass of one aluminum atom (27 g/mol) plus the mass of three nitrate ions (3x(14+3x16) g/mol), which sums up to 213 g/mol. Here, the aluminum's mass percentage is about 12.7%.
Comparing these percentages, Al2O3 has a higher percentage of aluminum than Al(NO3)3.
What is the correct answer?
Answer:
Bleach and seawater are identified wrong.
Explanation:
Acids have an pH that is lower than 7 and bases have a pH of higher than 7 and (pH 7 is neutral)
We can observe from the table that bleach has a pH of 13 which is higher than 7 and shows basic characteristics
As for seawater the table shows it has a pH of 8 which is also a base. Therefore the answer is 3rd option "Bleach and seawater should be identified as bases".
what mass of aluminum hydroxide is needed to decompose in order to produce aluminum oxide and 35 L of water at STP
The mass of aluminium hydroxide is 81.12 g.
Explanation:
The chemical equation for the decomposition of Aluminium hydroxide follows:
2 Al(OH)3 ------> Al2O3 + 3H2O
At STP:
22.4 L of volume is occupied by 1 mole of a gas.
So, 35 L of the volume will be occupied by = (1 / 22.4) [tex]\times[/tex] 35 = 1.56 mol
By Stoichiometry of the reaction:
3 moles of water is produced by 2 moles of Aluminium hydroxide
So, 1.56 moles of water is produced by = (2 /3) [tex]\times[/tex] 1.56 = 1.04 mol.
To calculate the mass of Aluminium hydroxide, we use the equation:
Number of moles = given mass / molar mass
Number of moles of Aluminium hydroxide = 1.04 mol
The Molar mass of Aluminium hydroxide = 78 g/mol
Putting values in above equation, we get:
1.04 mol = mass of Aluminium hydroxide / 78
The mass of Aluminium hydroxide needed is 81.12 grams.
How many grams of lithium chloride can be produced from 14.3 g of lithium chlorate when it decomposes into lithium chloride and oxygen gas?
6.7 grams of lithium chloride will be produced.
Explanation:Lithium chlorate is LiClO₃ and lithium chloride is LiCl. The reaction is,
2LiClO₃ = 2LiCl +3O₂.
So here, 2 moles of lithium chlorate produces 2 moles of lithium chloride.
Or, one molecule of lithium chlorate will produce one mole of lithium chloride.
Molecular weight of lithium chlorate =[tex]6.9 + 35.5 + 16\times3[/tex] = 90.4.
So, 14.3 grams of lithium chlorate has 0.16 moles of lithium chlorate.
Thereby, moles of lithium chloride produced is 0.16 moles.
Molecular weight of lithium chloride = [tex]6.9+35.5[/tex] = 42.4 grams.
So weight of lithium chloride produced = [tex]42.4 \times 0.16[/tex] = 6.7 grams.
Thus, weight of lithium chloride produced will be 6.7 grams.
An unsaturated alkene or alkene is a result from a loss of hydrogen atoms true or false
Answer:
True
Explanation:
Hydrocarbons are classified in to Unsaturated and Saturated classes.
Saturated Compounds:
These are those organic compounds which has only single bonds between the carbon atoms. For example, Alkane are the saturated compounds. The Carbon atom in these compounds are Sp³ hybridized and the geometry along carbon atom is tetrahedral.
Unsaturated Compounds:
These are those organic compounds which has either a double bond (alkenes) or triple bonds (alkynes) between the carbon atoms. The Carbon atom in alkenes is Sp² hybridized and the geometry along carbon atom is triangular while, The Carbon atom in alkynes is Sp hybridized and the geometry along carbon atom is linear.
The reaction in which alkanes (saturated) compounds are converted into alkenes are called as dehydrogenation reactions while, the reactions in which the unsaturated compounds (alkene and alkyne) are converted into saturated compounds are called as hydrogenation or reduction reactions. Hence, we can conclude that the dehydrogenation of alkanes results in the formation of unsaturated compounds.
Answer:true
Explanation: alkenes has a double bond
Condensation
Which part of the diagram shows this interaction?
hydrosphere - atmosphere
O evaporation
Precipitation
Snow
Rain
groundwater
precipitation
surface runoff
Evaporation
Surface runoff
Groundwater
Answer:
A
Explanation:
Answer:
Evaporation
Explanation:
I just took the quiz
2H2 + O2 --> 2H2O
How many grams of oxygen gas are required to produce 90. g of water?
Answer:
80g
Explanation:
2H2 + O2 —> 2H2O
MM of H2O = (2x1) + 16 = 2 + 16 = 18g/mol
Mass conc. of H2O from the balanced equation = 2 x 18 = 36g
MM of O2 = 16 x 2 = 32g/mol
From the equation,
32g of O2 reacted to produce 36g of H2O.
Therefore Xg of O2 will react to produce 90g of H2O i.e
Xg of O2 = (32x90)/36 = 80g
What is the contrast of these two atoms?
Answer:
The atomic number of silicon is 14 while atomic mass of carbon is 14.
Explanation:
An atom consist of electron, protons and neutrons. Protons and neutrons are present with in nucleus while the electrons are present out side the nucleus.
All these three subatomic particles construct an atom. A neutral atom have equal number of proton and electron. In other words we can say that negative and positive charges are equal in magnitude and cancel the each other. For example if neutral atom has 6 protons than it must have 6 electrons. The sum of neutrons and protons is the mass number of an atom while the number of protons are number of electrons is the atomic number of an atom.
In given atoms ¹⁴₆C and ²⁸₁₄Si the atomic mass of carbon is 14 while the atomic number of silicon is 14. It means silicon has 14 electrons or protons while carbon has 6 protons or electrons because its atomic number is 6. Carbon has 6 protons and 8 neutrons in its nucleus while silicon has 14 protons and 14 neutrons in its nucleus.
In C:
Number of neutrons + protons = 8 + 6 = 14 amu (mass number)
Number of electrons = 6
In Si:
Number of neutrons + protons = 14 + 14 = 28 amu (mass number)
Number of electrons = 14
How much energy is required to raise the temperature of 3 kg of aluminum
from 18°C to 23°C? Use the table below and this equation: Q = mcAT.
Substance Specific Heat Capacity (1/(°C))
Liquid water
4.186
Ice
2.11
Air
1.00
Aluminum
0.897
Soil
0.80
Granite
0.790
Iron
0.450
Copper
0.385
Silver
0.233
Lead
0.129
O
A. 13,455 J
O
O
B. 2691 J
C. 13,455 J
OD. 4.485 J
Answer:
Explanation:
Q = mcAT= should be mc(T2-T1)
for Aluminum
Q = 3 1000g Al x(0.897J/gC x(23-18 C)= 16722 J
The correct answer is 13,455
The energy required to raise the temperature is :-[tex]Q=mc[/tex]Δ[tex]T[/tex]
[tex]Q=3*1000*0.897*(23-18)[/tex] [tex]Q=3000*0.897*5\\Q=3*897*5\\Q=13,455[/tex]What is meant specific heat?
Specific heat, the quantity of heat required to raise the temperature of one gram of a substance by one Celsius degree.
Does Aluminium have a high specific heat?
Aluminum also has a higher specific heat capacity, it takes more energy to raise a unit mass of aluminum by one degree Celsius than iron.
Learn more about specific Heat Capacity here: https://brainly.com/question/19053693
#SPJ2
Using the equation below, calculate the number of grams of CO that can react completely with 78.9 g Fe2O3
Fe2O3(s) + 3CO(g) → 2Fe(s) + 3CO2(g)
Answer:
41.51 g of CO
Explanation:
The balance chemical equation for given double displacement reaction is,
Fe₂O₃ + 3 CO → 2 Fe + 3 CO₂
Step 1: Calculate moles of Fe₂O₃:
Moles = Mass / M.Mass
Moles = 78.9 g / 159.68 g/mol
Moles = 0.494 moles
Step 2: Calculate moles of CO:
According to equation,
1 mole of Fe₂O₃ reacted with = 3 moles of CO
so,
0.494 moles of Fe₂O₃ will react with = X moles of CO
Solving for X,
X = 0.494 mol × 3 mol ÷ 1 mol
X = 1.482 moles of CO
Step 3: Calculate Mass of CO as:
Mass = Moles × M.Mass
Mass = 1.482 mol × 28.01 g/mol
Mass = 41.51 g of CO
How many moles are in 5.25 L of oxygen gas as stp
Answer:
The correct answer is 0, 235 mol
Explanation:
We use the formula PV =nRT. The normal conditions of temperature and pressure are 273K and 1 atm, we use the gas constant = 0, 082 l atm / K mol:
1 atm x 5, 25l = n x 0, 082 l atm / K mol x 273 K
n= 1 atm x 5, 25l /0, 082 l atm / K mol x 273 K
n= 0, 235 mol
To calculate the number of moles of oxygen gas in 5.25 L at STP, divide the volume by the molar volume of a gas at STP, which is 22.4 L/mol. This results in approximately 0.2344 moles of oxygen gas.
Explanation:The student is asking about the number of moles of oxygen gas in 5.25 liters at standard temperature and pressure (STP). To find this, we use the concept of molar volume which states that one mole of any gas at STP occupies 22.4 liters.
We can set up a conversion factor to calculate moles from volume:
5.25 L O2 × (1 mol / 22.4 L)Dividing 5.25 liters by 22.4 liters per mole gives us:
5.25 L / 22.4 L/mol ≈ 0.2344 moles of O2
What is the chemical equation from table salt made from baking soda
NaHCO₃ + HCl → NaCl + H₂O + CO₂
Explanation:
NaHCO₃ + HCl → NaCl + H₂O + CO₂
When Sodium bi carbonate (NaHCO₃) reacts with hydrochloric acid (HCl), it forms table salt (NaCl), water ( H₂O ) and Carbon di oxide (CO₂) gas is evolved.
Here base reacts with acid to form salt and it is the neutralization reaction.