Answer:
Three chlorine ions
Explanation:
Which phrase describes radiation?
A.the process in which energy is released by molecules breaking apart
B.transfer of heat between two objects that are touching
C.transfer of heat by the actual movement of warmed matter
D.the process in which energy is emitted by one object, transmitted through space, and absorbed by another
Explanation:
The correct option in the given statement is option (d).Radiation is a process in which the transfer of energy is in the form of heat, and light and is emitted from one object or material and transmitted through the surroundings and then absorbed by another medium.Radiation occurs when their is a difference between the temperature of two medium or phases.Answer: D
Explanation:
When do dorbitals start getting filled?
A. After the s orbital of the next highest energy level
B. After the sorbital of the same energy level
c. After the p orbitals of the next highest energy level
D. After the porbitals of the same energy level
Answer:
A, tho I'm not completely sure.
Maybe this will help (picture)
D orbitals start getting filled after the s orbital of the next highest energy level. This is due to the Aufbau principle which mandates that orbitals are filled in order of increasing energy levels. Even if 4s has a higher quantum number than 3d, it gets filled first due to its lower energy.
Explanation:In atomic structure, d orbitals start getting filled after the s orbital of the next highest energy level. Each energy level in an atom has different types of orbitals - s, p, d, and f. The filling of these orbitals follows the Aufbau principle which means 'building up' in German. This principle essentially mandates that electrons fill up orbitals in order to increase energy levels.
The order of filling starts with the 1s orbital, then 2s, 2p, 3s, 3p, 4s and then the 3d orbitals. Thus, before the d orbitals start getting filled up, the s orbital of the next higher energy level (4s in this case) gets filled. It's important to note that despite 4s having a higher principal quantum number (n=4) than 3d (n=3), 4s has a lower energy and fills up before 3d.
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Which supernatural element is emphasized?
O A. Goblin
O B. Ghost
O
c. Prophecy
D. Angel
O
Without additional context, it is difficult to determine which supernatural element is emphasized. In literature, each element typically has a distinct significance that contributes to the plot's development.
Explanation:To ascertain which supernatural element is emphasized, we need additional context from the text or material being discussed. Generally, in literature, supernatural elements like ghosts, prophecies, goblins, and angels serve to create a sense of mystery or to advance the plot. Each element has its own typical significance: a ghost might represent unresolved issues from the past, a prophecy could foreshadow future events, a goblin often adds a touch of mischief or terror, and an angel could symbolize guidance or protection.
Which is the best description of a molecule?
A molecule of an element is composed of at least two types of atoms.
O Amolecule of a compound is composed of only one type of atom.
O Amolecule of a compound is composed of at least two types of atoms.
A molecule of an element is composed of exactly two types of atoms.
A molecule of a compound is composed of at least two types of atoms.
Explanation:
A molecule is defined as when two or more atoms of an element combine together by the bonds by sharing the electrons as O^2 (oxygen molecule)
A compound is a molecule when two different types of atom joined by chemical bonds as covalent, ionic or coordinate bonds as NH^3 ( ammonia)
Answer:
C- A molecule of a compound is composed of at least two types of atoms
Explanation:
just did the quiz
9.87 g of calcium sulfate and 12.05 g of potassium react. What is the total amount of potassium sulfate that can be produced?
Answer:
Mass of K₂SO₄ = 12.633 g
Explanation:
The balance chemical equation for given reaction is as;
CaSO₄ + 2 K = K₂SO₄ + Ca
To solve this reaction one should first find the limiting reagent. To do so e will calculate the moles of each reactant as,
Moles of CaSO₄ = Given Mass / M.Mass of CaSO₄
Moles of CaSO₄ = 9.87 g / 136.14 g/mol
Moles of CaSO₄ = 0.0725 moles
Similarly for K,
Moles of K = Given Mass / A.Mass of K
Moles of K = 12.05 g / 39.10 g/mol
Moles of K = 0.308 moles
Now, according to equation,
1 mole of CaSO₄ reacts with = 2 moles of K
So,
0.0725 moles of CaSO₄ will react with = X moles of K
Solving for X,
X = 0.0725 moles × 2 moles / 1 mole
X = 0.145 moles of K
As calculated above, we are provided with 0.308 moles of K while, we require only 0.145 moles of it so it means that K is in excess and CaSO₄ is the limiting reagent hence, CaSO₄ will control the yield of K₂SO₄.
So,
The amount of K₂SO₄ produced is calculated by first finding its moles as,
According to equation,
1 mole of CaSO₄ produced = 1 mole of K₂SO₄
So,
0.0725 moles of CaSO₄ will produce = X moles of K₂SO₄
Solving for X,
X = 0.0725 moles × 1 mole / 1 mole
X = 0.0725 moles of K₂SO₄
Now convert moles of K₂SO₄ to mass as,
Mass of K₂SO₄ = Moles × M.Mass
Mass of K₂SO₄ = 0.0725 × 174.26 g/mol
Mass of K₂SO₄ = 12.633 g
How many moles of Lithium oxide will form if 2.0 moles of Lithium reacts?
Li + O2 → Li2O
Answer:1 mole Li2O
Explanation: Solution attached
First balance the given chemical equation
4 Li + O2 => 2 Li2O
The stoichiometric factor of Li and Li2O is 4 moles Li and 2 moles Li2O
Solution:
2 moles Li x 2 moles Li2O / 4 moles Li
= 1 mole Li2O
a. Electrons have a charge of_____
b. Protons have a charge of_____
c. Neutrons have a charge of_____
Answer:A. Negative B. Positive C. Neutral or 0
Explanation: Electrons carries a negative charge and protons are apositively charge subatomic particles. Neutrons exhibits a neutral or 0 charge.
The table below gives the numbers of protons, electrons, and neutrons in four atoms.
Atom
Number of protons
Number of electrons
Number of neutrons
52
(39
39
12
40
40
bo
40
140
Based on the information that is given, which atom in the table has the highest mass?
0
1
O 2
04.
Mark this and return
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Answer:
it is b
Explanation:
Which of the following is an example of a mixture?
A.
the atmosphere
B. water
C.
calcium
D.
carbon dioxide
Answer:
The atmosphere
Explanation:
study island
NEED HELP ASAP!!!
If the temperature of a gas is increased by 4x, what will happen to the volume?
A. It will increase by 4x.
B. it will decrease by -4
C. It will increase +4
D. It will decrease 1/4.
If the pressure of a gas is decreased by 4x, what will happen to the volume?
A. It will increase by 4x.
B. it will decrease by -4
C. It will increase +4
D. It will decrease 1/4.
Answer:
c.
Explanation:
When the temperature of a gas increases by 4x, its volume will increase according to option A, by 4x as per Charles's law. Thus, correct option is A.
If the pressure of a gas is decreased by 4x, the volume will increase as per option A, by 4x as per Boyle's Law. Thus, correct option is A.
According to the ideal gas law (PV = nRT), when the temperature of a gas is increased, keeping other factors constant, its volume also increases proportionally. This is known as Charles's law. So, if the temperature is increased by 4 times, the volume will increase by 4 times as well.
Similarly, according to Boyle's law, when pressure decreases, volume increases proportionally. So, if the pressure is decreased by 4 times, the volume will increase by 4 times.
Therefore, the correct answers are A for both scenarios.
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1. What information is provided by atomic number, Z?
Answer: atomic number Z, gives the proton number of an element and it is unique for all elements ( i.e no two elements have the same atomic number or proton number) if the atom of the element is electrically neutral, the atomic number can also be the electron number
Explanation:
A compressed gas cylinder ar 135 atm and 23°C is in a room wheree a fire occurs the fire raises the temperature of the gas to 475°C. What is the new pressure in the cylindar
Answer: 341.15atm
Explanation:Please see attachment for explanation
The new pressure in the cylinder after the temperature increase to 475°C is approximately [tex]\( 341.53 \)[/tex] atm.
The new pressure of the gas cylinder after the temperature increase, we can use the combined gas law, which relates the initial and final states of a gas under changing conditions of temperature and pressure, assuming constant volume.
The combined gas law is given by.
[tex]\[ \frac{P_1 \cdot V_1}{T_1} = \frac{P_2 \cdot V_2}{T_2} \][/tex]
where.
[tex]- \( P_1 \) and \( T_1 \)[/tex] are the initial pressure and temperature.
[tex]- \( P_2 \) and \( T_2 \)[/tex] are the final pressure and temperature.
[tex]- \( V_1 \) and \( V_2 \)[/tex] are the initial and final volumes respectively assuming constant volume here.
Given.
- Initial pressure, [tex]\( P_1 = 135 \)[/tex] [tex]atm[/tex].
- Initial temperature, [tex]\( T_1 = 23 \) °C = \( 23 + 273.15 = 296.15 \)[/tex] K.
- Final temperature, [tex]\( T_2 = 475 \) °C = \( 475 + 273.15 = 748.15 \)[/tex] K.
We need to find [tex]\( P_2 \)[/tex], the final pressure.
First, let's rearrange the combined gas law to solve for [tex]\( P_2 \).[/tex]
[tex]\[ P_2 = \frac{P_1 \cdot T_2}{T_1} \][/tex]
Now, substitute the given values.
[tex]\[ P_2 = \frac{135 \cdot 748.15}{296.15} \][/tex]
Calculate [tex]\( P_2 \).[/tex]
[tex]\[ P_2 = \frac{101135.25}{296.15} \][/tex]
[tex]\[ P_2 \approx 341.53 \, \text{atm} \][/tex]
A sample of gold (Au) has a mass of 72.04 g. A) Calculate the number of moles of gold (Au) in the sample. Show your work please
A sample of gold (Au) has a mass of 72.04g. Calculate the number of atoms of gold (Au) in the sample. (Use your answer from Part A.) Show your work
Answer:
A. Number of moles, n = Reacting mass / Molecular mass
n = 72.04/ 196.966
n = 0.366 mole
Hence, the number of moles of gold (Au) in the sample is 0.366 mole
B. the number of atoms of gold (Au) in the sample is expressed as
= 0.366 * 6.03*∧1023
= 2.20698E35 atoms
Explanation:
56 Explain, in terms of atomic structure, why the elements in Group 2 have similar
chemical properties. 131
Elements in group 2 have similar chemical properties due to the same number of valence electrons.
Explanation:
These are also known as alkaline earth metals. The Group 2 elements are 6 in number. This is the second most reactive elements after the alkali metals of group1.
These are group 2 elements because they contain 2 electrons in their valence shell.
They can easily form compounds by ionic bonds.
The elements in Group 2 have similar chemical properties because they have the same number of valence electrons in their atomic structure.
Explanation:
The elements in Group 2, also known as the alkaline earth metals, have similar chemical properties due to their atomic structure. Each element in Group 2 has two valence electrons in its outermost energy level. This similarity in valence electron configuration means that these elements have similar tendencies to lose two electrons and form +2 ions. For example, beryllium, magnesium, and calcium all readily form +2 ions by losing their two valence electrons. This similarity in chemical properties is due to the fact that elements in the same group have the same number of valence electrons.
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Which container has gas stored at the highest temperature? 1 2 3 4
Answer: its 3
Explanation:
Answer:
3 has the highest temperature
Explanation:
Just took the test hope this helps. Leave a thanks please
Active
Primary productivity is not limited by
a. the availability of sunlight
b. time
c. the availability of nutrients
d. access to water
Please select the best answer from the choices provided
ОА
OB
Option B
Primary productivity is not limited by time
Explanation:
To ecosystems, the productivity of the primary producers is essential because certain bodies generate energy for different existence bodies. Besides the era, primary production ends in the extension of dissimilar plant biomass to the practice. Consumers acquire their strength from primary producers, unless directly (herbivores, any detritivores), or diffusely.
It depends superimposed on the availability of the sunlight, availability of the nutrients such as nitrogen, iron, phosphorus from the soil and water. The primary productivity of the plant's distinct autotrophs is not restricted by time.
Answer:
its b i did the test
Explanation:
What will be the amount of sugar in milligrams if the size of the milk chocolate bar is reduced from 11.630 g to 4.000 g ?
Express your answer in milligrams to four significant figures.
The amount of sugar in the milk chocolate bar, when reduced from 11.630 g to 4.000 g, would be approximately 3999 mg, assuming the sugar content scales directly with the weight of the chocolate bar.
Explanation:To determine the amount of sugar in milligrams when the size of the milk chocolate bar is reduced from 11.630 g to 4.000 g, we must understand that the question implicitly suggests a direct relationship between the chocolate bar's weight and its sugar content. Assuming the sugar content scales directly with the weight, we can use a proportion based on the known values, while ensuring that our final answer is expressed in milligrams (mg) and to four significant figures.
First, we need the original sugar content in milligrams for the 11.630 g chocolate bar. Without this specific information, let's assume that the entire mass is sugar for demonstration purposes: 11.630 g equals 11630 mg (since 1 g = 1000 mg). If the bar is reduced to 4.000 g and the sugar scales directly, the amount of sugar in the reduced bar can be calculated as follows:
Convert the reduced size of the chocolate bar into milligrams: 4.000 g = 4000 mg.To maintain proportion, (4000 mg / 11630 mg) × 100% = 34.39% of the original sugar content is present in the reduced size.The actual amount of sugar in the reduced size bar can then be calculated as 11630 mg × 34.39% = 3998.87 mg, rounded to four significant figures gives 3999 mg.A 12 g sample of P^4O^10 contains how many
molecules of phosphorus pentaoxide?
Answer:
molecules P4O10 = 2.546 E22 molecules
Explanation:
mol ≡ 6.022 E23 molecules∴ mass P4O10 = 12 g
∴ mm P4O10 = 283.886 g/mol
⇒ mol P4O10 = (12 g)×( mol/283.886 g) = 0.0423 mol P4O10
⇒ molecules P4O10 = (0.0423 mol P4O10)×(6.022 E23 molecules/mol)
⇒ molecules P4O10 = 2.546 E22 molecules
if i have 15.7g of sulfur, how do i work out how much iron is needed to make iron sulfide
Answer:
Mass = 27.4 g
Explanation:
Given data:
Mass of sulfur = 15.7 g
Mass of iron = ?
Solution:
Chemical equation:
Fe + S → FeS
Number of moles of sulfur:
Number of moles = 15.7 g/32 g/mol
Number of moles = 0.49 mol
Now we will compare the moles of sulfur with iron
S : Fe
1 : 1
0.49 : 0.49
Mass of iron:
Mass = number of moles × molar mass
Mass = 0.49 mol× 55.85 g/mol
Mass = 27.4 g
In a particular type of cat, coat color follows the dominant/recessive pattern of inheritance. The allele for a brown coat (B) is dominant to the allele for a white coat (b).
One of Mariam's cats is homozygous dominant (BB) and the other cat is heterozygous (Bb). Which of the following is true about Mariam's cats?
Answer:
even though I am missing the question I believe that the correct answer to the question is; his cats will be brown (Dominant)
Explanation:
this statement is true to the fact that on of his cats has the homozygous dominant gene BB. For their to be a chance of a white cat as an offspring both cats would either have to be Hetrozygous (Bb) or Homozygous recesssive (bb)
What does a chemical formula show you?
It shows how many atoms are in a element
A chemical formula shows you what a substance was made from. So like what elements are in it, and how many atoms of each element are in it.
For example: H20 has 2 atoms of hydrogen and 1 atom of oxygen.
Happy to help! :)
Which series of electromagnetic waves are in the correct order of longest to shortest wavelength?
Select ALL that apply.
a. infrared/visible light/ultraviolet
b. radio/microwave/infrared
c. ultraviolet/X rays/gamma
d. visible light/ultraviolet/radio
Answer:
It would be A, B, and C.
Explanation: This is because radio waves are the longest and gamma rays are the shortest wavelengths. Visible light is in between infrared and ultraviolet rays.
A(n)_____ is a bond that forms when electrons are transferred from one atom to another.
Help I need this by tmr
Answer: Ionic bond
Explanation: Ionic bonding is the transfer of electrons form least electronegative atom to a more electronegative one. Ionic bonds are commonly formed between a metal an electron donor and a non metal an electron acceptor. Since nonmetals have higher ionization energy and electronegativity electrons are transferred to them.
Answer:
Ionic bond
Explanation:
What is the main form of energy represented by each of the following?
A spring is compressed.
Oxygen bonds with carbon.
An electron generates an electric field.
A soccer ball rolls along the grass.
please help.
Answer:
1. Potential energy
2. Chemical energy
3. Electromagnetic energy
4. Kinetic energy
Answer:
1) potential energy 2) chemical energy 3) electromagnetic energy 4) kinetic energy
Explanation:
Just completed this question on my assignment. :)
What would happen if a spoin is placed in a cup of water?
Answer:
This time, a hot metal spoon is put in room-temperature water.
Explanation:
The faster-moving atoms in the spoon contact the slower-moving molecules in the water. The atoms in the spoon transfer some of their energy to the molecules in the water. The spoon will get cooler and the water will get a little warmer.
Answer:
This time, a hot metal spoon is put in room-temperature water. The faster-moving atoms in the spoon contact the slower-moving molecules in the water. The atoms in the spoon transfer some of their energy to the molecules in the water. The spoon will get cooler and the water will get a little warmer.
Edit: this is what i think
varies in a family on the periodic table.
Reactivity
Specificity
Answer:
reactivity
Explanation:
Answer:
reactivity is the answer
Explanation:
If 621000 Joules of energy are added to 3.30 Liters of water at 286 Kelvin what will the final temperature of the water be? Temperature in Kelvin
Answer:
Explanation:To convert from cal/(g*C) to J/(kg*K), we just need to find a conversion factor for specific heat. There is really no mathematical way to do this other than to look in a physics or chemistry book and find a conversion factor. After doing this, you will see that 1 cal/(g*C) is equal to 4,186 J/(kg*K).
To find the specific heat of a material, first look at the units. There is energy per unit mass per unit temperature. So if we are given an amount of energy appllied to an object, its mass and how much the temperature of the object rises, we can calculate its specifc heat by dividing the energy by both the mass and the temperature, but don't forget to keep the units as they are:
Specific heat of the metal = (95 cal)/(10 K * 700g) = 0.014 cal/(g*K)
To find how much energy it requires to melt 250 grams of ice, we will need what is called the Latent Heat of Melting for ice. This is the amount of heat required to change unit mass of a solid into unit mass of a liquid at a constant temperature. Again, using a reference, the latent heat of melting for ice is found to be 334 kJ/kg. So the energy required to melt one kg of ice is 334 kJ. The amount of energy required to melt 0.250 kg of ice is then:
334 * 0.250 = 83.5 kJ
Which anion testing solution produced the fewest (<3) precipitates? b) Salts of these anions may be described as soluble with few exceptions. Name the cations that are the exceptions to the rule for each anion identified in 3a
Answer:anions with least precipitates are anions of salt produce by a strong acid and strong base e.g KCL,Na2SO4,
Explanation: salts produce from strong acid such as HCL and a strong base such as KOH are extremely soluble and hence produce little or no precipitate when dissolved in water .meaning the salt are highly soluble , most group1 elements form salts that are highly soluble and hardly precipitates e.g Na(sodium) pottasium(K) ,lithium(Li)salts.they are called alkaline metals.
B) exception to the rules are hydrogen and Rubidium.hydrogen because it occurs basically as a gas and forms H^+ which tend to form a hydrogen bond while rubidium is a heavy metal forming insoluble salt
Which of these is an indication that a chemical reaction has occurred?
Select all that apply:
melting of a substance
boiling of a substance
formation of a new gas
formation of a precipitate
a new smell is given off
heat is released
Answer: Formation of a new gas
Formation of a precipitate
A new smell is given off
Heat is released
Explanation: A chemical reaction exhibits the following characteristics: formation of new substance, heat emission is an exothermic process which is due to chemical reactions
Precipitate formation occurs when insoluble substances are formed in an ionic compound solution.
And smells or odor are caused by the production of new substances.
which of the following chemical structures can form hydrogen bonds with water? Methane (CH4), molecular oxygen (O2), hydrogen sulfide. explain.
Answer:
Molecular oxygen and Hydrogen fluoride.
Explanation:
Definition:
Hydrogen bonding:
It is a type of dipole-dipole attraction between the hydrogen atom and more electronegative atoms.
In hydrogen bonding mostly the highly electronegative atoms are fluorine, nitrogen and oxygen.
Explanation:
In given compound such as methane CH₄ the electronegativity of carbon is 2.55 while that of hydrogen is 2.2 so there is smaller electronegativity difference that's why it can not form hydrogen bond.
In case of molecular oxygen the electronegativite atom oxygen is present. It can form hydrogen bonds with water. its electronegativity is 3.44.
In case of hydrogen fluoride the electronegativity atom fluorine is present. It will form hydrogen bonds with water. Its electronegativity is 3.98. So it is more likely to take part in hydrogen bonding.