Which of the following contains the most atoms?

2 moles of silver.



1 mole of carbon.

2.5 moles of oxygen.


1.5 moles of iron.

Answer:

5.875 g of Oxygen

Explanation:

We must first balance our decomposition equation KClO3 -> K + ClO3

The amount of oxygen in CLO3 is 3 times the original. We begin by converting 15g of KClO3 to moles. 15 / (39.1 + 35.45 + 3(16) ) = 0.122 mols.

Then we go to moles of oxygen,

.122 * 3 = 0.367 mols of Oxygen

Then to grams of Oxygen

.367 * 16 = 5.875 g

Answer: C i believe

Explanation: Common sense

Answer:

__3__parasitism-Ticks can attach to the skin of humans or other mammals.  The ticks feed on the blood to grow.

__1__mutualism-Nitrogen-fixing bacteria get a place to live and food in the roots of plants while helping the plant.

__2__commensalism-Bromeliads are plants that live in the tall trees in the rainforest. The tree is not harmed by them.

Explanation:

The word that describes each statement would be mutualism, commensalism, and parasitism respectively.

It is a form of interaction involving two organisms of different species.

There are different types of symbiotic interactions:

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Answer:

10.1 M

Explanation:

Applying,

pH = -log(H⁺).................... Equation 1

But,

[H⁺][OH⁻] = 1×10⁻¹⁴................ Equation 2

Where [H⁺] = Hydrogen ion concentration, [OH⁻] = Hydroxyl ion concentration.

From the question,

Given: [OH⁻] = 1.25×10⁻⁴ M

Substitute into equation 2

[H⁺][1.25×10⁻⁴] = 1×10⁻¹⁴

[H⁺] = 1×10⁻¹⁴/1.25×10⁻⁴

[H⁺] = 0.8×10⁻¹⁰ M

[H⁺] = 8×10⁻¹¹ M

Also, Substitute the value of [H⁺] into equation 1

pH = -log[8×10⁻¹¹]

pH = 10.1 M

Answer:

explotion and bitly coin download

Explanation:

i record it

If we view a new moon tonight, 4 weeks will pass before we view a full moon. The sole natural satellite of Earth is the Moon.

The sole natural satellite of Earth is the Moon. With a diameter that is around one-fourth that of the Earth, it's the fifth biggest satellite inside the solar system as well as the largest and also most massive when compared to its parent planet. The Moon is larger than any other dwarf planets of a Solar System and belongs to a planetary-mass body with a distinct rocky body, rendering this a satellite planet according to geophysical interpretations of the term.

There isn't much of an atmosphere, hydrosphere, and magnetic field there. With a surface gravity of 0.1654 g, it has a gravity that is around one-sixth that of Earth. Jupiter's moon Io is the only satellite inside the Solar System that is documented to have a higher gravity and density. If we view a new moon tonight, 4 weeks will pass before we view a full moon.

Therefore,  if we view a new moon tonight, 4 weeks will pass before we view a full moon.

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Answer:

Electron loss is always associated with an increase in oxidation number- True

An exothermic reaction occurs when the energy required to break bonds in reactants is less than the energy released by bond formation in the products.  True

The concentrations of pure liquids and pure solids are never included in an equilibrium constant expression because such concentrations never change. True

Explanation:

Oxidation implies loss of electrons. When a specie looses electrons, its oxidation number increases. For instance; Fe(s) -----> Fe^2+(aq) + 2e implies an increase in oxidation number of Fe from 0 to +2.

In an exothermic reaction, the energy required to break the bonds in the reactants is less than the energy released when new bonds form in the products.

We do not include the concentrations of pure liquids and pure solids in the equilibrium constant expression because the concentration of these do not change significantly throughout the reaction.

Answer:

planet A: Saturn

planet B: Mars

planet C: Venus

planet D: Uranus

Explanation:

Answer:

A is Saturn

B is Mars

C is Venus

D is Neptune

Explanation: Saturn is known for its rings and it's the 6th planet on the Solar System. Mars is indeed quite red and it is in the inner comet belt

C is Venus because a day is longer than a year on Venus and D is Neptune because it's a blue and green gas giant.

Answer:

A

Explanation:

A catalyst speeds up a reaction by lowering the required activation energy, so it's not B. Like previously stated, the catalyst lowers the activation energy required, so it's not C either. This leaves us with A. Just to double check, does a catalyst speeds up a reaction? Yes! So like it says in A, a catalyst causes the equilibrium to be reached faster. Have a nice day! :)

Catalysts speed up a chemical reaction by causing equilibrium to reach quickly while maintaining the equilibrium's position. Thus, option A is true.

A catalyst increases the reaction rate by decreasing the activation energy of the reaction. As the minimum energy required by the reactants for the reaction is decreased the rate of the formation of products increases.

During the reaction, the catalyst remains unchanged and does not undergo any chemical change. It can increase the reaction rate of both irreversible and reversible reactions.

In an equilibrium reaction, the catalyst can increase the rate of both forward and reverse reaction by reaching the reaction equilibrium at a faster rate and can move the reaction toward the products as well as a reactant.

Therefore, the catalyst causes equilibrium to be reached faster.

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Answer:

the state or quality of a material or membrane that causes it to allow liquids or gases to pass through it.

Answer:

Explanation:

Answer: D

STRONG ACIDS:

HBr

HCl

HI

HNO3

HClO4

H2SO4

Answer:

A

Explanation:

It's not moving so it would be going 0 meters per second

Answer:

I think its A

Explanation:

Answer:

7.97 moles

Explanation:

The number of moles (n) of iron (Fe) in this question can be calculated by dividing its number of atoms by Avogadro's number (6.02 × 10²³ atoms).

That is;

n = number of molecule ÷ Avogadro's number

According to this question, the number of atoms of Fe is given as 4.8 x 10²⁴ atoms.

Hence,

n = 4.8 x 10²⁴ ÷ 6.02 × 10²³

n = 4.8/6.02 × 10^(24-23)

n = 0.797 × 10¹

n = 7.97 moles

Answer:

Family is defined as a specific group of people that may be made up of partners, children, parents, aunts, uncles, cousins and grandparents. An example of a family is a set of parents living with their children. The definition of family is the group of people who share common ancestors.

Family is very important part of our everyday life. It helps us in improving our personality. It also helps us in shaping our life. It teaches us the value of love, affection, care, truthfulness and self-confidence and provides us tools and suggestions which are necessary to get success in life.  Family is a place where you can be yourself. It is a place where you are accepted for what you are. This is where you are completely tension free and everyone is there to help you. Family encourages you when you are surrounded by problems. It helps you survive through tough times and bring joy and happiness into life.

Answer:

You can make 149.1g of KCl

Explanation:

1 mole of potassium chloride, KCl, contains 1 mole of potassium, K. That means, with 2.000 moles of K we can make 2.000 moles of KCl. To solve this question we must convert these moles of KCl to mass in grams using its molar mass (Molar mass KCl = 74.5513g/mol):

Mass KCl:

2.000 moles KCl * (74.5513g / mol) =

Answer:

CIF3

Explanation:

Edge completion

Answer:

✔ octane

CH3CH2CH2CH2CH2CH2CH2CH3

✔ butane

CH3CH2CH2CH3

✔ methane

CH4

✔ decane

CH3CH2CH2CH2CH2CH2CH2CH2CH2CH3

✔ ethane

CH3CH3

Explanation:

An alkane contains only carbon and hydrogen. The following are the accurate names of the compounds;

An alkane is a compound whose only functional group is the carbon - carbon single bond. This compounds contain only carbon and hydrogen.

The correct names of the compounds are;

CH3CH2CH2CH2CH2CH2CH2CH3 - octane

CH3CH2CH2CH3 - butane

CH4 - methane

CH3CH2CH2CH2CH2CH2CH2CH2CH2CH3 - decane

CH3CH3 - ethane

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Answer:

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Answer:

The compound with the correct formula is;

A. MNO₃

Explanation:

The number of oxidation states in the metal, M = One oxidation state

The formula of the compound formed by the metal, M = MHCO₃

We note that the ion HCO₃⁻, known as hydrogen carbonate has an oxidation number of -1

Similarly nitrate, NO₃⁻ has an oxidation number of -1, therefore, the metal M can form similar compound formed with HCO₃⁻ with nitrate, and we have;

The possible compounds formed by the metal 'M' includes MHCO₃ and MNO₃.

Answer:

"ite"

Explanation:

Se sabe que los elementos del grupo 16 de la tabla prioritaria muestran estados de oxidación o valencias de 2,4 y 6 respectivamente, dependiendo del compuesto formado.

Por ejemplo, el azufre forma los siguientes compuestos;

sulfato de sodio (el azufre tiene una valencia de 6)

Sulfito de sodio (el azufre tiene una valencia de 4)

Sulfuro de sodio (el azufre tiene una valencia de 2)

Por lo tanto, en compuestos en los que exhiben una valencia de 4, la terminación común es "ite"

Answer:

ite

Explanation:

Hope this helps

Answer:

The answer is D

Explanation:

All the other options are associated with chemical change

Answer:

D

Explanation:

when we say phisical change it is change of phisical so it does not change the composition because when we say it alther the composition it will be chemical change.

Answer: There are [tex]27.701 \times 10^{23}[/tex] molecules in 4.6 moles of ammonium nitrate [tex](NH_{4}NO_{3})[/tex].

Explanation:

According to the mole concept, there are [tex]6.022 \times 10^{23}[/tex] molecules present in 1 mole of every substance.

Hence, the number of molecules present in 4.6 moles of ammonium nitrate are calculated as follows.

[tex]4.6 \times 6.022 \times 10^{23}\\= 27.701 \times 10^{23} molecules[/tex]

Thus, we can conclude that there are [tex]27.701 \times 10^{23}[/tex] molecules in 4.6 moles of ammonium nitrate [tex](NH_{4}NO_{3})[/tex].

Answer:

b

Explanation:

Answer:

it is j.

Explanation:

Answer:

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• Urbanista (incluyendo geógrafo)

• Zoologísta

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Explanation:

Answer:

Is there a picture To go with this?

Explanation:

Answer:

Part A

pH ≈ 2.273

Part B

ΔpH ≈ -4.726

Part C

pH ≈ 1.973

Part D

ΔpH ≈ -0.301

Explanation:

Part A

The pH of a solution is given by the negative concentration of hydrogen ions in the solution

2.0 mL = 0.002 L

The number of moles of HCl in 2.0 mL of 4.0 M HCl is given as follows;

1 Liter of 4.0 M HCl contains 4.0 moles of HCl

2.0 mL = 0.002 L 4.0 M HCl contains 0.002 L/(1 L) × 4.0 M = 0.008 moles of HCl

The concentration of 0.008 moles in 1.50 L is given as follows;

Concentration = The number of moles/(The volume in liters)

∴ The concentration of 0.008 moles in 1.50 L, C = 0.008 moles/(1.5 L + 0.002 L)

∴ The concentration of 0.008 moles in 1.50 L, C ≈ 0.00533 moles/liter = 0.00533 M HCl

Given that HCl is a strong acid, we have that HCl dissociates completely to give equal number of H⁺ and Cl⁻ ions;

The number of moles of [H⁺] in the solution = 0.00533 moles

The pH of the solution = -log[H⁺]

∴ pH = -log[5.33 × 10⁻³] ≈ 2.273

The pH of the 1.5 L of pure water will be approximately 2.273

Part B

The pH of the pure water has changed from neutral (pH = 7) tp pH = 2.273

The change in pH is ΔpH = 2.274 - 7 = -4.726

ΔpH ≈ -4.726

Part C

When 2.0 mL of the 4.0 M HCl is added, the solution above, we have;

C = (0.008 + 0.008)/(1.5 + 0.002 + 0.002) ≈ 1.06383 × 10⁻²

The concentration of the solution becomes, C ≈ 1.06383 × 10⁻² mole/liter

The pH becomes, pH = -log(1.06383 × 10⁻²) ≈ 1.973

Part D

The amount by which the pH has changed, ΔpH ≈ 1.973 - 2.274 = -0.301.