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4 years ago

How many moles of sodium, in 2.0 moles of sodium sulfate? Show all the work.

1 answer:

7 0

4 moles of sodium because you originally have 2.0 moles of Na2SO4 and you set that up at the beginning of the (what we called) train tracks. Then diagonally from that, on the bottom you put 1 mol of Na2SO4 to cancel the units. Then above that you have 2 moles of sodium because that is how many there are in the equation that they gave (the Na2 part). Then its just like a fraction, you multiply the top by the top and the bottom by the bottom, which would give you 4moles/1 or just 4 moles Na. I hope that helps

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Balance the following equation:<br> MgO + HCl = MgCl2* + H2*O

kaheart [24]

<span>MgO + HCl = MgCl2* + H2*O

To balance an equation, you have to have both the reactants and products side equal.

Mg = 1 Mg = 1
H = 1 H = 2
Cl = 1 Cl = 2

MgO + 2HCl = MgCl2 + H2*O

We added the coefficient 2, so they could balance. </span>

3 0

4 years ago

Read 2 more answers

Select the correct answer. What is heat of vaporization? A. It is the heat required to change a substance’s temperature by 1°C.

Luba_88 [7]

D. It is the heat required to change a gram of substance from a liquid to a gas.

Explanation:

The heat of vaporization is the heat required to change a gram of substance from a liquid to a gas.

It is also known as the enthalpy of vaporization.
The heat of vaporization is the quantity of heat needed to change one gram of a substance from liquid to gas.
This heat of vaporization is dependent on the pressure conditions the process is taking place.
Different liquids have their heat of vaporization.

learn more:

Heat of vaporization brainly.com/question/9529654

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7 0

3 years ago

Write the stracture of 2,2-dimetyl butane

Mice21 [21]

Answer:

Explanation:

Let's break it down:

Butane- A 4 carbon alkane
Methyl - A CH₃ group
2,2 - Both the Methyl groups are attached at carbon 2

We can now draw the structure of 2,2-dimethyl butane using the following steps:

Draw the backbone (butane)
Draw the substituents (2 methyl groups at carbon 2)

6 0

3 years ago

Question 1

const2013 [10]

1. An ionic bond is an attraction between oppositely charged ions. A covalent bond is sharing of electrons between atoms.

2. A bond between two atoms

3. covalent bond

4. They have different properties because the arrangement of atoms is different.

5. Mutual attraction between the nuclei and electrons in two different atoms

5 0

3 years ago

the molecular weight of the nitrous oxide is 44.013 g/mol. assuming standard temperature and pressure, what would be the volume,

allsm [11]

The volume of the nitrous oxide gas is 1729.3 Liters

<h3>What is the number of moles of gas present in 3.40 kg of nitrous oxide?</h3>

The number of moles of gas present in 3.40 kg of nitrous oxide is determined from the formula below:

Numbers of moles = mass/molar mass

the mass of nitrous oxide = 3.40 kg or 3400 g

the molar mass of nitrous oxide = 44.013 g/mol

Moles of gas = 3400 / 44.013

Moles of gas = 77.25 moles

Using the ideal gas equation to determine the volume of the gas:

PV= nRT

V = nRT/P

where;

V is the volume of gas
n is the number of moles of gas
R is molar Gas constant = 0.082 L.atm/mol/K
T is the temperature of the gas

V = 77.25 * 0.082 * 273 / 1

The volume of the gas = 1729.3 Liters

Learn more about ideal gas equation at: brainly.com/question/20212888

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3 0

1 year ago