Chemistry Spring Semester Exam Review

According to the Law of Conservation of Mass, the total mass of the reactants is

• always more than the total mass of the products

• always less than the total mass of the products

• always equal than the total mass of the products

• sometimes more and sometimes less than the total mass of the product

Tags

NGSS.HS-PS1-7

Classify the type of reaction for the following Chemical Reaction:

___ Mg + ___ N₂ ---> ___ Mg₃N₂

• Synthesis

• Decomposition

• Single Replacement

• Double Replacement

• Combustion

What are the correct coefficients for the equation below?

___ Mg + ___ N₂ ---> ___ Mg₃N₂

• 1, 2, 5

• 3, 1, 1

• 3, 0, 0

• 6, 2, 2

• 3, 2, 3

Classify the type of reaction for the following Chemical Reaction:

___ NaNO₃ → ___ NaNO₂ + ___ O₂

• Synthesis

• Decomposition

• Single Replacement

• Double Replacement

• Combustion

What are the correct coefficients for the equation below?

___ NaNO₃ → ___ NaNO₂ + ___ O₂

• 2, 2, 1

• 2, 1, 3

• 1, 1, 2

• 3, 1, 3

• 2, 2, 0

Tags

NGSS.HS-PS1-7

What is true about Molar Mass?

• It is the mass of one mole of any substance.

• Molar Mass is the mass of all of the large, flat teeth at the back of your mouth.

• It refers to the weight of volcanic rocks.

• It is the concentration of a solution of salt water.

Tags

NGSS.HS-PS1-7

The number of atoms in 1 mole of carbon is

• 5.022 x 10²³ atoms

• 6.022 x 10²³ atoms

• 6.022 x 10²¹ atoms

• 5.022 x 10²² atoms

What is the molar mass of carbon?

• 0.125 mole

• 2.49 x 10^-24 mole

• 12.01 g/mol

• 44.01 g/mol

What is the molar mass of KBr?

• 119.0 g/mol

• 178.013 g/mol

• 39.098 g/mol

• 79.904 g/mol

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-7

2 Fe + 3 H₂SO₄ → 1 Fe₂(SO₄)₃ + 3 H₂

In the equation above, what is the mole ratio for Fe and H₂?

• 1 mol Fe : 1 mol H₂

• 3 mol Fe : 1 mol H₂

• 3 mol Fe : 3 mol H₂

• 2 mol Fe : 1 mol H₂

• 2 mol Fe : 3 mol H₂

Tags

NGSS.HS-PS1-7