Test Review

Front

What is the coefficient needed to balance the equation NH₃ + H₂SO₄ → (NH₄)₂SO₄?

Back

2

Front

What is the name of the binary compound FS₃?

Back

Fluoride trisulfide

Front

Does changing the shape of an object using heat result in a chemical reaction?

Back

No because we are not producing a new substance.

Front

What is the molar mass of Ca(OH)₂?

Back

74 g/mol

Front

What coefficient should be placed in front of Lithium to balance the equation AlCl₃ + Li → LiCl + Al?

Back

3

Front

What is a coefficient in a chemical equation?

Back

A number placed in front of a compound to indicate how many molecules are involved in the reaction.

Front

What is the difference between a physical change and a chemical change?

Back

A physical change does not produce a new substance, while a chemical change does.

Front

How do you calculate the molar mass of a compound?

Back

Add the atomic masses of all atoms in the compound's formula.

Front

What is the formula for calculating the molar mass of H₂SO₄?

Back

(2*1) + (32) + (4*16) = 98 g/mol.

Front

What is the significance of balancing chemical equations?

Back

It ensures that the law of conservation of mass is obeyed.