081 Mole Ratio and Mole-Mole Stoichiometry

Front

What is a mole ratio?

Back

A mole ratio is a ratio that shows the relative amounts of moles of reactants and products in a balanced chemical equation.

Front

How do you determine the mole ratio from a balanced equation?

Back

To determine the mole ratio, look at the coefficients in front of the chemical formulas in the balanced equation.

Front

Given the equation @@2HgO ightarrow 2Hg + O_2@@, what is the mole ratio of HgO to O_2?

Back

2:1

Front

In the reaction @@2Na + S ightarrow Na_2S@@, how many moles of Na are needed to produce 1 mole of Na_2S?

Back

2 moles of Na are needed to produce 1 mole of Na_2S.

Front

What is the mole ratio of Na to S in the reaction @@2Na + S ightarrow Na_2S@@?

Back

2:1

Front

In the reaction @@3H_2 + N_2 ightarrow 2NH_3@@, what is the mole ratio of H_2 to NH_3?

Back

3:2

Front

What is the total number of moles of S that reacts when 4.0 moles of Na are consumed in the reaction @@2Na + S ightarrow Na_2S@@?

Back

2 moles of S.

Front

In the reaction @@AlPO_4 + Ba(OH)_2 ightarrow Al(OH)_3 + Ba_3(PO_4)_2@@, what is the mole ratio of Ba(OH)_2 to AlPO_4?

Back

3 mol Ba(OH)_2 / 2 mol AlPO_4.

Front

What does a balanced chemical equation represent?

Back

A balanced chemical equation represents the conservation of mass, showing that the number of atoms of each element is the same on both sides of the equation.

Front

If 8.0 moles of Na are consumed, how many moles of Na_2S are produced in the reaction @@2Na + S ightarrow Na_2S@@?

Back

4 moles of Na_2S are produced.