Chapter 12 Stoichiometry

What is the mole ratio of H2O to H3PO4 in the following chemical equation?

• 1 to 6

• 3 to 2

• 4 to 6

• 2 to 3

Tags

NGSS.HS-PS1-7

• 2 : 1

• 1 : 1

• 3 : 2

• 6 : 8

• 1 : 3

• 2 : 3

• 1 : 1

• 3 : 2

Tags

NGSS.HS-PS1-7

For the reaction represented by the equation N_2+3H_{2 ightarrow ext{2NH}_3}, how many moles of nitrogen (N2) are required to produce 18 grams of ammonia (NH3)?

• 0.9 mol

• 18 grams

• 0.53 mol

• 36 grams

Tags

NGSS.HS-PS1-7

The most steps are required to solve stoichiometry problems when the reactant is given in grams and the product is sought in

• moles.

• grams.

• liters.

• number of atoms.

Tags

NGSS.HS-PS1-7

For the reaction represented by the equation Pb\left(NO_3\right)_2+2KI\ \rightarrow\ PbI_2+2KNO_3 how many moles of lead iodide \left(PbI_2\right) are produced of 300 grams potassium iodide \left(KI\right) when Pb\left(NO_3\right)_2 is in excess?

• 114.78 mol PbI₂

• 0.904 grams PbI₂

• 0.904 mol PbI₂

• 114.78 grams PbI₂

Tags

NGSS.HS-PS1-7

• 408 g KClO₃

• 804 g KClO₃

• 598 g KClO₃

• There is not enough information.

Mole ratios are obtained from the

• balanced chemical equation

• periodic table

• molar mass

In the reaction 2 H₂ + O₂ → 2 H₂O what is the mole ratio of oxygen to water

• 1/2

• 2/1

• 3/4

• 4/3

Tags

NGSS.MS-PS1-5

N₂ +  3H₂ → 2NH₃ 
How many moles of hydrogen are needed to react with 2 moles of nitrogen?

• 6

• 2

• 3

• 1

Tags

NGSS.MS-PS1-5