Stoichiometry

When the following equation is balanced what are its coefficients in simplified form?

__C8H18 + __O2 → __CO2 + __H2O

• 1,12.5,8,9

• 1,12,8,9

• 2,25,16,18

• 1,1,8,18

Tags

NGSS.HS-PS1-7

The __________ in a balanced equation reveals the mole ratios of the substances involved.

• subscript

• coefficients

• superscript

• total number in each compound

The combustion of a sample of butane, C4H10 (lighter fluid), produced 2.46 grams of water.

2 C4H10 + 13O2 -------> 8CO2 + 10H2O

How many moles of water formed?

• 0.137 mol

• 44.28 mol

• 0.027

• 0.685

Tags

NGSS.HS-PS1-7

The combustion of a sample of butane, C4H10 (lighter fluid), produced 2.46 grams of water.

2 C4H10 + 13O2 -------> 8CO2 + 10H2O

How many moles of butane burned?

• 0.137 mol

• 0.027 mol

• 0.042 mol

• 0.27 mol

Tags

NGSS.HS-PS1-7

The combustion of a sample of butane, C4H10 (lighter fluid), produced 2.46 grams of water.

2 C4H10 + 13O2 -------> 8CO2 + 10H2O

How many grams of butane burned?

• 713.4 gram

• 0.042 gram

• 1.57 gram

• 7.13 gram

Tags

NGSS.HS-PS1-7

The combustion of a sample of butane, C4H10 (lighter fluid), produced 2.46 grams of water.

2 C4H10 + 13O2 -------> 8CO2 + 10H2O

How much oxygen was used up in moles?

• 0.178 mol

• 0.137 mol

• 3.20 mol

• 0.355 mol

The combustion of a sample of butane, C4H10 (lighter fluid), produced 2.46 grams of water.

2 C4H10 + 13O2 -------> 8CO2 + 10H2O

How much oxygen was used up in grams?

• 2.85 gram

• 5.70 gram

• 4.38 gram

• 2.19 gram

When 4.7 x 10^11 atoms of sodium are put into excess water, how many grams of NaOH are made?

Reaction: Na + H2O → NaOH + H2

• 1.13 x 10^46 gram

• 1.13 x 10^-11 gram

• 3.12 x 10^-11 gram

• 6.02 x 10^23 gram

If 56 grams of calcium metal are dropped into hydrochloric acid, how many liters of gas are made?

Reaction: Ca + HCl → CaCl2

• 1.4 L

• 100 L

• 22.4 L

• 31.36 L

Using the following equation:

2 NaOH + H2SO4 → 2 H2O + Na2SO4

How many liters of sodium sulfate will be formed if you start with 2 moles of sodium hydroxide and you have an excess of sulfuric acid?

• 0.045 L

• 44.8 L

• 89.6 L

• 22.4 L

Tags

NGSS.HS-PS1-7