WORKSHEET stoic

Question

____ CH4+___O2---->____CO2+____H2O

1)How many moles of oxygen gas are needed to produce 2.14 moles of water?

Anewer ____ mol

2) How many moles of oxygen can be formed from 67 grams of carbon dioxide?

Answer____ mol

3) How many grams carbon dioxide can be formed from 29 grams of methane (carbon tetrahidride)

Anewer____ grams

Answer 1

Balanced equation: CH₄ + 2O₂ = CO₂ + 2H₂O

1)

2.14 mol H₂O x (2 mol O₂/2 mol H₂O) = 2.14 mol O₂

2.14 moles of oxygen gas are needed to produce 2.14 moles of water due to the 2/2 molar ratio.

2)

67g CO₂ x (1 mol CO₂ / 44.01g CO₂) = 1.52 mol CO₂

1.52 mol CO₂ x (2 mol O₂ / 1 mol CO₂) = 3.04 O₂

3.04 moles of oxygen can be formed from 67 grams of carbon dioxide because of the 2/1 molar ratio.

3)

29g CH₄ x (1 mol CH₄ / 16.04g CH₄) = 1.81 mol CH₄

1.81 mol CH₄ x (1 mol CO₂ / 1 mol CH₄) = 1.81 mol CO₂

1.81 mol CO₂ x (44.01g CO₂ / 1 mol CO₂) = 79.66 g CO₂

79.66 grams of carbon dioxide can be formed from 29 grams of methane (carbon tetrahydride).