Question

How many grams of carbon dioxide are produced by the combustion of 2.5 moles of ethane gas, C 2 H 6 at standard conditions?

2 C 2 H 6 (g)+7 O 2 (g) 4 CO 2 (g)+6 H 2 O (g)

Answer 1

220g

Step-by-step explanation:

The reaction equation is given as:

2C₂H₆ + 7O₂ → 4CO₂ + 6H₂O

Number of moles of ethane gas = 2.5moles

To find the mass of CO₂ produced, we need to know the number of moles of the compound produced;

2 mole of ethane gas produced 4 moles of CO₂

2.5 moles of ethane gas will produce
`(2.5 x 4)/(2)` = 5mole of CO₂

So;

Mass of CO₂ = number of moles x molar mass

Molar mass of CO₂ = 12 + 2(16) = 44g/mol

Mass of CO₂ = 5 x 44 = 220g