Question

type the correct answer in the box. given: 8co + 17h₂ → c₈h₁₈ + 8h₂o in this chemical reaction, how many grams of h₂ will react completely with 6.50 moles of co? express your answer to three significant figures. grams of h₂ will react completely. reset next

Explanation:

Step1: Find mole ratio of H₂ to CO

From reaction: $\frac{n(\text{H}_2)}{n(\text{CO})} = \frac{17}{8}$

Step2: Calculate moles of H₂

$n(\text{H}_2) = \frac{17}{8} \times 6.50 = 13.8125$ mol

Step3: Calculate mass of H₂

Molar mass of H₂ is $2.016$ g/mol.
$m(\text{H}_2) = 13.8125 \times 2.016 = 27.846$ g

Step4: Round to 3 significant figures

$m(\text{H}_2) \approx 27.8$ g

Answer:

27.8