Question

Given the unbalanced reaction: P₄+ O₂
`\rightarrow` P₄O₁₀ How many moles of O₂ are needed to produce 14.2 grams of P₄O₁₀­?

a. 0.125 mol
b. 0.0620 mol
c. 0.500 mol
d. 0.0500 mol
e. 0.250 mol

Answer 1

The correct answer is option e.

Step-by-step explanation:

`P_4+ 5O_2 \rightarrow P_4O_(10)`

Moles of phosphorus pent-oxide :

`(14.2 g)/(284 g/mol)=0.05 mol`

According to reaction, 1 mole of phosphorus pent-oxide is obtained from 5 moles of oxygen gas.

Then 0.05 mole of phosphorus pent-oxide will be obtained from:

`(5)/(1)* 0.05 mol=0.25 mol`

Hence,the correct answer is option e.