Question

During the reaction P4 + 5O 2 P4 O10, 1.5 moles of product was made in 30 seconds. What is the rate of reaction?

a) 0.011 g/min
b) 210 g/min
c) 380 g/min
d) 850 g/min

Answer 1

850g/min

Step-by-step explanation:

The reaction expression is given as:

P₄ + 5O₂ → P₄O₁₀

Given that:

Number of moles of product = 1.5moles

Time = 30s = 0.5min

Unknown:

The rate of the reaction = ?

Solution:

Convert the moles given to mass of the product.

So;

Mass of product = number of moles x molar mass

Molar mass of P₄O₁₀ = 4(31) + 10(16) = 284g/mol

Mass of product = 1.5moles x 284g/mol = 426g

So;

Reaction rate =
`(mass of product)/(time)` =
`(426)/(0.5)` = 850g/min