During this reaction, P4 + 5O2 → P4O10, 0.800 moles of product was made in 15.0 seconds. What is the rate of reaction?

The same question exists with the following choices.

A. 56.8 g/min

B. 227 g/min

C. 908 g/min

D. 13,600 g/min

The correct answer is letter C. 908 g/min.

Rate of reaction = change in conc of products (conc of products formed) / time required.

data is 0.8 moles in 15 sec.

we can simply put it in formula and solve it but the answers are in units of g/min whereas data is in moles/sec.

lets convert it then!

mass in grams = moles x molar mass

molar mass of P4O10 = 31*4 + 10*16 = 284grams/mole

mass in grams = 0.8 x 284 = 227.2 g

time = 15 s

convert in min by dividing by 60

t = 15/60 = 0.25min

now put in formula = 227.2 / 0.25 = 908 g/min