Answer to Question #224624 in General Chemistry for Pay

Question

In the commercial manufacture of nitric acid, how many liters of nitrogen dioxide will produce 30 liters of nitric oxide given that both gases are at STP?

3NO₂ + H₂O  2HNO₃ +NO 

A. 20 liters 

B. 0.1 liters 

C. 40 liters 

D. 90 liters 

E. 1.01 liters

Answer 1

moles of nitric oxide:

under STP (Standard Tempreture and Pressure) 

22.4L of any gas = 1mole

so 30L of NO: 30 / 22.4 = 1.33928571429 moles

so you use the ratios 3:1 to find the moles of the nitrogen dioxide: 1.33928571429 x 3 (is the ratio) =4.01785714286mol⁻¹ of NO₂

now to find liters use: L = Moles x 22.4

L of NO₂ = 90L