What mass of sodium nitrate is required to give 128*g of oxygen gas upon thermolysis of the salt?

1 Answer
Feb 26, 2017

Approx. 700*g..........

Explanation:

We need a stoichiometric equation:

NaNO_3(s) + Delta rarr NaNO_2(s) + 1/2O_2(g)

We require a 128*g mass of dioxygen gas, i.e. (128*g)/(32.00*g*mol^-1)=4*mol.

Given the equation, clearly we need AT LEAST 8*mol of "sodium nitrate", i.e. 8*molxx85.00*g*mol^-1=??g