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

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Answer 1 · 2017-02-26T09:00:07

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

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. $8*molxx85.00*g*mol^-1=??g$

What mass of sodium nitrate is required to give 128*g128*g of oxygen gas upon thermolysis of the salt?