Question

Hydrogen Cyanide, HCN, is a poisonous gas. The

Answer 1

mass of NaCN = 0.539 g

Further explanation

A reaction coefficient is a number in the chemical formula of a substance involved in the reaction equation. The reaction coefficient is useful for equalizing reagents and products.

Reaction

2NaCN (s) + H₂SO₄ (aq) ⇒ Na₂S0₄ (aq) + 2HCN (g)

MW HCN = 27,0253 g/mol

MW NaCN = 49,0072 g/mol

Assume there is 1 kg air, and mass of HCN = 300 mg

mol HCN :

mass 300 mg = 0.3 g

$\tt mol=\dfrac{0.3}{27.0253}=0.011$

NaCN : HCN = 2 : 2(mole ratio from equation), so :

mol NaCN = mol HCN = 0.011

mass NaCN :

$\tt mass=mol\times MW\\\\mass=0.011\times 49.0072=0.539~g$