1. The reaction takes place according to the equation:
Na2O + 2HNO3 = NaNO3 + H2O;
2.m (HNO3) = m (HNO3 solution) * w (HNO3) (in fractions);
m (HNO3) = 105 * 0.6 = 63 g;
3. M (HNO3) = 1 + 14 + 3 * 16 = 63 g / mol;
n (HNO3) = m (HNO3): M (HNO3);
n (HNO3) = 63: 63 = 1 mol;
4.According to the reaction equation, the acid requires twice as much as sodium oxide, then the amount of oxide:
n (Na2O) = n (HNO3): 2 = 1: 2 = 0.5 mol;
5.m (Na2O) = n (Na2O) * M (Na2O);
M (Na2O) = 2 * 23 + 16 = 62 g / mol
m (Na2O) = 0.5 * 62 = 31 g.
Answer: 31 g.
One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.