Question

Ca+ HNO3—>Ca(NO3)2+N2O+H2O ОВР

Answer 1

4Ca+10HNO3=4Ca(NO3)2+N2O+5H2O
Ca - 2e = Ca(+2)
2N(+5) + 8e = 2N(+1)

Answer 2

Ca - 2e = Ca(+2) коэффициент 4
2NO3(-) + 10H(+) + 8e= N2O + 5H2O коэффициент 1
4Ca + 10HNO3 = 4Ca(NO3)2 + N2O + 5H2O

если умеешь только электронным балансом уравнивать
Ca - 2e = Ca(+2) коэффициент 4
2N(+5) + 8e =2 N (+1) коэффициент 1
результат тот же
Вроде так должно быть 

Answer 3

Chemical Equation:

The given chemical equation is: Ca + 2HNO3 → Ca(NO3)2 + N2O + H2O

Balancing the Chemical Equation:

To balance the chemical equation, we need to ensure that the same number of each type of atom is present on both sides of the equation.

Balanced equation: 3Ca + 8HNO3 → 3Ca(NO3)2 + 4NO + 4H2O

Explanation:

In the balanced chemical equation, 3 moles of calcium (Ca) react with 8 moles of nitric acid (HNO3) to produce 3 moles of calcium nitrate (Ca(NO3)2), 4 moles of nitric oxide (N2O), and 4 moles of water (H2O).

Source:

The information provided is based on the chemical reaction and its balanced equation. No specific source was cited for this information.