Question

Ca (OH)₂ + HNO3 = Ca ₂ NO ₂ + H₂Oкоефіцієнт ​

Answer 1

Ca(OH)2 + 2HNO3 → Ca(NO3)2 + 2H2O.

Перед азотной кислотой и водой нужен коэффициент 2.

Answer 2

The balanced equation for the reaction between calcium hydroxide (Ca(OH)₂) and nitric acid (HNO₃) is as follows:

Ca(OH)₂ + 2HNO₃ → Ca(NO₂)₂ + 2H₂O

The coefficients in the balanced equation indicate the number of molecules or moles of each substance involved in the reaction. In this case, 1 molecule of calcium hydroxide reacts with 2 molecules of nitric acid to produce 1 molecule of calcium nitrite and 2 molecules of water.