Calculate the number of atoms in 3 mol of NH3.

Calculate the number of oxygen atoms in 0.10 mole of Na_2CO_3* 10H_2O .

Calculate number of moles in 48g of NH3

Calculate the number of millilitre of NH_3 (aq) solution (d=0.986 g/mL) contain 2.5% by mass NH_3 , which will be required to precipitate iron as Fe(OH)_3 in a 0.8g sample that contains 50% Fe_2O_3 .

Heat change for a reaction N_(2)(g) + 3H_(2) (g) to 2NH_(3)(g) is - 92.2 kj/mol. Calculate the heat of formation of one mole of a ammonia.

Calculate the oxidation number of nitrogen (N) in NH3

Calculate the actual weight of : a molecule of NH_3

For the reaction, N_2+3H_2 rarr 2NH_3 the rate of reaction measured as (Delta [NH_3])/(Delta t) was found to be 2.4 xx 10^-4 mol L^(-1) s^(-1) . Calculate the rate of reaction expressed in terms of (i) N_2 and (ii) H_2 .

The enthalpy change for the reaction N2(g) + 3 H2(g) → 2 NH3(g) is -91.8 kJ at 298 K. Calculate the enthalpy of formation of ammonia?