Calcium nitride, Ca 3N2 , reacts with water to form calcium hydroxide and molecule X. No other products are formed, and molecule X contains only nitrogen and hydrogen atoms. What…

Diammonium hydrogen phosphate, (NH4)2HPO4, can be used as a fertiliser. The following equation shows how it can be synthesised:2NH3(g) + H3PO4(aq) → (NH4)2HPO4(s)What is the mass of diammonium hydrogen phosphate…

Diborane has the formula B2H6.Assume that boron consists of two isotopes, containing 20% B105 atoms and 80% B115 atoms,and that all hydrogen atoms are H1.Molecules of diborane will therefore have…

Xenon gas reacts with fluorine gas to form gaseous xenon hexafluoride at high temperatureand pressure. The overall energy change is − 330 kJ / mol.Under these conditions, the F –…

What is the volume of hydrogen gas formed (measured at room temperature and pressure)when 0.23 g of pure sodium reacts completely with an excess of water?(Ar values: H = 1.0;…

The gases X and Y react with each other to produce gas Z according to the equation: 2X(g) + Y(g) → 2Z(g) 100 cm3 of X was mixed with 10…

The equation for the complete combustion of methane is:CH4(g) + 2O2(g) CO2 (g) +2H2O (g)If 1.60 g of methane were completely burned in 8.00 g of oxygen (an excess) to…