On complete combustion of a hydrocarbon 0.88g of carbon (iv) oxide and 0.36g of water
were formed (i) calculate the molecular formula of the hydrocarbon given that relative
molecular mass of the hydrocarbon is 70. (c = 12, O= 16)

The lattice enthalpy (formation of ionic solid from ions in the gas phase) for agcl(s) is -916 kj/mol and the hydration enthalpy (dissolution of gaseous ions into water) is -850 kj/mol. how much heat (in joules) is involved in forming 1l of saturated agcl solution (1.8 × 10-4 g / 100 ml water) by dissolving agcl(s)? assume solution volume does not change much upon dissolution. the equations are given below. ag+(g) + cl−(g) æ agcl(s)