When 0.4 g of impure zinc reacted with an excess of hydrochloric acid, 126 mL of hydrogen was collected over water at 10◦C. The external pressure was 737.2 Torr. What volume
would the dry hydrogen occupy at 1 atm and
298 K? The vapor pressure of water at 10◦C
is 9.21 Torr

One of the hopes for solving the world's energy problem is to make use of the fusion reaction 21h +31h --> 42he + 10n + energy how much energy is released when 1 mol of deuterium is fused with 1 mol of tritium according to the above reaction? the masses of the atoms and the neutrons are as follows: 21h = 2.0140 amu 31h = 3.01605 amu 42he = 4.002603 amu 10n = 1.008665 amu. the speed of light is 2.9979 x 108 m/s.