Hydrogen fluoride can etch glass - it reacts with the main
component of glass, silicon dioxide, in the following equilibrium
reaction above the boiling point of water:

SiO2(s) + 4 HF(9) = SiF4(g) + 2 H20(g)

Predict whether [SiF4] increases, decreases, or remains
unchanged when:

(a) H2O(g) is removed.
(b) Some steam is added.
(c) Some hydrogen fluoride is removed.
(d) Some silicon dioxide is removed.

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.