Given the equation representing a phase change at equilibrium:
h2o (s) < --> h2o (l)
which statement describes this equilibrium?
a. the h2o (s) melts fadter than the h2o (l) freezes
b. the h2o (l) freezes faster than the h2o melts
c. the mass of h2o (s) must equal the mass of h2o (l)
d. the mass of h2o (l) and the mass of h20 (s) each remain constant.

How many moles are in 250 grams of tungsten (w)? * 4.4x10^23 moles 4.2x10^23 moles 0.7 moles 1.4 moles

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.

How do dying stars contribute to the formation of planets