How are igneous rocks formed?

a. from the cooling & hardening of molten material
b. by being deposited in layers from weathered rock material
c. by slowly being deposited from dripping water on cave floors over time
d. from two or more rocks that have morphed together under intense pressure

Calculate the mass of silver needed to react with chlorine to produce 126g if silver chloride?

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.

Which of the following units is not an official si unit