* Which of the following is classified as an element?
a. H20
b. Carbon
c. all of the above
d. Tea

What mass of carbon dioxide is produced from the complete combustion of 4.50×10−3 g of methane?

Describe the difference between a. a hypothesis and a theory and b. an observation and an experiment.

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.