The molecular mass of ammonia (NH, ) is 17g/mol. How many grams of ammonia are in 6 moles of ammonia?

What mass of natural gas (ch4) must you burn to emit 276 kj of heat?

Why is the bottom layer of a trophic pyrimid the

The comparison of the number of atoms in a copper coin the size of a penny with the number of people on earth is made to illustrate which of the following? a. that atoms are indivisible b. that atoms are very small c. that atoms are very large d. that in a copper penny, there is one atom for every person on earth