UNIT 2: SUBSTANCES xercise 21
If 30 mL of water weighs 30 g, and the same volume of mercury weighs 408 g.
calculate the densities of water and mercury.
Is tasting an advisable method for identifying substances? Why?
What is the difference between ice, liquid water and steam?
Do you think plastic and rubber conduct electricity?
al Pronerties

How many moles of magnesium is 3.01 x10^22 atoms of magnesium?

As air becomes more dense, (select all that apply) o. air weighs less o. gas molecules are closer together o. air is colder o. air weighs more o. gas molecules are further apart o. air is hotter

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.