All of the following statements are true about a pure substance, except it is a single kind of matter.

it can be easily separated physically.

it can be an element or a compound.

it has a specific makeup or composition.

Fill in the blanks for the following statements: the rms speed of the molecules in a sample of h2 gas at 300 k will be times larger than the rms speed of o2 molecules at the same temperature, and the ratio µrms (h2) / µrms (o2) with increasing temperature. a not enough information is given to answer this question b sixteen, will not change c four, will not change d four, will increase e sixteen, will decrease