Answer:
The law of constant proportions states that chemical compounds are made up of elements that are present in a fixed ratio by mass. This implies that any pure sample of a compound, no matter the source, will always consist of the same elements that are present in the same ratio by mass.
To squeeze a gas into a dmaller place is to compress it.
Answer:
One atom lf helium has a mass of 4 u
Know that 1 u =1.66. 10-24g
