QUESTION 1 At a birthday party, some balloons were filled with hydrogen and others with helium. The hydrogen filled balloons
fook 16 hours to go flat. How long would have taken for the helium filled balloons to go flat?​

This question is Graham’s law. It states that one molecule will diffuse X times faster than another molecule, where x = square root (high atomic mass / low atomic mass). If you plug in hydrogen and helium’s masses, it’s root(4/1), or 2. That means hydrogen is twice as fast a helium, so helium will take 32 hours

The answer is c. 320 g

C. definite shape, definite volume. that is a solid.