Please help me I will give you the brain thing and extra points. (image below)

Blank allows you to do calculations for situations in which only the amount of gas is constant a)boyle's law b)combined gas law c)ideal gas law d)dalton's law

This element exists in adundance in the sun. explain how you would go about capturing sunlight. would this captured sunlight contain any of the element?

What is the independent variable in this investigation? mass volume sample number substance density