Which of these substances are elements?

quartz
water
iodine
lead
silicon
silicone

You have a sample of a gas that occupies a volume of 17ml at -111 degrees celsius. what volume does the sample occupy at 88 degrees celsius? show all work asap

Suppose the universe were completely empty except for one object-a solid sphere moving through space of 100 km/s. what sort of path would the object be moving in? explain your answer

Heat is the total potential energy of a substance that can be transferred. true false