4. Ten coins with a total mass of 26.76g will displace 3.00mL of water in a graduated cylinder. What is the density and the identity of the coins?

True or false exosphere is the least dense

Assume that 13.5 g solid aluminum (al) react with hcl to produce solid aluminum chloride (alcl3) salt and gaseous hydrogen (h2) at standard temperature and pressure.

This is a portion of the earths surface that may be far from tectonic plates boundaries yet experiences volcanism due to a rising mantle plume or some other cause