Agraduated cylinder weighs 100.0 g. If you add 20.0 g of water and 10 pennies, the mass is now 149.5 g. What is the average mass of the added pennies?

If a polyatomic ionic compound has gained two hydrogen ions, then how does its name begin?

Rocks, as they are compressed, begin forming mountains above the earth's surface when two continental plates converge. the continental crust increases in depth as the mountains grow above. the himalayan mountains formed at a convergent plate boundary in this manner. the rocks are smashed together causing them to due to the intense heat and pressure from the colliding plates and eventually forming rock. a) melt; igneous b) layer; sedimentary c) recrystallize; metamorphic d) melt into the earth's interior; metamorphic

If one fission reaction of a uranium-235 atom produced two neutrons, how many neutrons would be released if the chain reaction occurred three more times?