Explain the design and function of a sponge.

Which fossil fuel is mainly used for heating and cooking? a. electricity b. coal c. petroleum d. natural gas

How many moles in .5g of sodium bromide?

Acertain atom has 22 protons and 19 electrons. this atom loses an electron. the net charge on the atom is now 4+1+01-4-. if this same atom with 22 protons and 19 electrons were to gain 3 electrons, the net charge on the atom would be 3+2+02-3-.