11. The heat capacity of aluminum is 0.890 J/°C-g. How much energy is needed to raise the temperature of a 70g block of aluminum from 20°C
to 90°C?

How many total moles of ions are present in 0.0158 mol of nacl?

Seltzer water is created by placing water under pressure with carbon dioxide gas. which of the following statements best describe seltzer water: a. the solution will be slightly acidic b. the solution will be slightly basic. the solution will be strongly acidic. d. the solution will be strongly basic. e. the solution will be neutral

Joan writes four numbers on the board in standard form, and then she writes their scientific notation