4 Explain why
a a sodium ion has a charge of 11

b a chloride ion has a charge of 12.

If 1.63 times 10 negative 4 of helium dissolves in 100.0g of water, what is the concentration in parts per million

What is the mass of 8 moles of sodium atoms

Suppose that some of the compound spilled out of the crucible after it was heated. would that cause the percent by mass of water in the compound determined by the experiment to be too low, too high, or unchanged? briefly explain your answer.