LOL help me
the question and answers are in the picture

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

During chemistry class, carl performed several lab tests on two white solids. the results of three tests are seen in the data table. based on this data, carl has concluded that substance b must have bonds.

200. ml of 3.00 m nacl solution is diluted to a final volume of 500. ml. what is the molarity of the final solution?