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For the hypothetical compound AX3,
which statement is true?
o A is a nonmetal from Group 3A, and X is a metal from Group 1A.
O A is a metal from Group 3A, and X is a nonmetal from Group 7A.
O A is a metal from Group 1A, and X is a metal from Group 7A.
O A is a metal from Group 3A, and X is a nonmetal from Group 5A.
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If 1.63 times 10 negative 4 of helium dissolves in 100.0g of water, what is the concentration in parts per million

You encounter a solution that is acidic and you decide to test it by adding a small amount of a strong acid. the ph lowers slightly but is approximately unchanged, and still remains acidic. what can you say about the solution? a. it is a buffer solution. b. it is not a buffer solution it is a strong acid solution. d. the solution has been neutralized. e. the solution has excess acid present

Elements in group 2 are all called alkaline earth metals. what is most similar about the alkaline earth metals?