Along each row of the periodic table,
a. atomic mass increases from left to right.
b. atomic mass decreases from left to right.
c. atomic mass is the same for all elements in the row.
d. atomic mass changes in no set pattern.

The density of an unknown gas at 98°c and 740 mmhg is 2.50 g/l. what is the molar mass of the gas with work showed?

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

What is the percentage of hydrogen in nitrogen trihydride