What is the molar mass of #Sr(NO_2)_2#?

1 Answer
Jan 28, 2017

Answer:

Well, the atomic mass of #Sr# is #87.6*g*mol^-1#....

Explanation:

That of nitrogen is #14.01*g*mol^-1#; and that of oxygen is #15.999*g*mol^-1#.

Do you suppose you could do the sum: #(87.6+2xx14.01+4xx15.999)*g*mol^-1#?

Why did I mulitply the atomic mass of oxygen by four? Would you have to remember these atomic weights in an exam?