Question

How many grams of NaC2H3O2 are needed to prepare 350. mL of a 2.75 M solution?

i got 79.0 ??

Answer 1

If you have copied the problem right the answer is 78.9 g.
You have three significant figures i 3.75 and 350. mL has 3.

2.75 x 0.350 x 82.0 = 78.92 which rounds to 78.9 g to 3 s.f.

Answer 2

thanks