Sodium chromate is used to protect iron from corrosion and rusting. Determine its molecular mass.
A)261.97 amu
B)238.98 amu
C)161.97 amu
D)138.98 amu
E)74.99 amu

Question

Quizplus · Accepted Answer

The molecular formula for sodium chromate is Na2CrO4. Its molecular mass is calculated as follows: (2 x 22.99) + 51.9961 + (4 x 16.00) = 45.98 + 51.9961 + 64.00 = 161.9761 amu, which rounds to 161.97 amu.

Sodium Chromate Is Used to Protect Iron from Corrosion and Rusting