Calculate the average atomic mass of chromium. Its composition is: 83.79% with a mass of 51.94 amu; 9.50% with a mass of 52.94 amu; 4.35% with a mass of 49.95 amu; 2.36% with a mass of 53.94 amu.

Question

Calculate the average atomic mass of chromium. Its composition is: 83.79% with a mass of 51.94 amu; 9.50% with a mass of 52.94 amu; 4.35% with a mass of 49.95 amu; 2.36% with a mass of 53.94 amu.

Answer 1

So, percents of each component add up to the whole.

Picture a round area made up of A and B and C and D.

If each component is 25% of that round area ..... looks like a round pizza cut north-side and east-west.

If A, B, C, and C have values of 4 amu, 8 amu, 12 amu, 16 amu

25% of 4 = 1 amu

25% of 8 = 2 amu

25% 0f 12 = 3 amu

25% of 16 = 4 amu

The average atomic mass = (1+2+3+4) amu = 10 amu

Let's look at your data set and you can mimic the above hypothetical example:

83.79% of 51.94 amu = __________ amu

9.50% of 52.94 amu = __________ amu

4.35% of 49.95 amu = __________ amu

2.36% of 53.94 amu = __________ amu

The average atomic mass = __________ amu

Hope this helps you understand and work out the problem.