Got Calcium?
Answers:
1. The mass of the Sun is 2.0 x 1030 kg. With the mass of Cas A as 20 times the mass of the Sun, and 0.05% of that mass being calcium, the amount of calcium in Cas A is
(20 x 2.0 x 1030 kg) x 0.0005
= 2.3 x 1028 kg of Ca in remnant
2. The total number of glasses of milk is then