Answer:
1 mole of calcium, one mole of carbon, and 3 moles of oxygen.
Explanation:
Answer: 0.125mg americium
Half-lives is a set of duration when a sample will become half of their original mass. In this case, the initial mass is 1mg and the sample is going for 3 times half-lives. Then the calculation would be: 1mg

= 1/8 mg= 0.125mg.
Pls make ur question alittle clearer by may be saying the chemical compound or writing the required reaction