Answer:

Explanation:
You must convert the mass of B₄H₁₀ to moles of B₄H₁₀, then to molecules of B₄H₁₀, and finally to atoms of H.
1. Moles of B₄H₁₀

2. Molecules of B₄H₁₀

3. Atoms of H

Answer:
84.2 grams
Explanation:
you have to multiply 8.42x10^18 to get the answer above
1: it is +2
2: it is +6
(Make this brainliest answer please)