Question

Question #0b3dc

Answer 1

`7.12 xx 10^25`

Explanation:

Each water molecule contributes two (2) hydrogen atoms, and each ammonia molecule contributes three (3) hydrogen atoms, so we have a total of:
`2 xx 2.60 xx 10^25 + 3 xx 6.40 xx 10^24 =`
`5.2 xx 10^25 + 19.2 xx 10^24 = 5.2 xx 10^25 + 1.92 xx 10^25 =`
`7.12 xx 10^25`