Question #0b3dc

1 Answer
Aug 29, 2017

Answer:

#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#