A) 2
B) 190
C) 40
D) 55
Correct Answer: C
Solution :
Key Idea: \[\text{=}\,\frac{\text{mass}}{\text{molecular}\,\text{mass}}\] Given mass of \[{{\text{H}}_{2}}O=720\,g\] \[\therefore \]Moles of water \[=\frac{720}{18}=40\]
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