Answer:
86.8 grams
Explanation:
The equation to convert molecules to grams is
2.9x10^24molecules x 1 mole/6.02x10^23molecules x 18.02grams/1mole=86.8grams
6.02x10^23 is Avogadro's number and 18.02 is the molar mass of H₂O (1.01 x 2 + 16.00)
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