Answer:
3.87 x 10^24
Explanation:
Simply multiply the moles by avogadros number
6.42 moles of H2O x 6.022 x 10^23 molecules/1 mole of H2O = 3.87 x 10^24 molecules of H2O
H
b/c the polyatomic PO4¯³
have 3 valance number
wer here. Link below!
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bit.
Answer The outer layer of the Earth is called the crust.
Explanation: Because it's in the earth atmosphere
