Question

How many moles of water, H2O, contain 2.0×1022 molecules of water?

Answer 1

1 mole H2O ------------- 6.02x10²³ molecules
?? moles H2O ---------- 2.0x10²² molecules

( 2.0x10²²) x 1 / 6.02x10²³ => 0.03322 moles

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