chemistry help!?
2020-10-12 11:58 pm
Calculate the mass (in grams) of 3 water molecule(s) Express your answer to four significant figures and include the appropriate units?
回答 (1)
2020-10-13 12:17 am
Mass of 1 mole of H₂O = (1.008×2 + 15.999) g/mol = 18.015 g/mol
No. of molecules in 1 mole of H₂O = 6.022 × 10²³ molecules/mol
Mass of 3 H₂O molecules = (18.015 g) × [3/(6.022 × 10²³)] = 8.975 × 10⁻²³ g
No. of molecules in 1 mole of H₂O = 6.022 × 10²³ molecules/mol
Mass of 3 H₂O molecules = (18.015 g) × [3/(6.022 × 10²³)] = 8.975 × 10⁻²³ g
收錄日期: 2021-04-24 08:01:48
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