obflanigan obflanigan

11-03-2016
Chemistry

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What is the mass of 2.50 ×1022 molecules of NaOH

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Willchemistry Willchemistry

15-03-2016

Molar Mass NaOH = 40.0 g/mol

40 g ----------6.02x10²³ molecules
?? g ---------- 2.50x 10²² molecules

Mass = 2.50x10²² * 40 / 6.02x10²³

Mass = 1x10²⁴ / 6.02x10²³

Mass = 1.6611 g

hope this helps!

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