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A sample of sodium hydroxide (NaOH) has a mass of 160.0 g. The molar mass of NaOH is 40.00 g/mol. How many moles of NaOH does this sample contain? A) 4.000 B) 40.00 C) 160.0 D) 6,400
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A sample of sodium hydroxide (NaOH) has a mass of 160.0 g. The molar mass of NaOH is 40.00 g/mol. How many moles of NaOH does this sample contain?

A) 4.000
B) 40.00
C) 160.0
D) 6,400

User Sergej
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2 Answers

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The answer is a because all you have to is 160*1/40=4.000
User Coisox
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The correct answer is A. A sample of sodium hydroxide (NaOH) has a mass of 160.0 g which is equal to 4 moles of NaOH. TO calculate this, we use the relation of the molar mass given.

160.0 g NaOh ( 1 mol NaOH / 40.0 g NaOH ) = 4.000 mol NaOH
User Jagoly
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