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OpenStudy (anonymous):
the molar mass of water (H2O) is 18.0 g/mol. A sample of water has a mass of 18.0. How many moles of water are contained in this sample? A. 1.00 B. 18.0 C. 36.0 D. 324
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Vocaloid (vocaloid):
molar mass = grams/moles re-arranging gives us moles = grams/molar mass
OpenStudy (anonymous):
i just want an answer
Vocaloid (vocaloid):
giving direct answers is against the rules http://openstudy.com/code-of-conduct since we know that moles = mass/molar mass, we can plug in the mass and the molar mass to find the number of moles
OpenStudy (anonymous):
1.00?
Vocaloid (vocaloid):
yes, good job!
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Use Hvap of water = 40.7 kJ/mol, c of water = 4.184 J/g.u00b0C, and molar mass of HO = 18.
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