Problem: Which of the following represents the least number of molecules?(a) 20.0 g of H2O (18.02 g/mol)(b) 77.0 g of CH4 (16.06 g/mol)(c) 68.0 g of CaH2 (42.09 g/mol)(d) 100.0 g of N2O (44.02 g/mol)(e) 84.0 g of HF (20.01 g/mol)

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We are being asked to determine which of the following represents the least number of molecules

The flow for this problem will be like this:

Mass compound (molar mass compound)  Moles compound (Avogadro’s number) → Molecules compound

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Problem Details

Which of the following represents the least number of molecules?

(a) 20.0 g of H2O (18.02 g/mol)

(b) 77.0 g of CH4 (16.06 g/mol)

(c) 68.0 g of CaH2 (42.09 g/mol)

(d) 100.0 g of N2O (44.02 g/mol)

(e) 84.0 g of HF (20.01 g/mol)

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What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Mole Concept concept. You can view video lessons to learn Mole Concept. Or if you need more Mole Concept practice, you can also practice Mole Concept practice problems.

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Based on our data, we think this problem is relevant for Professor Tate's class at CSUSB.

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Our data indicates that this problem or a close variation was asked in Chemistry - OpenStax 2015th Edition. You can also practice Chemistry - OpenStax 2015th Edition practice problems.