A 20.0-L tank contains 4.86 × 10-4 kg of helium at 18.0°C. The molar mass of helium is 4.00g/mol. (a) How many moles of helium are in the tank?

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A 20.0-L tank contains 4.86 × 10-4 kg of helium at 18.0°C. The molar mass of
helium is 4.00g/mol. (a) How many moles of helium are in the tank?
Transcribed Image Text:A 20.0-L tank contains 4.86 × 10-4 kg of helium at 18.0°C. The molar mass of helium is 4.00g/mol. (a) How many moles of helium are in the tank?
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