Question
Download Solution PDFThe number of moles in 52 g of He is-
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFThe correct answer is 13.
Concept:
- Mole: One mole is the amount of a substance that contains as many particles or entities as there are atoms in exactly 12 g (or 0.012 kg) of the 12C isotope.
Calculation:
- The number of moles in 52 g of He is 1
- \(Number~of~ moles = {Mass~ of~ substance \over Mass~ of~ one ~mole}\)
- The molar mass of helium gas is 4g/mol.
- Given the number of moles of substance=52g
- \(Number of moles = {52 \over 4}\)
The number of moles= 13g.
Hence the moles present in the 52g of He are 13Additional Information
- Helium:
- It is a noble gas.
- It is used for filling balloons and other lighter aircraft.
- Helium (He), when mixed with O2, is used by deep-sea divers for breathing and for respiratory patients.
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