Assertion. (A): The number of the of He in 52gm of He is 13..
Reason. (R): The number of moles of an atoms is the ratio of its given mass to its molar mass .
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Answer:
A is the correct expansion of the ans
Explanation:
BotH ARE correct and reason is the correct explanation of assertion
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Manaal Fatima
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Both assertion and reason are true about Helium.
- The number of moles is calculated by the given formula, which is = mass/molar mass.
- The molar mass of Helium is 4 grams/mole.
- Keep the values in the formula to calculate several moles.
Number of moles = 52/4
Number of moles = 13
- Thus, the number of moles in 52 grams of Helium is 13.
- As the formula in reason can be used to calculate the number of moles, they both are true.
- Helium is a noble gas and hence inert, found in group 18 of the periodic table.
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