Question

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 .

Answer 1

Answer:

A is the correct expansion of the ans

Explanation:

BotH ARE correct and reason is the correct explanation of assertion

Plz mark me as brainliest

Manaal Fatima

Answer 2

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.