Question

How many numbers of atoms in 52gram of He

Answer 1

Answer:

No of moles = given mass / molar mass

[molar mass of He (helium) = 4g]

No of atoms = 52 / 4 = 13 moles

No of atoms = 13 * 6.022 * 10^23

= 78.2 * 10^23 atoms of He

Answer 2

Answer:

Friend i will try to clear ur doubts, but plz mark it as brainliest and say thanks if it HELPS.

STEP 1 : GIVEN MASS OF HELIUM = 52 GM

STEP 2: MASS OF I MOLE (OR 6.022 X 10^23 ATOMS) OF HELIUM = 4 GM (WE KNOW THIS, IF U DONT' THEN I WILL SUGGEST U TO MEMORISE THIS)

STEP 3 : SO NO OF MOLES IN 52 GM OF HELIUM = 52/4 = 13

THUS NO OF ATOMS =  AVOGADRO NO X NO OF MOLES

= 6.022 X 10^23 X 13= 78.286 X 10^23

PLZ BRO MARK IT AS BRAINLIEST