Question

justify equal number of moles of all element contains equal number of atoms​

Answer 1

Answer:

To calculate the number of atoms in a sample, divide its weight in grams by the amu atomic mass from the periodic table, then multiply the result by Avogadro's number: 6.02 x 10^23.

Explanation:

Answer 2

Answer:

12g He

Explanation:

option is D)

Number of atoms present in W g of a substance =

M

W

×N

a

.

Here, N

a

represents Avogadro's number. M represents the atomic mass of substance.

Number of atoms in 4 g He=

4

4

×N

a

=N

a

Number of atoms in 46 g of Na=

23

46

N

A

=2N

A

Number of atoms in 0.40 g of Ca=

40

0.4

N

A

=0.01N

A

Number of atoms in 12 g of He=

4

12

N

A

=3N

A

Hence, 12 g of helium has the maximum number of atoms.