Question

36) Mass of one atom of an element is 6.645 x 10-23 g. How many
g. How many moles of elements are
there in 0.320 kg.
​

Answer 1

Answer:

8 moles of calcium

Explanation:

can refer to the picture

Answer 2

Answer: 8 MOLES

Explanation:Given condition

Mass of the atom = 6.645 × 10⁻²³ g.

Number of atoms = 1

Therefore, Atomic mass of the atom = 6.645 × 10²³ × Avogadro's number.

= 6.645 × 10⁻²³ × 6.022 × 10²³

= 40.02

≈ 40

Now,

Mass of some amount of the element = 0.32 kg = 320 g.

No of moles = 320 ÷ 40

= 8 moles.

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