Question

1. Find the number of atom in 200 gm of calcium.
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Answer 1

Answer:

30.110 ×10^23 particles.

Explanation:

given,

given mass = 200g

molar mass of calcium= 40g

formula,

no. of moles = given mass÷ molar mass

= 200÷ 40 = 5 mole

1 mole contain no. of particles os avagadro's no.( 6.022×10^23)

5 mole of calcium contain no. of particles = 5×6.022×10^23 = 30.110 ×10^23

Answer 2

divide given mass by avogadro no NA

you will get the answer

hope it's helpful for you