Question

calculate the number of calcium ions present in 0.12 gram of calcium oxide​

Answer 1

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Given 3.2 g CaO

atomic mass = 40 + 16 = 56 moles of Ca ion

= 3.256

= 0.057 1 mol

= 6.022 × 10^23 atoms of Ca ion 0.057 mol

= 3.44 × 10^22 Ca ions

Answer 2

Answer:

Given 3.2 g CaO

atomic mass = 40 + 16 = 56 moles of Ca ion

= 3.256

= 0.057 1 mol

= 6.022 × 10^23 atoms of Ca ion 0.057 mol

= 3.44 × 10^22 Ca ions