Question

Calculate no.of moleculles presnt in 0.25 mol of Ca(oh)^2​

Answer 1

Answer:

atoms

Calcium Hydroxide has three atoms 5 atoms in each molecule.

One calcium atom

Two oxygen atoms

Two hydrogen atoms

So total 5NA

atoms are present in NA

Explanation:

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Answer 2

number of mole s of H

2

= 0.25 moles

number of molecules = moles * Avogadro’s Number

number of molecules = 0.25×(6.022×10

23

)

number of molecules = 1.505×10

23

single molecule of hydrogen contains two H-atoms. So,

number of atoms = 2×(1.505×10

23

) = 3.01×10

23