Question

calculate the number of molecules of
84.0g of NaOH​

Answer 1

Answer:

Particle=given mass/molecular mass

NaOH=23+16+1=40

We have mass =84g

84/40=2.1

Explanation:

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Answer 2

Answer:

Explanation:

Mass of NaOH = Atomic mass of Na + Atomic mass of O + Atomic mass of H

= 23 + 16 + 1

= 40g

1 mole = Molecular mass/ Atomic mass = 6.022 ⨉ 10²³

40g of NaOH molecules contain= 6.022 ⨉ 10²³

84g of NaOH molecules contain= 6.022 ⨉ 10²³/ 84

= 7.169 ⨉ 10²¹ molecules

Hope the answer is correct.