Question

Solve this Chemistry Numerical by Proving also.

Which contain more atoms, 100grams of 'Na' or 100grams of 'He' ?

Answer 1

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Here is your answer =========================================================================

>> In order to solve this problem, we should convert 100 grams of sodium into moles of sodium, and also 100 grams of helium into moles of helium. The element having more moles will have more atoms. Please note that since the atomic mass of sodium is 23 u , the molar mass of sodium will be 23 g / mol. Similarly, since the atomic mass of helium is 4 u , the molar mass of helium will be 4 g / mol. We will now calculate the moles of sodium atoms (Na) and helium atoms (He), one by one.

(i) Mass of sodium = Mass of sodium / Molar mass of sodium

= 100/23

= 4.34

(ii) Moles of helium = Mass of helium /

Molarr mass of

helium

= 100/4

= 25

We find that 100 grams of sodium contain 4.34 moles of atom whereas 100 grams of helium contain 25 moles of atoms. Since 100 grams of sodium has more moles, it contains more atoms than 100 grams of helium.

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