Question

Which contains the same number of ions as the value of Avogadro's constant? A) 0.5 mol of NaCl B) 0.5 mol of MgCl C) 1.0 mol of Na2O D) 1.0 mol of MgO

Answer 1

Answer:

Option (a)

Explanation:

According to mole concept,

1 mole of a molecule contains 6.022\times 10^{23}6.022×1023 number of ions. This number is known as Avogadro's number.

Ionization of KBr is given by:

KBr(aq.)arrow K^+(aq.)+Br^-(aq.)KBr(aq.)arrowK+(aq.)+Br−(aq.)

By stoichiometry,

1 mole of KBr produces 1 mole of K^+K+ ions and 1 mole of Br^-Br− ions.

So, 0.5 moles of KBr produces 0.5 moles of K^+K+ ions and 0.5 moles of Br^-Br− ions.

Using mole concept,

0.5 moles of K^+\text{ ion}=(0.5)(6.022\times 10^{23})ions=3.011\times 10^{23}ionsK+ ion=(0.5)(6.022×1023)ions=3.011×1023ions

and

0.5 moles of Br^-\text{ ion}=(0.5)(6.022\times 10^{23})ions=3.011\times 10^{23}ionsBr− ion=(0.5)(6.022×1023)ions=3.011×1023ions

So, total number of ions = (3.011\times 10^{23})+(3.011\times 10^{23})=6.022\times 10^{23}ions(3.011×1023)+(3.011×1023)=6.022×1023ions

This number of ions is equal to the value of Avogadro's number. Hence, the correct option is a.

Answer 2

Answer:

is the mass which has finite value with zero dimension is called linear mass

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Explanation:

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Which contains the same number of ions as the value of Avogadro's constant? A) 0.5 mol of NaCl B) 0.5 mol of MgCl C) 1.0 mol of Na2O D) 1.0 mol of MgO