Question

22. The total charge on 1.2 g of magnesium ions[Mg] is (x*10') C. The value of x is​

Answer 1

Molar mass of Mg

+2

=24g

Given mass of Mg

+2

=48g

No. of moles of Mg

+2

=

Molar mass

Given mass

=

24

48

=2 moles

1 mole of Mg

+2

= 2 moles of electrons

∴2 moles of Mg

+2

= 4 moles of electrons

∴ No. of electrons = no. of moles of electrons × Avogadro's constant

⇒ No. of electrons =4×6.023×10

23

=2.4×10

24

As we know that,

Charge on 1 electron =1.6×10

−19

C

∴ Total charge on 48 g Mg

+2

=no. of e

−

s×charge on 1 e

−

=(2.4×10

24

)×(1.6×10

−19

)=3.84×10

5

C≈3.86×10

5

C

Hence, the correct answer is

Answer 2

Answer:

jsnsnsndnxnxnxnxnxnzjzkzkxkxkfjdkd