Question

0.1 mole SO4^-2 ion
a) find quantity of SO4^-2
b) find the total number of electron , proton and neutron.
c) find the total charge.​

Answer 1

Answer:

Total number of electrons present in 1 methane molecule =6+4=10.

Total number of electrons resent in 1 mole of methane =10×6.023×10

23

=6.023×10

24

electrons.

The number of neutrons is equal to the difference in the mass number and atomic number.

It is equal to $$\d

isplaystyle 14-6=8 $$.

(ii)(a) The number of neutrons present in 7 mg of C-14 is

14

6.023×10

23

×8

×7×10

10−3

=2.4088×10

21

neutrons.

(b) Total mass of neutrons in 7 mg of C-14 is 2.4088×10

21

×1.675×10

−27

4.035×10

−6

kg.

(iii)(a)Number of protons present in 1 molecule of ammonia =7+3=10.

Number of molecules present in 34 mg of ammonia is

17

6.023×10

23

×34×10

−3

=1.2044×10

21

.

Total number of protons present in 34 mg of ammonia=10×1.2044×10

21

=1.2044×10

22