Question

7
12. The number of molecules of
Sulphur (S8) present in 16g of solid
Sulphur is how to do​

Answer 1

Answer:

Calculate the number of molecules of sulphur (S8) present in 16 g of solid sulphur.

∴ 16 g of sulphur = 16 256 1 16 = moles = 0.125 moles 1 mole of S8 molecules = 6.023 × 1023 number of molecules

 ∴ 1 16 mole of S8 = 6.023 × 1023 number of molecules × 1 16 .

Answer 2

Explanation:

Let the original volume (V)=1 and

the original pressure (P)=1 and

the temperature given (T)=−15

∘

C=−15+273=258K

V

1

or new volume after heating = original volume +50% of original volume

1+1×

100

50

=1+

2

1

=

2

3

Here P

1

is the decreased pressure

P

1

=60%

=

100

1×60

=0.6

T1=?

T

PV

=

T

1

P

1

V

1

258

1×1

=

2

3

×

T

1

0.6

T

1

=232.2K

T

1

=232.2−273

=−40.8

∘

C