Question

how much mass in grams is represented by the following::a.. 0.1 mole of NaCl
b.. 0.5 Mol of c
c.. 5.6 l of Co2 at ntp

Answer 1

Hi mate.

Thanks for asking this question.

Here is your answer,


(a) 0.1 moles of NaCl.

Firstly,

We have,

Molar mass of NaCl = Na + Cl

= 23 + 35. 5

= 58.5

We know that,

No. Of moles = weight of NaCl / molar mass.

0.1 = weight of NaCl / 58.5

0.1 × 58.5 = weight of NaCl


Therefore,

weight of NaCl = 5.85 gm.




( b) 0.5 moles of C


GIVEN,

n = 0.5 mole

Then we can find,

Molar mass of C = 12×1

= 12.

Then,

We know that,

No of moles = weight of C / molar mass

0.5 = weight of C / 12

0.5 × 12 = weight of C


Therefore,

weight of C = 6 gm.




(c) 5.6 L of co2 at ntp.

This is interesting question.

Thanks for asking this.

Answer :

Given,

Volume = 5.6 L.

We have a formula,

n = v / 22.4 L

n = 5.6 / 22.4 L

n = 56 / 224

n = 1 / 4

Therefore,

n = 0.25 moles.


Again we find the molar mass of co2,

= 12 + 2 × 16

= 44.

We know that,


No. Of moles of co2 = weight of CO2 /
Molar mass

0.25 = weight of CO2 / 44

0.25 × 44 = weight of CO2

Therefore,

weight of CO2 = 11 gm.





Thank you.




BE BRAINLY !!!!!!!!!!!!!!!!

Answer 2

Answer:

ANSWER IS B)

Explanation: