Question

which of the following contains least number of molecules 1. 4.4g of co2 2. 3.4g of nh3 3. 1.6 g ch4 4. 3.2g so2

Answer 1

Answer:

3.2g SO2

number of molecules is equal to number of moles into n a n a is equal to 6.023 into 10 to the power 23

Answer 2

3.2g of so2 contains the least number of molecules

Explanation:

As we know,

No. of molecules = no. of moles * $N_{A}$

= $6.022 * 10^{22}$

1). 4.4g of Co2

n = w(weight)/m(molar mass)

No. of molecule = 4.4/44

= 0.1 * $N_{A}$

2). 4g of Nh3

n = w/m

= 4/17

= 0.2 * $N_{A}$

3). 1.6g of ch4

= 1.6/16

= 0.1 * $N_{A}$

4). 3.2g of So2

= 3.2/64

= 32/640

= 0.05 * $N_{A}$

Thus, 3.2 g of So2 has the least number of molecules.

Learn more: find the number of molecules

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