Question

20. Which of the following possess highest mass?
(1) 0.2 mol of Co, gas
(3) 3.01 x 1023 molecules of water
(2) 2.24 L SOZ
(4) 20 g calcium​

Answer 1

Answer:22g calcium

Explanation:

Answer 2

Correct Question

Which of the following possess highest mass?

(1) 0.2 mole  of $CO_{2}$ gas.

(2) $3.01 \times 10^{23}$molecules of water

(3) 2.24 L  $SO_{2}$.

(4) 20 g calcium​

Answer:

The highest mass is possesses by 20 g calcium and option(4) is correct.

Explanation:

Given:

(1) 0.2 mole  of $CO_{2}$ gas.

(3)  molecules of water

(2) 2.24 L  $SO_{2}$.$3.01 \times 10^{23}$

(4) 20 g calcium​

To Find:

The highest mass is possesses  by which as  given options.

Solution:

(1). As given,$0.2 \ mole\ of$ $CO_{2}$ gas.

    Mass = number of moles × molar mass

   1 mole of $CO_{2}$  $= 44 g$

   ​0.2 moles of $CO_{2}$ $= 44\times0.2 = 8.8g$.

(2). As given,$3.01 \times 10^{23}$ molecules of water.

     1 mole of $H_{2} O$ contains $6.023\times10^{23}$ molecules.

      $6.023\times10^{23}$ molecules of $H_{2} O$  $= 18 g$

       $3.01 \times 10^{23}$  molecules of $H_{2} O$ $= \frac{18\times3.01\times10^{23} }{6.023\times10^{23} } =8.99g$.

(3).As given,2.24 L $SO_{2}$.

        1 mole of gas occupies 22.4 L volume at N.T.P.

         22.4 L of  $SO_{2}$. gas = 64 g

         2.24 L of  $SO_{2}$. gas  $=\frac{64\times2.24}{22.4 } = 6.4 g$.

(4).As given,20 g calcium.

     Mass of  calcium $= 20 g$.

Thus, the highest mass is possesses by 20 g calcium and option(4) is correct.

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