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InterviewSolution
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Arrange the following in order of increasing mass (i) `3.0115xx10^(23)` molecules of white phosphorus (ii) 10 mole of `H_(2)` gas (iii) 1 g molecule of anhydrous `Na_(2)CO_(3)` (iv) `33.6 L` of `CO_(2)` gas at STPA. (a)`iilt iltIvlt iii`B. (b)`iiigt ivgt igt ii`C. (c )`ilt iilt ivlt iii`D. (d)`ilt ivlt iiilt ii` |
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Answer» Correct Answer - a At. Wt. of `P=31` and atomicity of `P` in while `P` is `4 Mol`. Wt. of white `P=31xx4=124` `:. 6.023xx10^(23)` molecules of white `P` weight `124 g` `:. 3.0115xx10^(23)` molecules of white `P` weight `124/6.023xx3.015` `=62 g` (ii) Wt. of 1 mole of `H_(2) gas =2 g` Wt. of 10 moles of `H_(2) gas =2xx10=20 g` (iii) `1 g` molecule of anhydrous `Na_(2)CO_(3)` = Mol wt. of `Na_(2)CO_(3)` in `g=106 g` (iv) At STP 22.4 L `CO_(2)` weight `44 g` `:. 33.6 L CO_(2)` weighs `44/22.4xx33.6 g` `66 g` So, the correct choric `ilt iilt ivlt iii` |
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