A) the definition of mass in units of grams
B) the mass of one mole of carbon
C) the ratio of chemical species to each other in a balanced equation
D) the ratio of elements to each other in a compound
Correct Answer: A
Solution :
| If avogadro number \[{{N}_{A}},\] is changed from \[6.022\times {{10}^{23}}mo{{l}^{-1}}\] to \[6.022\times {{10}^{20}}mo{{l}^{-1}},\] this would change the mass of one mole of carbon. |
| \[\because \] 1 mole of carbon has mass = 12 g |
| or \[6.022\times {{10}^{23}}\] atoms of carbon have mass = 12 g |
| \[\therefore \] \[6.022\times {{10}^{20}}\] atoms of carbon have mass |
| \[=\frac{12}{6.022\times {{10}^{23}}}\times 6.022\times {{10}^{20}}\] |
| \[=0.012g\] |
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