A) \[15\,\,L\]of\[{{H}_{2}}\]gas at\[STP\]
B) \[5\,\,L\]of\[{{N}_{2}}\]gas at\[STP\]
C) \[0.5\,\,g\]of\[{{H}_{2}}\]gas
D) \[10\,\,g\]of\[{{O}_{2}}\]gas
Correct Answer: A
Solution :
In\[15\,\,L\]of\[{{H}_{2}}\]gas at\[STP\], the number of molecules \[=\frac{6.023\times {{10}^{23}}}{22.4}\times 15\] \[=4.033\times {{10}^{23}}\] In \[5\,\,L\] of \[{{N}_{2}}\] gas at\[STP\], the number of molecules \[=\frac{6.023\times {{10}^{23}}\times 5}{22.4}\] \[=1.344\times {{10}^{23}}\] In \[0.5\,\,g\] of \[{{H}_{2}}\] gas, the number of molecules \[=\frac{6.023\times {{10}^{23}}\times 10}{32}\] \[=1.505\times {{10}^{23}}\] In\[10\,\,g\]of\[{{O}_{2}}\]gas, the number of molecules \[=\frac{6.023\times {{10}^{23}}\times 10}{32}\] \[=1.882\times {{10}^{23}}\] Hence, maximum molecules are present in\[15\,\,L\]\[{{H}_{2}}\]at\[STP\]
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