A) \[6.026 \times \,\,1{{0}^{23}}\]
B) \[1.806\,\,\times \,\,1{{0}^{23}}\]
C) \[3.600 \,\times \,\,1{{0}^{23}}\]
D) \[1.80 \times \,\,1{{0}^{23}}\]
Correct Answer: B
Solution :
Let gas is \[{{X}_{3}}\] Then \[{{X}_{3}}\equiv 3\,X\] 1 mol of \[{{X}_{3}}\] has 3 moles of X atoms 0.1 mol of \[{{X}_{3}}\] has 0.3 moles of X atoms That is \[0.3\,\,\times \,\,{{N}_{A}}\] 0.1 mole has atoms \[=\,\,0.1\times 6.02\times {{10}^{23}}\times 3\] \[=1.806\,\,\times \,\,{{10}^{23}}\]
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