Question

Convert: 9.94 × 10²² molecules NH3 = ___ mol NH3

5.99 x 10⁴⁶
none of these
2.81
6.06
0.165​

Answer 1

correct answer is 0.165 moles by calculation

Answer 2

To convert molecules of NH3 to moles of NH3, use the conversion factor of 1 molecule NH3/3 atoms H. Multiply this conversion factor by the given number of molecules of NH3 to find the answer in moles.

Step-by-step explanation:

To convert molecules of NH3 to moles of NH3, we can use a conversion factor based on the fact that one molecule of NH3 contains three atoms of hydrogen (H). Therefore, the conversion factor is 1 molecule NH3/3 atoms H. Multiplying this conversion factor by 9.94 x 10^22 molecules of NH3 gives us the answer in moles: 3.313 x 10^22 mol NH3.