Finding Mole Ratios of 3 Substances

[disneychannel]

How can you find mole ratios for 3 substance
ex
2.94 X 10 to the 5 of NH3
1.56 X 10 to the 5 O2
9.61 X 10 to the 3 CH4

 

[Borek]

Please elaborate. Why just

2.94x10⁵:1.56x10⁵:9.61x10³

is not the answer?

--

 

[quicknote]

To find the mole ratios for these three substances, we can use the coefficients in a balanced chemical equation. First, we need to write out the balanced equation for the reaction involving these substances. Let's assume the reaction is:

2NH3 + 3O2 → 2NO + 3H2O

Based on this equation, we can see that the mole ratio between NH3 and O2 is 2:3, and the mole ratio between NH3 and CH4 is also 2:3. However, we cannot determine the direct mole ratio between O2 and CH4 as they are not directly involved in the reaction.

To find the mole ratio between O2 and CH4, we can use the mole ratio between NH3 and O2 (2:3) and the mole ratio between NH3 and CH4 (2:3). By multiplying these two ratios, we can get the indirect mole ratio between O2 and CH4, which is 4:9.

Therefore, the mole ratios for the given substances are:

NH3 : O2 : CH4 = 2 : 3 : 4/9

In order to verify these ratios, we can also convert the given masses into moles by using the molar masses of each substance. Once we have the moles of each substance, we can compare them to the ratios we calculated above. If the ratios match, it confirms the accuracy of our calculations.

In conclusion, to find the mole ratios for three substances, we need to use a balanced chemical equation and the coefficients to determine the direct and indirect ratios between the substances. These ratios can then be verified by converting the given masses into moles and comparing them to the calculated ratios.