Question

Hey!!! Chemistry Question about MOLES... Please help...

Answer 1

Answer:

48 moles of water

Explanation:

2C2H6 + 7O2 --> 4CO2 + 6H2O

We want to find the number of moles of water produced if 16 moles of ethane (C2H6) are burned.

We can use dimensional analysis to find the answer.

Needed conversions: We need the mole ratio of ethane to water in the chemical equation which would be 2 to 6. So for every 2 moles of ethane that are burned 6 moles of water is produced.

Using this ratio we can create a table:

$\frac{16mol(C_2H_6)}{} *\frac{6mol(H_2O)}{2mol(C_2H_6)}$

the mol (C2H6) cancel out and we get

$\frac{16}{} *\frac{6}{2mol(C_2H_6)}$

we then multiply

16 * 6/2molC2H6 = 48molH2O

So if 16 moles of ethane is burned 48 moles of water is produced

Answer 2

Answer:

= 13.0 moles O2

Explanation:

1] Given the equation: 2C8H18 + 25 O2 ----> 16CO2 + 18H2O

a. How many moles of oxygen gas are required to make 8.33 moles of carbon dioxide?

8.33 moles CO2 X

25mol O2

16mol CO2

= 13.0 moles O2