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Can someone help with this question ?

Can someone help with this question ?-example-1
User Jkoch
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2 Answers

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Answer:

32 moles of Oxygen

Step-by-step explanation:

C3H8 + O2 --> CO2 + H2O

There are 3 Cs on the left so you need to make 3 Cs on the right

C3H8 + O2 --> 3 CO2 + H2O

There are 8 Hs so you need to make 8 Hs on the right

4 times H2 makes 8 so put a 4 in front of H2

C3H8 + O2 --> 3 CO2 + 4 H2O

Then find the number of oxygen on the right

3 times O2 + 4 times O

6 + 4 = 10 Os

So put 5 in front of O2 to make 10

because 5 times 2 is 10

C3H8 + 5 O2 --> 3 CO2 + 4 H2O

Now it is balanced

and you can check

Left: C= 3 H= 8 O= 10

Right: C= 3 H= 8 O= 6+4

Now you need to find how many moles of oxygen are necessary to react to 4 moles of C3H8

4 moles of C3H8 is just 4 C3H8

Just multiply the whole equation by 4

4 C3H8 + 20 O2 --> 12 CO2 + 16 H2O

C = 12 H = 32 O = 40

C = 12 H = 32 O = 24 + 16 which is 40

When a number is in front you multiply each element with it

12 times 2Os = 24 16 times 1 O

So 32 moles are necessary to react to 4 moles of C3H8

User Alexandre M
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Balance the equation:
Can someone help with this question ?-example-1
User Daniel Gelling
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