Question

. Solid carbon is known to react with oxygen to produce carbon dioxide. If a mass of 1.2
g of carbon is burned in oxygen, 4.4 g of carbon dioxide is found to form. How many
grams of oxygen gas reacted with the carbon?

Answer 1

Ive been stuck on this for a while

Answer 2

I seriously need help. I have a test tomorrow

Answer 3

Well that seems really simple, and this is AP cHEM, SO IT SEEMS A BIT OFF.

Answer 4

Sorry caps

Answer 5

Ah, so real chemistry. Have you gone over moles yet?

Answer 6

First off notice it is a 1 to 1 reaction.

1.

Convert the product to moles

moles = grams/molecular mass

2.

Because it is 1 to 1

moles of CO2 produced = Moles of O2 reacted

3.
Then use the formula:

moles = grams/molecular mass

to convert moles of O2 to grams of O2

Note its always a good idea to start from the products just in case there is not a complete reaction.

Answer 7

How to calculate molecular mass:
https://www.youtube.com/watch?v=F9NkYSKJifs

Answer 8

sooo

Answer 9

Molar Mass:
Carbon: 12.01g/mol
Oxygen (Diatomic): 16.00g/mol
Carbon Dioxide: 44.01 g/mol


C + O2 = CO2

We have 1.2 g of Carbon. Let's change it to moles:

\[1.2gC \times \frac{ molC }{ 12.01gC } = 0.10molC\]

We also have 4.4g of CO2 after the reaction. Let's also change this into moles.

\[4.4gCO_2 \times \frac{ molCO_2 }{ 44.01gCO_2 } = 0.10molCO_2\]