# What mass of carbon dioxide is made when 22 g of propane is burned in oxygen?

##### 1 Answer

66 grams of Carbon Dioxide.

#### Explanation:

The common currency of chemistry is moles. So it is necessary to change the mass of propane to moles. Then write a balance equation so the moles of propane to moles of Carbon Dioxide. Finally moles of Carbon Dioxide must be changed to grams.

This is the balance equation for the burning of propane in Oxygen.

From the equation it can be seen that 1 mole of propane makes 3 moles of Carbon Dioxide a ratio of 1:3

Convert 22 grams of propane to moles by dividing by the molar mass of propane.

3 x 12 = 36 grams

1 x 8 = + 8 grams

total = 44 grams/ mole.

Using the ratio of 1:3 .5 = 3( .5) = 1.5 moles of Carbon Dioxide.

Now multiply 1.5 moles of Carbon Dioxide by the molar mass of Carbon Dioxide

1 x 12 = 12 grams

2 x 16 = +32 grams

total = 44 grams /mole.

1.5 moles x 44 grams/mole = 66 grams.