Question

[1 mole = 22.4 Liters; 1 mole = 6.02 x 10 23 atoms/molecules]

1. Determine the number of grams in 0.89 moles of carbon dioxide, CO2. Show all work.

Answer 1

Answer: 40. g

Step-by-step explanation:

To find the grams in 0.89 moles of CO2, we just need to use the molar mass of CO2. The molar mass which tells us how many grams are in a mole for an element or compound.

The molar mass of CO2 is equal to the molar mass of carbon, 12.0107, and 2 oxygens, 2*15.9994 (you can find the molar mass of an element on any periodic table). Add these, and you get the molar mass of CO2 to be 44.01 g/mol, a helpful value to remember.

Now, just multiply the molar mass by the amount of moles to find grams.

`(44.01g)/(mole) * 0.89mole`, moles cancel out,
`(44.01g)/(mole) * 0.89mole=40.48g`

There are 2 significant figures in the question, so I will round this answer to 2 significant figures, 40. g