Question

SOMEONE HELP ME

1. How many grams of C are present in 4.86 grams of carbon dioxide
?
grams C.
2. How many grams of carbon dioxide contain 1.73 grams of O ?
grams carbon dioxide.

Answer 1

1. 1.33 gram of carbon

2. 2.38g of carbon dioxide

Step-by-step explanation:

From the given information:

Total amount of CO₂ = 4.86 grams

Atomic mass of C = 12 g/mole

molar mass of CO₂ = 44 g/mole

∴

The mass of the Carbon (C) in grams is:

`= Total\ amount \ of \ CO_2 * (12 \ g/mol)/(44 \ g/mol)`

`= 4.86 \ g * (12 \ g/mol)/(44 \ g/mol)`

= 1.33 gram of carbon

2.

Here, the total amount of CO₂ = unknown

Atomic mass of O₂ = 32 g/mole

molar mass of CO₂ = 44 g/mole

amount of oxygen = 1.73 g

∴

The mass of CO₂ =
`Total \ amount \ of \ O_2 * (44 \ g/mol)/(32\ g/mol)`

`=1.73 * (44 \ g/mol)/(32\ g/mol)`

= 2.38 g of carbon dioxide