Is there a chemistry teacher for jiskha? Or someone that knows what my teacher is talking about? :’(

He wants me to:

Calculate the number of moles of CO2 in 63.0g of CO2

I am a retired university prof.

mols = grams/molar mass = ? = 63/44 = ?

Co2= 63/44=1 19/44.... did I solve the (?) correctly? I feel as if I didn’t.

Yes and no.

If I put 63/44 into my calculator I get 1.48. As a fraction, 63/44 is exactly what you have. 1 19/44 fraction notation is 1.48 in decimal notation. So you didn't do anything wrong. However, USUALLY, we use decimal notation. Use your calculator to do that. Thanks for using Jiskha.

Oh okay thank you and sorry. I have 2 types of apps for calculating things. One helps do fractions and the other puts it in decimal form. But thank you for explaining where I went wrong.

Sure! I can explain how to calculate the number of moles of CO2 in 63.0g of CO2.

To do this, you need to know the molar mass of CO2. The molar mass is the mass of one mole of a substance, and it is calculated by adding up the atomic masses of all the atoms in the formula.

The formula of CO2 (carbon dioxide) consists of one carbon atom (C) and two oxygen atoms (O). The atomic mass of carbon is approximately 12.01 g/mol, and the atomic mass of oxygen is approximately 16.00 g/mol. So, the molar mass of CO2 can be calculated as:

Molar Mass of CO2 = (1 * atomic mass of carbon) + (2 * atomic mass of oxygen)
= (1 * 12.01 g/mol) + (2 * 16.00 g/mol)
= 12.01 g/mol + 32.00 g/mol
= 44.01 g/mol

Now that we know the molar mass of CO2 is 44.01 g/mol, we can calculate the number of moles of CO2 in 63.0 g of CO2 using the formula:

Number of moles = Mass of substance / Molar mass

Number of moles = 63.0 g / 44.01 g/mol

Calculating this will give us the number of moles of CO2 in 63.0 g of CO2.