Posted by **Annette** on Wednesday, March 21, 2007 at 5:33pm.

Will someone help me with this problem, please?

Calculate the mass in grams of 1.20*10^24 molecules of CO2.

Well, convert it to moles of CO2.

number moles= 1.2*10

^{24}/avagnumber

Now, you take the molecular mass of CO2 (12 + 2*16) and multiply that by the number of moles.

I got 8.772717608E47

is that the answer?

No.

the number of moles is 2. 2(44)= xxx grams.

Okay, sorry for not showing my work. So I did 1.2*10^24/6.02*10^23 and got 1.99 (2). So now I multipy 2 times the molecular mass of CO2, which is 44. The answer is 88. 88 grams?

Yes, I got the same answer the first time:8.772717608E47

For my calculator, 8.772717608E47 =88, for some reason. For another problem, the answer was 68.71g and my calculator read 6.871096346E47.

## Answer This Question

## Related Questions

- Chem (Help!) - I really need help answering these questions. A sample of CO2 gas...
- science - How many grams of Aluminum will react w/ 1 liter of a 1M solution of ...
- Derivatives - What is the fourth derivative of f(x)= e^-x^2. I got f''(x)=-2e^-x...
- Chemistry - mass-mass conversions and mass-mole conversions: what is the ...
- chemisry - How many grams are thee in 2.3times 10to the 23 power What units are ...
- Help! for Chemistry H.W. - I need help with my chem home work. Please show me ...
- Property of logarithms - Using property of logarithms, how do I prove derivative...
- Chemistry - Sorry for posting this again, I dont know if the question was ...
- chem - Assuming that you have 0.4g of Y(OH)3, calculate the mass of of BaO2 ...
- DrBOB222... the moles - This is what i did thus far I wrote the eqn and i sed 1 ...

More Related Questions