# chemistry help!!! please!!! DrBob222 I need you!!

posted by emma

How many atoms of carbon are needed to produce 0.45 mol Al?

3C + 2Al2O3 4Al + 3CO2

A. 2.6 × 1026 atoms
B. 9.7 × 1024 atoms
C. 3.0 × 1022 atoms
D. 2.0 × 1023 atoms

1. DrBob222

I answered this for you yesterday. You can go back and find my answer. Here are the instructions although my post yesterday was different than this (but the same answer).
Convert 0.45 mol Al to mols C needed. Use the coefficients in the balanced equation for this.
Convert mols C needed to atoms C remembering that 1 mol C will contain 6.02E23 atoms C.

2. DrBob222

http://www.jiskha.com/display.cgi?id=1471635474

3. emma

i get d. is this correct?

4. DrBob222

right

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