## Chiomatn93 3 years ago Consider the following unbalanced reaction: C(s) + S8(s) → CS2(l) How many grams of carbon disulfide will be produced if 8.80 g of C and 17.2 g of S8 are allowed to react completely? Report your answer to 3 significant figures and do not include units.

1. aaronq

do you know what units you use in stoichiometric problems?

2. Chiomatn93

in this case g CS2

3. Chiomatn93

MOLEES?

4. aaronq

nope you ALWAYS use moles

5. Chiomatn93

OK

6. aaronq

so to solve this problem: (1) balance the reaction (2) convert grams of reactants to moles of reactants ...moles=mass/molar mass (3) determine limiting reactant (whichever one you have less of will determine how much product you can make) (4) use the coefficients from the balanced equation to find how many moles of product you make (5) convert to grams ...again using n=m/M

7. aaronq

8. Chiomatn93

im stuck...im trying to convert the grams of the reactant to moles of reactant but im confused

9. aaronq

okay, so you know how many grams you have .. do you know each reactants molar mass?

10. Chiomatn93

molar mass of C=12.011?

11. Chiomatn93

Molar mass of CS2=76.141

12. aaronq

okay so use the formula n=m/M moles = mass / molar mass find the number of moles ie. divide the mass by the molar mass

13. aaronq

so for carbon m=(8.8g)/(12g/mol) = 0.733 mol

14. Chiomatn93

OK

15. Preetha

Aaron, really good work helping this learner!