# Stoichiometry Help

by gokugreene
Tags: stoichiometry
 P: 47 Hey could you guys tell me whether I am on the right track with this or not. First Problem: A tablespoon of sugar, $$C_1_2H_2_2O_1_1$$, weighs 2.85g. A.) How many moles of sugar are there in a tablespoon? Do I calculate the molar mass of sugar in grams and then divide 2.85g by the molar mass? To give me the moles? Also, if I were to calculate how many grams of O there are in 2.85g of sugar would I just multiply the number of moles in 2.85g of sugar by the molar mass of oxygen times the number of oxygen atoms? Second Problem: Sample A is $$1.555~x~10^{-5}$$ mole of $$AlK (SO_4)_2~12H_2O$$ A.) How many grams of O are present? Do I start by multipliying $$1.555~x~10^{-5}$$ by the molar mass of $$AlK (SO_4)_2~12H_2O$$?? Thanks
 Emeritus Sci Advisor PF Gold P: 11,154 double-post. Question answered in homework help (K12).

 Related Discussions Biology, Chemistry & Other Homework 7 Biology, Chemistry & Other Homework 1 Biology, Chemistry & Other Homework 19 Chemistry 2 Introductory Physics Homework 0