Homework Help: Chemistry

Posted by Lauren K. on Thursday, December 9, 2010 at 8:44pm.

Consider the following reaction:
H2O(l) + 3NO2(g) --> 2HNO3(l) + NO(g)

What volume of NO (in L) is produced starting from 1.80 g of water and 11.5 g of NO2 at 300 K and 1 atm? (use R = 0.0821 L atm/mol K).

I am completely confused :(

Chemistry - DrBob222, Thursday, December 9, 2010 at 9:42pm
This is a limiting reagent problem. How do I know that? Because BOTH reactants are given. The way you solve these is to wrote a stoichiometry problem using each reagent, see how much of the product will be formed, then take the smaller value as the correct number. Here is a worked example of a stoichiometry problem. Work it once (to the mole stage of the product) with the first reagent, then a second time (to the mole stage) using the second reagent. When the numbers don't agree, always use the smaller value.
Here is the example, just follow the steps.
http://www.jiskha.com/science/chemistry/stoichiometry.html

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