Saturday
May 25, 2013

# Posts by jarrod

Total # Posts: 28

Chemistry
Mg(s) + 2 HCl(aq) --> MgCl2(aq) + H2 (g) DeltaH= -4.6x10^2 kJ How much heat is evolved when 0.598 g of Mg are dissolved in excess HCl? I'm not sure how to go about this problem. What I thought to do was: 0.598 g x 1 mol Mg/24.31 g Mg x 2 mol HCl/ 1 mol Mg x 36.46 g HCl/...

Chemistry
Okay I believe I got it, thank you so much for the help! :)

Chemistry
I tried doing it that way already but it just doesn't look correct, because I set up PV=nRT to n=PV/RT. Entering the numbers I would get ((0.0658 atm)(0.2853))/((0.08206 L*atm/K*mol)(315K)) and I would get 0.000726 moles. After that would I just go straight to the number o...

Chemistry
Consider the following reaction: 2 SO2 (g) + O2 (g)----> 2 SO3 (g) If 285.3 mL of SO2 is allowed to react with 158.9 mL of O2 (both measured at 315 K and 50.0 mmHg), what is the limiting reactant and theoretical yield of SO3 in moles? If 187.2 mL of SO3 is collected (measur...

math
I am not sure how to write a fraction as an expression using a negative number for an exponent other than -1? Please help ex: 1/25 and then using a fraction of 1/9to the second power.

Western Civilization
Thank you, come again!

Western Civilization
I have five questions asked here. Feel free to answer just one of them, only, please use the numbering system I have set up here. Thanks so much! 1. Why do you think World War Two erupted so soon after World War One, which was supposed to have been “The War to End All War...

Western Civiliztion
In 1875, which of these four political philosophies best addresses the political realities of Europe? Why? ----------------------------------- 1. A group of Austrian conservatives, adherents to the principles advocated by Prince Clemens von Metternich: Our best model for a goo...

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