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Chemistry Answers  

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Grams-moles

How would I convert grams into moles, and vice versa? Please make is as simple as possible! Thanks!

Chemistry Help Please!

Part A. Phosgene (carbonyl chloride), COCl2, is an extremely toxic gas that is used in manufacturing certain dyes and plastics. Phosgene can be produced by reacting carbon monoxide and chlorine gas...

Chemistry Help Please!

For the reaction: CO(g)+NH3(g)<->HCONH2(g) The equilibrium constant is: K=0.207 at 400 K. If a reaction vessel is filled with initial concentrations 2.15M of CO and 2...

Chemistry Help Please!

The reversible chemical reaction: A+B<->C+D has the following equilibrium constant: Kc=[C][D]/[A][B]=4.1.   (a) Initially, only A and B are present, each at 2.00 M. What...

How to solve this?

Calculate the density of Helium, He, in grams per liter at 21 degrees C and 752 mmHg. The density of air under these conditions is 1.188 g/L. What is the difference in mass between 1 liter of air...

May I have help solving this?

A vessel containing 39.5 cm3 of helium gas at 25 degrees C and 106kPa was inverted and placed in cold ethanol. As the gas contracted, ethanol was forced into the vessel to maintain the same pressure...

Help on science please

I need help with these questions:   1. Use the reaction that occurs when magnesium burns in oxygen to show how a reaction might be included in more than one category of reaction.   2...

Chemistry problem about pH.

Can anyone help me with this problem? I can't get the answer, there must be something wrong in my reasoning, thank you so much!   "Calculate the pH of a solution obtained by adding...

Chemistry Help Please!

The rate of reaction in terms of the "rate law expression" includes the rate constant (k), the concentration of the reactants, and the orders of the reaction with respect to the different...

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