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Ik that you would use this equation to find a value such as moles when given temp pressure and volume. However, can you use this equation to get the moles of reactant then go to moles of product and then find the concentration of the product using the volume?
May I ask if the equation you're referring to is pV=nRT? If so, then you can use the equation to find concentration if you have the pressure and temperature. I don't think that you can use this equation to find the concentration/volume of both the reactants and the products, as the pressure or a certain value would have changed.
Probably not, usually you need to use an ice table to find moles or concentration of products given the moles or concentration of reactants. You can also sometimes just multiply it according to the ratio of their coefficients.
Assuming you are talking about the ideal gas law, in which case yes, you can use the equation to find a value like moles when given temperature, pressure, and volume. In regards to the second part of your question, I don't think you would be able to use the given equation to find initial and final concentrations without more information, I would probably use an ICE table, or the equation m1v1=m2v2 to solve for those quantities.
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