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Ch.4 - Chemical Reactions and Chemical Quantities

Chapter 4, Problem 43c

Find the limiting reactant for each initial amount of reactants. 2 Na(s) + Br2( g) → 2 NaBr(s) c. 1.5 mol Na, 2.1 mol Br2

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Hi everyone today. We have a question asking us to identify the limiting reactant, given 3.25 moles of potassium and 5.50 moles of chloride as initial reactant for the reaction to potassium plus chloride chlorine forms to potassium chloride. So we are going to start off with our 3.25 moles of potassium And we're going to multiply it by our multiple ratio, so by two moles of potassium chloride, Divided by two moles of potassium, Gives us 3.25 moles of potassium chloride. And next we have our chlorine, we have 5.50 moles of chlorine. We're going to multiply by our multiple ratio. So two moles of potassium chlorine chloride over one mole of chlorine and that gives us 11 moles of potassium chloride. This is our lowest number. So that will be our limiting re agent. So potassium is our limiting re agent. Thank you for watching. Bye.
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Suppose you want to dissolve an aluminum block with a mass of 11.3 g. What minimum mass of H2SO4 (in g) do you need? What mass of H2 gas (in g) does the complete reaction of the aluminum block produce?

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For each of the reactions, calculate the mass (in grams) of the product that forms when 15.39 g of the underlined reactant completely reacts. Assume that there is more than enough of the other reactant. d. 2 Sr(s) + O2(g) → 2 SrO(s)

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Find the limiting reactant for each initial amount of reactants. 4 Al(s) + 3 O2( g) → 2 Al2O3(s)

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Textbook Question

Consider the reaction: 2 CH3OH(g) + 3 O2( g) → 2 CO2( g) + 4 H2O(g) Each of the molecular diagrams represents an initial mixture of the reactants. How many CO2 molecules form from the reaction mixture that produces the greatest amount of products?

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