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Renee Evans

Renee E.

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Preeti Kumari verified

Numerade educator

Calculate the amount of solute needed to prepare the following solutions. 120 mL of a 38.3 % (m/v) LiNO3 solution. Express your answer in grams using two significant figures.

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Felicia Rivera verified

Numerade educator

If the bottle of mouthwash contains 300 mL , what is the volume in milliliters of the alcohol?

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INSTANT ANSWER

Calculate the volume in milliliters of a 2.15 M K2SO4 solution to obtain 2.05 mol of K2SO4.

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INSTANT ANSWER

Calculate the volume in liters of a 3.90 M KCl solution to obtain 0.30 mol of KCl.

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INSTANT ANSWER

You need 560. mL of a 15 % (m/v) glucose solution. If you have a 25% (m/v) glucose solution on hand, how many milliliters do you need? Express your answer to two significant figures and include the appropriate units.

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ANSWER IN PROGRESS

A doctor orders 100. mL of 4 % (m/v) ibuprofen. If you have 10. % (m/v) ibuprofen on hand, how many milliliters do you need? Express the volume to two significant figures and include the appropriate units.

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Ashwin Banarsee verified

Numerade educator

The concentration of PCl3(g) is increased to 1.2 M, disrupting equilibrium. Calculate the new ratio of products to reactants with this higher concentration of phosphorus trichloride. Assume that the reaction has not yet regained equilibrium. Express your answer using two significant figures.

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ANSWERED

Ashwin Banarsee verified

Numerade educator

Given the concentrations, calculate the equilibrium constant for this reaction: PCl3(g) +Cl2(g)?PCl5(g) At equilibrium, the molar concentrations for reactants and products are found to be [PCl3]=0.20 M, [Cl2]=0.25 M, and [PCl5]=1.20 M. What is the equilibrium constant (Kc) for this reaction? Express your answer using two significant figures.

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ANSWERED

Ashwin Banarsee verified

Numerade educator

Given the concentrations, calculate the equilibrium constant for this reaction: PCl3(g) +Cl2(g)?PCl5(g) At equilibrium, the molar concentrations for reactants and products are found to be [PCl3]=0.20 M, [Cl2]=0.25 M, and [PCl5]=1.20 M. What is the equilibrium constant (Kc) for this reaction? Express your answer using two significant figures.

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Jennifer Hudspeth verified

Numerade educator

In a gas mixture, the partial pressures are nitrogen 430 Torr , oxygen 125 Torr , and helium 220 Torr . What is the total pressure (in torr) exerted by the gas mixture?

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