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The sides of a triangle measuring 40 m, 32 m, and 16 m increase at the rates of 2 m/s, 5 m/s, and 3 m/s, respectively. How fast is the area of the triangle changing?
a. 138.42 m^2/s
b. 113.69 m/s
c. 127.33 m^2/s
d. 113.69 m^2/s
Stronger the oxidizing agent, greater is the
A 2.00 g sample of an iron ore is dissolved in acid and then reduced to Fe²⁺. It was then titrated against 0.025 M KMnO₄ solution and used 47.5 mL to reach the end point. Calculate the %Fe₃O₄ (231.54 g/mol) of the ore sample.
A 2.00 g sample of an iron ore is dissolved in acid and then reduced to Fe²⁺. It was then titrated against 0.025 M KMnO₄ solution and used 47.5 mL to reach the end point. Calculate the %Fe₃O₄ (231.54 g/mol) of the ore sample.
The end point in a titration of a 50.00 mL sample of HCl solution was reached by the addition of 35.23 mL of 0.250 M NaOH. What is the molarity of the HCl sample?
Hydrogen is prepared commercially by the reaction of methane and water vapor at elevated temperatures.
CH4 (g) + H2O (g) ⇌ H2 (g) + CO (g)
What is the equilibrium constant for the reaction if a mixture at equilibrium contains gases with the following concentrations, at a temperature of 760 °C?
CH4 = 0.126 M
H2O = 0.242 M
CO = 0.126 M
H2 = 1.15 M
4. A combustion reaction wherein 15.0 g of propane (C3H8) is burned with 75.0 g of oxygen (O2).
a. Determine the limiting reactant.
b. What is the maximum amount of CO2 (g) can you produce?.
What is the concentration of NaCl in a solution if titration of 15.00 mL of the solution with 0.2503 M AgNO3 requires 20.22 mL of the AgNO3 solution to reach the end point?
AgNO3 (aq) + NaCl (aq) ⟶ AgCl (s) + NaNO3 (aq)
1. How do you prepare a 250-mL of 0.125 M NaOH solution? Show your calculations and the methods/steps needed to prepare the solution.
a. From solid NaOH pellets (by dissolving)
[Calculate the moles needed and convert it to grams]
b. From a solution of 0.745 M NaOH (by dilution)
How do you prepare a 250-mL of 0.125 M NaOH solution? Show your calculations and the methods/steps needed to prepare the solution.
a. From solid NaOH pellets (by dissolving)
[Calculate the moles needed and convert it to grams]
b. From a solution of 0.745 M NaOH (by dilution)
