GOB Chemistry
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A 191.27-proof rectified spirit is an alcohol solution that contains 95.635% (v/v) ethanol. The proof of an alcoholic substance is equivalent to two times its alcohol content. Determine the volume, in milliliters, of ethanol present in 500.00 mL of rectified spirit.
The ascorbic acid recommended daily intake for a 13-year-old child is 0.0450 grams. To meet the recommended daily intake for a 13-year-old child, how many liters of ascorbic acid syrup that contains 2.00% (m/v) ascorbic acid should be given?
Codeine (C18H21NO3) is a compound that increases tolerance to pain. A sample of codeine weighing 15.0 g is dissolved in 95.0 g of water. The density of the resulting solution is 1.03 g/mL. Calculate the total volume, in milliliters, of the solution.
A child drinks a glass of milk with 0.131% calcium (m/v) daily. If the glass has a volume of 250. mL, how many grams of calcium does the child consume in 5 days?
How many milliliters of HCl are needed to prepare 355 mL of a titration mixture for detecting residual chlorine in water analysis that is 10.0% (v/v) HCl solution?
Pavy's solution, a glucose reagent, contains 30.0% (v/v) ammonium hydroxide (NH4OH). What is the volume (in milliliters) of NH4OH in 475 mL of Pavy's solution?
What is the mass/volume percent (m/v) of the solute MgCl2 if a 50.0 mL sample of MgCl2 solution contains 8.00 grams of MgCl2?
Two solutions are stored separately in glass bottles: 7.00% (m/v) methyl pyruvate solution and 7.00% (m/m) methyl pyruvate solution. Determine the difference between them.
There are two solutions: 2.00% (m/v) chloroform solution and 2.00% (m/m) chloroform solution. What is the difference between them?
Amoxicillin is used to treat a number of bacterial infections. Calculate the volume of 1.0% (m/v) solution required to obtain 2.5 mg of amoxicillin.
Calculate the amount of solute (in moles) needed to prepare a 500.0 mL solution of 2.6% (m/v) CuSO4 (MW = 159.60 g/mol).
Calculate the concentration (in % m/v) of a 120.0 mL solution containing 0.129 mol glucose (C6H12O6).
Provide the steps in preparing 250.0 mL of a 1.5% (m/v) NaOH solution.