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A laboratory test for gastric acidity calls for 0.1 NaOH. Prepare 40.0mL of a 10X stock solution of this reagent using two NaOH solutions, one labeled 20% and the other 0.75N. How much 20% NaOH and 0.75N NaOH must be mixed together to produce 40.0mL of 10X stock?
Suppose that, from measurements in a microscope, you determine that a certain bacterium covers an area
After comparing max absorbance to reference values, the manual states "make a table of the expected results and the deviation from the standard.
The electrolysis of molten Al2O3 at 980 ºC is used to produce metallic aluminum. A current of 360 A is used in the electrolysis cell. What is the rate of formation of aluminum, in kilograms per hour?
A piece of gold foil has a volume of 0.645cm^3. If the piece of gold measure 10.0 cm by 12.5cm, what is the thickness of the foil
for a certain change the value of U is -2.37 kJ. During the change, the system absorbs 650 joules. how much work did the system do.
Which term is used to describe mechanism of reaction of 4-methy-2-pentene with sulfuric acid and water as a solvent to produce pantanol. a)tertiary carbanion b)2-methylpentoxonium c)sp hybridized pentyne d)vicinal dihydroxide e)hydroxide ion
A NaCl solution contains 20.0% NaCl by mass and has a density of 1.15 g/mL. The molarity of the solution is: (hint: assume 1000. g of this solution)
Write an essay on organic chemistry - Please include credible references and follow APA format.
What mass (in grams) of solid Na2SO4 would need to be added to 250 grams of water to make an ideal solution with a boiling point of 103.6°C. (Kb for water is 0.512°C/m)
A scientist wants to make a solution of tribasic sodium phosphate, for a laboratory experiment. How many grams of will be needed to produce 375 of a solution that has a concentration of ions of 1.10
What mass of sucrose should be combined with 474 g of water to make a solution with an osmotic pressure of 8.20 atm at 310K ?
a 0.573g sample of nonvolatile solute is added to 15.6g of naphthalene and the mixture warmed until melted. the
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