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A solution of household bleach encloses 5.25% sodium hypochlorite, NaOCl by mass. Presuming that the density of bleach is the same as water, compute the volume of household bleach that must be diluted with water to make 500.0mL of a pH = 10.00 solution.
Mining engineers often have to deal with gases when planning for the excavation of coal. Some of these gases, including methane, can be captured and used as fuel to support the mining operation.
What is the % Yield of the reaction if a student reacted 2.00 g of salicylic acid with excess acetyl chloride and after extraction and recrystallization the mass of aspirin was 1.45 g
solution has an osmotic pressure of 3.80torr at 35?C. What is the molar mass of the protein?
A student is synthesizing aspirin in a laboratory. Using the amount of limiting reactant, she calculated the mass of aspirin that should form 10.31g. When she weighed her aspirin product on the balance, its mass was 3.70g. Calculate the percent yi..
How many grams of O2 will dissolve in 1.75L of H2O that is in contact with air where partial pressure of O2 is 0.209atm?
Suppose a mixture of two solutions is prepared by mixing 105.-mL of 0.0335 M solution with 35.0-mL of 0.932 M of the same solute (Z). What is the concentration of Z in the combined solution
using a sample of gas where 2.0 atmnbsp is the pressure exerted by a gas while it has a volume 350 cm3 now you need to
In an acid base titration a 25mL portion of a solution containing sulfuric acid (H2SO4) was titrated with a 0.200M NaOH(aq). write the chemical equation for this particular titration
For an alloy that consists of 90.1 g copper, 102 g zinc, and 5.92 g lead, what are the concentrations of (a) Cu (in weight percent), (b) Zn (in weight percent), and (c) Pb (in weight percent). The atomic weights of Cu, Zn, and Pb are 63.54, 65.39,..
calculate the equilibrium pressure of N2O4(g) and NO2(g). (c) What percentage (by moles) of the original N2O4(g) is dissociated at the new equilibrium position (total pressure = 1.00 atm)?
Define what is the pH of the solution when 18.30 mL of 0.137 M trisodium hemimellitalate (trisodium benzene 1,2,3, tricarobxylate) is mixed with 25.00 mL of 0.274 M HNO3 (to two d.p.)
A student heated a 4.901 g sample of hydrated iron chloride. After heating, the anhydrous iron chloride has a mass of 3.010 g. Calculate the percentage by mass of water in the hydrated compound.
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