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Calculate the ph change when 25 ml of 3.0 M HCl are added to 500 ml of a solution that is 0.10 M CH3COO- and 0.10 M CH3COOH
what is the correct electron configuration for Cr (chromium). Chose the proper Lewis dot structure for the compound or poliatomic ion: Sulfur Dioxide (SO2).
Calculate the number of molecules in 37.0 mL of ethanol, CH3CH2OH. The density of ethanol is 0.789 g/mL.
A bottle contains 175 m: of insulin at a concentration of 20.0 mg/ml . What is the total mass of insulin in the bottle?
an aqueous CaCl2 solution has a vapor pressure of 81.1 mmHg at 50 C. The vapor pressure of pure water at this temperature is 92.6 mmHg.
A mass of mercury occupies .750L. What volume would an equal mass of ethanol occupy if mercury's density is 13.546 g/mL and the density of ethanol is .789 g/mL?
Assume that the aluminum atoms can be represented as spheres, as shown in the drawing (Part C figure) . If each {rm Al} atom has a radius of 1.43 {rm AA}, what is the length of a side of the unit cell?
the elemental mass percent composition of ascorbic acid (vitamin C) is 40.92% C, 4.58% H, and 54.50% O. Determine the empirical formula
If a bottle of nail polish remover contains 153 g of acetone, how much heat would be released by its complete combustion?
Determine the grams of fat, protein, and carbohydrate in one serving. Determine the number of "food calories" (Cal) per gram of fat, protein, and carbohydrate
How many grams of CO are needed to react with an excess of Fe2O3 to produce 558 g Fe? The equation for the reaction is: Fe2O3(s) + 2 CO(g) → 3 CO2(g) + 2 Fe(s)
A 50.0 mL sample of 0.40 M benzoic acid, C6H5COOH, a weak monoprotic acid, is titrated with 0.48 M NaOH. Calculate the pH at the equivalence point. Ka of C6H5COOH = 6.5 10-5
Among the elementary subatomic particles of physics is the muon, which decays within a few nanoseconds after formation. The muon has a rest mass 206.8 times that of an electron. Calculate the de Broglie wavelength associated with a muon traveling..
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