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What is the pH of a hypobromous acid/sodium hypobromite buffer in which the concentration of the weak acid component is 0.068 M and the concentration of the conjugate base is 0.074 M? Hypobromous acid [HOBr] = Ka=2.50e-9.
In a research 2.060 g of silicon dioxide is reacted with 3.488 g of hydrogen fluoride gas according to the equationSiO2 + HF ==> SiF4 + H2O.
bring 5ml of bromophenol blue to your work station. obtain a P20 Pipetman and record below the digits you see in the window on the side. What volume is the micropipette set to deliver
calculate the osmotic pressure of a magnesium citrate laxative solution containing 30.0 g of magnesium citrate in 251
Liquid dimethyl disulfide (CH3SSCH3) flows through a pipe with a mass flow rate of 29.0 g/s. Given that the density of dimethyl disulfide
Phosphorus pentachloride is used in the industrial preparation of organic phosphorus compounds. Equation 1 shows its preparation from PCl3 and Cl2. (1) PCl3(l) + Cl2(g) PCl5(s) Use equations 2 and 3 to calculate H°rxn of equation 1
A solution is to be prepared with a sodium ion concentration of 0.33 mol/L. Explain what mass of sodium sulfate (g) is needed to prepare 1.22 liters of such a solution
If ammonia gas as well as 0.365 g of hydrogen chloride gas react to give 0.535 g of solid ammonium chloride, explain what is the mass of ammonia that reacted as well as how would you write a balanced chemical equation for this change
ammonia is completely decomposed to nitrogen and hydrogen, as in question B). At the end of the experiment the pressure of gas mixture is 866mmHg. calculate the partial pressures of N2 and H2.
Obtain an expression relating the shear stress, s, and the shear strain, g, assuming g=larmda-1/larmda. Comment on the difference between this stress/strain relationship and the one for simple elongation.
For pressures up to about 50 bar the equation of state PV = n (RT- (0.072 L/mol) P) with P in bars as well as V in liters for CO2 at 100°C is adequate. Compute the fugacity as well as the fugacity coefficient of CO2 (g) at 100°C as well as 37.5 ba..
Commercial concentrated aqueous ammonia is 28% NH3 by mass and has a density of 0.90 g/ml . What is molarity?
Why do some scientists have concerns have regarding further increases in bio fuel production. giving chemical reasons explain why is is expensive to manufacture ethanol from cellulose.
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