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How many moles of NaBrO should be added to 1 l of 0.200 M hypobromous (HBrO) acid to obtain a buffer of pH 8.80 (assume no volume change occurs when solid NaBrO is added)? The pka of the acid is 8.70.
how many moles are present of an ideal gas at the following conditions: 1.0 atm, 25.0 C, and occupying 22.4 L, The Lewis structure for PF3 shows that the central phosphorus atom has _______ nonbonding and
solution made from 6.50g of an unknown compound in 27.8g of diphenyl has a molality of .195m. Calculate the molar mass of the unknown.
diatomic oxygen to form nitric oxide and water vapor: 4NH3 + 5O2 > 4NO + 6H2O When 20.0 g NH3 and 50.0 g O2 are allowed to react, which is the limiting reagent? How much water is produced and how much is left of the excess reagent
Which of the 20 standard amino acids would be best to use to create a buffer at pH = 8.6 and why?
Calculate the range of pH values for which Mg(OH)2 will not precipitate but Fe(OH)3 will. Assume the solution is 0.0500 M
What is the pH of a solution obtained by mixing 50mL of 0.02 M sodium acetate with 40mL of 0.01 M HCl.
Calculate the ratio of NaF to HF required to create a buffer with pH = 4.10. Calculate the ratio of CH3NH2 to CH3NH3Cl required to create a buffer with pH = 10.22
53.5 g of an ideal gas of molecular weight = 30.5 g/mol are confined at a pressure of 133 mmHg. The density of the gas is 0.228 g/L. Compute the temperature of the gas in degrees Celsius.
A second 1.0 mL sample is spiked with 2.0 microliters of a 1000 ppb Pb2+ standard and diluted to 5.0 mL, yielding an Sspike of 0.4. Determine the concentration of Pb2+ in the original sample of blood.
Analysis of a carbohydrate showed that it consisted of 40.0 % C, 6.71 % H and 53.3 % O by mass. Its molecular mass was found to be between 140 and 160 amu. What is the molecular formula of this compound?
Amides undergo hydrolysis to carboxylic acids on treatment with alkali. Diagram a suitable mechanism for the conversion of benzamide to benzoic acid
use the appropriate standard reduction potentials to calculate the value of k at 25 degrees celcius for this reaction
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