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What volume of glacial aceic acid (18M) and what weight of sodium acetate trihyddrate(CH3COONa.3H20) are required to make 100 ml of .2 M buffer at pH 4.5 (pKa of acetic acid is 4.74). please explain steps in detail and use units in asnwer
what mass of calcium metal could be obtained from one kg of limestone that is 50.0 pure
NaH2PO4 to make a buffer solution with a pH of 8.00?
1. what is the molality of a solution that contains 3.0g urea molecular weight 60 amu in 100g of benzene?2. calculate
What is the particular advantage to know the penetration depth of X-rays impinging upon the sample when performing XPS analysis.
carbon aldoses are there in the L-series? Enter just the numerical value, expressed as a whole number.
The system H2 (g) + I2 (g) ?? 2 HI(g) is at equilibrium at a ?xed temperature with a partial pressure of H2 of 0.200 atm, a partial pressure of I2 of 0.200 atm, and a partial pressure of HI of 0.100 atm.
A 498 mL sample of laughing gas, N2O, is at 30 oC and 414 torr pressure. (a) How many gas molecules are present? (b) How many atoms are there
I2(g) + Br2(g) 2IBr(g) Kc=8.7 x10 to the second at 150 degrees celcius, Suppose that 0.84 mol of I2 and 0.84 mol of Br2 are placed in a 3.000L flask and allowed to reach equilibrium at 150 degrees celcius. What are the equilibrium concentrations o..
A solid mixture consists of 35.7 of KNO3 (potassium nitrate) and 6.3g of K2SO4 (potassium sulfate). The mixture is added to 130. of water. If the solution described in the introduction is cooled to 0
A human body contains 6 liters of blood. The hemoglobin content of blood is about 15.5g/100 mL of blood. The approximate hemoglobin molecular weight is 64,500g/mol. How many moles of hemoglobin are present in a typical adult
Initially a mixture contains 0.760 mol each of N2 and O2 in an 8.26-L vessel. Find the composition of the mixture when equilibrium is reached at 3900°C. For the reaction below, the Kc = 0.0123 at 3900°C.
A solution of 75.0 g of benzene (C6H6) and 75.0 g of toluene (C7H8) has a total vapor pressure of 80.9 mmHg at 303 K. Another solution of 100.0 g benzene and 50.0 g toluene has a total vapor pressure of 93.9 mmHg at this temperature.
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