A 0.15 g sample of a purified protein is dissolved in water to
2.0ml of solution....
A 0.15 g sample of a purified protein is dissolved in water to
2.0ml of solution. The osmotic pressure is found to be 18.6 torr.
Calculate the molar mass of the protein.
A 29.0-g sample of NaOH is dissolved in water, and the solution
is diluted to give a final volume of 1.60 L. The molarity of the
final solution isA) 18.1 M B) 0.453 M C) 0.725 M D) 0.0552 M E)
0.862 M
Consider a sample that has 121.6 g of K2SO4 dissolved in water
to make a solution that is 1.31 L. When responding, please only
input your numeric value with three significant figures. No units.
1). What is the molarity of the compound in this sample? 2). What
is the molality of the compound in this sample? Density of the
solution is 1.06 g/mL. 3). Based on the dissociation reaction for
K2SO4, determine the Van’t Hoff Factor (i). 4). What is...
A 0.9140 g sample of a mixture of NaCl and KCl is
dissolved in water, and the solution is then treated with an excess
of AgNO3 to yield 1.943 g of AgCl.
Calculate the percent by mass of each compound in the
mixture.
A 0.9000 g sample of a mixture of NaCl and KCl is dissolved in
water, and the solution is then treated with an excess of
AgNO3 to yield 1.923 g of AgCl. Calculate the percent by
mass of each compound in the mixture.
____% mass of NaCl
____% mass of KCl
- A 35.0 g sample of ethylene glycol, HOCH2CH2OH is dissolved in
500 g of water. The vapor pressure of water at 32 C is 35.7 mmHg,
What is the vapor pressure of the water/ethylene glycol solution at
32 C?
- What is the Boiling Point of the solution resulted from the
dissolving of 32.5 g of sugar (C6H12O6) in 250.0 g of water?
- . A 1.07 mg sample of a compound was dissolved in 78.1 mg of
camphor....
A sample containing acetaminophen was dissolved in water to make
a 50.00-mL solution. The solution was titrated with 0.5065 M NaOH,
and the equivalence point was reached when 26.10 mL NaOH solution
was added.
The terminal hydrogen (on the OH) is removed during
neutralization. The Ka value of acetaminophen is 3.2 × 10−10.
Calculate the pH at the equivalence point.
0.4857 g of KHP was dissolved in water and titrated with a
solution NaOH of unknown Molarity. A volume of 20.35 mL of NaOH
solution was required to reach the endpoint. Two more runs with
0.4449 g and 0.4701 g of KHP required 19.04 and 19.73 mL of the
NaOH respectively.
a)Calculate the mL of NaOH/g KHP for each run.
b)Find the mean, standard deviation, and CV
c) The fourth run with 0.4501 g of KHP needed 18.89 mL of...
An unknown mass of sodium hydroxide is dissolved in 500 g of
water. This solution is neutralized by adding successively 18 g of
CH3COOH, 25.2 g HNO3, and 29.4 g of H2SO4. Determine
a) the mass of NaOH
b) the mass of H2O in the neutral solution.
When a 7.00-g sample of RbBr is dissolved in water in a
calorimeter that has a total heat capacity of 1.931 kJ·K–1, the
temperature decreases by 0.480 K. Calculate the molar heat of
solution of RbBr.
A mixture contains only and . A 4.51-g sample of the mixture is
dissolved in water and an excess of is added, producing a
precipitate of . The precipitate is filtered, dried, and weighed.
The mass of the precipitate is 1.06 g. What is the mass percent of
in the sample?
%