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If 0.231 mol of potassium fluoride (KF) is dissolved in 50.3 g of water, how much will the freezing point be lowered? (17.1°C)
Five grams of compound A is dissolved in 90 mL of water. The distribution ratio for compound A between chloroform and water is 15. How much of compound A will be in chloroform if you extract it from water once with 90 mL of chloroform?
The iron in an organometallic compound was determined by treating a 0.5324 g sample with HNO3 and heating to volatilize the organic material. After ignition, the residue of Fe2O3 weighed 0.1982 g.What is the %w/w Fe in this compound?
Answer and show all work for part a,b,c, and d (dont leave out any parts)
A new weak acid, HG, has been synthesized. The a titration of 0.115g of HG requires 16.00 mL of 0.10 M KOH solution to reach the equivalence point.
(a) Write the dissociation equation for HG in water and its equilibrium expression (Ka).
(b) Write the net ionic equation for the titration reaction.
(c) Calculate the molar mass of HG.
(d) After 8.00 mL of the base is added, the pH of the solution is 6.20. What is the value for the Ka of HG?
a golf ball with a mass of 0.060 kg is subjected to an impulse that causes it to move with a velocity of 60m/s. If the golf club and the ball are in contact for 0.0050 s,what is the average net force that acts on the ball?
A method is used to prevent rusting in ships and underground pipelines involves connecting the iron to a block of a more active metal such as magnesium. This method is called cathodic protection. How many moles of magnesium are present in 1 billion (1 * 109) atoms of magnesium?
what volume does 81.2 of CH4 occupy at 5.5° celcius and 31 kPa
A gas occupies 25.32 liters at a pressure of 53.12 mmHg. What is the new volume when the pressure is increased to 98.44 Round your answer to the hundredths place 2 decimal places). Show your work on a separate sheet of paper . P 1 V 1 T 1 = P 2 V 2 T 2
Normal blood pressure for humans is 108.09 . What is this pressure in atm? Round you answer to the hundredths place (2 decimal places)
What is the pH of of a solution of 0.60 M ammonium chloride ?
