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(1) The levels of plasma glucose of a healthy human fluctuates between 70-140 mg/dL. For this problem use an average of 105 mg/dL for the concentration of plasma glucose. Using this information, how much glucose is in 2.4 L of plasma of a healthy human?
(2) You need a 0.19 M solution of NaCl (MW 58.443), but you only have 1.381 g of NaCl. What volume of 0.19 M NaCl can you make with the NaCl you have?
(3) What volume of a 10× stock solution of 1%(w/v) sucrose would you Q.S. to 12 mL with water to make a 8 mg/mL solution of sucrose?
(4) You have 55 mL of a 6 mg/mL glucose solution that you dilute 1/9 with water. What is the concentration of glucose in this diluted solution?
Determine the freezing point of a solution that contains 62.8 g of urea (CH4N2O) dissolved in 275 g of water (Kf = 1.85 degree C/m)
How many kilojoules are released when 10.0g of steam condenses at 100 degrees C and cools to 0 degrees C?
constant current of 101.0{\rm A} is passed through an electrolytic cell having an impure copper anode, a pure copper cathode, and an aqueous {\rm CuSO_4} electrolyte.
Magnesium combines with chlorine, Cl2, to form magnesium chloride, MgCl2, during a synthesis reaction. a) Write a balanced chemical equation for the reaction.
Find the mass of urea (CH4N2O) needed to prepare a 50.2g of a solution in water in which the mole fraction is 7.51*10^-2.
In which of the following are there more than eight electrons in the valence shell of the central atom
The final temperature of the mixture is 27.0 degrees C. What is the heat capacity of the unknown substance. Express the answer in TWO significant figures.
A weather balloon is filled to 125 L when the atmosphereic pressure is 748 mm Hg and the air temperature is 28 degrees celcius. It rises to where the atmospheric pressure is 787mm Hg and the temperature
a 1.00 ml sample of dilute acetic acid required 23.4 ml of 0.10 m sodium hydroxide solution to titrate the sample to a
We titrated each layer with 0.10 NaOH and found that 1. took 2.57 mL of NaOH to titrate and 2. took 0.08 mL of NaOH to titrate. What is the concentration of acid in 1 and 2?
what is the theoretical mass of xenon tetrafluoride that should form when 130 g of xenon is reacted with 100 g of f2?
Draw the structures of the products of the neutralization reaction between pyridine and propanoic acid. Include lone pairs on the appropriate atoms.
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