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A student placed 15.0 mL of glucose in a volumetric flask, added enough water to dissolve the glucose by swirling, then carefully added additional water until the 100 mL mark on the neck of the flask was reached. The flask was then shaken until the solution was uniform. A 20.0-mL sample of this glucose solution was diluted to 0.500 L . How many grams of glucose are in 100. of the final solution?
A flask contains 0.120 mol of liquid bromine, rm Br_2. Determine the number of bromine molecules present in the flask.
Calculate the value of w (work) for the following system if 20.2 g of NaN3 reacts completely at 1.00 atm and 22 °
What is the Zn2+: Cu2+ concentration ratio in the following cell 25 degrees if the measured cell potential
If 157 of wet is collected over water at 24 and a barometric pressure of 739 , how many grams of have been consumed? (The vapor pressure of water is 22.38 .)
for swimming 1500 m in a long course pool is 14 min 34.56 s. At this rate, how many seconds would it take to swim 0.650 miles? (1 mi = 1609 m.)
How many cubic centimeters are in an 8.00 oz bottle of cough medicine? (1.00 oz=29.6 mL)
the specific heat of ethylene glycol is 2.42 j/k-g. How many j of heat are needed to raise the temperature of 62.0 g of ethylene glycol from 13.1°c to 40.5°c?
what effect (shift to the right or left) does an increase in the temperature have on each of the following systems at equilibrium
Describe and explain four ways in which and industrial chemist could increase the yield of nitrous oxide.
At 250C, the equilibrium constant Kp for the reaction PCl5(g) PCl3(g) + Cl2(g) is 1.80. Sufficient PCl5 is put into a reaction vessel to give an initial pressure of 2.74 atm at 250C. Calculate the pressure of PCl5 after the system has reached equi..
A balloon filled with helium gas has a volume of 500 mL at pressure of 1 atm. The balloon is released and reaches an altitude of 6.5 km, where the pressure is 0.5 atm.
What mass of HClO4 should be present in 0.600 L of solution to obtain a solution with each of the following pH values pH = 2.70? pH = 1.70? pH = 0.60
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