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A student placed 18.0 g of glucose (C6H1206) in a volumetric flask, added enough water to dissolve the glucose by swirling, then carefully added additional water until the 100.- mark on the neck of the flask was reached. The flask was then shaken until the solution was uniform. A 40.0-mL sample of this glucose solution was diluted to 0.500 L. How many grams of glucose are in 100 mL. of the final solution?
Designing and preparing aqueous buffer solution with the pH indicated.
The water temperature before the reaction was 34.5°C, and after the reaction it had risen to 52.0°C. How many moles of water were formed?
A 1-L flask is filled with 1.10 g of argon at 25 C. A sample of ethane vapor is added to the same flask until the total pressure is 1.20 atm . What is the partial pressure of argon,PAr , in the flask?
If the cell potential is 0.061 V at 25?, what is the pH of the electrolyte at the hydrogen electrode
Calculate the concentration (M) of sodium ions in a solution made by diluting 50.0 mL of a 0.874 M solution of sodium sulfide to a total volume of 250.0 mL
One compound of mercury with a formula mass of 519 g mol-1 contains 77.26%Hg, 9.25%C, and 1.17%H (with the balance beingO). Calculate the empirical and molecular formulas.
In a gas mixture, the partial pressures are nitrogen 420 torr , oxygen 125 torr , and helium 245 torr. What is the total pressure (torr) exerted by the gas mixture?
A student in lab has 3.00 g of pure N2 in 0.541 g pure H2. The reaction happens following this equation: N2(g) + 3H2(g) → 2NH3(g) How many grams of NH3 would be produced?
At its boiling point of -34.0 degree Celsius, 6.33 kJ of heat is required to vaporize 22.0 g of chlorine (Cl2). What is the molar enthalpy of vaporization of chlorine.
Chlorine gas is known to have a density of 3.17 g/L at standard temperature and pressure. What would be the volume of a 4.6 gram sample of chlorine gas at standard temperature and pressure?
The theoretical yeild of Ni(NH3)6Cl2 moles must be calculated as well as the theoretical yield of Ni(NH3)6Cl2 grams. How do you find the limiting reagent to calculate the theoretical yield.
how many liters of H2 would be formed at 530 mm Hg and 15 degrees celcius if 20.5g of zinc was allowed to react?
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