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How do the following influence the percent yield? Will the percent yield be too large, too small, or no effect?
a.) You add NaOH into Cu(NO3)2 to create a precipitate. What will happen if too much of NaOH was added when Cu(NO3)2 was precipitated?
b.) You added too much CH3COOH to CuO (solution mixture)?
c.) The filterate is blue in color by the product of dissolving CuO. The filter was slightly blue after the CuO was filtered on to filter paper?
d.) Not enough magnesium was added to remove all the blue color in the solution?
e.) The filter paper was still damp when you wieghed the paper and residue?
A set of data gave an average unpopped kernel of 0.12 grams. How many kernels are in a pound of unpopped corn?
A solution is prepared by dissolving 12.4 g ammonium sulfate in enough water to make 100.0 mL of stock solution. A 12.50 mL sample of this stock solution is added to 55.00 mL of water. Calculate the concentration of ammonium ions and sulfate ions ..
What mass of water can be heated from 22?C to 100 ? C by burning this piece of coal? Answer in units of g
A 0.140-mole quantity of M(NO3)2 is added to a liter of 1.030 M NaCN solution. What is the concentration of M2 ions at equilibrium?
A balloon is partly inflated with 480 liters of helium at sea level where the atmospheric pressure is 996 mbar.The balloon ascends to a altitude of 3000 meters.
If the reaction 2H2S(g) 2H2(g) + S2(g) is carried out at 1065C, Kp = 0.0120. What is the value of Kc for the reaction H2(g)+1/2S2(g) H2S(g) at 1065C ?
A certain reaction has an activation energy of 27.03 kJ/mol. At what Kelvin temperature will the reaction proceed 3.00 times faster
Mass of nitrogen, Suppose 5.0 liters of Nitrogen (diatomic) is at a temperature of 40 degrees C and a pressure of 1.5 ATM
How many kilojoules are released when 10.0g of steam condenses at 100 degrees C and cools to 0 degrees C?
a sample of methane of mass 4.5 g (4.5g(1mol/16.04g)=.2804mol) occupies 12.7 L at 310K. a) Calculate work done when the gas expands isothermally (delta T=0) against a constant external.
The activation energy for the following reaction is 60. kJ/mol. Sn2+ + 2Co3+ → Sn4+ + 2Co2+ By what factor (how many times) will the rate constant increase.
How many grams of are CaH2 needed to generate 147L of H2 gas if the pressure of H2 is 827 torr at 20 C?
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