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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?
The rate is measured at 300 K. To what temperature must the reaction be raised to double the rate? a) 310k b)333k c)353k d)363k e)373k f)412k
nitrate solution according to the unbalanced equation given below. Hg(NO3)2(aq) + NaI(aq) = HgI2(s) + NaNO3(aq) (a) What volume of Hg(NO3)2 is required for complete precipitation?
Calculate the mean molecular weight (kg/kmol) of the fuel c) Evaluate the air-fuel ratio on a mass basis.
What volume of a 0.170 M NH4I solution is required to react with 963 mL of a 0.440 M Pb(NO3)2 solution? How many moles of PbI2 are formed from this reaction?
A pound of coffee beans yields 70 cups of coffee (4 cups = 1 qt). How many milliliters of coffee can be obtained from 1.0 g of coffee beans.
A sample of 57 grams of H 2 O with a temperature of sixteen degree celsius is combined to 260 grams of H2O at 90 degree celsius in an insulated container. Determine the final temperature after thermal equilibrium is reached?
How many grams of formic acid, HCOOH, must be added to 0.300 L of 0.190 M sodium formate, HCOONa, to yield a buffer solution with a pH of 4.00? Assume no volume change. Ka of HCOOH = 5.0 10-4.
Find the temperature at which ethanol boils on a day in the mountains when the barometric pressure is 547 mmHg. (Given: The heat of vaporization of ethanol is 39.3 kJ/mol; the normal boiling point of ethanol is 78.3°C.)
calculate the Henry's law constant for oxgen solubility in freshwater undr these conditions
A system absorbs 192 kj of heat and the surroundings do 110 kj of work on the system. what is the change in internal energy of the system.
The analysis of this compound shows that it contains 41.8 percent C, 4.7 percent H, 37.3 percent O, and 16.3 percent N. Calculate the molecular formula of the compound.
Apply Hess's Law to the 3 reactions above in order to determine the enthalpy of combustion of glucose 1. glucose + 6 ADP + 6Pi = 2 pyruvate
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