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For each of the following determine whether the calculated molarity would be too low too high or unaffected and explain why a. you did not react all of the excess zinc before filtering the reaction mixture. b. you did not wash the filtered copper with deionized water c.you labeled your filter with ink that washed off during the sample filtration.
a Balanced reaction equation must have the same number of atoms of each element on both sides of the equation. to verify that the equation is balanced, count the otoms of each element on both sides of the reaction
Calculate the potential energy of interaction between the two electrons in the helium atom when they are separated by a distance of 1 Å. Similarly, what would be the potential energy of one of these electrons if it were alone in the presence of th..
Draw the splitting pattern of the following substructures assuming that the vicinal hydrogen atoms have different chemical shifts.
A student has sample of HNO3 of 340 ml at 25 degrees celsius and add water of 110 ml at 95 degrees celsius then determine the final temperature of the mixture
Calculate pH of the solution after addition of 0.20 mols of KOH. The Ka for HNO2 is 4.3*10^-4
what mass of barium is produced when molten BaCl2 is electrolyzed by a current of 3.30 105 A for 7.00 hours?
calculate the kg mix- ture from the mixer, kg water evaporated, and kg jam produced.
A solution containing Pt4+ is electrolyzed with a current of 5.80 A. How long will it take to plate out 79% of the platinum in 0.50 L of a 0.010 M solution of Pt4+.
Distillate (condensate) in four separate containers,~1mL in each, during the fractional distillation of 4mL of a (1:1) cyclohexane-toluene mixture, and then obtain IR spectra for each fraction
How to do I calculate the pH of original buffer given mass of NaC2H3O2*H2O (FW =136 g/mol) = 3.507 g
An unknown metal hypochlorite salt, M(ClO)2, is subjected to analysis by iodometric titration: the salt is dissolved in dilute sulfuric acid, treated with excess aqueous KI, and then titrated with Na2S2O2 in the same manner as in your experiment
Consider the combustion reaction: CH4 (g) + 2O2 (g) = CO2 (g) + 2H2O (l) Is this an exothermic reaction? If 100g of natural gas (CH4) is burned, calculate the heat exchange (balance the equation)
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