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Question:
A 0.879g of a sample a CaCl2*H20/K2C2O2 solid salt mixture is dissolved in 150mL of deionized water. A precipitate forms which is then filtered and dried. The mass of this precipitate is 0.284g. The limiting reagent in the salt mixture was later determined to be CaCl2*2H20
(a) write the molecular form of the equation for the reaction.
(b) Write the net ionic equation for the reaction.
(c) How many moles and grams of CaCl2.2H2O reacted in the reaction mixture?
(d) How many moles and grams of excess reactant, K2C2O4.H2O, reacted in the mixture?
(e) How many grams of the K2C2O4.H2O in the salt mixture remain unreacted (in excess)?
(f) What is the precent by mass of each salt in the mixture?
The meniscus of mercury in a glass capillary tube is convex because of A)the very high density of mercury as compared with water. B)the low surface tension of mercury
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Draw and name all of the structural isomers that are ketones with five carbon atoms in its longest chain and the molecular formula C5H10O. Can this molecular formula also have an aldehyde structure? If so, illustrate and name the aldehyde. Can thi..
Electrolytic cell in which Mn^2+ is reduced to Mn and Sn is oxidized to Sn^2+. (Assume standard conditions). Write an equation for the half-reaction occurring at each electrode.
An avergae 70-kg adult human contains 170g of potassium. 0.0118% of naturally occuring potassium is potassium-40, which is a beta emitter with a half life of 1.28x109 years. What is the total activity (in counts per minute) of a human being, due s..
What is the final concentration of a solution made from 7.8 mL of 0.92 M CuSO4 and 14.5 mL of water?
a stock solution is prepared by adding 21 ml of 1 m alcl3 to enough water to make 76 ml. what is the cl- concentration
The pH of a 0.55 M aqueous solution of hypobromous acid, HBrO, at 25.0 °C is 4.48. What is the value of Ka for HBrO.
Draw a lewis dot structure for ketoisophorone to figure out how many non bonding pairs of electrons there are in the molecule.
Question- It takes 52.0J to raise the temperature of an 8.60g piece of unknown metal from 13.0 C to 24.0 C. What is the specific heat for the metal
Question- What volume of 0.200 M Na2Co3 (aq) solution contains 53.0 g of Na2Co3 Could you show the steps and equation
Compare and contrast the endo vs exo-nuclease excision repair mechanisms of DNA polymerase.
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