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1. Explain what would be the effect on your calculated mass percent recovery of Cu if youa. used all of your NaOH solution in Part II as well as the litmus paper never turned blue?b. Didn't completely react the Mg in the reaction mixture? Briefly explain.
2. With regard to the solutions you discarded in this experimenta. Classify the salt discarded from the centrifuge tubes in Step 11.b. Classify the compounds in the filtrate discarded in step 19.
a 1.60 g sample of a large biomolecule a nonelectrolyte was dissolved in 18.0 g of carbon tetrachloride. the boiling
There is an increase in temperature of 56 K. Calculate the heat lost or gained by the system in response to this change in the external temperature.
The first-order rate constant for the reaction of methyl chloride (CH3Cl) with water to produce methanol (CH3OH) and hydrochloric acid (HCl) is 3.32 10-10s-1 at 25°C. Calculate the rate constant at 39°C if the activation energy is 116 kJ/mol.
a certain first-order reaction is 66 percent complete in 65 seconds. Calculate the rate constant for this reaction
In the determination of the density of a cylinder of aluminum, it was necessary to measure the volume of the sample. The diameter of the cylinder was 38.2 mm and the length of the cylinder was 15.5 mm. What was the volume of the aluminum cylinder ..
Calculate the cell potential for the following reaction as written at 61 °C, given that [Cr2 ] = 0.826 M and [Ni2 ] = 0.0200 M. Cr(s) + Ni ^2+ (aq) --> Cr^2+ (aq) + Ni(s)
Acidic and basic solutions have distinct physical and chemical properties. For chemistry courses, especially those with a laboratory component, it is important that you be able to distinguish these properties
What happened to the phenolphthalein indicator during the production of gas. Explain 2. What products may have formed during the combustian of the gas. Support your answers with experimental evidence
An aqueous vinegar sample contains 5.4% acetic acid by mass and has a density of 1.006 g/mL. Calculate the amount of acetic acid in grams in 2.00 L of this vinegar. Report your answer using the correct number of signi?cant ?gures.
Explain what is the pH of the solution when 18.30 mL of 0.137 M trisodium hemimellitalate (trisodium benzene 1,2,3, tricarobxylate) is mixed with 25.00 mL of 0.274 M HNO3 to two d.p
One mole of an ideal monatomic gas initially at 300K is expanded from an initial pressure of 10 atm to a final pressure of 1 atm. Calculate change in E, q, w, and change in H and the final temp if the expansion is carried out according to each of ..
osmotic pressure is often used to determine the molar mass of largemolecules however errors can be introduced into the
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