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Question- 1. List three ways in which wells in the spot plate could become contaminated, leading to inaccurate results, and discuss how to prevent each.
2. List four types of observations that would lead you to believe that a chemical reaction has occurred.
3. For unknowns containing the following mixtures of anions, indicate which anions could be definitely identified and which test(s) would identify each. Indicate if an anion could not be distinguished by the tests used in this experiment.
a. Cl-, I-, OH-
b. SO42-, C2O42-, SCN-
Explain each and every step in detail. I need proficient help in the above problems.
sample containing 4.80 g O2 of gas has a volume of 15.0 L. Pressure and temperature remain constant. What is the new voume if 0.500 mole O2 gas is added?
Fifty percent of that sunlight is captured by the collector and heats the water flowing through it. What would be the temperature rise of the water as it leaves the collector?
1 if 50 kj of heat are given off by a chemical reaction in aqueous solution and all the heat is absorbed by the
Problem- Dimethylamine, (CH3)2NH, a key intermediate in detergent manufacture, has a Kb of 5.9 x 10^-4. What is the pH of 1.5M (CH3)2NH2
Ammonium Carbonate, NH4CO2, decomposes as follows: NH4CO2NH2(s) -> 2NH3(g) + CO2(g) Starting with only the solid, it is found that at 40C the total gas pressure is .363 atm. Calculate Kp.
A small collection of dimes and quarters are submerged in 10.00 mL of water in a graduated cylinder causing the water level to rise to the 18.87 mL mark. What is the combined monetary value (in Can$) of those coins?
Mechanism for bromobenzene + magnesium turnings + annhydrous diethyl ether + benzaldehyde + H2SO4
Nuclides below the valley of stability can become more stable through which of the following processes
Question- A 35.161 mg sample of a chemical known to contain only carbon, hydrogen, sulfur, and oxygen is put into a combustion analysis apparatus, yielding 62.637 mg of carbon dioxide and 25.641 mg of water.
Explain Radio waves travel at the speed of light, 3.00x10^8 m/s. if you were to transmit a question to an astronaut on the moon, which is 239,000 miles from earth, Define the minimum time that you would have to wait to receive a reply
write equations that show a plausible reaction mechanism for the acid-catalyzed isomerization of maleic acid
magnesium burns in air to produce magnesium oxide mgo and magnesium nitride mg3n2. magnesium nitride reacts with water
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