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A clear, colorless unknown solution was divided into four separate test tubes. Nothing was observed when KOH was added to the first test tube. Nothing was observed when AgNO3(aq) was added to the third. A white precipitate formed when BaCl2(aq) was added to the fourth test tube. Which of the possible unknowns for this experiment would give this behavior? Write a balanced equation for the reaction observed between this compound and BaCl2.
The burning acetic acid from the previous question is used to heat 1.4 L of water at 22.7°C. Assume all the heat produced in the last question is absorbed by the water => 240kJ. What would be the final temperature of the water?
A stellar object is emitting radiation at 3.75 mm. If the detector is capturing 3.3*10^8 protons per second at this wavelength, what is the total energy of the photons detected in one hour
calculate the micrograms (to the nearest microgram) of iodine per serving in the finished product. Show your work.
30.0 mL of 0.10 M Ca(NO3)2 and 15.0 mL of 0.20 M Na3PO4 solutions are mixed. After the reaction is complete, which of these ions has the lowest concentration in the final solution. (A) Na+ (B) NO3- (C) Ca2+ (D) PO43- answer is C. WHY.
When 5.00 × 1022 molecules of ammonia react with 4.00 × 1022 molecules of oxygen, how many grams of nitrogen gas are produced? 4NH3(g) + 3O2(g) → 2N2(g) + 6H2O(g)
The concentration of styrene is lower in the toluene solution than in pure styrene so all bimolecular polymerization steps occur more slowly. d) the order of the reaction increases in toluene
what would the coefficent of Al(NO3)3 be in the balanced equation?
A buffer solution is made by dissolving 2.5g benzoic acid and 2.7 sodium benzoate in 100mL water. 15 mL of 0.125M NaOH is added to the solution
Explain why ice and concetrated HCl is used in Friedel Crafts Acylation. ( weigh 50 g of ice in 500 ml beaker. Add 25 ml of concentrated hydrochloric acid to the beaker.
You have a sample of bone collected from Nevada and you find that it contains strontium-90 and exhibits an activity of 2.5 Bq. How much strontium-90 was present in the bone when the animal died 45 years ago?(The half-life of 90Sr is 29 years.)
A box contains 126000 red marbles and 885000 yellow marbles. What sample size is required to reduce the sampling standard deviation of red marbles to 1.85%
a sample of gas molecules has a temperature t1 and a root mean square velocity vrms1. a second sample of the same gas
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