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Why does the mass spectrum of Bromine contain three signals whose heights are almost in the ratio of 1:2:1? What are the origins of these signals? Why does the spectrum contain two other signals of roughly equal height? What are the origins of these signals?
Compute the a)molarity of the solution, b)molality of the solution, c) mole fraction of Ammonia.
A zero-order reaction has a constant rate of 1.90×10-4 . If after 40.0 seconds the concentration has dropped to 6.50×10-2 , what was the initial concentration?
The activation energy for a given reaction is 87 kJ/mol. What is the ratio of the rate constants for this reaction when the temperature is decreased from 37 °C to 15 °C
A 283-g sample of nickel at 100.0°C is placed in 100.0 mL of water (density = 1.00 g/mL) at 22.0°C. What is the final temperature of the water?
What is the pH of a solution that mixes 30mL of 0.01M CH3COOH with 30mL 0.0075M NaCH3CO2? (Assume the volumes are additive
Benzene formation is insignificant in bulk metathesis polymerization. Considering the mechanism of metathesis polyerizationm, suggest a reason for the different behavior
What is the pH of a sodium acetate solution prepared by adding 0.820 grams of sodium acetate to 100.0 ml of water at 25.0 oC? The Ka at 25.0 oC for acetic acid is 1.8 × 10-5.
What mass of AgBr would precipitate from this mixture? (Ksp of AgBr is 5.4x10^-13 & Kf of Ag(CN)2^1- is 1.0x10^21)
What is the molecular weight and structure? Also what does this compounds infrared spectrum and NMR spectrum show?
A sample of neon has a volume of 575 mL when it is at a pressure of 751 mmHg. What will be the volume when the pressure is increased to 1262 mmHg?
An unknown metal weighing 13.11 g at a temperature of 81.0*C is placed in a calorimeter containing 25.0 mL of water at a temperature of 25.0*C. The final equilibrium temperature is 30.0*C. What is the specific heat of the metal?
What mass of MgCl2 in grams must be added to 1.00 kg of water to prouce a solution that boils at 103.0 degrees celsius
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