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Question
Which of the ionic compounds in this experiment would be good for making purple fireworks ?
Barium Chloride
Potassium Chloride
Potassium Nitrate
Barium Nitrate
Sodium Chloride
Potassium Sulfate
Mercury (a.k.a. quicksilver) is a metallic element and a liquid at room temperature. Calculate mercury's density if a sample of mercury is found to have a mass of 441.0 g and a volume of 33.08 mL.
Tritium (symbol T) is produced in the upper atmosphere by neutron cosmic rays primarily through the 14N(n,T)12C and 16O(n,T)14N reactions.
A 28.0-g sample of nitrogen gas combines completely with 6.0 of hydrogen gas to form ammonia. What is the mass of ammonia formed.
Plutonium-241 has a half-life of 14.4 years and decays to Am-241. Em-241 has a half life of 432.7 years and decays to NP-237. If you bury 100 curies of Pu-241 today, how much Pu-241 and Am-241 will be present in 100 years
Calculate the concentration of OH- ion remaining in solution. Calculate the concentration of Sr+ ion remaining in solution. Calculate the concentration of NO3- ion remaining in solution.
A solution containing 3.50 of sodium carbonate is mixed with one containing 5.00 of silver nitrate. How many grams of sodium carbonate are present after reaction?
At a given temperature, 2.74 atm of F2 and 2.08 atm of Br2 are mixed and allowed to come to equilibrium. The equilibrium pressure of BrF is found to be 1.003 atm. Calculate Kp for the reaction at this temperature. F2(g) + Br2(g) 2 BrF(g)
Question- Calculate the wavelength of a photon of light emitted from a hydrogen atom when an electron falls from n = 3 to n = 1.
The freezing point of benzene is 5.5oC. What is the freezing point depression of a solution of 5.00 g naphthalene (C10H8) in 444 g benzene (Kf of benzene = 4.90oC/m)?
The incomplete pressures of CH4, N2, and O2 in a sample of gas were found to be 100, 450, and 200 mmHg, respectively. Compute the mole fraction of Nitrogen.
Pure solid NaH2PO4 is dissolved in distilled water, making 100.0ml of solution. 10 ml of this solution is diluted to 100.00 ml to prepare the orignal phosphare standard solution
How much energy in kJ is captured by a solar oven if the mass of the can is 13.853 g, the mass of the can and water is 50.165 g, and the temperature in degree C
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