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When 1.50g of Ba is added to 100g of water in a container open tothe atmosphere, the reaction shown below occurs and the temperature of the resulting solution rises from 22 degrees to 33.10 degrees.If the specific heat of the solution is 4.18J/(g*C), calculate delta H for the reaction, as written.
Ba (s)+2H2O(l) yields Ba(OH)2(aq)+H2
How many photons will be required to raise the temperature of 2.3 g of water by 2.1k ? Water is exposed to infrared radiation of wavelength 2.7×10?4 cm . Assume that all the radiation is absorbed and converted to heat.
A compound is 40.0%C, 6.70%H, and 53.3%O by mass. Assume that we have a 100.g sample of this compound. What are the subscripts in the empirical formula of this compound?
The solubility product of PbBr2 is 8.9x10^-6. Determine the molar solubility a) in pure water, b) in 0.20M KBr solution, c) in 0.20M Pb(NO3)2 solution.
State what substances (if compounds, give their formulas) exist in each region. Label each substance in each region as solid, liquid, or gas.
Cisplatin, an antitumor ingredient, has the formula Pt (NH3)2Cl2. What is the molar mass of cisplatin? Calculate the mass percent of platinum present in cisplantin.
A 4.22g sample of CuS was added to excess HCl, and the resulting H2S was collected over water. What volume of H2S was collected at 32 degrees celsius
A magnesium strip is reacted with hydrochloric acid yielding 26.8ml of hydrogen gas. hydrogen gas was collected over water at temp of 27 degres celsius and under a total pressure of 765 mmhg. calculate the mass of the magesium strip
112 mL of a glucose (C6H12O6) solution is prepared by diluting 8.2 mL of a stock solution of unknown concentration. If the dilute solution contains 0.20 moles of glucose
When butyl bromide is treated with sodium iodide in ethanol, the concentration of iodide quickly decreases but then slowly returns to its original concentration. Explain what will be the major product in this reaction.
An experiment reacts 2.50g of aniline, C6H7N, with 4.00 mL of acetic anhydride, C4H6O3 (density = 1.082 g/mL), and produces 2.92 g of acetanilide, C8H9NO. Calculate the theoretical yield and the percentage yield of acetanilide for this experiment.
Specify the volume of mineral water to add to each of the five flasks.
If the height of the mercury column in the leveling bulb is 30mm greater than that in the gas buret and the atmospheric pressure is 670 mm, what is the pressure on the gas trapped in the buret?
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