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A 102.5 g sample of metal beads was heated in a water bath to 99.5deg. Celsius. The metal was then added to a sample of water (25.7g) and the temperature of the water changed from an initial temperature of 20.0 deg. Celsius to a final temperature of 41.5deg. Celsius. A) What was the temperature of the metal at equilibrium? B) What was the temperature change of the metal? C) Calculate the specific heat and the atomic mass of the metal. What is the metal?
Consider the balanced chemical reaction shown: 4PH^3 (g) + 8O^2 (g) ---> 6H^2O (l) + 1P^4O^10 (s) In a certain experiment, 8.92g of PH^3 reacts with 9.60g of O^2(g)
For the equilibrium 2H2S(g) 2H2(g)+S2(g) Kc=9.0x10^-8 at 700 degrees C. The initial concentrations of the three gases are 0.550 M H2S, .550 M H2, and .275 M S2. Determine the equilibrium concentrations of the gases.
An oxygen tank kept at 20.0?C contains 28.0 moles of oxygen and the gauge reads 31.0 atm. After two weeks, the gauge reads 20.7 atm. How much oxygen was used during the two-week period?
Consider the titration of 50.0 mL of 0.217 M hydrazoic acid (HN3) (Ka = 2.6 x 10-5) with 0.183 M NaOH. determine the pH of the solution before any NaOH is added ?
The gas plus vapor at its equilibrium partial pressure leaves the liquid at the same temperature and pressure. If 6.550 g of acetone has evaporated, what is the vapor pressure of acetone at 25 degrees Celsius?
write mechanisms for the following reactions, which are used in chemical tests and derivative preparations: (a) the reaction of butanal with 2,4 dinitrophenylhydrazine reagent.
What is the amount of energy packaged in a photon with a wavelength of 310 nm. Calculate the frequency of EM radiation with a wavelength of 1.2 x 10-7 m
The mass spectrum of an organic compound shows the relative abundances of M to be 36.44% and M 1 to be 8.277%. Assuming the peaks are caused by 12C and 13C isotopes
An alloy, initially weighing 50 grams, contains 90 atomic% silver and 10 atomic% copper. How many grams of copper would have to be added to make the alloy 12 atomic% copper?
Calculate the pressure (in atm) exerted by 1.00 mole of acetylene at 125°C in a 20.0-liter container. The van der Waals constants for acetylene are: a = 20.0 L2 • atm/mol2, b = 0.100 L/mol.
Calculate the freezing point and boiling point of a solution of 383 g of glucose dissolved in 400 g of water
What is the freezing point of a solution of 1.17 g of 1-naphthol, C10H8O, dissolved in 2.00 mL of benzene at 20°C? The density of benzene at 20°C is 0.876 g/mL. Kf for benzene is 5.12°C/m, and benzene's normal freezing point is 5.53°C.
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