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A 2.85 g sample containing only MgO and CuO is placed in a 3.00 L container. The container is filled with CO2 to a pressure of 740 torr at 20 degrees C. After the reaction has gone to completion, the pressure inside the flask is 390 torr at 20 degrees C. What is the mass percent of MgO in the mixture? Assume that only the MgO reacts with CO2.
A 13.4-g sample of CaCl2 is dissolved in 109 g of water, with both substances at 25.0°C. Calculate the final temperature of the solution
At 0.500 atm and 15.0 degrees celcius a sample of gas occupies 120 L. What volume does sample gas occupy at 0.850 atm and 10.0 degrees celcius?
44.0 mL of 0.140 M and Na2SO4 and 25.0 mL of 0.160 M KCl Indicate the concentration of each ion present ?
a soulution is prepared by mixing 25.0ml of .100M HCL and 2.00mL of .200M NaCl. what is the molarity of the chloride ion solution
At a particular temperature, N2O5 decomposes according to a first-order rate law with a half-life of 3.0 s. If the initial concentration of N2O5 is 1.0 × 1016 molecules/cm3, what will be the concentration in molecules/cm3 after 11.3 s?
A proton in a linear accelerator has a de Broglie wavelength of 138 pm. what is the speed of the proton?
How much water must be added to 516 mL of 0.181 M HCl to produce a 0.128 M solution? (Assume that the volumes are additive.)
A 35.0 mL sample of gas is enclosed in a gas tight syringe at 22 degrees celsius. If the syringe is immersed in an ice bath at 0 degrees celsius, what is the new gas volume?
If this energy were used to vaporize water at 100 degrees C, how much water in liters could be vaporized? (Assume that the density of water is 1.0 g/mL.)
A compound contains 40.00% carbon, 6.67% hydrogen, and 53.33% oxygen. Determine the empirical formula of the compound. Give the chemical formula for calcium phosphate.
A 5.0 ml sample of vinegar was titrated with 7.2 ml of 0.55 M NaOH. if the density of vinegar solution is 1.00g/ml, what is the mass percent of acetic acid present.
sulfate pentahydrate are made into a solution with 512.441 g of water. What is the molality of the copper sulfate solution?
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