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A mixture of Mg and Zn having a mass of 1.000g was burned in oxygen. It gave a mixture of MgO and ZnO that had a mass of 1.409g. What mass of An was there in the original mixture?
A 270- flask contains pure helium at a pressure of 755 . A second flask with a volume of 485 contains pure argon at a pressure of 727 torr.
At the point of equilibrium there were 82.63 g of Br2(l). Determine the total pressure in the 50.0 L container at equilibrium.
What mass of rm KCl is needed to precipitate the silver ions from 15.0 mL of 0.190 M rm AgNO_3 solution?
How many moles of naphthalene are required to react stoichiometrically with 1.24 moles of 2-bromo-2-methylpropane to produce 1.24 moles
What volume of a 0.33 M Mg(NO_3)_2 solution contains 97 g of Mg(NO_3)_2?
Calculate the mass of material required if 1500 calories of energy causes a change from -27 degrees fahrenheit to 91 degrees celcius and the specific heat capacity is 0.25 joules/gram-degree C.
Write the balanced net ionic equations for the reactions that occur in each of the given cases as. Cr2(SO4)3(aq) + 3(NH4)2CO3 (aq) = Cr2(CO3)3 ( s) + 3(NH4)2SO4 ( aq).
Which of the seven Anions will be the hardest to detect (same anions as above), Why do you think this? If two or more are possible explain why.
What is the osmolarity of the 5.0% m/v calcium chloride solution? If you put a red blood cell into this 5.0% m/v calcium chloride solution, explain what would happen to the cell during the process of osmosis and why?
How many grams of O2 will be required to completely react with 2.43 grams of Mg metal ribbon to produce MgO.
what would its speed be just before striking the ground? Ignore the effects of air resistance
They will dilute the 0.5 M solution to obtain 100 mL of 0.15M solution and dilute the 0.5m solution to obtain 10,000 ppm per mass. What is the molarity, molality, mass fraction and mole fraction
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