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How many phases does carbon have? Carbon, like many elements or molecules has several solid phases. What are they?
The vapor pressure of benzene is 331 mmHg at 60.6EC. What is the vapor pressure at 15.0EC? The molar heat of vaporization of benzene is 31.0 kJ/mol.
How many grams of urea must be added to 88 milliliters of water in order to obtain a solution with a mole fraction of 0.012 in urea
What is the pressure exerted by a mixture of gases in a 50.0 L container at 142°C if the mixture contains 0.100 mol O2, 0.500 mol CH4, and 0.900 mol SO2?
Determine the heat of combustion of Mg as described by the reaction: Mg(s) + 1/2O2(g) → MgO(s).
.375 kg of water are in a well insulated container at 21.3 degrees celsius. After 4.184 kJ of heat is added to the water, what is the final water temperature
The freezing point depression constant, Kf, for water is 1.86?C/m. Suppose that 5.00 g of mercury(I) nitrate was dissolved in 100.0 g of water
Some solid remained in the beaker after stirring with HCl. You washed the filter paper with ketone, which caught on fire and the filter paper was scorched
A volume of 5.0 mL of solution of sodium carbonate was analyzed and found to contain 6.34x10^-4 moles of carbonate ion. Calculate the molarity of sodium carbonate in the solution.
How many moecules of N2 are needed to react with 30 molecules of H2?
Calculate the mass in grams of hydrogen chloride produced when 5.05L of molecular hydrogen measured at STP reacts with an excess of molecular chlorine gas.
Enter the net ionic equation, including phases, for the reaction of AgNO3(aq) with Ba(OH)2(aq).
Write a balanced chemical equation for the reaction of aqueous potassium phosphate with aqueous calcium bromide to produce aqueous potassium bromide and solid calcium phosphate. Then write the net ionic equation for this reaction.
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