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307g of an unknown mineral is heated to 98.7 C and placed into a calorimeter that contains 72.4 g of water at 23.6C. the heat capacity of the empty calorimeter was 15.7 J/K. the final temperature of the calorimeter is 32.4C. What is the specific heat of the mineral in J/gK?
If 290. mL of 0.130 M KOH are mixed with 200. mL of 0.430 M KOH, what is the molarity of the final solution?
We have learned that valence bond theory helps us to predict s and p bonding in molecules. All of the following statements about molecular bonding are true, but which statement best summarizes the most basic premise for bonding in a molecule?
Suppose that the microwave radiation has a wavelength of 12.4cm . How many photons are required to heat 295mL of coffee from 25.0 C to 62.0 C ? Assume that the coffee has the same density, 0.997 g/mL , and specific heat capacity, 4.184 J(gxK) , as..
Consider 20.0 moles of CO2 in a 1.0 liter container at 300.0 K. What is the pressure predicted by the van der Waals equation.
How many grams of are CaH2 needed to generate 147L of H2 gas if the pressure of H2 is 827 torr at 20 C?
Calculate the molar mass of an unknown solid (assume a non nonelectrolyte) if 1.35 grams of the solid was dissolved in 15.0 grams of dodecanol and caused a freezing point depression of 2.34 degrees Celsius.
what is the partial pressure of argon? If the two flasksare connected through a stopcock and the stopcock is opened, whatis the total pressure?
How many grams of Na3PO4 will be needed to produce 550 ml of a solution that has a concentration of Na+ ions of 1.00M ?
You prepare a buffer solution by dissolving 1.77 g each of benzoic acid, HC7H5O2, and sodium benzoate, NaC7H5O2, in 900.0 mL of water.The pH of the buffer is 4.19. How much (in grams) of the buffer (benzoic acid), would you add to the 900.0 mL of ..
Acetylene gas (C2H2) is produced as a result of the reaction CaC2(s)+2H2O(l)-> C2H2(g)+Ca(HO)2(aq) if 13g of CaC2 are consumed in this reaction, how much H2O is needed?
A 1.00-mol sample of an ideal monatomic gas is compressed isothermally and irreversibly in one step from 2.50 atm to 6.50 atm at 300.0 K. Calculate G for this process
The J=0 to J=1 transition for carbon monoxide (12C16O) occurs at 1.153 X 10^5 MHz. Calculate the bond length of carbon monoxide.
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