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The molar heat of solution of a substance is found to be +35.34 kJ/mol. The addition of 0.20 moles of this substance to 1.5 L water initially at 55 degrees Celsius results in a temperature DECREASE. Assume the specific heat of the resulting solution to be equal to that of pure water. Find the final temperature of the solution.
What is the energy, in J/photon, of electromagnetic radiation that has a frequency of 2.89 x 1015Hz ? Express your answer to 3 significant figures in scientific notation and do not include units.(4.45 x 10-3 can be represented in scientific notati..
Draw the Lewis Structure for a Nitrate Ion (NO3-1). Assign the formal charge for the central atom, Nitrogen. What is that formal charge
Calculate the pH of a buffer solution containing 0.65 M CH3COONa. Calculate the pH after 0.0010 mol HCl is added to 450.0mL of buffer.
The solubility of manganese(II) carbonate is 5.4 × 10-4 g/L. What is the solubility product constant for manganese(II) carbonate
Calculate the velocity of a nucleus given that it has 4 neutrons, 4 protons, a wavelength
what volume of 0.131 m bacl2 is required to react completely with 42.0 ml of 0.453 m na2so4? the net ionic equation for
explain how to identify a molecular compound based on a: chemical formula and on a systematic name
1.464 g of an unknown hydrocarbon (112.6 g/mol) burns in bomb calorimeter in excess oxygen. The heat capacity of the calorimeter,Cv, = 5.234 kJ/ºC and ?T =5.744 ºC. Find ?E for this hydrocarbon in kJ/mol.
If 157 of wet is collected over water at 24 and a barometric pressure of 739 , how many grams of have been consumed? (The vapor pressure of water is 22.38 .)
Write the correct equilibrium constant expression for each reaction and indicate its numerical value
How many grams of hydrogen would have to react to produce 71.9 kJ of energy from the reaction 2H2 + O2 --------> 2H2O + 484kJ?
Student prepared .10M solution of formic acid and found it's pH at 25 Celsius to be 2.38. What is the pKa of formic acid at this temperature?
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