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Explain what are the concentrations ofHSO4-,SO42-, and H+ in a 0.20 M KHSO4 solution? H2SO4 is a strong acid, Ka forHSO-4 = 1.3x10-2)
Compute the pH for each of these solutions: a) 0.10 MNH3, b) 0.050 M pyridine
Define what is the original molarity of a solution of ammonia whose pH is 11.22?
A pound of coffee beans yields 50 cups of coffee (4 cups = 1 qt). How many milliliters of coffee can be obtained from 5 g of coffee beans?
A 2.5 L helium balloon is filled at a florist's shop. If the temperature inside the shop is 68°F, what volume will the helium occupy after being left in an automobile at 5°F in the parking lot for the day
Given the following data (?Hf, S°, respectively) for N2O4(l) -20. kJ/mol, 209.0 J/K mol, and N2O4(g) 10. kJ/mol, 303.7 J/K mol. At what temperature (in °C) does the vaporization of N2O4 liquid become spontaneous
If 5.70 of is added to the calorimeter, what will be the final temperature of the solution in the calorimeter. The heat of solution,delta H solution, ofCaCl2of is -82.8kj/mole.
1. How many CO2 molecules are needed to produce 1 glucose molecule (in photosynthesis)? 2. How many moles of oxygen atoms are in 1 mole of calcium phosphate?
A 0.10-mole quantity of CuSO4 is added to a liter of 1.0 M NH3 solution. What is the concentration of Cu2+ at equilibrium. [The formation constant for Cu(NH3)42+ is Kf = 5.0 x 1013.]
Combustion analysis of an unknown compound containing only carbon and hydrogen produced 1.1385 g of CO2 and 0.5805 g of H2O. What is the empirical formula of the compound
Compute the molarity of the hydroxide ions (OH- )in a solution that has been made by adding 70.3 grams of barium hydroxide (Ba(OH)2) in H2O(water) and diluting the solution to a final volume of four litres.
Suppose 312 grams of methylamine and 475 grams of oxygen are mixed together. How many grams of water should be produced?
The solubility of an ionic compound M2X3 (molar mass = 200. g) is 2.3 multiplied by 10-17 g/L. What is Ksp for the compound?
Descrbie observable differences between elemental copper and Cu2+ ion and between H2
Correlation of structure with the melting point - What structural aspect of these 18-carbon fatty acids can be correlated with the melting point?
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