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How many moles of urea (60g/mol) must be dissolved in 71.6g of water to give a 2.4m solution?
To 2.00 L of .100M of lead(II) nitrate, you add .500 grams of sodium sulfide (Na2S). Being a sodium salt, sodium sulfide is soluble in water. What would you expect to see after the sodium sulfide dissolves
Which of the following has a dipole moment. A) CO2 B) BCl3 C) BrF3 D) more than one of these E) none of these
For which set of values of DH and DS will a reaction be spontaneous (product-favored) at all temperatures
Beakers 1 through 4 contain 2.3, 1.91, 5.985, and 0.52 g of dry potassium nitrate respectively. How many moles of potassium nitrate were recovered after the water evaporated
The first ionization energy of magnesium is greater than the first ionization energy of calcium. Explain. The first ionization energy of nitrogen is lower than the first ionization energy of oxygen. Explain.
What is the pH of a sulfadiazine sodium solution containing 0.5 M of the drug in 1000 mL of solution?
0.5g KCl was dissolved in 100g water and the solution originally at 200C, froze at - 0.240C. Calculate the percentage ionization of salt. Kf per 1000g of water = 1.86K
you are given 2.56 g of salicylic acid. using the procedure in the lab manual for the synthesis of aspirin you recover
How much acid of 0.5N concentration would be required to fully neutralize an 8.6g sample of sodium stearate
If 13.0g of CCl3F is enclosed in a 1.2-L container, what mass of liquid will be present, when the vapor pressure of CCl3F at 300K is 856 torr?
2kclo3>2kcl+3o2 a 3.0 mol sample of kclo3 was decomposed, how many moles of O2 are formed asumming 100% yield
a calorimeter contains 25.0 of water at 14.0. when 1.80 of a substance with a molar mass of 82.0 is added it dissolves
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