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When NH4NO3 dissolves in H2O, would you predict that the energy needed to break the ionic bonds and separate the water molecules (H1 and H2) to be greater or less in absolute value than the energy released (H3) when the water-ion interactions occur? Explain why you think this?
A compound in spectrum shows a broad absorption at 3300 cm-1 and a sharp absorption at 1710 cm-1 what functional group does it contain
When 2.20 grams of Cr(CO)6 reacts according to the following equation at 400 °K in a closed system the temperature goes down and 5.2 kJ of hear is absorbed
What is the molar mass of lysine if 750.0 mL of a solution containing 8.60 g of lysine has an osmotic pressure of 1.918 atm? T = 25.0°C
What is the molality of a solution that contains 2.93 grams of urea (molar mass = 60.0 g/mol) in 141 grams of benzene.
Explain what a high Ka value of an acid represents and what a low Ka value represents. State and explain the difference between the endpoint and the equivalence point in a titration
Calculate the mass of a 1m3 parcel of dry air at STP. Calculate its mass at the same pressure but at 10 ?C and 20 ?C.
A solution contains one or more of the following ions: Pb 2+, Ca 2+, and Zn 2+. When sodium chloride is added to the solution, a precipitate forms
Determine the empirical formula for a substance with the following composition
what masses of NaCl and water are needed to prepare 1000g of a solution that is 0.90% by mass
a sample of nitrogen gas kept in a container of vulume 2.43 L and temp 27degree C exerts a pressure of 4.83 atm. calculate the number of moles of gas present
The question in the lab is asking what percentage by mass is the calcium, chloride and water in the orginal solution for each trial. In this lab we performed two trials, in each, we added 50 mL water to 2.0 g of CaCl2.
List these compounds in order of increasing molar solubility in water show your calculations.
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