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what is the freezing point(Degrees C) of a solution prepared by dissolving 11.3g of Ca(NO3)2 ( formula weight= 164g/mol) in 115g of water? the molal freezing point depression constant for water is 1.86 degrees C/m.
N2(g) + 3H2 (g) ---- 2NH3(g) a one liter vessel contain 1.60 mole NH3.800 mole N2 and 1.20 mole of H2. What is the equilibrium constant.
A balloon filled with helium gas at 20C occupies 2.91 L at 1.00 atm. The balloon is immersed in liquid nitrogen at -196C, raising the pressure to 5.20 atm.
What volume of O2 gas (in L), measured at 782 mmHg and 25C is required to completely react with 53.2 g Al
An alloy, initially weighing 50 grams, contains 90 atomic% silver and 10 atomic% copper. How many grams of copper would have to be added to make the alloy 12 atomic% copper?
Glucose Isomers, When glucose is placed in water two stereoisomers are formed, one with the new OH on the opposite side of the ring than the 6th carbon
Explain solution of an unknown acid HX, determine that the pH of the solution is 4.00. What is the [H3O+] in the solution?
Suppose 5.0 mol of antimony (III)fluoride is added to 10.0 mol of carbon tetrachloride. How many grams CCl2F2 and SbCl3 are there if the reaction is 100% complete?
The decomposition of nitrogen dioxide is a second-order reaction. At 550 K, a 0.250 M sample decomposes at the rate of 1.17 mol/Lxmin a). Write the rate expression?
What volume and mass of steam at 100.°C and 1.00 atm would, during condensation, release the same amount of heat as 100. cm3 of liquid water during freezing.
a hydrate of calcuim chloride contains 49.3% water and has a formula weight of 219g/mol calculate the molecular formula of the hydrate
Calculate rate constant for 1. level reaction where 81% of the matters have already react after 27 seconds.
Calculate the mass of nitrogen dissolved at room temperature in an 99.0 mL home aquarium. Assume a total pressure of 1.0 atm and a mole fraction for nitrogen of 0.78.
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