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A stock solution is prepared by adding 24 mL of 0.4 M Na3PO4 to enough water to make 76 mL. What is the PO43- concentration of 25 mL of the stock solution
A piece of metal of mass 18 g at 117 C is placed in a calorimeter containing 48.2 g ofwater at 21C. The final temperature of the mixture is 85.4C.
You are the Science Officer on the Starship Enterprise and you come across a new planet. You find that no light with wavelength less than about 650 nm reaches the surface of the planet.
A solution is prepared by dissolving 0.16 mol of acetic acid and 0.16 mol of ammonium chloride in enough water to make 1.0 { L} of solution. Find the concentration of ammonia in the solution.
For the following please provide the # of bonding domains, # of nonbonding domains, polarity, intermolecular attractive forces, and which IMAF is the most important.
Suppose that 23.2 mL of 0.410 M sodium chloride is mixed to 23.2 mL of 0.339 M silver nitrate. Determine how many moles of silver chloride would precipitate?
A sample of nitrogen gas is contained in a piston with a freely moving cylinder. At0?C, the volume of the gas is 248 mL. To what temperature must the gas be heated to occupy a volume of 479mL.
how much heat is required to raise the temperature of 50.0 g of C6H6 at 6.00ºC to 93.0ºC
A sample of vinegar has a freezing point depression of 2.0 degrees C. What is the estimated percent by mass of acetic acid in the vinegar? Molar mass of acetic acid is 60g/mol
Consider an insulated system containing 150 g of liquid water and 150 g of ice at equilibrium under atmospheric pressure. A total of 22 g of steam at 120±C is admitted to the system.
How much HCl is leftover after the 20.0 mol of HCl reacts with the 12.5 mol of NaOH?
At a particular temperature, K 3.75 for the reaction SO2(g) + NO2(g) SO3(g) + NO(g) If all four gases had initial concentrations of 0.800 M
What are most important organelles? Is How does biochemistry describe life processes? there a simple basis for classifying organisms?
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