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Antimony has two stable isotopes, 121^Sb and 123^Sb. The 121^Sb isotope has a natural abundance of 57.21% and an atomic mass of 120.90382 amu. Calculate the percent abundance and atomic mass of the 123^Sb isoyope.
A solution of KOH in ethanol is made up by dissolving 0.335 g KOH in ethanol to form 250.0 mL of solution. Similarly, 1.455 g of C2H5I is dissolved in ethanol to form 250.0 mL of solution.
We add excess Na2CrO4 solution to 17.0 mL of a solution of silver nitrate (AgNO3) to form insoluble solid Ag2CrO4. When it has been dried and weighed, the mass of Ag2CrO4 is found to be 0.310 grams.
Isopropyl alcohol (I.P.A.) has a flash point of 53 degrees Fahrenheit. The outside temperature is 68 degrees Fahrenheit. While this product is being unloaded from a truck
Determine the molarity of acetic acid in a 15 ml sample of vinegar that requires 22.7 ml of a .550 M solution of NaOH
Which will experience the greater effective nuclear charge, the electrons in the n=3 shell in Ar or the n=3 shell in Kr? Which will be closer to the nucleus?
What would the molar concentration of the tree sap have to be to achieve this pressure on a day when the temperature is 28?
Calculate the change in temperature for 4.5g of CaCl2 dissolved in 90.0mL of H20. Assume that calorimeter absorbs no heat. (Ccal=0)
A balloon is filled to a volume of 7.00 x 102 mL at a temperature of 20.0 oC. The balloon is then cooled at constant pressure to a temperature of 1.00 x 102 K.
0.10 mol of argon gas is admitted to an evacuated 50cm^3 container at 20C. The gas then undergoes an isobaric heating to a temperature of 300C.
A 29.20 g piece of iron and a 25.30 g piece of gold at 100.0 degree C were dropped into 980.0 mL of water at 15.65 degree C. The molar heat capcities of iron and gold are 25.19 J/(mol degree C) and 25.41 J/(mol degree C), respectively.
a constant push of 250N is necessary to slide a crate weighing 400N along a 2.0-meter-long ramp. if the ramp rises 1.0m, what is the efficiency of the ramp.
A piece of metal of mass 27 g at 99?C is placed in a calorimeter containing 45.1 g of water at 21?C. The final temperature of the mixture is 38.7?C.
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