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A piece of metal weighting 20.32 grams is added to a flask with a volume of 24.5 mL. It is found that 18.52 grams of water (d=0.9970 g/ml) must be added to fill the flask. What is the density of the metal?
Calculate the molar concentration of OH - ions in an 01.33 M solution of hypobromite ion, BrO- (Kb = 4.0 10-6).
A 35.0-mL sample of 0.20 M LiOH is titrated with 0.25 M HCl. What is the pH of the solution after 23.0 mL of HCl have been added to the base?
one cup is equivalent to 237 cm^3. In 1 cup of oil has a mass of 216 g. What is the density of olive oil in g/cm^3
Compute the number of rads and rems of radiation in five years from such a level of plutonium.
If you measure the pH and find it to be 11.24, how many grams of triethylmine were used to make the solution?
Calculate the volume of C2H2 that is collected over water at 23 Celcius by reaction of 0.751 g of CaC2 if the total pressure of the gas is 740 torr. (The vapor pressure of water is 21.07 torr .)
What will be the velocity of the escaping electrons under these conditions? What is the de Broglie wavelength of the escaping electrons?
A scuba diver with a lung capacity of 5.2 L inhales a lungful of air at a depth of 45 m and a pressure of 5.5 atm. If the diver were to ascend to the surface (where the pressure is 1.0 atm) while holding her breath.
which hydroxide precipitates first as NaOh is slowly added to the solution? b) what is the molar concentration of the first cation precipitated when the other cation just starts to precipitate out of solution?
A 515 g piece of copper tubing is heated to 95.0°C and placed in an insulated vessel containing 57.0 g of water at 30.0°C.
what is the mass in grams of 3.17x10^20 atoms of the element?
how many kilojoules and kilocalories of heat are required to raise 40.0 g of water from -12 degrees Celsius to 130 degrees Celsius?
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