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8.5 mL of a sample of sea water solution was added to a 44.317 g evaporating dish. The combination weighed 52.987 g. After eaporation the dish and contents weighed 44.599 g.
a.) What was the mass percent of dissolved solids in the sea water?
b.) The actual solution chloride content in the sea water was 2.69%. If it had been assumed that the dissolved solid(s) consisted only of sodium chloride, what percentage error would have resulted? [Caution: the answer is not 0.56%]? The numbers included here are for a typical sea water sample. In addition to NaCl, typical sea water contains about 0.56% by mass of compounds (primarily chlorides) of magnesium, calcium and potassium.
Calculate the average atomic made of boron which has 2 isotopes. Boron-10 has an abundance of 19.9% and boron-11 has an abundance of 80.1%.
When 27 mL of a 405 mL stock solution containing 2.3 M AlCl3 is diluted to 81 mL, what is the concentration of Al3+ in the new solution?
An automobile has a wavelength that is not measurable by human standards. If the car has a mass of 4000 lbs (1.81 x 103 kg) and travels at 60 miles/hr (26.8 m/s), calculate the wavelength of the car.
diamond crystallizes in a cubis cell with a+0.35670 nm and Z=8. Using 3.51 g/cm cubed as the density of diamond calculate te value of avagadro's number.
A sample of sodium reacts completely with 0.426 of chlorine, forming 702 of sodium chloride. What mass of sodium reacted?
An unknown is believed to be an alcohol because the IR spectrum showed broad absorption at 3200-3500 cm-1 and no absorption in the 1700-1750 cm-1 region.
Write down the full Hamiltonian for a He atom moving freely in space, i.e., there is no external potential. b) Now assume there is no repulsion between the electrons
Two compounds of nitrogen tetroxide(N2O4) and hydrazine(N2H4) are used as rocket fuels.When the two are mixed,they ignite and produce nitrogen gas and water.
Calculate the potential volume of the gas contained in 500-mL aerosol can when it is heated from 25 degrees C to 54 degrees C (approx. 130 degrees F) assuming a constant pressure.
A similar question was asked before, but the formatting of the answer made it unreadable. So, I am asking it again. I have a thermodynamic system with three states in the canonical ensemble
A fixed quantity of gas at 21^circ C exhibits a pressure of 725 torr and occupies a volume of 4.32 L.
Estimate the pH, and the concentrations of all species in a 0.300 M phosphoric acid solution. pKa1: 2.16 pKa2: 7.21 pKa3: 12.32 Hint: Convert the pKa values to Ka values
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