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A test tube contains a mixture of water and soluble and insoluable ionic compounds. the insoluble ionic compound is more dense than the liquida. Describe the mixture before it is centrifuged. Be specific using scientific words that aplly such as homogeneous or heterogeneous
the density of the solution is 1.41 g/mL at 25 degrees celcius. What is the molarity of nitric acid in this solution?
Methane gas (CH4) comprises 7 x 10-5 % by mass of the Earth's atmosphere. What is the residence time of the gas in the atmosphere if it is being lost to the methane sinks at the rate of 4 x 1011 kg yr-1.
The glass electrode used in commercial pH meters gives an electrical response proportional to the concentration of hydrogen ion. To convert these responses to a pH reading
calcium and the human body normally contains 6 quarts of blood, what mass of calcium (in grams) will be found in the total blood volume?
If all four gases had initial concentrations of 0.650 M, calculate the equilibrium concentrations of the gases.
An aluminum atom has a diameter of 143 pm. How many aluminum atoms can be placed on a line 1.00 mm long
A gas occupies a volume of 449 mL at 12.9°C and 737 mm Hg pressure. Calculate the volume the gas would occupy at STP.
We often hear the terms organic, natural, and chemical in the media. Organic and natural are usually used to imply that a product is "healthy" and/or "environmentally friendly" while chemical often implies negative implications for health and for ..
what is the solubilty of O2 at an elevation of 12, 000 ft where the atmospheric pressure is 0.657 atm? Assume the temperature is 25 degrees celsius, and that the mole fraction of O2 in air is 0.209 at both 12, 000 ft and at sea level.
How many grams of formic acid, HCOOH, must be added to 0.160 L of 0.150 M sodium formate, HCOONa, to yield a buffer solution with a pH of 4.30? Assume no volume change. Ka of HCOOH = 5.0 10-4.
Elemental analysis of putrescine (The rotten smell of a decaying animal carcass is partially due to a nitrogen-contained compounded) showed
placed in 1.00*10^3 g of water at 25C. final temp of this mixture was 26.3C. What is specific heat of metal?
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