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Two samples of calcium fluoride are decomposed into their constituent elements. The first sample produced g of calcium and g of fluorine. If the second sample produced 294mg of fluorine, how many g of calcium were formed?
Because of increasing evidence of damage to the ozone layer, chlorofluorocarbon (CFC) production was banned in 1996. However, there are about 100 million auto air conditioners that still use CFC-12 (CF2Cl2). These air conditioners are recharged fr..
calculate the apparent degree of dissociation of the nh4cl if the freezing point of this solution is -15.3oc?molal
A zero-order reaction has a constant rate of 1.60×10-4 . If after 35.0 seconds the concentration has dropped to 2.50×10-2 , what was the initial concentration?
One of the emission spectral lines for Be3+ has a wavelength of 253.4 nm for an electronic transmission that begins in the state with n = 5.
octane has a density of 0.692g/ml at 20C. How many grams of O2 are required to burn 30.5 gal of C8H18
identify the absorptions associated witht he carbonyl group and with the aromatic rings
He intends to have the pH set to 10.0 . He uses acetic acid /acetate as the buffer system. Is the oH buffered in the desired range. How would you improve on Joe experiment design
Calculate the pH of a solution formed by mixing 65 mL of 0.30 M NaHCO3 with 75 mL of 0.30 M Na2CO3
suppose a 5 liter sample of oxygen gas at a given temperature and pressure contains 1.08x1023 molecules. how many
Consider a saturated solution of calcium fluoride in 0.039 M potassium nitrate. Complete the following tasks, and then answer the question. Write the chemical equation corresponding to Ksp.
Determine the synthesis of 3-hexanol starting from acetylene. Use your book and choose the reagents. It will take several steps and many reagents to get to the product.
an ice cube of mass 8.5 is added to a cup of coffee whose temperature is 95 and which contains 130 of liquid. assume
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