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The density of air at ordinary atmospheric pressure and 25 degrees C is 1.19 g/L. What is the mass in kilograms of the air in a room that measures 8.2 m x 13.5 m x 2.75 m?
The concentration of the alkane C20H42 (FM 282.55) in a particular sample of rainwater is 0.2 ppb. Assume that the density of rainwater is close to 1.00 g/mL
What is the minimum uncertainty in the position of an electron, given that we know nothing about its speed except that it is less than the speed of light
If 141 mL of wet H2 is collected over water at 24°C and a ba?rometric pressure of 738 torr, how many grams of Zn have been consumed.
Calculate the net charge of Aspartic Acid. Its given that Aspartic acid has a pK1 COOH at 1.99 and also a pK2 NH3 group at 9.90
At 580 nm the wavelength of its maximum absorption, the complex FeSCN2+ has a molar absorptivity of 7X10^3 L cm-1 mol-1 calculate
Calculate the concentration of I - in a solution obtained by shaking 0.20M KI with an excess of AgCl(s)
Although the formula of this new chemical is a trade secret, it can be revealed that the formula for Herbigon is X-acetate (XCH3COO, where "X" represents the top-secret cation of the salt).
The unknown has peaks at 2818.38, 2716.12, 1682.14, 1622.34, 1491.16,1450.65, 1359.99, 1304.05, 1188.30,1014.69, 925.95,883.51, 758.19, 698.39.
Calculate the theoretical yield when 7.0 ml of acetic anhydride
1 calculate the final temperature of 63 ml of ethanol initially at 11 degc upon absorption of 527 j of heat. density of
A 3.664 g sample of a monoprotic acid was dissolved in water. It took 20.27 mL of a 0.1578 M sodium hydroxide solution to neutralize the acid. Calculate the molar mass of the acid.
30.0 mL of 0.100-M formic acid (Ka = 1.80×10-4) is titrated with 0.100-M NaOH. What is the initial pH of the formic acid solution? What is the pH of the solution after 12.0 mL NaOH has been added?
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