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The concentration of fluoride, lead, nitrate and iron in a water sample from an underground lake was found to be 1000 ppb, 40 ppb, 100 ppm and 0.2 ppm, respectively. This water is unsuitable for drinking due to high concentration of : (1) Lead (2) Nitrate (3) Iron (4) Fluoride
What is the molecular weight of a gas if a 21.0 g sample has a pressure of 836mmhg at 25.0 degrees c in a 2.00L flask
The diameter of Earth at the equator is 7926.381 mi. Round this number to three significant figures, and express it in standard exponential notation.
Use this information to compare how long it will take to obtain molecular scale mixing of such a gas over i) distance 1*10^-4 m and ii) 10m
The saturated solutions of Ca(OH)2 contain a white solid which was removed by filtering. What is this solid? If it were not removed, how would it affect the calculated (observed) values for Ksp and solubility of Ca(OH)2?
What is the heat capacity of the bomb?(Assume that the quantity of water surrounding the bomb is exactly 2250 g).
Glutamic acid (C5H9O4N) is used as one of the reagents for a standard to check the BOD test. Determine the ThOD of 150 mg/L of glutamic acid. Assume the following reaction
Which combination of atoms is most likely to produce a compond with covalent bonds?a) K and Brb) Al and Sc) S
Question- How would you prepare 40.0mL of 0.600 M HNO3 from a stock solution of 4.00 M HNO3. What volume (in mL) of the 4.00 M HNO3 solution will you need
at 900k the following reaction has kp0.345. 2so2 o2-gt2so3. in an equilibruim mixture the partial pressure of so2 and
a certain gas expands in volume from 1.75 to 8.32l ataconstant temperature. calculate the work dine in joules by the
A reaction mixture initially containing 0.520 M H2S and 0.520 M SO2 was found to contain 1.0 x 10 -3. A second reaction mixture at the same temperature initially contains 0.245 and 0.335. calculate the equilibrium concentration of H2O in the secon..
How many atoms are contained in a block of aluminum metal measuring 6 mm x 8 mm x 18 mm. The density of aluminum is 2.7 g/cm3.
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