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What environmental issue is each of the following chemicals associated with and write the chemical reaction it produces or reacts with it. CO2 and CCl3F.
Based on (i), write an equation showing how ?HA is related to ?HB and ?HC. How do both diagram (i) and your equation relate to the fact that enthalpy is a state function?
Calculate the magnitude of the current in amperes if the number of moles of hydrogen gas produced is 5.36×10-4
4.What is the mole fraction of solute in a 3.66 m aqueous solution? 5.You need to dissolve CaCl2 in water to make a mixture that is 38.0% calcium chloride by mass. If the total mass of the mixture is 832.9 g, what masses of CaCl2 and water should be ..
Problem- Calculate T, W, and L for a 340 base pairs closed circular plasmid with 3 negative supercoils. Assume the DNA remains entirely B-form
A 50.0-mL sample of 2.0 x 10-4 M CuNO3 is added to 50.0 mL of 4.0 M NaCN. Cu+ reacts with CN- to form the complex ion [Cu(CN)3]^2: [Cu(CN)3]^2- Cu+ (+) 3CN- K = 1.0 x 10^-9
Sulfur dioxide and nitrogen dioxide form an acidic compound in the atmosphere.- Locate a case where acid rain has adversely affected a lake in either Vermont or New Hampshire.
A 0.20 M solution of hydrofluoric acid (HF(aq)) has a pH of 3.96 at 25 oC. Calculate the Ka and Percent Ionization of hydrofluoric acid.
Calibration of a glass electrode gave a reading of 126.7 mV with saturated potassium hydrogen tartrate buffer standard (pH = 3.557) and a reading of -202.4 mV with 0.01 m borax buffer standard (pH = 9.139), both measured at 30°C.
calculate the end point ph when 25 ml of 0.01 moll hcl solution reacts exactly with 25 ml of 0.1 moll nh4oh
The mole fraction of toluene in an ideal solution of cyclohexane and toluene that has a vapor pressure equals to 53.2 mmHg at 25oC is: A) 0.25 B) 0.28 C) 0.31 D) 0.35
The half life of Iodine-131 is 8.0252 days. If 14.2 grams of I-131 is released in Japan and takes 31.8 days to travel across the Pacific
It takes 2 26 kilojoules of energy to evaporate each gram of water suggest a way to include the evaporated water in your calculation.
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