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If your body develops a charge of -11 (microcoulombs), how many excess electrons has it acquired?
Concentrated sodium hydroxide is 19.4 M and has a density of 1.54g/mL. What is the molality of concentrated NaOH?
A cell has a standard emf of +0.116 V at 298K. What is the value of the equilibrium constant for the cell reaction if n=1, n=2, and n=3
A gas mixture contains 8.10g of N2, 1.70 g of H2, and 14.70 g of CH4. what is the mole fraction of H2 in the mixture
paris is one of my favorite european cities. this question relates to a possible problem with parisian drinking water.
A 4.70 g nugget of pure gold absorbed 278 J of heat. The initial temperature was 28.0°C. What was the final temperature.
in a coffee-cup calorimeter 1.80 g of nh4no3 is mixed with 75.0 g of water at an initial temperature of 25.00degc.
If a mixture of heptane (bp = 98C) and octane (bp=126C) is places in a gas chromatography machine, at what temperature should the oven be set
Lactic acid, CH3CH(OH)COOH, has a Ka value of 1.4x10-4. How many grams of lactic acid must be added to make 151.0 mL of solution with a pH of 2.21
The normal boiling point of methanol (CH3OH) is 64.7oC, and its molar enthalpy of vaporization is Hvap = 71.8 kJ/mol.
Of the choices below, which would be the best for the lining of a tank intended for use in storage of hydrochloric acid.
What is the concentration of H+ in 0.0025 M HNO3? What is the pH of this solution? What is the OH- concentration in this solution
You need to dissolve CaCl2 in water to make a mixture that is 31.5% calcium chloride by mass. If the total mass of the mixture is 380.6 g, what masses of CaCl2 and water should be used
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