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What is the molarity of a salt solution made by dissolving 280.0 mg of sodium chloride in2.00 mL of solution?
The space shuttle environmental control system handles excess CO2 (it is 4.0% by mass of exhaled air) by reacting it with LiOH, pellets to form Li2CO3 and water. If there are 7 astronauts on board ad each exhales 20.L of air per minute
A 25.0 mL sample of river water was titrated with 0.0010 M Na2Cr2O7 and required 8.3 mL to reach the end-point. What is the chemical oxygen demand, in milligrams of O2 per liter, of the sample?
The standard enthalpy of formation of n-octane is -249.95 kJ/mol. Compute the amount of heat liberated when 3.58 g of n-octane is burned completely with excess oxygen to form carbon dioxide and liquid water.
assuming ideality calculate the vapor pressure of a 1.00 molal solution of a nonvolatile solute in water at 50 degrees
The effects of pressure are significant only in affecting the solubility of (solids/ liquid/ gases) solutes dissolved in (gases/liquids/ solid) solvents.
a 25 gram sample of a metal at 75.00 c is placed in a calorimeter containing 25 grams of water at 20.00 c. the
you are given two small bottles of white crystalline carbohydrates. one is label glucose and the other dextrose. what
Calculate the pH and the concentration of the other species in a 0.0200-M aqueous solution of C6H5COOH (aq)
what is the O-N-O bond angle in NO3- (a) less than 109.5degree (b) 109.5 degree (c) 120 degree (d) greater than 120 degree
Distilled water in equilibrium with air contais dissolved carbon dioxide at a concentration of 1.0 x 10^-5 M. Calculate the pH of such a solution.
What about formation of a monobrominated alkane -- from an alkene. What sort of addition reaction (see the list of possible reagents in section 4.6 (12.6) does give a monoborminated alkane, when reacting with an alkene.
1. Assuming the volume of the football is held constant, what pressure should the balls drop to when accounting for the temperature difference from inside to outside? Was this temperature change drastic enough to be the cause of the observed deflatio..
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