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Seawater contains approximately 3.5% NaCl by mass and has a density of 1.02g/ml. What volume of seawater contains 6.5g of sodium?
If a copper-containing compound is found to be 29.2% Cu by mass, and there is only one copper atom per formula unit, what is the formula mass of the compound in amu
Prepare a standard of lidocaine in methanol with a final concentration of 1.00 mg/mL using the powder lidocaine/HCl. Show the calculations and explain how you take the salt form into account.
Calculate the freezing point of a 2 molal solution of a nonelectrolyte glucose. feezing point constant for water being 1.86 C/molal
What substances are present after the reaction is over? How many grams of ammonia are formed? How many grams of the excess reagent remain after the reaction is complete?
How many moles of each are present in the eq mixture b)Calculate the equilibrium constant
200.0 g Al (C = 0.900 ) at 95°C is added to 85.4 g H2O at 25°C. What is the final temperature of the water (and the Al)
What is the pressure inside a system when the system-side column in an open mercury manometer is 75.0 mm lower than the atmosphere side when the atmospheric pressure is 735 mm Hg?
A certain carbon-hydrogen compound contains 89.94% C by mass and the remainder is hydrogen. What is the empirical formula
How many grams of iron are required to make 2.50 L of aqueous solution containing 8.00 % Iron (III) chloride by mass. The density of the solution is 1.067g/mL
Calculate the cell potential (emf) for a galvanic cell at 298 K composed of a standard aluminum electrode (Al metal and Al 3+ ions at 1.0 M) and a standard cadmium electrode (Cd metal and Cd 2+ ions at 1.0 M.)
Which one of the following pairs is a conjugate acid-base pair?
A proton in a linear accelerator has a de Broglie wavelength of 143 pm. What is the speed of the proton?
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