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A solution containing 28.50mg of an unknown protein per 26.0mL solution has an osmotic pressure of 3.80torr at 35?C. What is the molar mass of the protein?
An automobile gasoline tank holds 22kg of gasoline. When the gasoline burns, 85kg of oxygen is consumed & carbon dioxide & water are produced? What is the total combined mass of carbon dioxide & water that is produced?
25 mL of 0.10 M HCl is mixed with 25 mL of .43 M NH3. What is the resulting pH?
A compound contains only carbon, hydrogen, nitrogen, and oxygen. Combustion of a 2.18 g sample burns in excess oxygen yields 3.94 g of CO2 and 1.89 g of H2O. A separate experiment shows that a 1.23 g sample contains 0.235 g of N.
cube of a silver-colored metal with a volume of 64 cm3 has a mass of 672 g. The density of pure silver is 10.5 g/cm3. Is the metal pure silver?
The concentrations of NaCl and KI are at 0.100 M and 0.090 M, respectively, in the following electrochemical cell:You'll need to use the Nernst equation to solve this problem
The mass of a cube of iron is 363 g. Iron has a density of 7.87 g/cm3. What is the mass of a cube of lead that has the same dimensions?
Muriatic acid is a HCl solutin available in hardware stores. A 3.00-ml sample of muriatic acid required 15.44 ml of 2.04 M NaOH for complete neutralization
how many liters of hydrogen are obtained from the reaction of 4 g calcium with excess water, at 37 Celsius and 0.962 atm?
A proton in a linear accelerator has a de Broglie wavelength of 155 pm. what is the speed of the proton?
Calculate the number of molecules inside the cell, which is 3.6um long and 1.2 um in diameter.
How many magnesiun atoms are in 3 moles of Mg3(PO4)2? 2) A substance, NxOy has the composition by mass 69.57% O. Calculate the molecular formula of this substance if its molecular mass is 92 grams.
When a Group III unknown was treated with an aqueous ammonia/ammonium chloride and ammonium carbonate, a white precipitate was produced.
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