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.134 mol of KCl and .257 mol of CaCl2 were dissolved in water. calculate the total number of moles of Cl- ions in the solution
A 0.5078g sample of impure nitrobenzene was treated with 1.044g of tin. when the reaction was complete, the residual tin was found to weight 0.338g. Calculate the percentage of nitrobenzene in the sample.
63.0 mL of a 1.20 M solution is diluted to a volume of 208 mL. A 104-mL portion of that solution is diluted using 157 mL of water. What is the final concentration.
what is the percent relative error? Please explain by showing work. Are these measurements more precise or more accurate? What is the purpose of repetition in measurements?
What volume of .2 M Na2SO4 will completely react with 50 mL of .135 M Ba(NO3)2
2I2 + N2H4 4HI + N2 a.How many grams of I2 are needed to react with 36.7 g of N2H4?
The density of titanium metal is 4.51g/cm3 at 25C. what mass of titanium displaces 125.0ml of water at 25c.
Express the concentration of a 0.0720 M aqueous solution of fluoride, F-, in mass percentage and in parts per million
If the mass of the ore from which the gold was extracted is 166.0 g, what percentage of the ore is gold.
Iron has a reported average atomic mass of 55.85 amu. If iron has two isotopes, one of which has 29 neutrons and an isotopic abundance of 57.50%, what is the mass of the other isotope?
In an excess amount of oxygen, how many grams of CO2 (g) are theoretically produced from the combustion of 901.0 g of glucose [C6H12O6 (s), molar mass of 180.2 g/mol]?
How long would it take for 1.50 mol of water at 100.0 0C to be converted completely into steam if heat were added at a constant rate of 15.0 J/s?
Synthesis of Nylon: Relative Reactivities of Acid Chloride, Acid Chlorides are known to be reactive towards water, however successful polymer preparation can be made with 5% aqueous
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