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Iron pyrite is often called "fool's gold" because it looks like gold (see page 12). Suppose you have a solid that looks like gold, but you believe it to be fool's gold. The sample has a mass of 23.5 g. When the sample is lowered into the water in a graduated cylinder (see Study Question 63), the water level rises from 47.5 mL to 52.2 mL. Is the sample fool's gold (d = 5.00 g/cm3) or "real" gold (d = 19.3 g/cm3)?
Calculate the morality of a solution made by dissolving 0.750 grams of Na2 SO4 in enough water to form exactly 850 mL of solution. How many moles of KMnO4 are present in 250 mL of a 0.0475 M solution?
The volume of seawater on Earth is about 3.3 x 10^8 mi^3. Because it contains salts, mostly sodium chloride, its density is about 1.03 g/mL, a little higher than that of pure water. The concentration of sodium chloride is about 3.5% by mass.c
Calculate the amount of heat needed to convert 96 g of ice at -24C to water at 28C. The specific heat capacity of H2O(s) is 2.1J/g*C.
A sample of zinc nitride, Zn3N2, contains 39.0 g of zinc. How many nitride ions are present
the products formed when nitroglycerin undergoes hydrolysis
when 28.6 kg of fe2o3 react with 17.2 kg of co and 6.3 kg of fe are recovered what is the percent yield for the
Based on position in the periodic table and electron configuration, arrange these elements in order of decreasing Ei1. Rank the elements from highest to lowest ionization energy
Which of the following solutions would have the highest pH value. Assume that they are all initially 0.10 M concentrations of weak acid at 25 degree C.
if the freezing point of a 0.107 m ch3cooh solution is -0.200degc calculate the percent of the acid that has undergone
The barometer in the lab has a 626mm column of mercury and the thermometer reads 26degrees celsius. Given that air is 78% by volume nitrogen, what is the density of nitrogen in the lab. Can you do your experiment or should you just go home
When 15 mL of a solution containing 1.6 M Na2S is diluted to 32 mL, a dilute solution is formed. How many moles of Na+ ions are contained in 30 mL of the dilute solution
How do you estimate energy change using bond reactions in a complete methane combustion
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