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A 1.25g sample of ore containing iron pyrite (FeS2) was pulverized and ignited in air, converting the Fe2O3 and SO2. The Fe2O3 produced weighed 0.516g. What was the percent Fe in the ore?
draw all three resonance structures for the carbocation intermediate that results from STEP 2 in the electrophilic aromatic substitution reaction when benzoic acid reacts with Br2 in the presence of FeBr3
Calculate the amount of heat [kcal] released when 50.0 g of steam at 100 °C hits the skin, condenses, and cools to a body temperature of 37 °C.
Calculate the number of moles of an ideal gas in a 250. mL sealed container that has a pressure of 788 torr and a temperature of 72.1 degrees F.
Consider the titration of 46.0 mL of 1.2 M NaOH with 1.0 M HCl. Find the pH at the following points. A)After the addition of a large excess of acid
Calculate How many mL of the HCl solution was required for the titration.
What is the pressure in millimeters of mercury of 0.0100 mol of helium gas with a volume of 211 mL at a temperature of 50^circ C?
a balloon filled with helium gas has a volume of 762 mL at a pressure of 1atm. The balloon is released and reaches altitude of 6.5km, where the pressure is 0.5atm.
Determine the work done by the evolution of H 2 in the subsequent reaction on the surrounding atmosphere with1atm pressure and at 25 degree celsius temperature and express your answer in Joule
Calculate the theoretical yield of C2H5Cl when 123g of C2H6 reacts with 213g of Cl2 , assuming that C2H6 and Cl2 react only to form C2H5Cl and HCl.
A 952 cm3 container of gas is exerting a pressure of 108 kPa while at a temperature of 48 °C. Calculate the pressure of this same amount of gas in a 1236 cm3 container at a temperature of 64 °C.
What is the molarity of the salt formed when 100 mL of 1.0 M NaOH and 100 mL of 1.0 M HBr?
The electron in the n = 5 level of a hydrogen atom emits a photon with a wavelength of 1280 nm. To what energy level does the electron move?
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