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A piece of iron weighing 85.690 g was burned in air. the mass of the iron oxide produced was 118.350 g. What are the moles of iron in the original sample?
Assume that you have a cylinder with a movable piston. What would happen to the gas pressure inside the cylinder if you do the following? Decrease the volume to one third the original volume while holding the temperature constant.
What might one do to verify that the global strain-energy minimum has been identified
Write a balanced chemical equation when Magnesium metal burns in oxygen to form magnesium oxide, MgO
A solution is prepared by dissolving 1.00 g of Compound B in enough water to create 250.0mL of solution. What is the molarity of Compound B in this solution?
Two gas tanks are linked by a connecting tube of negligible volume with a valve. One contains 15 L of nitrogen at 7.2 atm of pressure. The other contains 8.3 L of helium at 4.1 atm of pressure.
Hydrogen sulfide () is a common and troublesome pollutant in industrial wastewaters. One way to remove is to treat the water with chlorine
Other than S=C=S; can I have S triple bonded to C single bonded to S? Wouldn't there be three electrons left on the triple bonded S; it would be sharing three when it started with six I don't understand? Help please.
The buffer has a concentration of 150 mMol ( 150 mM of KH2PO4 / 150 mM K2HPO4. The pKa of the drug ephedrine is 9.6. Will the drug have a negative, positive, or neutral?
A sample of air contains 78.08 % N2, 20.94% O2, 0.05 %CO2, 0.93% Ar by volume. a) How many molecules of each gas present in 1.00 L sample at 25 C and 1.00 atm. b)What is the partial pressure of each gas?
If 20.0 mL of 0.12 M cobalt(II) nitrate is reacted with 15.13 mL of 0.097 M sodium phosphate, which of the two reactants will be left over and which will be completely consumed.
Calculate the concentration of sodium ion in a solution made by diluting 350.0 mL of 3.00 M sodium carbonate to a total volume of 2.00 L.
If 45.8 grams of aluminum metal are reacted with excess HCl, what volume of H2 gas would be generated at 23.0 ºC and 1.00 atm pressure?
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