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Question- Explain (using chemical equations) what happens when iron pyrite in mine tailings is exposed to air. What are some of the environmental consequences of this?
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a 255- flask contains pure helium at a pressure of 754 . a second flask with a volume of 470 contains pure argon at a
Calculate the solubility of zinc hydroxide, Zn(OH)2, in 1.00 M NaOH. Ksp = 3.0 × 10-16 for Zn(OH)2, Kf = 3.0 × 1015 for Zn(OH)42-
For the cell reaction, Cu^2+(aq) + Zn(s) (arrow) Cu(s) + Zn^2+(aq), E^* cell = 1.10V. Use the Nernst equation to determine E cell when the molar concentrations of Zn^2 and Cu^2+ are 1.0 M and 1.0 x10^-7 M, respectively.
The North American record for highest recorded barometric pressure is 31.85in Hg , set in 1989 in Northway, Alaska. 1. Convert this pressure to millimeters of mercury (using 4 significant figures) 2. convert this pressure to atmospheres
The human body obtains 955 of energy from a candy bar. If this energy were used to vaporize water at 100.0 , how much water (in liters) could be vaporized? (Assume the density of water is 1.00.)
a particular sample of rainwater is 0.2 ppb. Assume the density of rainwater is close to 1.00 g/mL and find the molar concentration of C20H42.
Methyl Orange was synthesized using a diazo-coupling reaction. Show how you would synthesize Yellow #3 and Red #32
Determine the volume of 02 (at STP) formed when 50.0g of KClO3 cedomposes according to the following reaction. The molar mass for KClO3 is 122.55g/mol. 2KClO3(s)-->2KCl(s)+3O2(g)
One mole of monoatomic ideal gas expands adiabatically at initial temperature T against a constant external pressure of 1 atm. from one litre to two litre.
how many moles of glucose C6H12O6 can be burned biologically when 10.0 mole of oxygen is available
What is the volume percent of a solution prepared by dissolving 9 g of NaOH in enough water to make a final volume of 120 mL. How many mL of a 10% solution can be made from the solution in part a
A solution of 0.312 M KOH is used to neutralize 20.0 mL H3PO4 solution. H3PO4(aq)+3KOH(aq)---------->K3PO4(aq)+3H2O(l) If 30.3 mL KOH solution is required to reach the end point, what is the molarity of the H3PO4 solution
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