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If an audiotape playing at a speed of 1.875 in. s -1 takes 45.0 min to play through one side, what is the length of the tape in feet? in meters?
As of the writing of this text, EPA standards limit atmospheric ozone levels in urban environments to 84ppb. How many moles of ozone would there be in the air above Los Angeles County.
how many moles of oxygen are consumed with the combustion of one mole of butane. C4H10?
What is the approximate percent of complexed iron in a 0.1 M Fe3+ solution containing 1 M KSCN? Kf FeSCN2+ = 1.2*10^2
Changes in atmospheric concentration of carbon dioxide during periods of artificial lighting (non-shaded) and darkness (indicated by grey shading). (b) Changes in oxygen concentration for a stand of soybean plants grown in a biomass chamber
Which of the following compounds can exhibit geometric isomerism (has cis-trans isomers)?
Approximately how much water will you need to use to prepare the hot saturated? Upon cooling in an ice-bath and subsequent filtration, how much pure phthalic acid would you expect to recover? show calculations
Suppose that 50.0 mL of a 0.0500 M solution of Pb(NO3)2 is mixed with 40.0 mL of a 0.200 M solution of NaIO3 at 25°C. Calculate the [Pb2+] and [IO3-] when the mixture comes to equilibrium. At this temperature, Ksp for Pb(IO3)2 is 2.6x10^-13.
What is the pH of 0.10M methylammonium chloride, CH3NH3Cl(aq)
Many household cleaning products contain oxalic acid, H2X2O4 , a diprotic acid with the following dissociation constants: , . Calculate the equilibrium concentration of C2O4^2- in a 0.20M solution of oxalic acid.
1. Describe the method you would use to seperate a mixture of water(boiling point=100) can be seperated from ethanol(boiling point= 60c)
What is the molarity of a solution prepared by dissolving 4.92 g of calcium nitrate, Ca(NO3)2, in 250 mL of water? (The molar mass of Ca(NO3)2 is 164 g/mol.)
a sample of cacl2 of 11.8 grams is dissolved in water of 121 grams with both substances at the normal room
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