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The density of an unknown element in the gaseous state is 1.60 g/L at300 K and 1 atm. Which of the following could be the element?
a) He
b) Ne
c) Ar
d) O2
e) Cl2
Determine which half-cell will undergo oxidation and which will undergo reduction, identify anode and cathode, and calculate the voltage for the cell.
the solubility of mgoh2 s in wataer at a certain temperature is 1.0 x 10-4 moll. calculate the value of ksp for mgoh2 s
At a certain temperature 16.7 mL of .45 M NaOH solution is required to titrate 30.0 ML of a 0.1 M KCL solution saturated with potassium bitartrate. What is the Ksp of KHT at this temperature
using the trend in the periodic table rank the following atoms in order of increasing electronegativity1. li na h2. o c
Actually, the density of air decreases as the altitude decreases, halving roughly every 5.8 km. At what approximate altitude will it reach about 10-6 atm
The first-order rearrangement of CH3NC is measured to have a rate constant of 3.61 x 10-15 s-1 at 298 K and a rate constant of 8.66 × 10-7 s-1 at 425 K. Determine the activation energy for this reaction.
Forty miles above the earth's surface, the temperature is 250 K and the pressure is 0.12 mm Hg. What is the density of air at that altitude. Assume the molar mass of air is 28.95 g/mol
calculate the moles of hydrogen and the pressure in each flask where the volume is negligible. Each flask is originally 275K with .455 mols of hydrogen gas and .7atm of pressure. Then one flask is heated to 500K while the other remains at 275K
The volumes of a solution containing 1.10ppm Zn+2 shown in the table below were pipetted into separatory funnels, each containing 5.00mL of an unknown zinc solution. Each was extracted with three 5-mL aliquots of CCl4 containing an excess of 8-hyd..
water can be separated into hydrogen and oxygen gases by using electricity to break the bonds in a process called
Determine the expression for the rate of reaction with respect to each of the reactants and products
A gaseous mixture of 02, H2 and N2 has a total pressure of 1.50atm and contains 8.20g of each gas. Find the partial pressure of each gas in the mixture?
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