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The element rhenium (Re, atomic number 75) has two naturally occurring isotopes, Re-185 (mass = 184.935 amu) and Re-187 (mass = 186.956 amu). Calculate the percent abundances of the isotopes of rhenium.
A balloon containing 34.5 L of a gas at room temperature (25.0 oC) is heated to 73.5 oC. What is the volume of the balloon at this new temperature?
Steam distillation may be used to separate a mixture of p-nitrophenol and o-nitrophenol.
suppose a can contains gas at a pressure of 755 mm Hg and a temperature of 25 degrees celsius, what would be the pressure if the can was heated to 1155 degrees celsius ?
A mixture of NaCl and NaBr has a mass of 2.08g and is found to contain 0.78 of Na.What is the Mass of NaBr in the mixture.
A sample of a gas occupies 1470 mL at 60.7?C and 740 torr. What volume would it occupy at the same pressure and 450?C.
What is the geometry and hybridization of the carbonyl carbon in carboxylic acids and their derivatives.
How many kilograms of CO2 are produced from the complete combustion of 1.00L of gasoline assume that the gasoline has the formula C8H18.
Heart pacemakers are often powered by lithium-silver chromate "button" batteries. The overall cell reaction is: 2 Li(s) + Ag2CrO4(s) -> Li2CrO4(s) + 2 Ag(s)
If the density of mercury is 13.6 g/mL. What is the mass in grams of 15.6 L of mercury?
determine How many formula units(formula un) of sodium iodide(NaI) are present in 9.54 grams of this compound and also calculate how many gms of sodium iodide are present in 6.07E+21 formula units of this compound.
How does one predict the regiochemistry of the products of aromatic reactions like nitration? What factors are responsible for the product ratios seen in such reactions?
For the equilibrium H2(g)+ CO2 (g) H20 (g) + CO(g) Kc = 3.18 at 1106K. If each of the four species was initially present at a concentration of 3.000M, calculate the equilibrium concentration of the CO(g) at this temperature
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