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If 0.52 moles of terephthalic acid are reacted with 0.50 moles of ethylene glycol, what is the number average degree of polymerization at 90 and 100% reaction?
how much of heat is gained by nickel when 500 g of nickel is warmed from 22.4 to 58.4C?
When 0.100 mol of toluene(C7H8(l)) is burned in this calorimeter, the temperature is raised by 0.615C. The equation for the combustion reaction is
a 150 ml buffer solution containing 0.100 m hydrocyanic acid hcn ka6.2 x 10-10 and .100 m soudium cyanide nacn has 30.0
An unknown compound contains carbon, hydrogen, oxygen, and sulfur atoms. When a 10.00 mg sample of the unknown compound was combusted, it produced 16.27 mg of CO2, 5.55 mg of water, and 7.90 mg of SO2.
The ionization constants for sulfurous acid are Ka1 = 1.4*10^-2 and Ka2 = 6.3 * 10^-8. Species that need to be calculated (Molarity):
You are investigating the metabolism of glutamic acid in E coli, which enters the TCA cycle as a-Ketoglutarate following an initial transamination reaction.
What will be the average atomic mass of element A if percentage abundance of these two isotopes are 48.17 % and 51.83 % respectively. ?
Assume that the aluminum atoms can be represented as spheres, as shown in the drawing (Part C figure) . If each {rm Al} atom has a radius of 1.43 {rm AA}, what is the length of a side of the unit cell?
the compound x2y has a molar mass of 110.27 gmol. the ratio of xy by mass in the compound is 2.44 1. what is the
A 5.00g sample of water vapor, initially at 155C is cooled at atmospheric pressure, producing ice at -55C. Calculate the amount of heat energy lost by the water sample in this process, in kJ.
an automobile gasoline tank holds 49kg of gasoline. when the gasoline burns 172kg of oxygen are consumed and carbon
At 2000C Kc is 2.4^3 for 2NO N2+O2, the initial concentration of NO is .170M what is the equilibrium concentration of NO?
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