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The following diagram is a representation of 20 atoms of a fictitious element, which we will call nevadium (Nv) The red spheres are 293 Nv, and the blue spheres are295 Nv.
(a) Assuming that this sample is a statistically representative sample of the element, calculate the percent abundance of each element .
(b) If the mass of293 Nv is 293.15 amu and that of 295 Nv is 295.15 amu, what is the atomic weight of Nv? [Section 2.4]
Even though butanols have the same number of the same atoms, we see large differences in their ability to dissolve water. How do you account for this? How might you account for the much smaller differences observed among the pentanols
A set of data gave an average unpopped kernel of 0.12 grams. How many kernels are in a pound of unpopped corn?
With this reaction 4FeS2+11O---> 2FeO3 +8SO2 A) how many molecules of SO2 are contained in 0.526 of this component? B) if 1.42 g of FeS2 reacts , how many SO2 grams are formed
What is the value of Delta S when 2.7g of CH4 is compressed from 29.0 L to 18.0 L at a constant temperature of 100 C?
How many photons are required to heat 235 mL of coffee from 25.0 C to 62.0 C? Assume that the coffee has the same density, 0.997g/mol , and specific heat capacity, 4.184 J?g*K, as water over this temperature range.
Capital V will stand for Vbarr(molar volume) (P+(a/V^2))(V-b)=RT is the van der Waals equation and when it is solved for V you obtain cubic equation V^3-(b+(RT/P))V^2+(a/P)V-ab/P=0
Problem- The concentrations of NaCl and KI are at 0.150M and 0.100M respectively, in the following electrochemical cell
Barium Nitrate is a not very soluble nitrate. Calculate the Ksp (at 25 degrees) from the following ΔG's
What characteristic absorption bands would you expect to find the infared spectrum of caffeine
a sample of air contains 78.08 nitrogen 20.94 oxygen 0.05 carbon dioxide and 0.930 argon by volume. how many
The activation energy for the reaction NO 2 (g)+CO 2 (g)?NO(g)+CO(g) is E a = 100kJ/mol and the change in enthalpy for the reaction is ΔH = -200kJ/mol. What is the activation energy for the reverse reaction?
A 50.00-mL sample of aqueous Ca(OH)2 requires 34.66 ml of a 0.966 M nitric acid for neutralization. Calculte the concentration (molarity) of the original solution of calcium hydroxide
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