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Question:
Compare the properties of elements and compounds. Give two examples of each, including one example that exists in the human body. Explain the atomic nature of one element and one compound found in human body.
If the initial concentration of N2O4 is 0.50 M, and no NO2 is initially present, what is the equilibrium concentration of N2O4? Kc = 0.0059 at 298 K N2O4 (g) 2NO2 (g)
Suppose a mercury thermometer contains 3.450 of mercury and has a capillary that is 0.180 in diameter. How far does the mercury rise in the capillary when the temperature changes from 0.0C to 25.0 C? The density of mercury at these temperatures is..
Determine the pH of a 0.075 M aqueous solution of magnesium fluoride. For hydrofluoris acid the Ka is 7.0 x 10^-2.
The rate constant for a first order reaction is 1.8 x 10 to the neg 2 s-1at 742 k and 4.5 x 10 to the neg 2 s-1 at 902 k. what is the activation energy step by step
Decomposition of nitric acid NO to N2 and O2 is second order with a rate constant of 0.0796 M-1 s-1 at 737 degrees C and 0.0815 M-1 s-1 at 947 degrees C. Calculate the activation energy.
a sample of ammonia gas at 1.2 atm compressess from 500 ml to 250 ml. if the temerature remains constant, what is the new pressure of the gas? what formulas were used?
If one needed to predict the temperature change when a series of metals with equal mass are heated, which of the following values would need to be obtained from a reference
Calculate the pH during the titration of 20.0mL of 0.27 M Propanoic Acid (HPr) with 28.0mL of 0.32 M NaOH. Ka=1.34 x 10^-5.
What is the maximum number of electrons in an atom whose highest-energy electrons have the principal quantum number n=5
Zinc and sulfur react to form zinc sulfide by the equation shown below. How many grams of ZnS can be formed when 12.0 g of Zn reacts with 6.50 g of S? (Atomic mass: Zn = 65.38, S = 32.06).
Imagine you want to determine the binding constant for a reaction. You know you will need to generate data to calculate the binding constant.
What mass of ethylene glycol, when mixed with 225 g H2O, will reduce the equilibrium vapor pressure of H2O from 1.00 atm to 0.800 atm at 100 °C?
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