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A certain element has three isotopes. The isotopes masses (amu) and abundances are 159.37( 30.60%), 162.79 (15.79%) , and 163.92(53.61%). Explain what is the average atomic weight (amu) of the element?
1-A 500 mL NaCl solution is diluted to a volume of 1.24 L and a concentration of 8.00 M. What was the initial concentration C1? 2- write the total ionic equation.Be sure to include the charges on the ionic species and the physical state of all the..
Determine value for the rate of formation of HCl during the same interval of 3 seconds If the rate of disappearance H2 = -0.13 M/s at this specific time?
Calculate the change in pH when 46.00 mL of a 0.600 M solution of NaOH is added to 1.00 L of a solution that is 1.00 M in sodium acetate
Explain what features do all the resonance forms of a molecules or ion have in common. Choose all that apply.
NO (g) + O3 (g)-> NO2 (g) + O2 (g) For the reaction given, the frequency factor A is 8.7 x 1012 s-1 and the activation energy is 63 kJ/mol. What is the rate constant for the reaction at 75°C.
A sample of nitrogen gas in a 4.5-L container at a temperature of 27 C exerts a pressure of 4.1 atm. Calculate the number of moles of gas in the sample
A solution is prepared by mixing 0.0300 mol CH2Cl2 and 0.0500 mol of CH2Br2 at 25°C. Assuming the solution is ideal, calculate the composition of the vapor
organic reactions can be classified as substitutions eliminations or additions and the reagents can be classified as
if a power plant burning 10000 metric tons of coal per day with 6 excess air emits stack gas containing 222 ppm by
Calculate the freezing point of a solution that contains 8.5g of benzoic acid (C6H5COOH, MW=122) in 75g of benzene, C6H6.
Depict the structures of the compounds as well as predict whether they can diffuse across a membrane without facilitated diffusion. Define why did you come to the conclusion.
consider the following equilibrium process at 686degcco2g h2gnbspnbspcog h2ogthe equilibrium concentrations of the
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