Identifying the empirical formula of the compound
Analysis of a sample of a covalent compound showed that it contained 14.4% hydrogen and 85.6% carbon by mass. What is the empirical formula for this compound?
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Based upon the results of this experiment, indicate whether Br+, Br-, or Br· initiates the isomerization of dimethyl maletae to dimethyl fumarate.
An average cup of coffee contains about 125 mg of caffeine, CaHroNqOz. If a student drinks 5 cups of coffee before their 8 AM Chem lecture in a desperate attempt to try to stay awake:
Calculate the equilibrium concentration, in mol-L, of the following gases in the container at 483 K a) H2 b) H2S. Calculate the value of the equilibrium constant, Kc, for the decomposition reaction at 483 K
A 1kg ball is dropped from the top of a cliff and falls with a constant acceleration due to gravity. Assume that effects of air resistance can be ignored.
Rubidium has two naturally occurring isotopes: with mass 84.9118 and a natural abundance of 72.17%, and with mass 86.9092 and a natural abundance of 27.83%. Calculate the atomic mass of rubidium.
Calculate the pH of each of the following solutions. Calculate the pH after .020 mol NaOH is added to 1.00 L of each of the four solutions in question 1
Calculate the mass of the third isotope of neon in (a) amus and (b) in relation to the mass of an atom of 12C (i.e. the mass of the neon isotope = (some factor)*(the mass of an atom of 12C)).
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