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The equation for the Beers Law: A= -log10 I/Io. Tell what each variable represents.
Calculate the pH after 0.13 mol of NaOH is added to 1.00 L of the solution that is 0.47 M HF and 1.21 M KF.
What is the pH of an aqueous solution with a hydrogen ion concentration of [H ] = 9.4 × 10-7 M?
30.3 g of chromium(III) oxide reacts with 10.8 g of aluminum to produce chromium and aluminum oxide. If 20.7 g of chromium is produced, what mass of aluminum oxide is produced?
The reduced coenzymes generated by the citric acid cycle donate electrons in a series of reactions called the electron transport chain. The energy from the electron transport chain is used for oxidative phosphorylation.
What is the millimolar concentration of dissolved oxygen for a lake or stream under the partial pressure of oxygen and a temperature of 12?
The carbon-11 nuclide radioactively decays by positron emission. Write a balanced nuclear chemical equation that describes this process.
the mass of ahydrogen atom is 1, and the mass of an oxygen atom is 16 daltons,how many molecules does one mole of sugar(C12H22O11) contain?
which of the following solutes dissolved in 1000 g of h20 would provide a solution with the lowest freezing pts?
Calculate the volume of concentrated sulfuric acid, containing 98% H2SO4 by mass, that would contain 40.0 g of pure H2SO4.
if 5.00g helium gas is added to a 1.00-L ballon cantaining 1.00g of helium gas, what is the new volume of the ballon?
If 2.55 mol of ethane (C2H6) undergo combustion according to the unbalanced equation C2H6 + O2 -→ CO2 + H2O , how much oxygen is required? Answer in units of mol.
for each of the following slightly soluble salts write the equilibrium equation dor dissociation and the solubility product expression: a)Ag2S. b)Al(OH)3. c)BaF2.
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