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Copper used in electric wires comes in two flavors (isotopes): 63Cu and 65Cu. 63Cu has an atomic mass of 62.9298 amu and an abundance of 69.09%. The other isotope, 65Cu, has an abundance of 30.91%. The average atomic mass between these two isotopes is 63.546 amu. Calculate the actual atomic mass of 65Cu. (Your answer should have 4 places after the decimal.)
The vapor pressure of pure methanol, CH3OH, at 30 C is 160. torr. How many grams of the nonvolatile solute glycerol, C3H5(OH)3, must be added to 131. g of methanol to obtain a solution with a vapor pressure of 133. torr.
Calculate the mass of the sample of silver. Can you please explain how you answered this question so I can understand it on my final?
There are three resonance contributors. Draw all resonance structures for H2CNO2 and show all nonbonding electrons and formal charges
The perovskite structure is common for mixed metal oxides and halides. In this structure A and B are cations of different sizes and X is either an oxide or halide. the structure is built up of a simple cube of A cations with anions in the center o..
Calculate the work done when 25.0 g of tin dissolves in excess acid at 1.00 atm and 29°C. Assume ideal gas behavior.
A solution of KOH is prepared and standardized against 0.5418g KHP. The phenolphthalein endpoint was reached by the addition of 25.91mL KOH. What is the molarity of the KOH solution
how many grams of potassium are present in 13.6g of K2Cr2O7
A sample of 0.368 mol of a metal M reacts completely with excess fluorine to form 28.7 g of MF2. what element is represented by the symbol M?
what volume (in mL) of 1.12 M NaOH is required to react with exactly 12.3 grams of ferric chloride, according to the following equation? FeCl3(aq) + 3 NaOH(aq) → Fe(OH)3(s) + 3 NaCl(aq)
What is the hydronium ion concentration of a 0.20 M solution of an acid with a Ka
What is the relationship between Ka and pKa - what are the potential sources for errors in this experiment?
Compute the equilibrium constant for the reaction between Sn2+ (aq) and Cd(s)
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