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Calculate the percent of radioactive parent atoms remaining 2 hours after medicine is administered. The percent is the fraction x 100%.
Calculate the pH and molar concentration of each protonated form for a 0.133 M solution of NaHA.
Which of the following reactions would be classified as oxidation-reduction? 2Na(s)+Cl2(g)-----2NaCl(s) Na(s)+CuCl(aq)-------NaCl(aq)+Cu(s) NaCN(aq)+CuCl(aq)NaCl(aq)+CuCN(s)
What are the van't Hoff factors of C2H5OH (no dissociation), NaCl (full dissociation), Na2CO3 (full dissociation) and H2SO4 (64% dissociation)
Calculate the mass in grams for pure silver sample that loses 3.10 when its temperature drops from 138 to 20.
What is the molarity of ZnCl2 (aq) that forms when 15.0 g of zinc completely reacts with an aqueous solution of Copper (ii) chloride.
The rate law for the reaction, 2NO(g) + O2(g) -- 2NO2(g), is found to be: rate of reaction=k[NO]2[O2]2 (PLEASE note that the 2's after the concentrations are powers, so we have NO to the power of 2 and O2 to the power of
The sweetener is tested in a bomb calorimeter to determine its energy content per gram. When 5.278 g of the sweetener are combusted in a calorimeter with a heat capacity of 17.63 kJ/°C a temperature increase of 1.82 °C is measured. What is the ene..
To which of the following would the addition of an equal volume of 0.70 M NaOH lead to a solution having a lower pH? A. 0.35M HCl B. 0.80 M KOH C. water D. 0.45 M NaNO3
An organic mixture weighing 2.416 grams contains inert materials and benzoic acid. The benzoic acid is extracted into 100.0 mL of 0.1513M NaOH. After extraction
compare in your mind 3 different liquids pure ethanol a 50 ethanolwater mixture and a 50 ethanolmethanol mixture. rank
how many number of element of unsaturation are implied by the molecular formular C5H5NO2
If a 1.00g sample of a carbon-containing compound is burned in air, 0.75g of CO2(the only carbon-containing product) is produced. What is the mass% carbon in the compound
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