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if 58.7L of H2 are collected over water at 20C and 758 torr, what is the mass percent yield? (vapor pressure of water at 20C is 17.5torr)
Acetone (nail polish remover) has a density of 0.7857 g/cm^3. a. What is the mass, in g, of 28.56 mL of acetone? b. What is the volume, in mL, of 6.54 g of acetone?
A gaseous mixture of O2 and N2 contains 36.8% nitrogen by mass. What is the partial pressure of oxygen in the mixture if the total pressure is 685 mmHg.
A solution of ammonia and water contains 3.00×10^25 water molecules and 5.80×10^24 ammonia molecules. How many total hydrogen atoms are in this solution?
What would the net ATP yield if a muscle cell takes a glucose molecule, stores it as part of a glycogen molecule and later releases it and sends it through glcolysis.
What color- red or blue- would you expect each of the following to produce when added to litmus
Find out the eq molar concentration of SCN- in the system.( Kc=[FeNCS2+]/[Fe3+][SCN-] =271.5)
what will be the theoretical yield of bromobenzene in given reaction as C6H6 + Br2 → C6H5Br + HBr also find out percentage yield when actual yield of bromobenzene was found 56.7 g?
How long would it take for a radioactive isotope with a half life of 2 weeks to lose at least 70% of its radioactivity? Describe two clinical uses of Radioactivity.
A weather balloon at Earth's surface has a volume of 3.9 L at 275 K and 775 mm Hg. if the balloon is released volume reaches 4.2 L at 711 mm Hg what is the temperature.
A 6.11 g sample of Cu---Zn alloy reacts with excess aqueous HCl producing 1.26 L of H2(g) at 22.0 degrees C and 728 torr. Since only the Zn portion of the alloy reacts, calculate the percent Cu in the alloy.
The catalytic converter on your automobile contains small amounts of a precious metal catalyst. Which of the following components would you expect to be decreased in your tailpipe emissions.
How much heat energy, in kilojoules, is required to convert 74.0 g of ice at -18.0 C to water at 25.0 C ?
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