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What do you do when you are calculating the empirical and molecular formulas of a compound and the percent composition by mass totals greater than 100%?
what wind flow rate entering the canyon would produce a pollutant concentration greater than 0.0025 gmol/ft^3 in the air coming out of the canyon?
Barium chlorate in solution mixed with Silver fluoride
A student is asked to determine the formula of a hydrate of colbalt (II) chloride. The mass of the empty clean, dry crucible and cover, after heating is 22.446 g. A sample of 0.324 g of cobalt chloride is added to the crucible.
What is the purpose of running both Dalton Vll mixed markers and lanes with individual markers on SDS-PAGE?
Grignard reagents can act as both a nucleophile and a base. Consequently, what would you expect to happen if that during the preparation of the phenylmagnesium bromide Grignard reagent
A student is concentrating a solution having a polypeptide of modest molecular weight by pressure filtration through a membrane. The solute concentration on the feed side of the membrane is 0.10 M and the temperature is twenty five degree celsius.
at ordinary body temperature 37 the solubility of in water in contact with air at ordinary atmospheric pressure 1.0
A sample of a liquid hydrocarbon know to consist of molecules with five carbon atoms is vaporized in a .204 L flask by immersion in a water bath at 101?. The barometric pressure is 767 torr, and the remaining gas weighs .482 g. What is the molecul..
the mass density of phosphorus vapour is 0.6388 kg per meter cube. What is the molecular formular of phosphorus under these conditions
produces carbon dioxide and water. After 5.6 of ethanol (density = 0.789 ) was allowed to burn in the presence of 12.5 of oxygen gas, 3.10 of water (density = 1.00 ) was collected. Determine the theoretical yield of H2O and the percent yield for th..
a united nations toxicologist studying the properties of mustard gas sch2ch2cl2 a blistering agent used in warfare
The elemental mass percent composition of malonic acid is 34.63% C, 3.87% H, and 61.50% O. Determine the empirical formula of malonic acid. Express your answer as a chemical formula.
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