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When 1.150 grams of an unknown nonelectrolyte dissolves in 10.0 grams of water, the solution freezes at -2.16°C. What is the molecular weight of the unknown compound? Kf for water = 1.86°C/m.
88.6 g/mol
116 g/mol
74.2 g/mol
99.1 g/mol
132 g/mol
Important information about Molarity, You have 20 ml of 10% Bromophenol Blue (BPB). Using a 10% stock, how would you prepare 5 ml of a 0.2 % stock?
Calculate how wide is the cloud of organisms at the time peak concentration takes place at the intake pipe.
Is there an analytical technique we could employ to verify that the camphor is also racemic? What type of instrument would you use? What kind of results would you expect from a racemic product?
when 7.00 moles of gas A and 3.00 moles of gas B are combined, the total pressure exerted by the gas mixture is 1.0 atm. What is the partial pressure exerted by gas a in this mixture
Calculate the concentration of ethanol in wine in terms of mass percent and molality. mass percent: (answer in percent) molality
Determine the oxidation number for the indicated element in each of the following substances.
Propose a reasonable synthetic strategy for the synthesis of trans-6-methyl-3-heptene from 4-methyl-1-pentyne.
Formic acid (Ka= 1.7 x 10^-4) and sodium formate were used to prepare a buffer solution of pH 4.31. The concentration of the undissociated formic acid in this buffer solution was 0.80 mol/L
calculate the IHD and select all the types of unsaturation that might be present in the molecule based on the IHD.
How much heat is needed to warm 45.6 grams water from 23.0° C to 40.0 °C?
BNCT relies on the initial targeting of tumor cells by an appropriate chemical compound tagged with 10 5 B , which preferentially concentrates in tumor cells.
When 1.43g of the hydrocarbon is burned, 2.39 grams of water and 4.40 grams of carbon dioxide is collected. Determine the empirical formula of the hydrocarbon. Name the hydrocarbon.
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