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An element has hcp packing with a hexagonal unit cell. Its density is 3000 kg/m3 and the unit cell volume is 5.00 x 10-23 cm3. Calculate the molar mass (g/mol) of the element to three significant figures.
How many theoretical plates does the column have What is the plate height (in mm) of the column if the column is 11.7 cm long
Suppose you have a sample of sodium weighing 11.42 g. How many atoms of sodium are present in the sample.
A bottle contains 225 mL of insulin at a concentration of 50.0 mg/mL. What is the total mass of insulin in the bottle?
A compound of a transition metal and iodine is 65.1% metal by mass. How many grams of iodine is present in 859 g of this compound?
Sulfhydryl groups have the ability to react with the alkylating reagent N-ethylmaleimide (NEM) in chemical modification experiments. When NEM is added to a purified solution of creatine kinase
Fumaric acid, which occurs in many plants, contains 41.4% C, 3.47% H, and 55.1% O by mass. A 0.5 mol sample of this compound has a mass of 58.0 g.
Calculate the integral of dqrev / T for each of the 4 steps in the Carnot cycle of, and sum them to prove that their sum equals zero
Several significant signals have been identified on the spectrum. Assign these signals to corresponding functional groups in the molecule of aspirin
calculate the molar mass of the solute (acetic acid) and suggest what the structure might be.
Describe reasons the paper's physical properties are different from the water's physical properties.
Which of the following molecules is expected to form hydrogen bonds in the pure liquid or solid phase: ethylene glycol (HOCH2CH2OH), formaldehyde (H2CO), and dimethyl ether (CH3OCH3)?
When making 2-hexene, NaH is the only base that can cause the elimination process from 2-chlorohexane to make this product. Dan thinks that this reaction would be best run in Acenotrile,
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