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Calculate the intermolecular collision frequency and the mean free path in a sample of helium gas with a volume of 5.0 L at 27C and 3 atm. Assume the diameter of a He atom is 50 picometers (pm).
If the titration required 23.95 mL of 0.2556 M HCl to reach the endpoint, calculate the equilibrium molar concentration of B4O5(OH)4 2- in the saturated solution.
A solution is created by adding 0.05 moles of H2CO3 (3.1 g, total mass) to 5-L of water, resulting in a pH of 4.2. Now, we add sodium hydroxide (NaOH, strong base) until the pH reaches 7. You can neglect any changes in volume. What is the alkalini..
The electronegativty for both sulfur and carbon is 2.5. Therefore the compound CS2 would be expected to A) be ionic with C as the anion
Compute the molecular formula of CH 3 COOH the percent composition of acetic acid is 39.99% C and 6.73% H. The remainder of the compound is oxygen.(The molar mass of acetic acid is 60.06 g/mol.)
Assuming the various solutions are used without dilution with water,how would you prepare 50ml of a buffered medium to keep pH essentially constant at 5.40 in an enzyme experimement in which acid will be produced?
design a series of reactions to convert ethanol to 2-butanol. You can use other inorganic reagents you need, but only ethanol
A compound is 40.0%C, 6.70%H, and 53.3%O by mass. Assume that we have a 100.g sample of this compound. What are the subscripts in the empirical formula of this compound?
The recommended daily dietary intake of calcium for adult men and pre-menopausal women is 1100 mg/day Calcium citrate , Ca3(C6H5O7)2. What mass of calcium citrate would be needed to provide the recommended daily intake of calcium
A solution is prepared by dissolving 246 g of sucrose (C12H22O11) in 624 g of water. What is the vapor pressure of this solution at 30°C? (The vapor pressure of water is 31.8 mmHg at 30°C.)
Using 2-butanone as an example, explain why this is true. Draw the structures of all of the products
NaOH was added. Assuming no volume change, calculate the pH of the solution
66.0 mL of a 1.60 M solution is diluted to a volume of 288 mL. A 144-mL portion of that solution is diluted using 163 mL of water. What is the final concentration.
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