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Which of the following are true statements about myosin? Select all the true statements. A. In a muscle cell, myosin tails group together to form a thick filament. B.The tail of the myosin molecule
What is the molar mass of a gas that occupies a volume of 1.5000 L at a pressure of 356 mmHg, a temperature of 22.5 degrees C, and weighs 0.9847 g
An electron (electron mass 9.11 x 10^- 31kg) moving near an atomic nucleus has a speed of 6 x 10^6 ± 1% m/s. What is the uncertainty in its position. 1) 1 x 10^-9m 2) 2 x 10 ^-9m 3) 1 x 10^-1
Which of the following is likely to form an ion with the most negative charge? A) aluminum B) sulfur C) chlorine D) argon
Which of the following atoms is least likely to form an ion. A) fluorine B) magnesium C) silicon D) sodium 2.For which of the following atoms do we not try to apply the octet rule? A) oxygen B) nick
For which of the following pairs are the atoms most likely to form an ionic bond with each other? A) carbon and oxygen B) calcium and chlorine C) chlorine and oxygen D) sodium and magnesium
If the quantum number ms had possible values ±1, ±2, what would be the maximum number of electrons that be placed in a single orbital
If the partial pressure of oxygen drops below 100.0 mmHg, passengers become drowsy. If this happens, oxygen masks are released. What is the total cabin pressure at which oxygen masks are dropped
You are studying an enzyme that has a catalytic efficiency of 7x10^7M-1s-1. Knowing that the Km=2.50µM and how much enzyme did you use to obtain a maximum velocity of 2520 µM/min
A 21.40L gas cylinder has been filled with 3.186 moles of gas. You measure the pressure to be 3.260 atm . What is the temperature inside the tank
If 26.0 g of ammonia gas has a temperature of -6.70 C and a pressure of 535mmHg , what is its volume
Consider the directing effects of the substituents on salicylamide and predict the possible structures of the iodination products. Which do you think will be the major product? Explain your reasonin
Calculate the concentration of an pilocarpine solution with a pH = 9.34. The Kb of pilocarpine is 7.41x10-8 i need to know the steps to do problems like this one, if the steps can be simplified that
This provides an estimate of the equilibrium concentration of gasoline in contact with the plastic. What percent of the gasoline in the initially full 2 gallon container is lost in a year
what effect does the presence of sodium sulfite group on methyl orange have on the solubility of methyl orange in water
In an organic chemistry lab, why would you not simply oxidize p-toluidine with KMnO4 to make p-aminobenzoic acid if it would be a faster method than using multi-step organic synthesis
If the molecular mass of a gas increased by a factor of 4 at constant temperature, its rms speed will decrease by a factor of 2.
A sample of ammonia gas at 65.5°C and 524 torr has a volume of 15.31 L. What is its volume when the temperature is -15.8°C and its pressure is 524 torr
why does the addition of EDTA terminate a reaction in which a restriction enzyme cleaves DNA
Calculate the % ionization in a 0.3458 M solution of o-iodobenzoic acid. The Ka of o-iodobenzoic acid = 1.7 x 10-3.
What is the pH of a buffer that results when .50 mole of H3PO4 is mixed with .75 mole of NaOH and diluted with water to 1.00 L . The Ka1 is 7.5*10^-3, Ka2=6.2*10^-8 and Ka3*10^-13. Why is 6.2 *10^-8
What is the ground-state electron configuration of the fluoride ion F-? Express your answer in condensed form, in order of increasing orbital energy.
What is the pH of a buffer that results when .50 mole of H3PO4 is mixed with .25 mole of NaOH and diluted with water to 1.00 L The acid disassociation constants of phosphoric acid
How many grams of sucrose must be added to 320g of water to lower the vapor pressure by 1.5mm Hg at 25 degrees Celcius? The vaporpressure of water at 25 degrees Celcius is 23.8mmHg
Ethylene glycol,C2H4(OH)2, is a colorless liquid used as automobile antifreeze. If the density at 20 degree Celcius of a 4.028m solution of ethylene glycol in water is 1.0241g/mL, What is the molari