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An animal cell assumes its normal volume when it is placed in a solution with a total electrolyte molarity of 0.3 M. If the cell is placed in a solution with a total molarity of 0.6 M, then what happens?
More water enters than leaves the cell, causing it to burst
More water leaves than enters the cell, causing it to shrink
The volume of the cell stays constant
No movement of water across the membranes takes place
The electrolyte molarity outside the cell cannot be higher than inside the cell
If the titration of a 25 mL sample of calcium hydroxide requires 34.45 mL of a 0.100 M HCl, what is the molarity of the base. 1. Determine the conjugate acid-base pairs in each of the following reactions:
The radius of a uranium atom is 149 pm. How many uranium atoms would have to be laid side by side to span a distance of 4.55 mm?
Which of the following is a statement of Hess's Law? Answer a. If a reaction is carried out in a series of steps, the ΔH for the reaction will equal the sum of the enthalpy changes for the individual steps
Consider the following reaction in a closed reaction flask. If 1.50 atm of gas A is allowed to react with 0.500 atm of gas B and the reaction goes to completion at constant temperature and volume, what is the total pressure in the reaction flask a..
Which of the following pairs of amino acids would carry a negative charge on their side chain at pH 8.0?
How much energy is needed to warm 0.500 g of silver from 25.0 degree C to 27.5 degree C? The specific heat of silver is 0.24J /g. degree C
The density of silver is 10.5 g/mL. What is the mass (in grams) of a piece of silver with a volume of 23.6 mL
The procedure instructs you to use a stir bar to mix the solution while adding NaOH. Descirbe any differences in the graph
A 388 mL container holds 0.146 g of Ne and an unknown amount of Ar at 35°C and a total pressure of 640. mmHg. Calculate the moles of Ar present.
The burning of a piece of paper in air (to produce CO2 and H2O vapor) is a spontanous reaction exothermic reaction. What would be necessary to start this reaction
A 147 gram piece of metal has a density of 7.00 g/mL. A 50 mL graduated cylinder contains 20.0vmL of water. What is the final volume after the metal is added to the graduated cylinder?
Element Z has two naturally occurring isotopes Z-79 ( 78.918 amu) and Z-81 (80.916 amu) . Calculate the atomic mass of element Z given the abundance of the Z-81 is 49.31 %
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