Tag Archives: MCAT

Getting Torqued

Water moves through a turbine in a dam, causing it to turn. The force of the water is 300 N, and the radius of the wheel is 20 m. What is the torque around the center of the wheel?

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Phase Changes

Which opposite Phase Changes occur at the same temperature for a pure substance?

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Endpoint of a Titration

Which of the following is NOT needed to calculate the endpoint of a titration?

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Mass of the Gas

The density of an unknown gas under STP conditions is 3.17 g.L-1. What is the molecular mass of the gas?

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The Complement System

Which of the following accurately describes the complement system?

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Recrystallization and You

Which statement below about recrystallization is NOT correct?

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The Gas Law

The following statement is a description of which Gas Law? “As a gas is heated under constant pressure its volume will increase in proportion to the change in temperature.”

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Otter Future

In a small lake, sea urchins graze upon small grasses that grow on the bottom. After the introduction of an exotic sea urchin, the small grasses became over grazed and absent. To solve the problem, a species of otter is introduced into the lake to predate upon the sea urchins, and the balance between the urchins and sea grasses is restored. What would be the appropriate term for the otter that was introduced?

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Electric Potential

Which of the following statements regarding electric current is true?

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I owe U a PAC Name

Provide the IUPAC name for the following compound:

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