How many moles of sugar, C12H22O11, are there in 200. grams?

A) 0.585 moles
B) 68,400 moles
C) 1.71 moles
D) 0.684 moles


Answer: A

Physics & Space Science

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Conservation of Momentum: A very elastic rubber ball is dropped from a certain height and hits the floor with a downward speed v. Since it is so elastic, the ball bounces back with the same speed v going upward. Which of the following statements about the bounce are correct? (There could be more than one correct choice.)

A. The ball had the same momentum just before and just after the bounce. B. The magnitude of the ball's momentum was the same just before and just after the bounce. C. The ball's momentum was conserved during the bounce. D. None of these statements are correct.

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In a circuit connected to a battery, the current flows from negative pole toward the positive pole of the battery

a. True b. False Indicate whether the statement is true or false

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A. decreases. B. stays the same. C. increases.

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The Early Bird communication satellite hovers over the same point on Earth's equator indefinitely, because

A) other forces than Earth's gravity act on it. B) it pulls as hard on Earth as Earth pulls on it. C) it is beyond the main pull of Earth gravity. D) it is kept aloft by ground control. E) its orbital period is 24 hours.

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