How many constitutional isomers that are dibromopropanes exist?

a. 5
b. 4
c. 7
d. 3
e. 6

b

Physics & Space Science

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A ball of mass mB is released from rest and acquires velocity of magnitude vB before hitting the ground. The ratio of the magnitude of the momentum the Earth acquires to the magnitude of the momentum the ball acquires is

A.

0.

B.
.

C.
.

D.
1

E.
.

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Physics & Space Science

Which one of the choices below represents the preferred practice regarding significant figures when multiplying the following: 15.0 × 5.6 × 2.33?

a. 200 b. 195.720 c. 195.72 d. 195.7 e. 196

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The atmosphere of Titan is chiefly

A) ammonia. B) nitrogen. C) oxygen. D) methane. E) hydrogen.

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Are comets common? Explain why or why not

What will be an ideal response?

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Physics & Space Science