QUESTION 1

CCONVERT 45 m/s = __________ km/hr

A) 2.7

B) 0.045

C) 1.6 102

D) 2.7 103

QUESTION 2

Round the number 0.007224 to three significant figures.

A) 0.007

B) 0.00722

C) 0.0072

D) 0.00723

QUESTION 3

The correct number of Sig Fig, forthe following operation( multiply then divide) is:

0.025 x 4.620 / 3.44 =

	A.	0.0335756
	B.	0.0336
	C.	0.034
	D.	0.033

QUESTION 4

A substance composed of 2 or more elements in a fixed ,definite composition is considered

		a solution
		an alloy
		a homogeneous mixture
		a heterogeneous mixture
		a compound

QUESTION 5

The correct answer (reported to the proper number of significant figures) to the following is __________.

6.3 3.25 = _____

A) 20.

B) 20.475

C) 20.48

D) 20.5