Name: ___________________________
Due Date: _________________
Score____________/_____
HW3 – Conversions & Measurement
Review: Determine the answer to these calculations using the proper number of significant figures.
_________________1) (35.72 m) (0.00590 m) =
_________________3) 8.00 g / 2.000 mL =
_______________2) 14.05 cm + 5.231 cm + 15.0 cm =
4) Using two different instruments, I measured the length of my binder to be 27 cm and 27.00 cm. Explain the
difference between these two measurements.
__________________________________________________________________________________________________
__________________________________________________________________________________________________
__________________________________________________________________________________________________
Perform the following unit conversions. You MUST USE UNIT ANALYSIS to receive full credit. Be sure to observe the
correct number of significant figures in your answer.
_________________5) Convert 7.00 in to cm
_________________6) Convert 416 hr to weeks
_________________7) Convert 46200 mm to km
_________________8) You ran 3.000 miles one day after school. How many feet did you run?
_________________9) Convert 7.89 cm to ft
_________________10) Your yard is 1,200. feet long. How many to meters long is it?
_________________11) Convert 55,000 sec to days
12) Your mom needs you to go to the store to buy ribbon to wrap around your brother’s birthday gift. She says
you need to purchase at least 5 yards. The only ribbon at the store is sold in centimeters. If you buy a spool
that has 300. cm of ribbon, will it be enough? Briefly explain.
Answer: ___________________________________________________________________________________________
Put in scientific notation:
13) 504,000 cm ____________________
14) 0.040 L ____________________
15) 0.003079 km ____________________
16) 1,405,000,000 sec ____________________
Take out of scientific notation:
17) 5.12 × 10-3 km = _________________
19) 8.6 x 105 sec = _________________
18) 4.20 × 104 mL = _________________
20) 3.0 x 10-4 kg = _________________
21-23) Measure the following using the correct number of significant figures.
A) _____________cm
B) _______________mL
C) _____________mL
24) Ginny put some pennies in a dish. She weighed the dish beforehand and it was 67.39g. After she added the
pennies, the mass was 78.12g.
What is the mass of the pennies?_____________________
25) Circle the estimated digit in each measurement:
54.39
31.571
70.0
500
26-29) What is the best instrument for measuring the following volumes?
Choose from:
250 mL Erlenmeyer flask,
test tube, 1000 mL beaker
500 mL beaker,
10 mL graduated cylinder,
50 mL graduated cylinder,
A) 5.4 mL _______________________
C) 450 mL _______________________
B) 175 mL _______________________
D) 40 mL _______________________
Honors Only: Perform the following conversions. Show your work.
___________________ = Convert 75.0 in3 to liters
Find area of rectangle:___________________
Convert to m2:____________________
4.6 cm
9.1 cm
Convert to mm2:____________________
For the rectangular solid:
Find volume:________________
Convert to mm3:_________________
L = 14.2 cm
W = 8.6 cm
H = 21.5 cm