01 Oct Which of the following is a proper measurement?
CHEM1305 Introductory Chemistry
Chapter 2 Homework Assignment
Question 1Which of the following is a proper measurement?
12
yard stick
50 meters
dozen
Question 2Give the number of significant figures in each:
a) 6000 mL
1
b) 0.02508 cm
4
c) 94.2 g
3
d) 1,001 in
Question 3What is the number 0.000583 in scientific notation format?
5.83 × 10-4
5.83 × 104
5.83 × 10-3
5.83
Question 4What is the number 7.9 × 108 written as an ordinary number?
790,000
0.000000079
790,000,000
7,900,000,000
Question 5Complete the calculation and choose the answer using the correct number of significant figures:
5.007 m × 6 m
30.042 m2
30.04 m2
30 m2
30 m
Question 6Complete the calculation and choose the answer using the correct number of significant figures:
17.75 g + 21 g
39 g
38.8 g
38.75 g
38.75 g2
Question 7Choose the correct abbreviation for the unit “milliliter” and define in terms of the base unit.
mil; 100 mil = 1 l
ML; 1 ML = 1,000,000 L
mL; 1000 mL = 1 L
μL; 1,000,000 μL = 1 L
Question 8Convert 651,000 m to km, given 1000 m = 1 km
65.1 km
6.51 km
651,000,000 km
651 km
Question 9Convert 135 lb to kg, given 1 lb = 454 g; 1000 g = 1 kg
3.36 kg
61.3 kg
0.000297 kg
297 kg
Question 10What is the density of oxygen, given that a 2.00 L sample of oxygen has a mass of 2.86 g?
5.72 g/L
1.43 g/mL
0.699 g/L
1.43 g/L
