2016 SCH3U Introduction to Chemistry Quiz
.
Name________________
Date_________________
1. Determine the number of significant digits in the following: (3)
a. 40000g
____________
71
b. 1.0000 x10 ____________
c. 0.000022
____________
2. Complete the following:
(3)
a. 30.5 g - 101.1 g =
_________
b. 5.000g + 24 g=
_________
3.
4.
5.
6.
7.
c. 64g
0.21 =
_________
Convert each to scientific notation: (3)
a. 0.100024
___________
b. 1000.00
___________
c. 45 00000
___________
Convert each into decimal form: (3)
a. 2.7 x10 -6
___________
4
b. 7.99 x10
___________
1
c. 95 x10
___________
Convert the following into percent uncertainties. Round your answer to one sig dig.(2)
a. 2.70 0.05 cm = ___________
b. 11.02 0.8 cm =___________
Convert the following into absolute uncertainties: (2)
a. 13.7  6% =____________
b. 25 s  20% = ____________
Calculate the answer with the absolute uncertainty: (4)
a. (32.0  0.1 mL ) +(10.0  0.5mL) =
b. (5.2  0.1 m) x (10.2  0.5m) =
8. Explain what is meant by the following terms when applied to scientific measurements
a. Precise (2)
b. Accurate (1)
9. For each of the following diagrams express the reading showing the quantity and uncertainty. (6)
10. Label each piece of laboratory equipment pictured below(4)