WorksheetsChemistry Unit 1 Test
Total questions: 30
Worksheet time: 20mins
The study of the composition and properties of substance and the changes and reactions they undergo is called (a) .
Match the following scientific terms with their correct definitions.
Accuracy
The extent your answer agrees with the accepted value.
Matter
Anything that has mass and occupies space.
Energy
The ability to do work or cause change.
Chemistry
The study of substances, their properties, and reactions.
Precision
The extent to which repeated measurements under unchanged conditions show the same results.
Match the following scientific terms with their correct definitions.
Significant Digits
The numbers taken from a measuring device plus one additional estimated value.
Matter
Anything that has mass and occupies space.
Energy
The ability to do work or cause change.
Chemistry
The study of substances, their properties, and reactions.
Accuracy
The closeness of a measured value to the true value.
Match each branch of chemistry with its main focus or area of study.
Organic Chemistry
Study of carbon-containing compounds
Physical Chemistry
Study of physical properties and behavior of molecules
Analytical Chemistry
Analysis of substances to determine their composition
Biochemistry
Study of chemical processes in living organisms
Inorganic Chemistry
Study of inorganic compounds
What is the SI unit for temperature?
(a)
2.3 km = _?_ mm
(a)
450 mm = _?_ m
(a)
0.000 24 Gg = _?_ kg
(a)
1.3E6 cg = _?_ ng (answer must be in scientific notation)
(a)
42000 m = _?_ km
(a)
68 ns = _?_ s (answer must be in scientific notation)
(a)
0.038 Gs = _?_ s (answer must be in scientific notation)
(a)
14.8 kg = _?_ g
(a)
Calculate the percent yield of a reaction that had a theoretical yield of 3.76 g and an actual yield of 1.45 g.
(a)
An object has a mass of 35.0 grams. On Alice's balance, it weighs 34.85 grams. What is the percent error of her balance?
(a)
Jack uses his thermometer and finds the boiling point of ethyl alcohol to be 75°C. He looks in a reference book and finds that the known boiling point of ethyl alcohol is 80°C. What is his percent error?
(a)
How many significant digits are in 250?
(a)
How many significant digits are in 0.250?
(a)
How many significant digits are in 1,003,000?
(a)
How many significant digits are in 0.000238?
(a)
In the correct number of significant digits, what is 150 + 17
(a)
In the correct number of significant digits, what is
(1.25E6)x(4.0E8)
(a)
In the correct number of significant digits, what is
100/17
(a)
When adding 12.35 and 1.1, what is the correct result using significant figure rules?
(a)
In the correct number of significant digits, what is 135 x 17?
(a)
In the correct number of significant digits, what is
14 x 7.14
(a)
What is the result of 12.3 × 4.56 when properly rounded to the correct number of significant figures?
(a)
The attendance for the basketball game was estimated to be 15,000 people but 12,000 people attended. What was the percent error?
16.67%
25%
2500%
80%
Match each measured mass with its percent error (rounded to the nearest 0.1%) when compared to a 100 g standard mass.
1.5%
98.5g
0.5%
99.5g
2.5%
97.5g
0.15%
99.85
