WorksheetsIntroduction to Chemistry
Total questions: 26
Worksheet time: 13mins
Which of the following is an example of a qualitative observation?
The shirt is red.
The shirt has a mass of 15 grams.
The shirt is 72 cm long.
The shirt is ugly.
Using the graduated cylinder to the right, select the most accurate AND precise measurement.
A. 22 mL
B. 20 mL
C. 22.0 mL
D. 20.0 mL
How many significant figures are in the measurement 760 mmHg?
0
1
2
3
How many significant figures are in the measurement 0.0103 mL?
A. 2
B. 3
C. 4
D. 5
A solution where the solvent is water is known as a(n) ________.
aqueous solution
alloy
solute
substance
A property of matter that depends on the amount of matter present would be considered a(n) ________ property.
A. physical
B. chemical
C. intensive
D. extensive
Micah tells his mom he can’t go to school today to take his chemistry test because he is running a temperature of 310.2 K. What is his temperature in degrees Fahrenheit?
-11.4 °F
2.81 °F
37.1 °F
98.7 °F
Matter with an indefinite shape but a definite volume would be considered a ________.
A. solid
B. liquid
C. gas
D. plasma
Using the data table to the right, determine the identity of a cube of metal that has a volume of 1.73 cm³ and a mass of 33.3 grams.
A. Gold
B. Nickel
C. Silver
D. Zinc
Which of the following is not an example of a physical change?
A. Cutting a piece of string in half.
B. Freezing water into an ice cube.
C. Crumpling a piece of paper into a ball.
D. Letting the food in your lunch box rot in your locker.
You are given a container filled with clumps of iron and sand. You can separate the iron from the sand using a magnet. This makes this a ________.
A. homogeneous mixture
B. compound
C. heterogeneous mixture
D. solution
Which of the following measurements would be considered the smallest?
10,000 ug
1,000 hg
100 cg
10 g
You are conducting an experiment and find the volume of a substance to be 9.85 mL. If the known volume of the substance is 10.25 mL, find the percentage error in your measurement.
-3.90%
-4.06%
3.90%
4.06%
How many significant figures are in the speed of light, 3.0x108 m/s?
0
2
5
8
Which of the following is not a sign that a chemical reaction may have occurred?
Sudden color change from clear to yellow
Changing state from liquid to gas
The formation of a precipitate
Giving off heat
Calcium chloride has a density of 2.50 g/cm³. If you have 218 g of it, what volume do you have?
87.2 cm³
545 cm³
87.2 g
545 g
Which of the following statements about a chemical change is true?
A. A chemical change results in a change in energy AND a change in the amount of matter.
B. A chemical change results in a change in energy but not a change in the amount of matter.
C. A chemical change results in a change in the amount of matter but not a change in energy.
D. A chemical change results in neither a change in energy OR a change in the amount of matter.
Measure the length of the line using the ruler below. What is the length of the line?
5 cm
7 cm
10 cm
3 cm
Which of the following best outlines how biochemistry students should set up their investigation to achieve the most precise and accurate results, including identification of experimental and control groups and at least two constants?
Clearly define experimental and control groups, keep temperature and pH constant, and use the same equipment for all samples.
Change all variables between groups to see different results.
Only use one group and change all conditions for each trial.
Ignore constants and focus only on the results of the experimental group.
Both control groups and constants play important roles in designing an experiment. What is their main purpose?
They help ensure that the results are due to the variable being tested and not other factors.
They increase the number of variables in the experiment.
They make the experiment more complicated.
They guarantee that the hypothesis is correct.
Write the following numbers in scientific notation: a. 78,700,000,000
7.87 × 10¹⁰
7.87 × 10⁹
7.87 × 10⁸
78.7 × 10⁹
Write the following numbers in scientific notation: b. 0.0099
9.9 × 10⁻³
9.9 × 10³
0.99 × 10⁻³
99 × 10⁻⁴
Write the following numbers in standard notation: a. 5.01x102 b. 3.102x106
a. 501 b. 3,102,000
a. 50.1 b. 31,020
a. 5,010 b. 310,200
a. 0.501 b. 0.003102
30. The marble in the figure to the right has a mass of 3.75 g. When placed in a graduated cylinder the water level changes, as pictured. Assume the graduated cylinder is measuring in mL. If water has a density of 0.997 g/mL, will the marble float or not in the graduated cylinder? Justify your answer with evidence and reasoning.
The marble will sink because its density is greater than that of water.
The marble will float because its density is less than that of water.
The marble will float because its density is equal to that of water.
The marble will neither float nor sink because its density is the same as water.
Write a sentence using the terms atom, element, and compound to describe propane, which has the following chemical formula: C3H8.
Propane is a compound made of the elements carbon and hydrogen, which are made up of atoms.
Propane is an element made of the compounds carbon and hydrogen, which are made up of atoms.
Propane is a compound made of the atoms carbon and hydrogen, which are made up of elements.
Propane is an atom made of the elements carbon and hydrogen, which are made up of compounds.
Differentiate between a compound and a mixture.
A compound is a substance made of two or more elements chemically bonded together, while a mixture is a combination of substances that are not chemically bonded.
A compound is a mixture of two or more substances that can be separated by physical means, while a mixture is a pure substance.
A compound is always a solid, while a mixture is always a liquid.
A compound contains only one type of atom, while a mixture contains only one type of molecule.
