Chapter 1: Q. 1.31 (page 22)
A "chemical-free" shampoo includes the following ingredients: water, cocamide, glycerin, and citric acid. Is the shampoo truly "chemical-free"?
The shampoo is not truly "chemical-free" .
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Identify each of the following as an observation, a hypothesis, an experiment, or a conclusion:
a. Every spring, you have congestion and a runny nose.
b. An overweight patient decides to exercise more to lose weight
c. Many research studies have linked obesity to heart disease.
A container was found in the home of the victim that contained of ethylene glycol in of liquid. What was the percentage of ethylene glycol? Express your answer to the ones place.
A student in your class asks you for advice on learning chemistry. Which of the following might you suggest?
a. studying different topics at the same time
b. not reading the text; it's never on the test
c. attending review sessions
d. working on the problems again after a few days
e. keeping a problem notebook.
Write each of the following in scientific notation:
a.
b.
C.
d.
What is the place value for the bold digit?
a.
b.
c.role="math" localid="1651733426370"
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