Chemistry Ch. 1 practice test

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The study of the processes that take place in organisms


Concerned with the mechanism, rate, and energy transfer that occurs when matter undergoes a change

physical chemistry

The study of all chemicals containing carbon

organic chemistry

The study of chemicals that, in general, do not contain carbon

inorganic chemistry

The study of the composition of matter

analytical chemistry

Closeness to true value


Narrowness of range of measurements


Known or estimated in a measurement

significant figures

The quantity of matter an object contains


The lowest point of the Kelvin scale

absolute zero

The SI scale for temperature

Kelvin temperature scale

The force of gravity on an object


The non-SI scale for temperature

Celsius temperature scale

Which field of science studies the composition and structure of matter?


The study of chemicals that, in general, do not contain carbon is traditionally called what type of chemistry?


Which of the following would a chemist be most likely to study?

a leaf changing color in autumn

Which of the following best describes an example of pure chemistry?

studying chemicals containing carbon

Which of the following statements is false?

Studying chemistry ensures that officials make correct choices in funding technology

Which of the following is NOT an example of chemistry research in the main area of energy?

producing hook-and-loop tape

Which of the following is an example of a current research focus in chemistry?

applying for gene therapy to treat certain diseases

Which of the following can be observed only in a microscopic view?

structure of a muscle cell

Which of the following was a major contribution to chemistry by Antonie Lavoisier?

he showed that oxygen is required for material to burn

One characteristic of a scientific theory is that ____.

it can never be proved

A theory is a ____.

well-tested explanation for a broad set of observations

Which step in the scientific method requires you to use your senses to obtain information?

making an observation

The variable that is observed during an experiment is called what type of variable?


Collaboration and communication are important in science because _____.

they increase likelihood of a successful outcome

Which of these steps should always be followed for effective problem solving?

developing a plan and them implementing the plan

The step that usually comes last in solving numeric problems is _____.


How do conceptual problems differ from numeric problems?

solutions to conceptual problems normally do not involve calculations

The diameter of a carbon atom is 0.000 000 000 154m. What is this number expressed in scientific notation?

1.54 x 10^-10m

The expression of 5008 km in scientific notation is _____.

5.008 x 10^3 km

What i the result of multiplying 2.5 x 10^10 by 3.5 x 10^-7?

8.75 x 10^3

What is the result of adding 2.5 x 10^3 and 3.5 x 10^2?

2.9 x 10^3

The closeness of a measurements to its true value is a measure of its _____.


Which of the following measurements contains two significant figures?

0.000 44 L

When a test instrument is calibrated, does its accuracy, precision, or reliability improve?


Which of the following measurements (of different masses) is the most accurate?

3.000 000 g

Which group of measurements is the most precise? (Each group of measurements is for a different object.)

2 g, 2.5 g, 3 g

3 different people weight a standard mass of 2.00 g on the same balance. Each person obtains a reading of 7.32 g for the mass of the standard. These results imply that the balance that was used is _____.


Which of the following measurements is expressed in 3 significant figures?

7.30 x 10^-7 km

In the measurement 0.503 L, which digit is the estimated digit?


How many significant figures are in the measurement 0.003 4 kg?


How many significant figures are in the measurement 40, 500 mg?


How many significant figures are in the measurement 811.40 grams?


Express the sum 1111 km and 222 km using the correct number of significant digits.

1333 km

Express the sum of 7.68 m and 5.0 m using the correct number of significant digits.

12.7 m

Express the product 2.2 mm and 5.00 mm using the correct number of significant digits.

11 mm^2

What is the measurement 111.009 mm rounded off to four significant digits?

111. 0 mm

What is the measurement 1042 L rounded off to two significant digits?

1.0 x 10^3 L

Express the product of 4.0 x 10^-2 m and 8.1 x 10^2 m using the correct number of significant digits.

3.2 x 10^1

When multiplying and dividing measured quantities, the number of significant figures in the result should be equal to the number of significant figures in ____.

the least precise measurement

What is the volume of a salt crystal measuring 2.44 x 10^-2 m by 1.4 x 10^-3 m by 8.4 x 10^-3 m?

2.9 x 10^-7 m^3

What quantity is represented by the metric system prefix deci-?


What metric system prefix for the quantity 0.000 001?


The chief advantage of the metric system over the other systems of measurement is that it _____.

is in multiples of 10

Which of the following units is NOT an official SI unit?


Which of the following volumes is the smallest?

one microliter

What is the SI unit of mass?


What is the temperature of absolute zero measured in Celsius?

-273 degrees Celsius

Which temperature scale has no negative temperature?


What is the boiling point of water in kelvins?

373 K

Which of the following mass units is largest?

1 dg

The weight of an object _______.

depends on its location

What is the temperature -34 degrees Celsius expressed in kelvins?

239 K

If the temperature changes by 100 K, by how much it does it change in degrees Celsius?

100 degrees Celsius

Chlorine boils at 239 K. What is the boiling point of chlorine expressed in degrees Celsius?

-34 degrees Celsius

What is the quantity 0.0075 meters expressed in centimeters?

0.75 cm

A train travels at a speed of 30 miles per hour. If 1 mile= 1.6 kilometers, how fast is the train traveling in kilometers per minute?

0.8 km/ min

The density of mercury is 5, 427 kg/ (m^3). If the density of water is 1.0 g/mL, will mercury float or sink in water?

Mercury will sink because the density of Mercury is 0.05427 g/mL, which is greater than the 1.0 g/mL density of water.

Which of the following equalities is NOT correct?

10kg = 1g

A cubic meter is about the same as the volume occupied by a ____.

washing machine

The quantity 44 liters expressed in cubic meters is ___.

0.044 m^3

Density is found by dividing ____.

mass by volume

What is the density of an object having a mass of 8.0 g and a volume of 25 cm^3?

0.32 g/cm^3

What is the volume of 80.0 g of ether if the density of ether is 0.70 g/mL?

1.1 x 10^2

What is the volume of 45.6 g of silver if the density of silver is 10.5 g/mL?

4.34 mL

If a liter of water is heated from 20 degrees Celsius to 50 degrees Celsius, what happens to its volume?

The volume increases

If the temperature of a piece of steel decreases, what happens to its density?

The density increases

As the density of a substance increases, the volume of a given mass of that substance ____.


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