Question 1

How many significant digits are in the length measurement 61,000 cm?

Accepted Answer

A)  2
B)  3
C)  4
D)  5
E)  none of the above

Question 2

How many significant digits are in the length measurement 100.60 cm?

Accepted Answer

A)  1
B)  2
C)  3
D)  4
E)  none of the above

Question 3

Ten milliliters of neon gas contains 269,000,000,000,000,000,000 atoms at normal temperature and pressure.Express the number of atoms in scientific notation.

Accepted Answer

A)  2.69 x 1018
B)  2.69 x 1019
C)  2.69 x 1020
D)  269 x 1018
E)  269 x 1019

Question 4

Express the exponential number 5.55 x 10-3 as an ordinary number.

Accepted Answer

A)  0.005 55
B)  0.000 555
C)  5,550
D)  55,500
E)  none of the above

Question 5

What is the term for a numerical value and unit that expresses a mass,length,or volume?

Accepted Answer

A)  assessment
B)  estimation
C)  measurement
D)  quantity
E)  none of the above

Question 6

Add 2.4 x 10-3 to 3.7 x 10-2 and express the answer in scientific notation.

Accepted Answer

A)  3.9 x 10-2
B)  3.9 x 10-3
C)  3.9 x 10-4
D)  3.9 x 102
E)  3.9 x 103

Question 7

A sodium atom has a radius of 0.000 000 018 6 cm.Express the atomic radius in scientific notation.

Accepted Answer

A)  1.86 x 10-9 cm
B)  1.86 x 10-8 cm
C)  1.86 x 10-7 cm
D)  1.86 x 107 cm
E)  1.86 x 108 cm

Question 8

One gram of silver contains 5,580,000,000,000,000,000,000 atoms.Express the number of silver atoms in scientific notation.

Accepted Answer

A)  5.58 x 1020
B)  5.58 x 1021
C)  5.58 x 1022
D)  55.8 x 1020
E)  55.8 x 1021

Question 9

How many significant digits are in the mass measurement 1.050 g?

Accepted Answer

A)  1
B)  2
C)  3
D)  4
E)  none of the above

Question 10

Which of the following instruments provides an exact measurement?

Accepted Answer

A)  millimeter ruler
B)  milligram balance
C)  milliliter pipet
D)  all of the above
E)  none of the above

Question 11

Convert 155 x 10-5 to scientific notation.

Accepted Answer

A)  1.55 x 10-7
B)  1.55 x 10-6
C)  1.55 x 10-5
D)  1.55 x 10-4
E)  1.55 x 10-3

Question 12

Add 7.77 g to 11.666 g and round off the answer.

Accepted Answer

A)  19.0 g
B)  19.4 g
C)  19.43 g
D)  19.44 g
E)  19.436 g

Question 13

Which of the following terms is a metric unit of mass?

Accepted Answer

A)  centimeter
B)  gram
C)  milliliter
D)  second
E)  none of the above

Question 14

How many significant digits are in the length measurement 10.01 cm?

Accepted Answer

A)  1
B)  2
C)  3
D)  4
E)  none of the above

Question 15

Divide 28.82 g by 14.5 mL and round off the answer.

Accepted Answer

A)  1.97 g/mL
B)  1.98 g/mL
C)  1.99 g/mL
D)  1.987 g/mL
E)  1.988 g/mL

Question 16

A mercury atom has a mass of 0.000 000 000 000 000 000 000 333 g.Express the mass in scientific notation.

Accepted Answer

A)  3.33 x 1022 g
B)  3.33 x 1021 g
C)  3.33 x 10-21 g
D)  3.33 x 10-22 g
E)  3.33 x 10-23 g

Question 17

One liter of argon gas contains 26,900,000,000,000,000,000,000 atoms at normal temperature and pressure.Express the number of atoms in scientific notation.

Accepted Answer

A)  2.69 x 1020
B)  2.69 x 1021
C)  2.69 x 1022
D)  26.9 x 1021
E)  26.9 x 1022

Question 18

One gram of carbon contains 50,200,000,000,000,000,000,000 atoms.Express the number of carbon atoms in scientific notation.

Accepted Answer

A)  5.02 x 1021
B)  5.02 x 1022
C)  5.02 x 1023
D)  50.2 x 1021
E)  50.2 x 1022

Question 19

How many significant digits are in the volume measurement 4040.0 mL?

Accepted Answer

A)  2
B)  3
C)  4
D)  5
E)  none of the above

Question 20

Express 1,000,000,000,000,000,000,000,000,000 as an exponential number.

Accepted Answer

A)  1 x 10-27
B)  1 x 10-26
C)  1 x 1027
D)  1 x 1028
E)  none of the above

Exam 21: Interlude: Prerequisite Science Skills

Express 1,000,000,000,000,000,000,000,000,000 as an exponential number.

Correct AnswerverifiedShow Answer

Express the exponential number 5.55 x 10-3 as an ordinary number.

Correct AnswerverifiedShow Answer

Which of the following instruments provides an exact measurement?

Correct AnswerverifiedShow Answer

Add 7.77 g to 11.666 g and round off the answer.

Correct AnswerverifiedShow Answer

How many significant digits are in the mass measurement 1.050 g?

Correct AnswerverifiedShow Answer

Ten milliliters of neon gas contains 269,000,000,000,000,000,000 atoms at normal temperature and pressure.Express the number of atoms in scientific notation.

Correct AnswerverifiedShow Answer

Convert 155 x 10-5 to scientific notation.

Correct AnswerverifiedShow Answer

What is the term for a numerical value and unit that expresses a mass,length,or volume?

Correct AnswerverifiedShow Answer

How many significant digits are in the length measurement 100.60 cm?

Correct AnswerverifiedShow Answer

A mercury atom has a mass of 0.000 000 000 000 000 000 000 333 g.Express the mass in scientific notation.

Correct AnswerverifiedShow Answer

Which of the following terms is a metric unit of mass?

Correct AnswerverifiedShow Answer

One gram of carbon contains 50,200,000,000,000,000,000,000 atoms.Express the number of carbon atoms in scientific notation.

Correct AnswerverifiedShow Answer

Divide 28.82 g by 14.5 mL and round off the answer.

Correct AnswerverifiedShow Answer

How many significant digits are in the length measurement 10.01 cm?

Correct AnswerverifiedShow Answer

How many significant digits are in the volume measurement 4040.0 mL?

Correct AnswerverifiedShow Answer

One gram of silver contains 5,580,000,000,000,000,000,000 atoms.Express the number of silver atoms in scientific notation.

Correct AnswerverifiedShow Answer

A sodium atom has a radius of 0.000 000 018 6 cm.Express the atomic radius in scientific notation.

Correct AnswerverifiedShow Answer

How many significant digits are in the length measurement 61,000 cm?

Correct AnswerverifiedShow Answer

One liter of argon gas contains 26,900,000,000,000,000,000,000 atoms at normal temperature and pressure.Express the number of atoms in scientific notation.

Correct AnswerverifiedShow Answer

Add 2.4 x 10-3 to 3.7 x 10-2 and express the answer in scientific notation.

Correct AnswerverifiedShow Answer

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