CR Chapter 7: Numbers in Chemistry

CR Chapter 7: Numbers in Chemistry

10th Grade

32 Qs

quiz-placeholder

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CR Chapter 7: Numbers in Chemistry

CR Chapter 7: Numbers in Chemistry

Assessment

Quiz

Chemistry

10th Grade

Medium

Created by

Jess Spicer

Used 16+ times

FREE Resource

32 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Convert 32,000. into scientific notation.

32.000 x 103

3.2000 x 104

32000 x 102

0.32000 x 10-2

Answer explanation

To convert 32,000. into scientific notation, move the decimal point to the left until there is only one non-zero digit to the left. The number of times the decimal was moved is the exponent and it is positive because 32,000. is a large quantity. The correct choice is 3.2000 x 104.

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Convert 6.02x102 to standard notation

6.02

60.2

602

0.602

Answer explanation

To convert 6.02x102 to standard notation, move the decimal point two places to the right to make the number represent a large quantity. The correct choice is 602.

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

How many Sig Figs are in 0.00025?

1

2

3

4

Answer explanation

Media Image

There are 2 significant figures in 0.00025 because all non-zero digits and zeros between them are significant. Leading zeros are not counted as a significant figure.

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Round 5.235874 to 3 Sig Figs

5.23

5.235

5.236

5.24

Answer explanation

To round 5.235874 to 3 significant figures, we look at the digit after the third significant figure. Since it is 8, we round up the last significant figure. Therefore, the correct answer is 5.24.

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

How many Sig Figs are in 25.00?

1

2

3

4

Answer explanation

Media Image

There are 4 significant figures in 25.00 because all the non-zero digits are significant and zeros at the end with a decimal point are also significant.

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

This bullseye demonstrates...

High Accuracy & High Precision

High Accuracy & Low Precision

Low Accuracy & High Precision

Low Accuracy & Low Precision

Answer explanation

This bullseye demonstrates low accuracy and high precision, as it consistently hits the same spot but not the target center.

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

What conversion factor would be best for this problem?

1 kg / 2.2 lbs

2.2 lb / 1 kg

1000 g / 1 kg

1 kg / 1000 g

Answer explanation

Media Image

The best conversion factor for this problem is 2.2 lb / 1 kg because it correctly places kg in the denominator to cancel it and places lb in the numerator to convert to it.

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