Chemistry 1st Quarter Review: Eve

Drag and Drop

In the lab, you should always wear​

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for your eyes, ​

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hair, never ​

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anything in a lab, wear​

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to protect your feet, and never conduct any ​

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experiments.

Drag these tiles and drop them in the correct blank above

safety goggles

restrain

eat

closed toed shoes

unapproved

Drag and Drop

​

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, making ​

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from water, and ​

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zinc into acid are examples of ​

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changes of matter.

Drag these tiles and drop them in the correct blank above

Burning gasoline

dissolving

chemical

hydrogen

​A homogeneous material has a uniform composition and appearance. Individual substances that constitute a homogeneous mixture cannot be visually differentiated.
A heterogeneous material is made of two or more substances that can be distinctly observed, and even separated relatively easily. (like taking tomatoes out of a salad or raisins out of raisin bran.)

Multiple Choice

Which of the following is NOT homogenous?

• air

• dirt

• fresh, black hot coffee

• all of these are homogenous

Multiple Choice

Why is raisin bran considered heterogenous?

• It contains sugar

• It has two or more substances that can be distinctly observed and even separated from the mixture

• It has a uniform composition and appearance.

• It cannot be visually differentiated

Multiple Select

Which of the following are heterogenous?

• sausage and mushroom pizza

• wood

• dirt

• lucky charms

• air

Categorize

Options (12)

oxygen

silver

iron

water

carbon dioxide

sugar

air

Big Mac

seawater

chocolate sundae

ice

hydrogen

Organize these options into the right categories!

elements

compounds

mixtures

Categorize

Options (8)

color

density

boils at 450

burns easily

not affected by acids

reacts violently with chlorine

good conductivity

high ph

Organize these options into the right categories

physical properties

chemical properties

Physical Properties

• do not change the chemical nature of the matter.

• readily observable

• help understand how the substance will behave under various conditions

Examples of physical properties:

• magnetism

• boiling and freezing and melting point

• malleability

• measurable qualities: density, mass, and volume

• viscosity

• size and shape and color

• texture

Chemical Properties

change the chemical nature of matter and are only seen during a chemical reaction

Examples of Chemical Properties

• combustibility (the energy released when it burns completely)

• reactivity (reacting with other chemicals- may form a precipitate or color change)

• Ph (measure of acidity or alkalinity of a solution)

• flammability (how likely to burn)

Multiple Choice

Physical or chemical?

• Physical

• Chemical

Multiple Choice

Physical or chemical?

• Physical

• Chemical

Multiple Choice

Physical or chemical?

• Physical

• Chemical

Multiple Choice

Physical or chemical?

• Physical

• Chemical

Multiple Choice

Physical or chemical?

• Chemical

• Physical

Multiple Choice

Physical or Chemical?

• Physical

• Chemical

Multiple Choice

Physical or chemical?

• Physical

• Chemical

Multiple Choice

Physical or chemical?

• Physical

• Chemical

Physical Properties of Matter

Intensive

Extensive

​

Multiple Choice

Name an extensive property

• Color

• Mass

• Odor

• Luster

Multiple Choice

Name an intensive property

• Size

• Boiling point

• Height

• Weight

Multiple Choice

What is the definition of intensive property?

• Properties that vary depending on the amount of matter

• Properties that do not change with amount of matter

Match

Match the following Physical properties

• The length of your hair

• The color of your hair

• The size shoe you wear

• Your smelly feet

Your hair's extensive Property

Your hair's intensive Property

Your feet's extensive Property

Your feet's intensive Property

• Your hair's extensive Property

• Your hair's intensive Property

• Your feet's extensive Property

• Your feet's intensive Property

Multiple Choice

Which is one is the variable that you change in an experiment?

• Independent

• Dependent

• Constant

• Control

Multiple Choice

Which variable is what changes because of what you manipulated in the experiment?

• Independent

• Dependent

• Constant

• Control

Multiple Choice

Mixtures are __________ combined.

• Chemically
• Physically
• Magically
• Spontaneously

Multiple Choice

What is CO2 an example of?

• element
• mixture
• compound

Multiple Choice

Contains only one kind of atom.

• Element
• Compund
• Mixture

Multiple Choice

Contains two or more atoms combined

• Elements
• Compounds
• Mixtures

Multiple Choice

The air is a _________. 

• element 
• mixture 
• compound 
• energy 

Multiple Choice

Elements can be broken down into simpler substances. 

• false 
• true 
• sometimes 

Multiple Choice

Examples are diamonds (C) and Uranium (U)

• elements

• mixtures

• compounds

Multiple Choice

Is sugar (C₁₂H₂₂O₁₁) an element or a compound?

• Element
• Compound

Multiple Choice

What is H₂SO₄ 
 made up of?

• 2 hydrogen, 1 sulfur, 4 oxygen
• 1 hydrogen, 2 sulfur, 4 oxygen
• 2 hydrogen & 4 sodium
• 1 hydrogen & 6 sodium

Multiple Choice

An element is made up of only one kind of _____.

• isotope
• plastic
• atom
• metal

Multiple Choice

What is salad?

• element
• compound
• mixture

All compounds are molecules, but not all molecules are compounds.

​

Elements are molecules too, but they are made up of more than one of the SAME ATOM.

​PUT THIS DIAGRAM IN YOUR NOTES!!! USE COLORED PENCILS!

Multiple Choice

All ____________ are made up of two or more atoms bonded together.

• atoms
• molecules
• electrons
• elements

Multiple Choice

When __________ form, the elements lose their individual chemical properties and take on new properties.

• compounds
• atoms
• subscript
• formula

Multiple Choice

If the exponent on the power of 10 is a positive number...

• you will get a large number that is greater than 1

• you will get a smaller number that is less than 1

Multiple Choice

Which of the following numbers is written in correct scientific notation?

• $$64.2\cdot10^2$$  

• $$6.42\cdot10^3$$  

• $$0.642\cdot10^4$$  

• $$6240$$  

Multiple Choice

Which of these numbers is the smallest?

• 3.5 x10⁷

• 3 x10⁸

• 5 x10⁷

• 5.5 x10⁶

Multiple Choice

Which of these numbers is the greatest?

• 9 x 10⁹

• 8.1 x10¹⁰

• 9.02 x10⁹

• 6.35 x10¹⁰

Multiple Choice

How is the following number written in scientific notation?

450,000

• 4.5  x  10⁵

• 45  x  10⁵

• 4.5  x  10⁴

• 4.5  x  10⁶

Multiple Choice

How is the number below written in scientific notation?

0.000398

• 39.8  x  10^-5

• 3.98  x  10^-5

• 3.98  x  10^-4

• 39.8  x  10^-6

Multiple Choice

Which of the following is the correct way to write 3.97  x  10^-2 in standard form?

• 0.000397

• 0.0397

• 0.0000397

• 0.397

Multiple Choice

Express the following in scientific notation:
.000457

• 457 x 10⁶
• 457 x 10^-6
• 4.57 x10⁴
• 4.57 x 10^-4

Multiple Choice

Which of the following is correct scientific notation?

• 20.35 x 10⁴
• .2035 x 10⁴
• 2035 ⁴
• 2.035 x10⁴

Multiple Choice

Convert to scientific notation:

520,000,000

• 52 x 10⁷

• 5.2 x 10^-7

• 5.2 x 10⁸

• 0.52 x 10⁹

Which digits are significant?

All nonzero digits are significant.

247.542

200

57000

Zeros between nonzero digits are significant.

4092.502

200.009

Multiple Choice

Which digits are significant?

10.512

• 10.512

• 10.512

• 10.512

• 10.512

Multiple Choice

Which zeros are significant?

403.2709

• 403.2709

• 403.2709

• 403.2709

• 403.2709

Which digits are significant?

When a decimal is present, trailing zeros are significant.

200.0

70.

350.400

0.08300

Multiple Choice

Which digits are significant?

482.3600

• 482.3600

• 482.3600

• 482.3600

• 482.3600

Multiple Choice

Which digits are significant?

36000.

• 36000.

• 36000.

• 36000.

• 36000.

Which digits are not significant?

When there is no decimal, trailing zeros are not significant.

50

3200

408000

Leading zeros are never significant.

0.000247

.06

0.00830

Multiple Choice

Which digits are significant?

0.0039270

• 0.0039270

• 0.0039270

• 0.0039270

• 0.0039270

Multiple Choice

Which digits are significant?

79,000,000.000

• 79,000,000.000

• 79,000,000.000

• 79,000,000.000

• 79,000,000.000

Multiple Choice

Select the answer reported to the correct number of significant digits.

520 - 92.1

• 430

• 428

• 427.9

• 42

Multiple Choice

Select the answer reported to the correct number of significant digits.

2.34 - 0.053

• 2.287

• 2.28

• 2.29

• 2.3

Multiplying and Dividing

Keep the same number of significant figures as the measurement with the least significant figures.

42 X 207.2 = 8702.4

42 - 2 sig figs

207.2 4 sig figs

2 is less than 4, so keep 2 sig figs

8702.4 --> 8700

Multiple Choice

What is 78.5 rounded to one significant figure?

• 79

• 78.5

• 70

• 80

Multiple Choice

Round 0.010229 to four significant figures

• 1022

• 1023

• 0.01023

• 0.01022

Multiple Choice

What is 0.658 rounded to 1 significant figure?

• 0

• 0.66

• 0.7

• 0.658

Multiple Choice

How many significant figures does the following number have: 0.998005

• 9
• 10
• 6
• 5

Multiple Choice

How many significant figures does the following number have: 100.00210

• 7
• 5
• 10
• 8

Multiple Choice

How many significant figures does the following number have: 100.3

• 4
• 3
• 5
• 2