Topic 1 Review

Classifying Matter

Atoms in Chemical Reactions

Unique Properties of Water

Acids & Bases

The Law of Conservation of Mass

100

This pure substance cannot be broken down into simpler substances by chemical means because it consists of only one type of atom.

A) Compound

B) Element

C) Solution

D) Heterogeneous Mixture

B) Element

100

Located on the left side of a chemical equation, these are the starting substances before a chemical reaction occurs.

A) Products

B) Coefficients

C) Reactants

D) Subscripts

C) Reactants

100

This property describes water molecules sticking directly to other water molecules.

A) Adhesion

B) Cohesion

C) Solubility

D) Viscosity

B) Cohesion

100

Pure, neutral water has this exact value on the pH scale.

100

The Law of Conservation of Mass states that matter/mass cannot be ______________ or _________________ in a chemical reaction.

created

destroyed

200

Water (H₂O) and Table Salt (NaCl) belong to this category because two or more different elements are chemically bonded together.

A) Compound

B) Element

C) Mixture

D) Solution

A) Compound

200

In the chemical formula $2\text{H}_2\text{O}$, this specific number indicates that there are two total molecules of water.

A) Subscript

B) Coefficient

C) Atomic mass

D) Atomic number

B) Coefficient

200

This property allows water molecules to stick to different surfaces, such as water clinging to the glass of a graduated cylinder.

A) Evaporation

B) Cohesion

C) Surface Tension

D) Adhesion

200

Lemon juice, vinegar, and stomach acid all taste sour and fall into this category because their pH values are less than 7.

A) Bases

B) Salts

C) Neutrals

D) Acids

200

If 10 grams of Reactant A reacts completely with 15 grams of Reactant B in a closed container, this will be the total mass of the products.

25 grams

300

Trail mix, granite rock, and a salad are examples of this type of mixture where individual components are visibly separate and unevenly distributed.

A) Homogeneous Mixture

B) Element

C) Heterogeneous Mixture

D) Compound

C) Heterogeneous Mixture

300

In this equation for photosynthesis, how many atoms of O (oxygen) are in the products?

C₆H₁₂O₆ = 6 atoms

6 O₂ = 12 atoms

300

Thanks to cohesion creating an elastic-like "film" on top of water, water strider insects can "walk on water". What property of water makes this possible?

A) Erosion

B) Adhesion

C) Surface Tension

D) Evaporation

C) Surface Tension

300

Bleach, soap, and drain cleaner feel slippery and fall into this category because their pH values are greater than 7.

A) Acids

B) Neutrals

C) Bases

D) Elements

C) Bases

300

During a chemical reaction, mass stays the same because atoms are not lost or gained; they are simply doing this.

A) Destroyed

B) Rearranged

C) Converted into new elements

D) Shrinking in size

B) Rearranged

400

What does this picture represent?

A) Homogeneous Mixture

B) Compound

C) Heterogeneous Mixture

D) Element

B) Homogeneous Mixture

400

Small numbers placed after and below an element's symbol (like the '2' in CO₂) tell you this specific piece of information.

A) The number of molecules in the reaction

B) The number of atoms of that specific element

C) The mass of the element

D) The electrical charge of the element

B) The number of atoms of that specific element

400

Water moves upward against gravity from a plant's roots to its leaves through tiny tubes using adhesion and cohesion, a process known as this.

A) Capillary Action

B) Surface Tension

C) Thermal Expansion

D) Photosynthesis

A) Capillary Action

400

Acids taste...

A) Sour

B) Bitter

C) Sweet

D) Spicy

A) Sour

400

3 molecules of water (H₂O) would contain

How many atoms of Hydrogen?

How many atoms of Oxygen?

6 atoms of Hydrogen

3 atoms of Oxygen

500

What does this picture represent?

A) Homogeneous Mixture

B) Compound

C) Heterogeneous Mixture

D) Element

500

Name the elements present and how many of each element are in

NaHCO₃

Sodium = 1

Hydrogen = 1

Carbon = 1

Oxygen = 3

500

Rain droplets form tight, rounded spheres in the air rather than flattening out primarily due to this specific water property.

A) Adhesion

B) High Density

C) Surface Tension

D) Low Viscosity

C) Surface Tension

500

Bases taste...

A) Sour

B) Bitter

C) Sweet

D) Spicy

B) Bitter

500

How many grams of the reactant, O₂, were used in the reaction?

75 grams of O₂

_{130 + 65 = 195}

_{195 - 120 = 75}