Final Exam Review-Part 2

Final Exam Review-Part 2

Multiple Choice

What rule refers to the tendency of atoms to prefer to have eight electrons in the valence shell?

• Law of Conservation

• Octet Rule

• Duet rule

• Avogadro's Law

Multiple Choice

One pair of electrons shared between two different atoms is forms a ________.

• Double bond

• Triple bond

• Single bond

Multiple Choice

Two pairs of electrons shared between two different atoms is forms a ________.

• Double bond

• Triple bond

• Single bond

Multiple Choice

Three pairs of electrons shared between two different atoms is forms a ________.

• Double bond

• Triple bond

• Single bond

Multiple Choice

According to the pictured models, which statement correctly describes a single bond?

• The 2 pair of green electrons shared between the oxygen atoms.

• The 2 pair of green electrons around the oxygen atom.

• The 2 pair of purple and yellow electrons between both hydrogen and carbon.

• The purple and yellow electrons between hydrogen and carbon.

Multiple Choice

According to the pictured models, which statement correctly describes a double bond?

• The 2 pair of green electrons shared between the oxygen atoms.

• The 2 pair of green electrons around the oxygen atom.

• The 2 pair of purple and yellow electrons between both hydrogen and carbon.

• The purple and yellow electrons between hydrogen and carbon.

Multiple Choice

Using the image, between which two atoms in the model would there be a double bond?

• Carbon & Carbon

• Carbon & Oxygen

• Hydrogen & Oxygen

• Oxygen & Oxygen

Multiple Choice

How many valence electrons does hydrogen have?

• 1

• 3

• 8

• 2

Multiple Choice

How many valence electrons does bromine have?

• 1

• 3

• 8

• 2

Multiple Select

Using the image, between which two atoms in the model would there be a single bond?

-Choose all that apply

• Carbon & Carbon

• Hydrogen & Oxygen

• Oxygen & Oxygen

Multiple Choice

Use the image. If all the bonds formed around one of the Carbon were broken, how many valence electrons would the remaining atom have?

• 8

• 5

• 4

• 3

• 2

Multiple Choice

A variable that is changed in an experiment is the _______.

• Dependent variable

• Independent variable

• Controlled variable

• Constant

Multiple Choice

The variable that is measured in an experiment is called the_______.

• Dependent variable

• Independent variable

• Controlled variable

• Constant variable

Multiple Choice

Variable or an element which is held the same throughout an experiment is the ________.

• Dependent variable

• Independent variable

• Controlled variable

Multiple Choice

Two brands of medication are said to help with heartburn. Lucy is not sure which one is a better brand to make her feel better the fastest. After research, she learns that both neutralize stomach acid pH levels. Brand 1 is more expensive than brand 2. She is wondering if one brand is better than the other.  An experiment is conducted to figure out which brand she should take.

Which is the best testable scientific question that Lucy can answer?

• Do both brands neutralize stomach acid pH levels?

• Does heartburn medication affect the overall body pH?

• Can both brands be used to neutralize the acidity in ones mouth?

• Is brand 1 more effective at neutralizing stomach acid than brand 2?

Multiple Select

Two brands of medication are said to help with heartburn. Lucy is not sure which one is a better brand to make her feel better the fastest. After research, she learns that both neutralize stomach acid pH levels. Brand 1 is more expensive than brand 2. She is wondering if one brand is better than the other.  An experiment is conducted to figure out which brand she should take.

Which is the independent variable? Choose all that apply

• pH levels

• Brand 1

• Brand 2

• temperature

Multiple Choice

Two brands of medication are said to help with heartburn. Lucy is not sure which one is a better brand to make her feel better the fastest. After research, she learns that both neutralize stomach acid pH levels. Brand 1 is more expensive than brand 2. She is wondering if one brand is better than the other.  An experiment is conducted to figure out which brand she should take.

Which is the dependent variable?

• pH levels

• Brand 1

• Brand 2

• temperature

Multiple Select

Two brands of medication are said to help with heartburn. Lucy is not sure which one is a better brand to make her feel better the fastest. After research, she learns that both neutralize stomach acid pH levels. Brand 1 is more expensive than brand 2. She is wondering if one brand is better than the other.  An experiment is conducted to figure out which brand she should take.

Which are the standardized variable? Choose all that apply.

• Starting pH levels

• Amount of Brand 1 & Brand 2 used

• Ending pH levels

• Brand of heartburn medication

Multiple Choice

Neutralization means?

• To get a solution to have a pH of 8-14

• Chemical reaction between acid and a base. pH is 7.

• Chemical reactions between two acids. pH is 2

• Chemical reaction between two bases. pH is 14

Multiple Choice

How does adding baking soda to lemon juice neutralize the pH?

• The H+ bonds with the Na+

• The H+ bonds with the O-

• The Cl- bonds to the O-

• The H+ and Cl- bond to the O-

Multiple Select

Use the image. Which color line is Antacid X & which is Antacid Y?

• Green is Antacid X

• Pink is Antacid X

• Green is Antacid Y

• Green is Antacid Y

Multiple Choice

The graph shows how enzymes affect reactions in cells. Which statement best summarizes the information shown in the graph?

• Enzymes increase the energy of the reactants.
• Enzymes decrease the energy level of the products.
• Enzyme decrease the activation energy of the reaction.
• Enzymes reverse the direction of the reaction.

Multiple Choice

Use the image. When Enzyme X breaks down the Reactant, which model number best represents the reaction?

• Model 1

• Model 2

• Model 3

• Model 4

Multiple Choice

When Enzyme X breaks down the Reactant, Product A and Product B are observed to separate into two layers.

Which claim supports the observation?

• Enzyme X is a base and the Reactant is an acid.

• The reaction between the Reactant and Enzyme X is exothermic.

• The Reactant is hydrophilic and Product A & B is hydrophobic.

• The Reactant stayed solid and the Product A&B turned into gas.

Multiple Choice

Which molecule would most likely react with the enzyme?

• A

• B

• C

• D

Multiple Choice

The diagram shows the mechanism of enzyme action.

What does P represent?

• Enzyme

• Substrate

• Enzyme-substrate complex

• Products of the reaction

Multiple Choice

Which of the following is the enzyme?

• A, only

• E, only

• A and E

• B,C,D

Multiple Choice

Which of the following is the subtrate?

• A, only

• E, only

• A and E

• B,C,D

Multiple Choice

Which of the following are the products?

• A, only

• E, only

• A and E

• B,C,D

Multiple Choice

What is a substance called if it speeds up a chemical reaction?

• catalyst

• cofactor

• coenzyme

Multiple Choice

Enzymes will make a reaction go _______ and use ______ energy.

• faster, less
• faster, more
• slower, less
• slower, more

Multiple Choice

The central idea is...

• the focused idea of the text.

• a detail from the text.

• the first sentence of a paragraph.

• a quote you provide from the text.

Multiple Choice

True or False: The central idea is directly tied to the author's main point or argument.

• False

• True

Multiple Select

In complex texts, the central idea...

• is stated and can be quoted directly from the text.

• is implied, not stated, meaning you must rely on clues in the text to find it.

• is not directly said by the author, meaning you must draw conclusions.

• is said in the title, and therefore, copying the title is a great way to find the central idea.

Multiple Choice

True or false: You do not have to read all of the supporting details to determine the central idea.

• True

• False

Multiple Choice

True or False: One supporting detail could change what your central idea says.

• True

• False

Multiple Choice

Most people think that Johann Sebastian Bach played the piano, but this is not true. The piano was not invented until just two years before he died. Bach's main instrument was the organ. He was a great organist. He wrote a lot of wonderful music for that instrument. He also played other keyboard instruments that were ancestors of the piano. Among these instruments was the harpsichord. Along with Mozart, Bach is considered to be one of the all-time great composers
What is the main idea of this paragraph?

• Mozart and Bach did not compose music for the piano.
• Johann Sebastian Bach was a great organist and writer.
• The piano had not been invented three hundred years ago.
• The harpsichord was a keyboard instrument before the piano.

Multiple Choice

Find the central idea

Being a clown isn't all fun and games. Rodeo clowns expose themselves to great danger every time they perform. When cowboys dismount or are bucked off of bulls at riding competitions, rodeo clowns jump in front of the bulls and motion wildly to get their attention. In this way rodeo clowns provide an alternate target, and in doing so protect the rider. So you see, sometimes clowning around can be serious business

• Being a clown isn't all fun and games.

• Rodeo clowns protect cowboys by putting themselves in danger.

• Rodeos are exciting.

• Clowns are good at riding bulls.

Multiple Choice

The coefficient in front of the chemical formula represents the amount of each reactant and product?

• True

• False

Multiple Choice

Fill in the blanks in order....

• 2, 1, 3

• 3, 2, 1

• 1, 3, 2

• 3, 6, 4

Multiple Choice

What is the missing coefficient?

• 2

• 6

• 1

• 3

Multiple Choice

The number 6.02 x 10²³ is called...

• Obama's number
• Bohr's number
• Trump's number
• Avogadro's number

Multiple Choice

What is the molar mass of NaOH?

• 40 g/mol
• 38.989 g/mol
• 23.998 g/mol
• 57.004 g/mol

Multiple Choice

What is the molar mass of H₂O?

• 6.02 x 10²³
• 16 grams
• 18 grams
• 15.99999 grams

Multiple Choice

Which of the following represent a mole ratio between silver nitrate and copper(II) nitrate in the following reaction:
2AgNO₃ + Cu --> Cu(NO₃)₂ + 2Ag

• 2 mol AgNO₃ / 2 mol Ag
• 2 mol Ag / 2 mol AgNO₃ 
• 2 mol AgNO₃ / 2 mol Cu(NO₃)₂
• 2 mol AgNO₃ / 1 mol Cu(NO₃)₂

Multiple Choice

N₂ + 3H₂ → 2NH₃

What is the mole ratio between N₂ and NH₃ in the above reaction?

• 1 moles NH₃ / 2 moles N₂

• 2 moles NH₃ / 1 moles N₂

• 2 moles N₂ / 3 moles NH₃

• 1 moles N₂ / 3 moles NH₃

Multiple Choice

2Na + S -->Na₂S
What is the total number of moles of Na₂S produced when 8.0 moles of Na were completely consumed?

• 1
• 2
• 0.5
• 4

Multiple Choice

If we have 6 moles of $$NaN_2$$   How many moles of $$N_2$$   could be produced?

• 3

• 6

• 2

• 18

Multiple Choice

How many moles are in 20 grams of Ca (Calcium)?

• 0.5 
• 1
• 3
• 20

Multiple Choice

How many moles are in 32 grams of Oxygen (O)? 

• 3
• 2
• 1
• 4

Multiple Choice

How many moles of oxygen are produced by the Reacting of 60 grams of KCl?

• 0.80 mol O₂

• 2.41 mol O₂

• 1.20 mol O₂

• 180 mol O₂

Multiple Choice

How many moles of NH₃ are produced when 6.8 g of H₂ are used in the reaction provided?

• 27.2 moles NH₃

• 2 moles NH₃

• 4.53 moles NH₃

• 2.27 moles NH₃

Multiple Choice

What is a limiting reactant?

• the reactant that determines how much product can be made
• the reactant that is in excess
• the product that you can make the most of
• the amount of reactants that react with each other

Multiple Choice

Use the equation 2 Al + 3 Cl₂ ---> 2 AlCl₃.  If 2 moles of aluminum and 2 moles of chlorine are reacted, identify the limiting reactant.

• AlCl₃

• Cl₂

• Al

Multiple Choice

If a surface absorbs and attracts water molecules it is....

• clear

• a leaf

• hydrophobic

• hydrophilic

Multiple Choice

Which picture shows a hydrophilic surface?

• A

• B

• neither

• both

Multiple Choice

When placed in oil, hydrophilic amino acids are

• attracted to hydrophobic molecules

• attracted to each other

• attracted to the outside of the protein

• attracted to other hydrophobic side chains

Multiple Choice

In oil, hydrophobic amino acids will

• group together

• effectively dissolve