Chemistry Semester 2 Final Exam

What is chemical reaction?

• A change in state of matter

• A change in shape of substance

• A combination of substances

• A change from one substance to another

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

Which of these is a decomposition reaction?

• H2O2 ----> H2 + O2

• H2O + CO2 ---> O2 + C6H12O6

• Fe + H2O ---> FeO + H2

• NaCl + KF -----> NaF + KCl

Tags

NGSS.MS-PS1-5

If you have 50 grams of a salt dissolved in 100 grams of water, what is the solute?

• Salt

• Water

• 50%

• Salt Water

Which of the following is not a common result of aqueous solution reactions?

• Water

• Precipitates

• Gases

• Metal

How many particles are in a mole?

• 6.02

• 6.20

• 6.02 x 10^23

• 6.02 x 10^24

What does molar mass equal?

• Weight of the atom electrons

• Atomic Mass in grams

• The mass of protons

• The volume per kilogram

Tags

NGSS.HS-PS1-7

What is the Molar mass of CO2

• 6

• 22

• 44

• 56

What do coefficients tell us?

• The number of atoms

• The number of electrons

• The atomic mass

• The number of particles

Tags

NGSS.HS-PS1-7

What is the limiting reactant in H2 + O2 ----> H202 if you have 20 grams of H2 and 30 grams of O2?

• H2

• O2

• H2O2

• None of these

Tags

NGSS.HS-PS1-7

What is the theoretical yield?

• The amount of product produced under perfect conditions

• The amount of product produced when at capacity

• The amount of product produced when all materials are used

• The amount of product that is used

Tags

NGSS.HS-PS1-7