Chemistry Semester 2 Final Day 1

Which of the following is not true about one mole?

• one mole contains 6.02 x 10^23 particles

• 12 g of carbon equals one mole of carbon atoms

• the mass of 1 mole of carbon atoms = the mass of 1 mole of boron atoms

• the number of atoms in 1 mole of carbon = the number of atoms in 1 mole of boron

The number oxygen atoms represented by the formula Pb(C₂O₄)₂ is

• 2

• 4

• 6

• 8

Tags

NGSS.MS-PS1-1

The molar mass of Na2CO3 is

• 51.0 g/mol

• 83.0 g/mol

• 96.0 g/mol

• 106.0 g/mol

The following chemical equation is balanced: Fe2O3 → 2Fe + 3O2

• True

• False

Tags

NGSS.HS-PS1-7

What does 6.02 x 10^23 represent?

• The number of moles in the molar mass of any substance

• The number of particles in 12 grams of any substance

• The number of particles in 1 mole of any substance

• The number of grams in the molar mass of any substance

Tags

NGSS.HS-PS1-7

What is the actual yield?

• The amount of error seen in the amount of product produced.

• The calculated amount of product that should ideally be produced.

• The difference between the calculated amount of product and actual amount.

• The amount of product produced in an experimental reaction.

Tags

NGSS.HS-PS1-7

Why does heating a reaction increase the reaction rate?

• It increases the number of particles

• It increases the number of collisions

• It increases the concentration of the particles

• It increases the activation energy

Tags

NGSS.HS-PS1-5

The following chemical equation is balanced: 2H2O2 → 2H2O + O2

• True

• False

Tags

NGSS.HS-PS1-7

What information can we get from looking at the percent yield?

• How much product should have been produced during the reaction.

• How much reactant is needed to run a chemical reaction.

• How accurate the results of the chemical reaction are.

• What equipment you will need to run a chemical reaction.

Which of the following is always equal on each side of the arrow in balanced chemical reaction?

• Sum of the coefficients

• Sum of the subscripts

• Total number of molecules

• Total number of atoms

Tags

NGSS.HS-PS1-7