Chemistry Second Semester Review: Units 4-9

• 10:6

• 3:4

• 2:3

• 4:3

Tags

NGSS.HS-PS1-7

The limiting reactant of a reaction can be used to calculate the

• actual yeild.

• theoretical yield.

• experimental yield.

• Both (a) and (c).

The coefficients in a chemical equation represent the

• masses, in grams, of all reactants and products.

• numbers of moles of reactants and products.

• number of atoms in each compound in a reaction.

• number of valence electrons involved in the reaction.

Tags

NGSS.HS-PS1-7

The units of molar mass are

• g/mol.

• mol/g.

• amu/mol.

• amu/g.

Tags

NGSS.HS-PS1-7

• 2.0 ml

• 6.0 mol

• 12 mol

• 18 mol

Tags

NGSS.HS-PS1-7

Which observation DOES NOT indicate that a chemical reaction has occurred?

• formation of a precipitate

• production of a gas

• evolution of heat and light

• change in total mass of substances

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

When a solid produced by a chemical reaction separates from the solution it is called

• a precipitate.

• a reactatnt.

• a molecule.

• the mass of the product.

According to the law of conservation of mass, the total mass of the reacting substances is

• always more than the total mass of the products.

• always less than the total mass of the products.

• sometimes more and sometimes less than the total mass of the products.

• always equal to the total mass of the products.

Tags

NGSS.HS-PS1-7

• 1, 2, 2

• 1, 1, 2

• 2, 1, 1

• 2, 2, 2

What is the balanced equation for the combustion of sulfur?