Science 9 M5 Week 1-2

What is the mass, in grams, of 4.725 mole of aluminum oxide Al₂O₃?{Al = 27, O = 16}

• 964 g

• 482 g

• 1928 g

How many moles of iron (III) oxide are contained in 276 g of pure Fe₂O₃? {Fe = 56, O = 16}

• 0.57 moles

• 1.71 moles

• 3.42 moles

states that “equal volumes of gases at the same temperature and pressure contain equal numbers of particles”.

• Avogadro's hypothesis

• Newton's hypothesis

• Bohr's hypothesis

What is a Mole?

• An Animal that digs

• A unit of measure that counts number of atoms

• A blemish on the face

• A relationship between products and reactants

 What does Avogadro's Number equal?

• Nothing it's a pant 

• 18

• 20000

What is Stoichiometry?

• It's the quantitative relationship between reactants and products in a reaction

• It's the study of bugs

• It's the mas of the object

• it's the volume of the object

What are products?

• It's the answer when with multiplication

• It's the atomic mass

• The end part of the reaction (behind the arrow)

• The start of the reaction (in front of the arrow)

What is reactants?

• The start of the reaction (before the arrow)

• The end of the reactions (after the arrow)

• It's the volume

• It's the atomic mass

What is Molar Mass

• one mole of the pure substance

• the weight of the compound added together

• the atomic weight of elements

• the balanced equation

When iron rusts in air, iron(III) oxide is produced. How many moles of oxygen react with 2.4 mol of iron in

the rusting reaction?

4Fe(s) + 3O2(g) → 2Fe2O3(s)

• 1.2 mole

• 1.8 mole

• 2.4 mole

• 3.2 mole