Chem Unit 6 Review: Stoichiometry

Where do we find the MOLE RATIO that can be used for stoichiometry?

• molar mass of each substance

• coefficients in a balanced chemical equation

• on the periodic table

• total mass of the products

What is the MOLE RATIO between O₂ and H₂O?

• 4:4

• 5:4

• 4:6

• 5:6

The coefficients in the balanced chemical equation show:

• molecules and moles

• molecules and grams

• moles and grams

• molecules, moles & grams

• 100.09g

• 100g

• 100.2g

• 101g

• 89mol

• 0.90mol

• 0.89mol

• 84mol

2Al + 6HCl --> 2AlCl₃ + 3H₂

Aluminium reacts with hydrochloric acid. How many grams of aluminum are necessary to produce 11 L of hydrogen gas at STP?

• 13

• 8.8

• 0.99

• 1.0

How many particles are in a mole?

• 602
• 602 million
• 602 moles
• 6.02 x 10²³

Balance this reaction: ____ RbNO₃ + ____ BeF₂ ----> ____ Be(NO₃)₂ + ____ RbF

• 1,1,1,1
• 1,2,1,1
• 2,1,1,2
• 2,1,2,1

Which one is the empirical formula?

C₄H₆

• CH

• CH₃

• C₂H₃

• C₄H₆

A chemical formula that shows the actual # and kinds of atoms present in one molecule of a compound is called_________

• ionic formula
• covalent formula
• empirical formula
• molecular formula