Stoich Concepts Practice

What is the first thing you must do to solve a stoichiometry problem?

• Write a Balanced Equation
• Panic
• Write an Unbalanced Equation
• Ask for help

Identify the limiting reagent when 6.00 moles HCl combines with 5.00 moles Mg to form MgCl₂.
 
1 Mg +  2 HCl --> 1 MgCl₂  +  1 H₂   
 

• Mg
• H₂
• MgCl₂
• HCl

Tags

NGSS.HS-PS1-7

What is the mass of 1 mole of Oxygen?

• 16 g
• 16 amu
• 16 x # of moles
• 16 x Avagadro's number

Rounded what is the mass of 1 moles of Hydrogen molecule (H₂)?

• 1 amu
• 1 g
• 2 g
• 2 amu

Tags

NGSS.HS-PS1-7

Avagadro's number equals

• 6.02 x 10²³ atoms
• 6.02 x 10²³ formula units
• 6.02 x 10²³ molecules
• All of these

Tags

NGSS.HS-PS1-7

Conservations of mass says that the number of atoms in a reaction are ________ as the number of atoms that produced

• the same
• different
• warmer
• colder

Tags

NGSS.HS-PS1-7

Stoichiometry is measuring chemicals....

• Penguins Defenseman Jack Johnson

• with the equal amount of reactants and products

• that go into, and come out of, any reaction

• in a balanced equation

Tags

NGSS.HS-PS1-7

One mole of a single atom of any element (found on the Periodic Table) is the same as the ________ in grams.

• atomic mass
• # of protons - # of neutrons
• atomic number
• Group #

Tags

NGSS.HS-PS1-7

Molar Mass

• the reactant that gets all used up

• 6.02 x 10^23

• the mass in grams of a mole of a substance

• the number before a formula in a balanced equation

Excess Reactant

• 6.02 x 10^23

• the mass in grams of a mole of a substance

• the reactant that has some left over at the end of the reaction

• the number before a formula in a balanced equation