Intro Stoichiometry II

What is the molar mass of Ca(OH)₂

• 58.1g/mol

• 84.0g/mol

• 74.1g/mol

Molar mass is in units of ________.

• grams
• grams/mole
• mole
• moles/gram

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

• Write a Balanced Equation

• Panic

• Write an Unbalanced Equation

• Avogadro's Number

How many moles are in 45.6 g Ca?

• 0.879mol Ca

• 1.14mol Ca

• 1.50mol Ca

• 0.62 mol Ca

Tags

NGSS.HS-PS1-7

How many grams are in 10.2 moles of NaCl?

• 597grams

• 5.74 grams

• 579 grams

• 7.65 grams

Balance the following reaction :

CaCl₂(s) + H₂O(l) --> HCl(g) + Ca(OH)₂(aq)

• 1,2,2,1

• 1,2,1,1

• 2,1,1,1

• 2,1,2,1

How many grams are in one mole of Nitrogen gas (N₂)?

• 14.0

• 28.0

• 14.011

• 28.50

Balance this reaction: ____ LiNO₃ + ____ MgF₂ ----> ____ Mg(NO₃)₂ + ____ LiF

• 1,1,1,1

• 1,2,1,1

• 2,1,1,2

• 2,1,2,1

Which of the following shows the correct way to balance the chemical equation?
Fe + O₂ -> Fe₂O₃

• 4Fe + 3O₂ -> 2Fe₂O₃
• 2 Fe + 3O₂ -> Fe₂O₆
• 4 Fe + O₆ -> 2Fe₂O₃
• None of the options are correctly balanced.

Tags

NGSS.MS-PS1-5

How many O atoms are in Al₂(CO₃)₃?

• 2

• 3

• 6

• 9

Tags

NGSS.MS-PS1-1