Chem Review Spring Final

The reactant that gets used up in a chemical reaction

• isotope

• excess reactant

• limiting reactant

• mole ratio reactant

Tags

NGSS.HS-PS1-7

How many elements make up C₃H₇OH?

• 3

• 4

• 12

• 1

Tags

NGSS.MS-PS1-1

What is the charge on NO₃?

• +1

• +2

• -1

• -2

In mole conversions & in stoichiometry, what you are solving for

• goes on top

• goes on bottom

• is what you start with

• is step 2 in the process

Where are the most electronegative elements on the periodic table?

• top left

• top right

• bottom left

• bottom right

Given the following balanced equation: 2 CO + O₂ >> 2 CO₂, how many liters of oxygen are required to burn 3.86 liters of CO₂?

• 43.2 L O₂

• 22.4 L O₂

• 7.72 L O₂

• 1.93 L O₂

How many grams of H₂O can form by 2.40 mol C₂H₂ and 7.40 mol O₂ reacting?

2 C₂H₂ + 5 O₂ >> 4 CO₂ + 2 H₂O

• 2.96 g

• 43 g

• 0.13 g

• 81 g

Tags

NGSS.HS-PS1-7

Given the following balanced equation: 2 C₂H₂ + 5 O₂ >> 4 CO₂ + 2 H₂O, how many grams of CO₂ will form if 52.0 g C₂H₂ reacts with O₂?

• 176 g

• 44 g

• 88 g

• 36 g

Tags

NGSS.HS-PS1-7

What would the coefficients need to be to balance this equation:

CaC₂ + H₂O >> C₂H₂ + Ca(OH)₂

• 1, 2, 2, 1

• 1, 2, 1, 1

• 1, 1, 1, 2

• 2, 1, 1, 1

What is the molar mass of KClO3?

• 149 g/mol

• 248 g/mol

• 90.5 g/mol

• 122.5 g/mol