Mass to Mole Conversions (#2)

For question (c), what is the given in the problem?

• 25 grams of C₃H₈

• 2.8 moles of propane

• 38 moles of CO₂

Tags

NGSS.HS-PS1-7

What is our ending unit (unknown)? What are we looking for in this problem?

• moles of CO₂

• moles of water

• moles of propane

Tags

NGSS.HS-PS1-7

What will we use to go from moles of C₃H₈ to moles of H₂O?

• mole ratio

• molar mass

• molar measurement

Grab your periodic table and a calculator. What is the molar mass of propane, C₃H₈?

• 44.1 grams

• 28.2 grams

• 75.2 grams

What is the mole ratio between C₃H₈ and H₂O?

• 1 mole C₃H₈   :   4 mole H₂O

• 1 mole C₃H₈   :   3 mole H₂O

• 2 mole C₃H₈   :   5 mole H₂O

Tags

NGSS.HS-PS1-7

Grab a calculator. What is the answer to this problem?

• 2.27 moles H₂O

• 3.49 moles H₂O

• 17.3 moles H₂O

Tags

NGSS.HS-PS1-7

For question (d), what is the given?

• 38 grams of H₂O

• 2.8 moles of propane

• 25 grams of O₂

For question (d), what is the ending unit (unknown)? What are we looking for?

• moles of CO₂

• grams of H₂O

• moles of C₃H₈

Tags

NGSS.HS-PS1-7

How can we change grams of H₂O to moles of H₂O?

• by using the molar mass of water

• by using the mole ratio

• by using the equation

How can we change moles of H₂O to moles of CO₂?

• mole ratio

• molar mass

• molar measurement

Tags

NGSS.HS-PS1-7