Moles Chemistry

For the Balanced Reaction: 3 Mg + 1 Fe₂O₃ → 3 MgO + 2 Fe; What is the Ratio of moles of Mg to moles Fe?

• 3mol Mg / 2 mol Fe

• 2 mol Mg/ 3 mol Fe

• 1 mol Fe/ 2 mol Fe

• 3 mol MgO / 2 mol Fe

Tags

NGSS.HS-PS1-7

For the Balanced Reaction: 3 Mg + 1 Fe₂O₃ → 3 MgO + 2 Fe; What is the Ratio of moles of MgO to moles Fe?

• 3mol Mg / 2 mol Fe

• 2 mol Mg/ 3 mol Fe

• 1 mol Fe/ 2 mol Fe

• 3 mol MgO / 2 mol Fe

2Na + S -->Na₂S
What is the total number of moles of S that reacts when 4.0 moles of Na were completely consumed?

• 1

• 2

• 0.5

• 4

Tags

NGSS.HS-PS1-7

2 C₂H₆ + 7 O₂ → 4 CO₂ + 6 H₂O

Ethane (C₂H₆) combusts in the above reaction. What is the mole ratio of carbon dioxide to water?

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Tags

NGSS.MS-PS1-5

What is the molar mass of Carbon Dioxide (CO₂)?

• 12 amu

• 12 g

• 44 g

• 44 amu

How many particles are in one mole?

• 6.022X10²²

• 6.022X10²³

• 6.023X10²²

• 6.023X10²²

How do you go from particles to moles?

• multiply by A#

• divide by A#

• multiply by MM

• divide by MM

How do you go from moles to grams?

• multiply by MM

• multiply by A#

• divide by A#

• divide by MM

How do you go from mole to particles?

• divide by MM

• divide by A#

• multiply by MM

• multiply by A#

How do you from grams to moles?

• multiply by MM

• divide by MM

• multiply by A#

• divide by A#