T01 - Formulae, Equations and Amount of substances

N₂ + 3H₂ --> 2NH₃
What is the total number of moles of NH₃ produced when 10 moles of H₂ reacts completely with N₂?

• 6.7
• 2.0
• 3.0
• 15.0

Tags

NGSS.HS-PS1-7

What are the units for molar mass?

• grams
• amu
• grams/mole
• liters

What is the molar mass of dihydrogen dioxide (H₂O₂)?

• 48 g/mole
• 34.02 g/mole
• 36.5 g/mole
• 35.5 g/mole

The number 6.02 x 10²³, which is the number of particles found in a mole. 

• molar mass
• mole
• Avogadro's number
• hydrate

Considering the UNBALANCED reaction:

Fe₂O₃(s) + CO(g) --> Fe(s) + CO₂(g)

How many moles of carbon dioxide are produced from 5.5 moles of carbon monoxide?

• 5.5 moles

• 2.75 moles

• 11 moles

• 7 moles

How many moles are in 3.01 x 10²² atoms of magnesium?

• 0.050 moles
• 1.81 x 10⁴⁶ moles
• 5.00 x 10²¹ moles
• 5.00 moles

Tags

NGSS.HS-PS1-7

Which of the following would have the highest number of moles?

• 4g CO₂
• 15g H₂O
• 22g NaCl
• 100g AgCl

How many grams of Hydrogen are there in 25 moles of water?

• 25 g
• 450 g
• 18 g
• 50 g

Tags

NGSS.HS-PS1-7

What is the difference between a formula unit and a molecule?

• formula unit - ionic bond
  molecule - covalent bond
• formula unit - big
  molecule - small
• formula unit - covalent bond
  molecule - ionic bond
• formula unit - small
  molecule - big