Moles, Mass, and Volume Stoichiometry

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

• 48.0 g/mole

• 34.0 g/mole

• 36.5 g/mole

• 35.5 g/mole

What is the molar mass of (NH₄)₂CO₃ ?

• 144.0g

• 138.0 g

• 96.1 g

• 78.1 g

How many particles are in 13.5 grams of Beryllium?

• 1.50 particles

• 9.03 particles

• 4.00x10²³ particles

• 9.03x10²³ particles

How many moles are in 98.3 g of Aluminum Hydroxide (Al(OH)₃)?

• 78.0 mol

• 1.30 mol

• 6.60 mol

• 5.90 mol

Tags

NGSS.HS-PS1-7

How many grams are in 3.3 mol of Potassium Sulfide (K₂S)?

• 3.6 x 10 ² g

• 454 g

• 238 g

• 3.6399 x 10 ² g

Tags

NGSS.HS-PS1-7

A mole of potassium chloride (KCl) contains 6.02 x 10²³ _____.

• atoms
• formula units
• ions
• molecules

How many grams are in 1.2 x 10²⁴ molecules of CO?

• 28 grams

• 56 grams

• 6.0 grams

• 1.2 grams

How many water molecules are in 5.2 moles of water?

• 6.02 x 10²³

• 5.2

• 3.1 x 10²⁴

• 8.6 x 10 ^-24

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

Avogadro's number of representative particles is equal to one_____.

• liter

• gram

• molecule

• mole

Tags

NGSS.HS-PS1-7