You chew a 2.50 g piece of gum for 5 minutes. After chewing, 0.25 g of material remains. How much of the gum was indigestible rubber like polymer?

• 0.00 g

• 500. 2.50 g

• 0.25 g

• 2.25 g

Tags

NGSS.MS-PS1-5

Which conversion factor should be used to solve the following, "How many moles in 28 grams of CO₂?"

• 1 mol =12.0 g 

• 1 mol = 44.01 g
• 1 mol = 6.02x10²³ atoms
• 44.01 g = 6.02x10²³ atoms

Tags

NGSS.HS-PS1-7

Which conversion factor should be used for the following question " How many molecules are there in 4.00 moles of glucose, C₆H₁₂O₆? 

• 1 mole = 180. g

• 180. 180. g = 6.02x 10²³ particles  

• 1 mol = 6.02x 10²³ particles 
• 1 molecule = 24 atoms

Which of the following dimensional analysis setups will correctly convert 27.76g of Li to atoms of Li?

• A
• B
• C
• D

Tags

NGSS.HS-PS1-7

Which conversion factor(s) should be used to solve the following, "Find the mass in grams of 2.00 x 10²³ molecules of F₂."

• 1 mol = 22.4 L

• 1 mol = 38.00 g

• 1 mol = 6.02x10²³ atoms

• 1 mol = 19.00 g

• 1 mol = 6.02 g

What is the molar mass of Hydrogen Peroxide (H₂O₂)?

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

What is the mass of 0.89 mol of H₂O? 1 mol H₂O = 18.0 g

• 20.2 grams

• 0.049 grams

• 16.0 grams

• 5.4x10²³ grams

How many moles are in 16.94g of water? 1 mol H₂O = 18.0 g

• 16.94 mol H₂O
• 0.9401 mol H₂O
• 305.3 mol H₂O
• 1.063 mol H₂O

Tags

NGSS.HS-PS1-7

How many atoms of carbon are in 6.00g of carbon?

• 1.20x10²⁴atoms C
• 6.02x10²³atoms C
• 3.01x10²³atoms C
• 1.50x10²³atoms C

Tags

NGSS.HS-PS1-7

How many total atoms are in 1.19x10²³ molecules of H₂O?

• 0.198 atoms

• 3.57x10²³ atoms

• 1.20x10²³ atoms

• 18.0 atoms

Tags

NGSS.MS-PS1-1