Converting moles to molecules

Which of these is true for the chemical formula 4NH₃?

• 3 Nitrogen atoms
• 7 Hydrogens atoms
• 12 Nitrogens atoms
• 12 Hydrogens atoms

Tags

NGSS.MS-PS1-1

What do you call the 3 in 3CO₂?

• Coefficient
• Subscript
• Compound Number

Tags

NGSS.MS-PS1-1

How many grams is 1.2 moles of Neon?

• 0.05 grams
• 16.6 grams
• 21.2 grams
• 24 grams

How many grams are in 5.6 moles of sodium bromide?

• 36.8 g/mol
• 18.4 g
• 576 g/mol
• 576 g

Tags

NGSS.HS-PS1-7

Convert 28.0 grams of O₂ to moles.

• 1.14 moles
• 1.75 moles
• 0.571 moles
• 0.875 moles

Change 7.00 moles of Na₂SO₄ into grams.

• 20.3 grams
• 994 grams
• 770 grams
• 0.0493 grams

Tags

NGSS.HS-PS1-7

How many moles are in 16.94g of H₂O?

• 16.94
• 0.9403
• 305.2
• 1.063

Covalent compounds are called molecules.  Ionic compounds are called formula units.  How many moles of CaO contain 6.02x10²⁵ formula units? 

• 100
• 1
• 56
• 560

Tags

NGSS.HS-PS1-7

How many molecules are in 9.4 moles of AlCl₃?

• 5.66
• 5.66x10²⁴
• 0.705
• 1.25x10²³

How many atoms are in 8.5 mole of nickel?

• 8500 Ni atoms
• 6.02 * 10²³ Ni atoms
• 5.1 * 10²⁴ Ni atoms
• 5.1 * 10²³ Ni atoms

Tags

NGSS.HS-PS1-7