Day # 5 Mols, Mass, and Chemical Equations

The number 6.02 x 10²³ is called...

• Obama's number
• Bohr's number
• Trump's number
• Avogadro's number

Which has more molecules?

• 1 mole H₂O
• 1 mole Al(OH)₃
• 1 mole NaCl
• There are all the same

We use the periodic table to calculate...

• mass
• molar mass
• moles

The molar mass of an element is equal to its...

• Atomic mass
• Atomic number
• Oxidation number
• Valence electrons

What is the mass of one mole of aluminum?

• 27 g
• 13 g
• 54 g
• 14 g

How many particles are in a mole?

• 602
• 602 million
• 602 moles
• 6.02 x 10²³

Element or compound?
H₂O

• element
• compound

How many atoms of carbon (C) are in C₆H₁₂O₆?

• 3
• 6
• 12
• 24

How many oxygen atoms are in 
(NH₄)₃PO₄

• 1
• 4
• 3
• 12

In chemical reactions, what does the principle of conservation of mass mean?

• Matter is not created or destroyed.
• The total mass of the reactants is greater than the total mass of the products.
• The total mass of the reactants is less than the total mass of the products.
• Matter is not changed.