Stoichiometry and Avogadro

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

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

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

• 0.05 moles
• 1.81 x 10⁴⁶ moles
• 5.00 x 10²¹ moles
• 5 moles

Tags

NGSS.HS-PS1-7

If an atom of Fluorine has an atomic mass of 19 amu, it has a Molar mass of ____

• 19 lbs.
• 19 kg
• How am I supposed to know?
• 19 g/mol

What are the units for molar mass?

• grams
• amu
• grams/mole
• liters

Tags

NGSS.HS-PS1-7

How many zinc atoms are in 65.4 grams of zinc (Zn).

• 10

• 4,277.2

• 6.02x10²³

• 130.8

How many atoms are in 117.3 grams of Potassium?

• 1.80x10²⁴ atoms

• 39.1 atoms

• 3 atoms

• 6.02x10²³ atoms

What has the most mass?

1 trillion atoms (1.0x10¹⁸) of zinc

1 trillion atoms of iron or

1 trillion atoms of aluminum

• zinc

• iron

• aluminium

1 mole of zinc is how many atoms?

• 65.4

• 6.02x10²³

• 6.54x10²³

• 0.000,000,000,000,000,000,000,654

How many moles of copper are 4.57 x 10¹³ atoms of copper?

• 7.59 x 10^-11 moles
• 2.75 x 10³⁷ moles
• 7.59 x 10¹¹ moles
• 2.75 x 10³³ moles

How many moles of sulfur atoms are there in 5.0 g of sulfur?

• 160 mol
• 8.3 x 10^-24 mol
• 0.16 mol
• 2.7 x 10^-22 mol