Moles and Mass

How many representative particles are found in 1.23 mol of Polonium. 

• 2.41x10²⁴

• 7.53x10²³

• 6.02x10²³

• 1.20x10²⁴

What is the molar mass of sodium?

• 11 g/mol

• 23 g/mol

• 45.98 g/mol

• 3 g/mol

What is the mole used for? 

• To measure the amount of grams in a substance

• To measure the amount of atoms or molecules in a substance

• To measure the amount of energy in a substance

• To measure the amount of bonding in a substance 

Tags

NGSS.HS-PS1-7

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

• Atomic mass (from the periodic table)

• Atomic number (from the periodic table)

• Oxidation number

• Valence electrons

What is the molar mass of cyanide (CN-).

• 13 g/mol

• 24.02 g/mol

• 26.02 g/mol

• 42.02 g/mol

What is the molar mass of B₂(CO₃)₃?

• 81.632 g/mol

• 94.842 g/mol

• 38.822 g/mol

• 201.648 g/mol

How many grams are in 3.62 mol of dicarbon tetroxide?

• 88.0

• 3.62

• 319

• 159

Tags

NGSS.HS-PS1-7

How many moles are in 6 x 10²³ molecules of H₂O?

• 1

• 2

• 6

• 600

Tags

NGSS.HS-PS1-7

How many atoms are in 1.50 moles of Hg?

• 9.03x10²³ atoms Hg

• 9.03x10²⁴ atoms Hg

• 903 atoms of Hg

• 9.03 atoms of Hg

Which conversion factor would you use to calculate correctly the mass of 2 moles of the element titanium?

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