Mole calculations

What is the unit for molar mass?

• no unit
• g
• g mol^-1

Tags

NGSS.HS-PS1-7

How many particles are in 13.5 grams of Beryllium?

• 1.5 particles
• 9 particles
• 4x10²³ particles
• 9x10²³ particles

Tags

NGSS.HS-PS1-7

Calculate the number of gold atoms in a 4 mole sample of gold.

• 2.41x10²⁴
• 3.01x10²³
• 4.82x10²⁴
• 6.02x10²³

Tags

NGSS.HS-PS1-7

Calculate the mass of iron in a sample of iron ore containing 2.61x10²³ iron atoms.

• 0.433g
• 24.2g
• 44g
• 6.02g

Tags

NGSS.HS-PS1-7

Calculate the number of molecules present in 14kg of Ba(NO₃)₂

• 53.578 atoms

• 1.93x10²⁶ atoms

• 3.22x10²⁵ atoms

• 6.44x10²² atoms

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

• 1 mole = 78.12 g
• 1 mole = 22.4 L 
• 1 mol = 6.02x 10²³ particles 
• more than one

What is Avogadro's Number? 

• 6.02 x 10²³
• - 6.02 10²³
• 6.02 x 10²²
• 6,020,000,000,000

Tags

NGSS.HS-PS1-7

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 

How many atoms are in 1 mole of NaCl? 

• 6.02 x 10²³
• 58 
• 11
• 17

Tags

NGSS.HS-PS1-7

How are the mole and atomic masses of elements related?  

• The atomic mass of any substance is always equal to 1 mole of that substance 
• The atomic mass added up with itself by 6.02 x 10²³ equals the amount of atoms
• The atomic mass is the amount of protons plus number of atoms
• Atoms combined make up molecules, which are the measurement of atomic masses