Unit 1E Empirical & Molecular Vocab Practice

The total mass of an element or compound

• mass number

• molar mass

• atomic number

Tags

NGSS.HS-PS1-7

Which of the following is a synonym for "molar mass" ?

• orbital

• formula mass

• atomic number

What is the molar mass of diatomic nitrogen, N_²?

• 14.01 g/mol

• 28.0 g/mol

• 15.0 g/mol

What is the molar mass of Be?

• 9.0 g/mol

• 4.0 g/mol

• 2.0 g/mol

Tags

NGSS.HS-PS1-1

What is the formula mass of BeO ?

• 9.0 g/mol

• 10.0 g/mol

• 22.0 g/mol

• 25.0 g/mol

Tags

NGSS.HS-PS1-1

A chemical formula shows

• the properties of elements

• the types and number of atoms in a compound

• reactivity

Tags

NGSS.MS-PS1-1

Which type of chemical formula gives the simplest ratio of elements in a compound?

(Which is a simplified formula?)

• chemical formula

• molecular formula

• empirical formula

Which type of chemical formula shows the actual number of atoms in a compound?

• empirical formula

• molecular formula

What are the units for molar mass & formula mass?

• grams
• amu
• grams/mole

Tags

NGSS.HS-PS1-7

What is the molar mass of Fe?

• 26 g/mole
• 55.85 g/mole
• 6.02 x 10²³ g/mole