Mole Concepts

Iodine is homonuclear diatomic. How many atoms of iodine are in a mole of iodine molecules?

• 2 x 53 amu

• 63.55g

• 2 x 126.9 g/mol

• 2 x 6.02 x 10²³

The number 6.02 x 10²³ is called...

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

What is the molar mass of NaCl?

• 58.45g/mol
• 28g/mol
• 12g/mol
• 6.02 x 10²³

We use the periodic table and the average atomic mass to determine the mass of one

• proton in an atom

• isotope of any atom

• mole of any atom

Which has more molecules or formula units (representative particles like atoms or molecules)?

• 1 mole H₂O

• 1 mole Al(OH)₃

• 1 mole NaCl

• There are all the same

Tags

NGSS.HS-PS1-7

A mole of Neon contains
6.02 x 10²³ _____.

• atoms
• formula units
• ions
• molecules

Tags

NGSS.MS-PS1-1

Given the following information, determine the empirical formula of the following compound containing the elements and given these masses.

V = 0.3546 g; O = 0.5580 g. Molar mass V = 50.94 g/mol and Molar mass O = 15.999 g/mol

• V₂O₅

• VO

• VO₂

• V₂O₇

Tags

NGSS.HS-PS1-7

What is the molar mass of one molecule of Nitrogen N₂?

• 14.01 amu
• 14.01 g
• 28.02 g
• 28.02 amu

Tags

NGSS.HS-PS1-1

Individual atoms are extremely small and cannot be put on a typical balance. So, relative atomic masses were used to derive

• molar masses in grams

• atomic masses in amu

• the number of atoms in the universe

• the size of atoms in nanometers

Tags

NGSS.HS-PS1-7

What is the molar mass of sodium?

• 11.00 g

• 22.990 g

• 45.98 g

• 28.00g