avogadro's number

How many atoms of iodine are in a mole of iodine?

• 53
• 63.55g
• 126.9
• 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 Br?

• 79.9 g / mol

• 79.9 mol / g

• 35 g / mol

• 35 mol / g

What is the molar mass of Carbon?

• 6 g / mol

• 6 mol / g

• 12.0 g / mol

• 12.0 mol / g

What is the molar mass of N₂O₄?

• 6 g / mol

• 30 g / mol

• 92 g / mol

• 100 g / mol

The law of conservation of mass states that the total mass of products must _____.

• never equal the total mass of the reactants.

• equal the total mass of the reactants.

• destroy atoms of the reactants.

• create new atoms from the reactants.

Tags

NGSS.MS-PS1-5

What is Avogadro's Number?

• 6.023 x 10²³

• 6.023 x 10^-23

• 6.023

• 6.023 x 10¹⁰⁰

How many atoms are there in one mole of carbon?

• Avogador's number

• 28000

• 6.022x10^23

• A lot

What is the mass of one mole of carbon atoms?

• 20 g/mol

• 16 g/mol

• 4 g/mol

• 12 g/mol

What is the mass of one mole of carbon dioxide (CO₂)?

C = 12g/mol

O = 16g/mol

• 44 g/mol

• 50 g/mol

• 31 g/mol

• 16 g/mol