Moles and Mass

Which of the following dimensional analysis setups will correctly convert 4.00x10²³atoms of cobalt to moles of cobalt? How many moles of colbalt are there?

• setup B : 0.664 mol Co

• setup A: 2.41x10⁴⁷mol Co

• setup A : 0.664 mol Co

• setup B: 2.41x10⁴⁷mol Co

How many water molecules are in 5.2 moles of water?

• 6.02 x 10²³

• 5.2

• 3.1304 x 10²⁴

• 8.638 x 10^-24

A mole of Neon contains
6.02 x 10²³ _____

• atoms

• formula units

• ions

• molecules

1 mole of Ca and 1 mole of Na have the same number of atoms.

• True

• False

How many moles of carbon atoms are there in 5g of carbon?

• 60 mol

• 17 mol

• 0.42 mol

• 7 mol

How many grams of carbon dioxide are in 0.5 mol of carbon dioxide?

• 11 g

• 44.009 g

• 22.005 g

• 88.018 g

Tags

NGSS.HS-PS1-7

Calculate the mass of 0.25 mol of carbon dioxide molecules. (M_r: CO₂ = 44) (Higher Tier Question)

• 33 g

• 11 g

• 12 g

• 16 g

Using your periodic Table, calculate the formula mass of NH₃.

Tags

NGSS.HS-PS1-7

An element's molar mass can be found on what part of an element's entry on the periodic table?

• atomic number

• atomic mass

• group number

• it can't be found on the periodic table

What is the mass of 1 mole of water?

(Higher Tier Question)

• 16 g

• 2 g

• 18 g

• 6.02 g