Module 6

Question 1

Molar mass of a atom

Answer 1

Expressed as u
u = 1.661 x 10^-24
1 mole of atom is expressed in grams

Question 2

Atomic mass & Molar mass

Answer 2

They are interchangeable terms depending on what you need

Question 3

Compound molar mass

Answer 3

Add up each elements molar mass for answer
CO2 = 12g/m of C + (2)16g/m of Oxygen = 48 g/m

Question 4

Findings moles in compound

Answer 4

Take the grams present and divide by the molar mass

Question 5

Finding atoms in the compounds

Answer 5

Using the moles of the compound , multiply it by 2.
Then multiply it all by avocados number
(6.022 x 10^22)

Question 6

Finding percent composition

Answer 6

Total mass of element divided by the compound mass .
If it was from another number not 100 , multiply result by that number.

Question 7

Empirical Formula

Answer 7

Smallest whole number ratio of atoms in compound

Question 8

Empirical Formula & Ionic Compounds

Answer 8

Most ionic compounds are identified by the formula.

Question 9

Empirical Formula & Covalent Compounds

Answer 9

Will always be some multiple of the empirical formula

Question 10

Molecular formula

Answer 10

Gives the actual number of elements of the covalent compound. A integer of the empirical