Topic 6.

Question 0

What’s the symbol for relative atomic mass?

Answer 0

Ar

Question 1

Relative atomic mass.

Answer 1

The relative atomic mass is the same as it’s mass number.

Question 2

What’s the easiest way to see the relative atomic mass from a element?

Answer 2

The biggest number next to the element on the periodic table is the relative atomic mass.

Question 3

Example which number is the relative atomic mass?

Answer 3

Helium- 4 (above) and 2 (below).

Question 4

Relative formula mass.

Answer 4

Is the relative atomic masses of two elements added together for example of MgCl add both of the Ar’s together.

Question 5

What’s the symbol for relative formula mass?

Answer 5

Mr

Question 6

Practice finding the relative formula mass.

Answer 6

Find questions.

Question 7

What’s the formula for finding the percentage mass of an element in a compound?

Answer 7

Relative atomic mass x number of atoms (of an element) divided by the relative formula mass (of whole compound) x 100

Question 8

Finding the empirical formula (step by step)

Answer 8

1. List all the elements in the compound (usually two or three).
2. Underneath them, write their experimental masses.
3. Divide each mass by the relative atomic mass for the particular element.
4. Turn the numbers into a ratio.
   By multiplying/dividing them by well chosen numbers.
5. Get the ratio to its simplest form.

PRACTICE.

Question 9

Calculating the masses in reactions.

Answer 9

1. Write out the balanced equation.
2. Work out the relative formula mass- for the parts you need.
3. Apply the rule- divide to get one, multiply to get all.
   PRACTICE.

Question 10

Percentage yield.

Answer 10

Mass of product it produces.

More reactants you start with the higher the yield will be.