C3 (chemistry)

Question 1

What is the equation for relative atomic mass?

Answer 1

Relative automatic mass=Total mass of all atoms of an element ÷ total number of atoms of that element

Question 2

What does Ar stand for?

Answer 2

Relative atomic mass

Question 3

What is the relative atomic mass?

Answer 3

The mass number

Question 4

Define relative atomic mass

Answer 4

Relative atomic mass is the average mass of atoms compared to 1/12th of carbon-12

Question 5

What is Mr?

Answer 5

Relative molecular mass

Question 6

How do you calculate the percentage composition by mass?

Answer 6

% mass = (element mass ÷ compound mass) x 100

Question 7

What is the conservation of mass?

Answer 7

Mass of reactant = mass of products

Question 8

What does one mole equal?

Answer 8

1 mole = 6.02 × 10²³

Question 9

What is number 6.02 × 10²³ known as ?

Answer 9

Avogadro’s constant

Question 10

What is 6.02× 10²³ the number of ?

Answer 10

Number of atoms in a substance

Question 11

How do you calculate the mass?

Answer 11

Mass (g) = mole x Mr/Ar

Question 12

What is the equation for mole?

Answer 12

Mole = mass ÷ Mr/Ar

Question 13

If we know the mole of one thing what else do we know?

Answer 13

The moles of everything

Question 14

What is Ar the mass for?

Answer 14

Mass for atom

Question 15

What is Mr the mass for?

Answer 15

Mass for a molecule