Quantitative Chemistry

Question 1

What is RAM?

Answer 1

The atomic masses of all atoms in a compounds added together

Question 2

Porcentaje of mass equation

Answer 2

Atomic mass×number of atoms of element/Mr of compound

Question 3

What is Avogadro’s constant?

Answer 3

6.02×10^23

Question 4

Mole formula

Answer 4

Mole=Mass/Mr

Question 5

What is the conservation of mass?

Answer 5

Mass cannot be created or destroyed

Question 6

What happens when mass changes in a reaction?

Answer 6

• a gas is released
• one of the reactants is a gas present in the air

Question 7

What is a limitant reactant?

Answer 7

The reactant thats used up

Question 8

Volume of gas at room temp equation

Answer 8

Volume of gas=(mass/Mr)×24

Question 9

Concentration equation

Answer 9

Mass;(g)or number of moles/volume (dm^3)

Question 10

What is atom economy?

Answer 10

Percentage of reactants forming useful products

Question 11

Atom economy equation

Answer 11

(Relative mass of desired products/relative mass of all reactants)×100

Question 12

Why is a low atom economy not beneficial?

Answer 12

Reactions with low atom economy=use resources quickly=lots of waste=unsustainable+❌profitable
Reactions with one product=highest atom economy
More products=⬇atom economy

Question 13

Percentage yield equation

Answer 13

Percentage yield=(mass of product made/maximum theoritical mass) ×100