1. Atoms, particles and stoichiometry

Question 1

Define a mole

Answer 1

A mole is the amount of a substance which contains the same number of chemical species (units), as there are atoms in exactly 12 g of the isotope carbon 12.

Question 2

What is the Avogadro´s constant?

Answer 2

Avogadro’s constant has a value of 6.023 X 1023 is has units as it is the number of particles per mole

Question 3

chemical reactions – products and substrates stoichiometry

Answer 3

Stoichiometry provides information on fundamental constraints = substrate conversion to product and cell mass from substrate.
Chemical equation provides a balance sheet which allows us to monitor these changes as reactants are transformed into products. The number of an atom must be the same on both sides