1. How many molecular orbitals can be built from the valence shell orbitals in O2?

Structure of the atoms: discovery of the nucleus in 1909i need answering all of these questions

Consider a culture medium on which only gram-positive organisms such as staphylococcus aureus colonies can grow due to an elevated nacl level. a yellow halo surrounds the growth, indicating the bacterium fermented a sugar in the medium, decreasing the ph as a result and changing the color of a ph indicator chemical. this type of medium would be referred to as a differential and enrichment culture.

How many atoms or molecules are there in a mole of a substance?