Can someone please help and I will mark you as brainlist!! 1) which of the following statements is NOT correct?

• coefficient is the number written in front of reactant and product in a chemical equation

• ideal gases follow the assumptions of the kinetic- molecular theory

• none of the above

• to find the volume of a gaseous reactant or product in a reaction, you must know at least one other gas involved in the reaction

2) which is INCORRECT after gasses

• all gas particles have some volume, however small, and are subject to intermolecular interactions

• most gases behave like ideal gases at wide range of temperature and pressure

• none of the above

• the collision that particles make with each other and the with the container are not perfect elastic

1) no. one of the above

2) the collision that particles make with each other and the with the container are not perfect elastic

the number of valence electrons for each molecule or ion is shown beneath the structure. remember hydrogen will not have more than two electrons. this hydrogen is part of a covalent bond (sharing two electrons). a double bond here would cause hydrogen to share four electrons with phosphorus.

a. energy is absorbed in the reaction.

if in a given reaction the energy of products is greater than the energy of reactants it means that reaction is endothermic and during the reaction, the energy is absorbed by reactants. in an endothermic reaction, the products have more stored chemical energy than the reactants. and in this reaction the reactants are more stable than products before the compounds with less energy are always more stable.