Which statement about molecular orbitals is not true? Molecular orbitals result from the orbital contributions of all atoms within a molecule. Molecular orbitals, unlike atomic orbitals, do not involve radial probability densities because molecules are not spherical. Electrons within a molecule are best described as being in atomic, not molecular, orbitals. With molecular orbitals, we are concerned with the overall distribution (or densities) of electrons between the internuclear axes.

Answer asap need by wednesday morning explain how a buffer works, using an ethanoic acid/sodium ethanoate system including how the system resists changes in ph upon addition of a small amount of base and upon addition of a small amount of acid respectively. include the following calculations in your i. calculate the ph of a solution made by mixing 25cm3 0.1m ch3cooh and 40cm3 0.1m ch3coo-na+. [ka = 1.74 x 10-5 m] ii. calculate the ph following the addition of a 10cm3 portion of 0.08 m naoh to 500cm3 of this buffer solution. iii. calculate the ph following the addition of a 10cm3 portion of 0.08 m hcl to 200cm3 of the original buffer solution.

The fact that the total amount of energy in a system remains constant is a(n)

Afraction can be converted to a decimal by dividing the denominator into the numerator. use a calculator. divide to convert the fractions from part a to decimals. then describe the pattern you see in the decimal.