What determines the ratio of ions in an ionic compound? O A. The charges on the ions
O B. The period the atoms are in
O c. The electronegativity of each atom
D. The number of bonds formed

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.

What is the energy in joules of a mole of photons associated with visible light of wavelength 486 nm?

Which statement characterizes synthetic polymers? a. they come from animals and plants. b. they are found in nature. c. they are made in a lab. d. they are components of starch.