If the mystery element Unknownium has 4 isotopes, Un-504, Un-501, Un-503, and Un-506. The relative abundance of Un-504 is 25%, Un-501 is 15%, Un-503 is 20% and Un-506 is 40%. Calculate the average atomic mass. a
505.2
b
503.7
c
504.15
d
506.01

Which answer lists the fundamental forces in order from strongest to weakest

Complete the sentence. the lower the hydrogen ion concentration, the the ph. higher lower closer to 7 closer to 0

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.