Which one of the following is a compound? sugar chocolate chip cookies oxygen salt water

why is water considered a pure substance and not a mixture?

water can be separated physically into hydrogen and oxygen.

water is clear.

water can be separated chemically into hydrogen and oxygen.

water is not a pure substance. it is a mixture.

how can a mixture of pigments be separated?

filtration

crystallization

magnetic attraction

chromatography

What are the genotypic and phenotypic ratios

Calculate the ratio of h+ ions to oh– ions at a ph = 7. find the concentration of h+ ions to oh– ions listed in table b of your student guide. then divide the h+ concentration by the oh– concentration. record this calculated ratio in table a of your student guide. compare your approximated and calculated ratios of h+ ions to oh– ions at a ph = 7. are they the same? why or why not? record your comparison in table a. what is the concentration of h+ ions at a ph = 7? mol/l what is the concentration of oh– ions at a ph = 7? mol/l what is the ratio of h+ ions to oh– ions at a ph = 7? : 1

What is the atomic mass of an atom that has 6 protons, 6 neutrons, and 6 electrons? a) 6 b) 8 c) + 1 d) 12 e) 18