The concept of molecules:
a. helps model how the law of definite proportions might work.
b. proves the law of definite proportions.
c. is unrelated to the law of definite proportions.
d. violates the law of definite proportions.
e. supports the Aristotelian concept of four basic elements.
Question 2
What is the law of definite proportions?
a. All compounds have half as much of one element as they do of the other element in the compound.
b. Each chemical compound always contains the same elements in the same proportion by mass.
c. In any given compound, the ratio of the number of atoms of can vary from molecule to molecule.
d. All compounds have equal amounts of each element that composes them.
e. In any given compound, the ratios of the mass of the elements can vary widely.
Eye Model
Some of the many small molecules found in cells
Surface molecules involved in the interaction between an antigen-presenting cell and a CD4+ T cell.
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Phrenology model showing areas of the head overlaying brain regions that control different traits. I
Lac repressor protein binding. The crystal structural model of Lac repressor binding at lacO