Ninety-nine percent of all the matter that can be observed in the universe exists as
a. gases.
b. plasmas.
c. liquids.
d. solids. reset selection
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Endeleev saw trends in the physical and chemical properties of elements when he organized them by

Select the correct answer how does the heat content of the reaction change in the process of photosynthesis when a glucose molecule is formed? ca the value of is negative the value of qis positive the value of a remains constant the value of a decreases the value of equals zero e

Correct relationship between molecular formula and empirical formula