CO2 NaCl
HCl

These may all be classified as
A) elements and compounds.
B) elements and molecules
C) elements and pure substances.
D) compounds and pure substances

Chlorophyll a had the molecular formula c55h72mgn4o5 how many atoms are in this molecule

The bone of a dinosaur and the imprint of a leaf are examples of which kind of fossils? a) index b) body c) amber d) trace

Which of the following is true about the products formed during photosynthesis? (5 points) select one: a. they have the same mass as the mass of reactants. b. they are the same set of compounds as the reactants. c. they have more mass than the mass of reactants. d. they are chemically the same as the reactants.