Which statements are true of fossil fuels? check all that apply. a. the burning of them contributes to global warming. b. they will never run out. c. they come from decayed organic material. d. they burn very cleanly, creating almost no dangerous waste.

The covalent compound acetylene, which is the fuel of the oxyacetylene torch used by welders, has the molecular formula c2h2. the covalent compound benzene, a commercial solvent, has the molecular formula c6h6 each of these covalent compounds contains carbon and hydrogen atoms in a one-to-one ratio. would it be correct to write the chemical formulas of each as ch? explain.

How do you lengthen a pattern piece? (family and consumer science, sewing)

Which type of fossil does this image depict?