Which two body systems are most affected when a person is participating in a marathon running event? A. endocrine and digestive
B. Endocrine and muscular
c. skeletal and digestive
d. skeletal and muscular

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.

Why is silver chloride is an ionic compound

Element before carbon on the periodic table