Which of the following have the most similar properties? a. sodium (na) and magnesium (mg) b. carbon (c) and silicon (si) c. argon (ar) and chlorine (cl) d. potassium (k) and calcium (ca)

What is the percent by mass of oxygen in fe2o3

If blood contains 150g of hemoglobin per liter of blood, how much hemoglobin would be contained in 10 ml of blood

What happens when an atom of sulfur combines with two atoms of chlorine to produce sci2? a. each chlorine atom shares a pair of electrons with the sulfur atom. b. an electron is transferred from each chlorine atom to the sulfur atom. c. an electron is transferred from the sulfur atom to each chlorine atom. d. each chlorine atom shares all its valence electrons with the sulfur atom.