A laboratory analysis of vanillin, the flavoring agent in vanilla, determined the mass percent composition: c, 63. 15%; h, 5. 30%; o, 31. 55%. Determine the empirical formula of vanillin.

Layer r contains a well-known index fossil that is 100 million years old. based on this information and the principle of superposition, a. layers t and m are older than 100 million years, and layers x and g are younger than 100 million years. b. layers t, m, x, and g are all older than 100 million years. c. layers t and m are younger than 100 million years, and layers x and g are older than 100 million years.