What is A change in which one or more substances are converted into a new substance

Based upon elemental analysis, the empirical formula for an unknown compound was calculated to be CH2. Mass spectrometry analysis reveals the compound to have a molar mass of approximately 42 g/mol. What is the molecular formula for the compound

What do chloroplasts do

Which dissolves better in water salt sugar or baking soda science project?

Mechanical waves that travel through a. a vacuum b. outer space c. a black hole d. a medium

Suppose that you are given two unlabeled beakers. One beaker contains water, and the other beaker contains a solution of ethanol and water. How could you safely determine which beaker contains just water?

Why are most household items made up of oxygen?

How many valence electrons does aluminum oxide have

How many grams of nh3 can be produced from 4.08 mol of n2 and excess h2. express your answer numerically in grams?

For the reaction represented by the equation 2na + cl2® 2nacl, how many grams of chlorine gas are required to react completely with 2.00 mol of sodium?

Transuranium elements are elements larger than uranium that are produced via transmutation. a. True b. False