Which pair of elements has the most similar properties? C. Be and Ba
D. Li and Be
B. Na and Ca
A. H and Mg

In a water molecule, hydrogen and oxygen are held together by a(an) bond. a) double covalent b) ionic c) nonpolar covalent d) hydrogen e) polar covalent

What is the empirical formula of c6h18o3? ch3o c2h5o c2h6o c2h5o5

A50.0 ml sample of gas at 20.0 atm of pressure is compressed to 40.0 atm of pressure at constant temperature. what is the new volume? 0.0100 ml 0.325 ml 25.0 ml 100. ml