A modest-sized house has an area of 165m^2. What is its are in km^2? Express ur answer in square kilometers to 3 significant figures.

Melting and boiling are endothermic processes. this means that these processes absorb energy from their surroundings in order to occur. use this information and the data you collected in the phase change gizmo to describe what happens to the temperature of water when you boil it, then explain why this result occurs.

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 ph of a solution that has a hydrogen ion concentration of 1.0 * 10 -9 m?