What are observations that indicate a chemical change has occurred?

True or false When water is ionized, it can act as either an acid or a base.

Calculate e0 for the spontaneous reaction when an ag+/ag half-cell (anode) is joined to an hg2+/hg half-cell (cathode).

Which statement justifies that hydrogen peroxide (H2O2) is a polar molecule? The O - H bond is nonpolar and the molecule is asymmetric. The O - H bond is nonpolar and the molecule is symmetric. The O - H bond is polar and the molecule is asymmetric.

A student listed three ways to predict if a bond is ionic. 1. A metal is bonded to a non-metal. 2. The electronegativity difference between the atoms is large. 3. Light elements form ionic compounds when bonded to heavy elements.

Most of the volume of an atom is occupied by

2) Which of the following is a true statement? A: All the atoms of an element must be identical. B: Compounds may be separated by physical means. C: Mixtures may not be separated. D: Homogeneous is one type of compound.

How to tell the difference between ionic and covalent bonding?

The combustion of propane may be described by the chemical equation C3H8 (g) + 5O2 (g) ⟶3CO2 (g) + 4H2O (g) C3H8 (g) + 5O2 (g) ⟶3CO2 (g) + 4H2O (g) How many grams of O2 (g) O2 (g) are needed to completely burn 83.3 g C3H8 (g) ?

Was the relationship among temperature, heat, and thermal energy?

What will most likely happen when a warmer air mass exists above a polar ice sheet? The temperature of the ice sheet will be lowered. Heat will be transferred from the air mass to the ice. The air mass will exert high pressure and rise upwards.