When an element exists in nature by itself, it must have a charge of

If the concentration of OH - in a sample of seawater is 2.0x10-6 M, then calculate the concentration of H3O and the pH. Classify the solution as acidic, basic, or neutral.

An example of an binary compound is

Which action best demonstrates the transformation of mechanical energy to heat energy to light energy? A) Striking a matchstick B) Squeezing a sponge ball C) Rubbing hands together vigorously D) Releasing a stretched spring

Based on the chemical equation, use the drop-down menu to choose the coefficients that will balance the chemical equation: () Li2O + ((*) H20 - (LiOH

How did Neptune change

A cube has a mass of 100 grams and it's density is determined to be 1g/cm^3. The volume of the cube must be

The oxide of titanium, TiO2 is used as a "whitener" in toothpaste. It is obtained from the ore iron (II) titanate, FeTiO3. What is the change, if any, in the oxidation number (oxidation state) of titanium in the reaction

What happened to the mars Climate Orbiter and why? How much money did NASA lose from this incident?

How many bonds are present in HCI? a) 1 b) 3 c) 4 d) 2

Determine the number of moles 1) 20g Na and 2) 34g H2O