How many electrons does sulfur have to gain to achieve a noble-gas electron configuration

Complete ionic, net and spectator ions for the following 1. ZnBr (aq) + AgNO3 (aq) 2. Ca (OH) 2 (aq) + Na2SO4 (aq) 3. Al (NO3) 3 (aq) + Na3PO4 (aq) 4. FeSO4 (aq) + Ba (OH) 2 (aq)

What is Calcium sulphate?

Liquid sodium is being considered as an engine coolant. How many grams of liquid sodium (minimum) are needed to absorb of energy in the form of heat if the temperature of the sodium is not to increase?

Why does the sun seen to rise and set

Which one of the following statements BEST explains what is meant by the "dual nature" of the electron? A : An electron may be either in a quasi-free state as in a metal or in a tightly-bound state deep within an atom.

Kool-Aid is made up of sugar (C6H12O6), food coloring, and water. It is an example of a (n) element heterogeneous mixture homogeneous mixture compound

A laboratory experiment requires 250 millimeters of water for boiling. It also requires 100 millimeters of water for a cooling process.

Which set of procedures and observations indicates a chemical change? A) Ethanol is added to an empty beaker and the ethanol eventually disappears. B) A solid is gently heated in a crucible and the solid slowly turns to liquid.

If 100 grams citric acid react with 100 g baking soda how many grams of carbon dioxide?

What state of matter undergoes changes in volume most easily? a. solidb. liquidc. gasd. frozen