Is na2S an ionic compound, covalent compound, or acid

If an atom has three protons three neutrons and two electrons what is the electrical charge of the atom

The saber toothed cat fossil is found i layer g this finding indicates that layers h and i must have formed during what time

4.80 x 10^25 formula units pf calcium iodide (Cal2) will have what mass?

Given the following equation: 2F2 + 2H2O = 4HF + O2 What mass of fluorine is needed to completely react with 3.6 grams of water? Molar mass of F2 = 38.00 g/mol Molar mass of H2O = 18.02 g/mol

Consider the statement: "The temperature of the land is an important factor for the ripening of oranges, because it affects the evaporation of water and the humidity of the surrounding air.

2 human activities that contribute to runoff into water systems

Which of the following is an example of geographic isolation? A. a population of salmon dies out because they cannot find food. B. a zebra with a long mane moves into a population of zebras with short manes. C.

What are moles in chemistry?

How did John dalton describe atoms?

Which of the following statements describes a physical property? The substance has a higher density than water. A. The substance forms a solid when reacted with silver nitrate. B. The substance is highly reactive. C.