How are the valence electrons organized to form a bond between the atoms

I need to find the amount of molecules in 4.5g of water. I only want to check my answer: 1.505 * 10^22 right?

In a laboratory experiment, the reaction of 3.0 mol of H2 with 2.0 mol of I2 produced 1.0 mol of HI. Determine the theoretical yield in grams and the percent yield for this reaction.

Which element has the least metallic character among Li, Be, Na and Mg

How much energy (in JJ) is lost when a sample of iron with a mass of 29.2 gg cools from 79.0 ∘C∘C to 27.0 ∘C∘C?

Which of the following would likely be part of an ionic bond? Choose all that apply. A. K+1 B. Cl2 C. F-1 D. Ne

Sodium chloride was dissolved in water to produce a 1.5M solution. Explain what this concentration tells us about the NaCl solution. How might a chemist use this ratio?

A gas is contained in a 5.0-liter container at a pressure of 100 kPa. What size container would be required to contain the gas at a pressure of 50 kPa, assuming the temperature remains constant?

Select the correct answer. What is the chemical name of the covalent compound p4S3 A. tetraphosphate trisulfide B. triphosphate tetrasulfide tetraphosphorus trisulfide D. quadriphosphide trisulfur E. quadriphosphorus trisulfide Reset

A student doing this experiment obtained the data shown in the table above. The value of the constant, k, for this data is

A fuel scientist burnt a piece of coal and a piece of wood to compare the amount of heat given off by each.