What is the total number of moles of hydrogen gas contained in 9.03 x 10²³ molecules?

If the early atmosphere of the earth was composed of carbon dioxide, why does the present atmosphere contain oxygen molecules?

List four possible clues to a chemical change

Many people are proponents of using nuclear power instead of burning coal to generate electricity. What is an environmental advantage of using nuclear power? A) Radioactive uranium would be taken from the earth.

Structures with oh tend to form what kinds of bonds

Write a balanced equation for the dissolution of sodium carbonate (Na2CO3) in water. Find the number of moles of Na + produced when 0.207 mol of sodium carbonate dissolves.

The flame from my candle gives off black smoke heat and light what type of changes do these indicate

Which one of the following processes results in a decrease in the number of neutrons? corrosion electron capture gamma emission positron emission alpha emission

Calculate the root mean square velocity of F2, Cl2, and Br2 at 304 K.

The total pressure inside a 1.62 cylinder kept at 35°C is 1.15 atm. If the volume of the cylinder drops to 0.74 L and the temperature remains the same, what is the new pressure inside the cylinder?

What is difference between tempering and aging?