What are the parts that make up h2o?

An atom of oxygen is in an excited state. When an electron in this atom moves from the third shell to the second shell, energy is (1) emitted by the nucleus (2) emitted by the electron (3) absorbed by the nucleus (4) absorbed by the electron

If the o2 is collected over water at 25 c (298 k) and 724.0 mm hg total pressure, how many mols o2 will a 1.00 l sample of collected gas contain?

A glass cylinder contains four liquids in four separate layers. One liquid is water. Water's density is 1 g/mL. The purple liquid has a density of 1.62 m/mL. The yellow liquid has a density of 0.46 g/mL. The red liquid has a density of 0.91 g/mL.

Which of these take place during a chemical change

What is true about the elements of a period? They have the same number of electron shells. They have similar chemical characteristics. They have similar physical characteristics.

How many Joules are there in 55 nutritional calories?

What is the half-life (in seconds) of a zero-order reaction which has an initial reactant concentration of 0.834 m with a k value of 5.42 * 10-2 m/s?

58. Explain why each successive ionization of an electron requires a greater amount of energy. (6.3)

Define Average speed

Is the equation 3Br2+2Ga 2GaBr3 which of the following is not true