What is the mass number of a chlorine atom with 17 protons and 18 neutrons?

1 - O que são funções químicas?

Which takes more energy, removing an electron from an atom where the nucleus has a tight hold on its electrons, or a weak hold on its electron? Explain.

In the first law of thermodynamics, angle E = Q - W, what does Angle E stand for? A. The heat added to the system B. The internal energy of the system C. The work done by the piston D. The change in the internal energy of the system

A gaseous mixture contains nitrogen and helium with a pressure of 1 atomosphere. The total pressure in the container is 3 atmospheres. What is the partial pressure of the nitrogen?

A 3.8M solution of FeSO4 is diluted to eight times its original volume. What is the molarity of the diluted solution?

If some of the salt remains adhered to the weighing paper (and therefore is not transferred to the calorimeter), will the enthalpy of solution for the salt be reported too high or too low?

In one process, 5.95 kg of caf2 is treated with an excess of h2so4 and yields 2.45 kg of hf. calculate the percent yield of hf.

What are 3 ways to increase the solubility of a solid substance in a solid?

How many moles of CuSO4 are used to make 250 ml of a 0.50 M CuSO4 solution?

The decay constant of plutonium-239, a waste product from nuclear reactors, is 2.88*10-5year-1. part a what is the half-life of 239pu?