The number of protons plus the number of neutrons is the atom called what

What happens to the poh of an aqueous solution of ammonia when ammonium chloride is added?

For the following reaction 2 NO (g) + Cl2 (g) ⇋ 2 NOCl (g) The equilibrium concentrations of the gases at 1200°C are 0.026 M for NO, 0.596 M for Cl2, and 0.851 M for NOCl. Calculate the value of Kc.

Ght #of # of Element symbol | # of neutron Atomic mass proton electron or s Co A B 49 C 27 D 73 31 G H 58 115 181 | Ba-2 137 16 18 16

28. Explain the difference between the processes of melting and freezing?

A mixture of He , N2 , and Ar has a pressure of 13.6 atm at 28.0 °C. If the partial pressure of He is 1831 torr and that of Ar is 997 mm Hg, what is the partial pressure of N2 ?

What is the mass, volume, density, and substance for Block C:

Which factors affect electronegativity? A. Number of electrons and atomic radius B. Number of unshielded electrons and density of the element C. Atomic radius and number of unshielded protons D. Density of the element and atomic radius

What is the difference between an amide and an amine? And what is a substituted amide?

Balance the following chemical equation: / text{CH}_ 4 + CH 4 + start text, C, H, end text, start subscript, 4, end subscript, plus / text{O}_ 2 / rightarrow 2 →start text, O, end text, start subscript, 2, end subscript, right arrow / text{CO}_2 +

How did the invention of the spectroscope in 1859 change the science of chemistry