Which among the given combinations below represent a set of isotopes? 1.40 protons and 40 neutrons
II. 41 protons and 39 neutrons
3.42 neutrons and 48 protons
4 40 protons and 42 neutrons
V. 41 protons and 40 neutrons

A. I, II, III
B. III, IV
C.1, IV and II, V
D. 1, V and II. V
E.1. V

Look for the ones with the same number of protons and different neutrons number

consider the reaction below.

 no rx

at 500 k, the reaction is at equilibrium with the following concentrations.

[pci5]= 0.0095 m

[pci3] = 0.020

[ci2] = 0.020 m

what is the equilibrium constant for the given reaction?

0.042

0.42

2.4

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