Brass is made up of copper (density = 8.96 g/cm3) and zinc (density = 7.13 g/cm3). If the density of brass is 8.36 g/cm3 what is the percentage of copper and zinc?

a electronegativity decreases beacuse the size of nucleus is bigger.

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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