Why are the masses of some elements listed as whole numbers in parentheses?

What are two elements that form diatonic molecules held together by triple covalent bond?

The carbonates in an ore are converted into a mixture of zinc oxide and lead oxide. What's is the reaction and how is it done?

What element has three half filled orbitals in the 3p sublevel

Beryllium is a rare metal that is gray in color, strong, and lightweight. The following data was obtained from a calorimeter experiment: 5 sets of equations: m beryllium equals 10.1 grams. M water equals 38.8 grams.

A proton is a hydrogen atom without its electron? True False

A good way for someone to identify similar substances is to measure their densities true or false

At 25 ∘c, kp = 25 for the reaction h2 (g) + i2 (g) ⇌2hi (g). at equilibrium, the partial pressure of both h2 and i2 is 0.296 atm. what is the partial pressure of hi at equilibrium?

In a resonant hybrid of a molecule like CH3CO2-, how are the electron orbitals of the carbon in CO2 sp hybridized?

Consider the formation of nitrogen dioxide and oxygen: NO (g) + O3 (g) ⇌NO2 (g) + O2 (g) The reaction is first order in O3 and second order overall.

Iron has a density of 7.86 g/cm3. calculate the volume (in dl) of a piece of iron having a mass of 4.15 kg.