Find the density of mercury if 205ml has a mass of 2790 h; round your answer to the nearest 0.1 g/ml

The density of a substance is simply calculated as the ratio of mass over volume. That is:

density = mass / volume

 

Therefore calculating for the density of mercury:

density = 2790 g / 205 mL

density = 13.61 g / mL

 

Rounding off to the nearest  0.1 g / mL:

density = 13.6 g / mL

If a hydrogen atom is neutral, it must also have  one electron. an oxygen atom (o) has an atomic number of eight (8). this means a neutral oxygen atom has eight protons and eight electrons. the element actium (ac) has an atomic number of 89, so it has 89 protons and 89 electrons in a neutral atom

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