3 years ago

An atom's Lewis dot structure has four dots. Which of the following elements could it be, and why?

1 answer:

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Answer: The atom that it would be would be beryllium. This is because a Lewis dot structure counts the electrons. If there is four electrons, than there is 4 protons, unless it is a cation or anion. This means the atom has an atomic number of 4 and that element is beryllium.

Explanation:

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Sodium metal is sometimes used as a cooling agent in heat exchange units because of its relatively high molar heat capacity of 2

IgorC [24]

Answer:

The specific heat of sodium is 1,23J/g°C

Explanation:

Using the atomic weight of sodium (23g/mol) and the atomic weight definition, we have that each mole of the substance has 23 grams of sodium.

starting from this, we use the atomic weight of sodium to convert the units from J / mol ° C to J / g ° C

$28,2 \frac{J}{mol C} x \frac{1mol}{23g} = 1,23 J/g C$