Explanation:
Stoichiometry is the quantitative study of the mass relation of reactants and products in a chemical reaction to determine the amount of reactant required for a reaction to produce a specified quantity or to determine the theoretical yield for the products.
The mole is an SI base unit to measure the amount of elementary entities (atom, molecules, ions, electrons, particles, etc.) of a given mass of a particular substance. One mole is the quantity of a substance exactly equal to Avogadro's number which is approximately 6.022
.
For a stoichiometric calculation for gram-to-mole conversion, the conversion follows the relation
,
where
is the number of moles of a given substance,
is the mass of the substance and
is the molecular weight of the substance.
Given that the substance of interest is sodium chloride, NaCl, the molecular weight of the compound is
,
where
is the atomic mass of the element.
Therefore, the number of moles of sodium chloride is

Answer:

Explanation:
Halogens are elements in group 17 or 7 in the periodic table.
Iodine is a halogen.
<em>A glass flask of volume 400 cm³ is just filled with mercury at 0°C. How much mercury will overflow when the temperature of the system rises to 80°C.</em>
<em />
The volume of mercury that overflow is 5.376 cm³
<h3>Further explanation</h3>
Given
volume of glass = 400 cm³
Δt=80 °C - 0 °C = 80
Required
overflow volume
Solution
With an increase in the temperature of the substance, objects can expand. This expansion includes volume expansion.
Can be formulated

Find volume expansion of glass and mercury


Overflow :
ΔV mercury - ΔV glass : 5.76-0.384 = 5.376 cm³