Question

Sodium and Chlorine combine to form table salt. Given the chemical reaction, how many grams of 2Na + Cl2 would be required to produce 4 grams of table salt?

Answer 1

So mass = mr * moles
Table salt -> NaCl, Mr = 23+35.5 = 58.5
4/58.5 = number of moles
Multiply the number of moles by 2 and then by 23 to find grams of Na
Multiply number of moles by 35.5*2 for the moles of chlorine gas.

Answer 2

Answer: The mass of
`2Na+Cl_2` required would be, 4 grams.

Step-by-step explanation:

Law of conservation of mass : It states that the mass can neither be created nor be destroyed but it can only be transformed from one form to another form.

This also means that total mass on the reactant side must be equal to the total mass on the product side.

The chemical equation for the reaction will be,

`2Na+Cl_2\rightarrow 2NaCl`

According to the law of conservation of mass,

Mass of reactant = Mass of product

Mass of
`2Na+Cl_2` = Mass of
`2NaCl`

Mass of
`2Na+Cl_2` = 4 grams

Hence, the mass of
`2Na+Cl_2` required would be, 4 grams.