The mass of Calcium required to complete this reaction is 4.008 g.
- Law of conservation of mass states that In a closed system, mass cannot be produced or destroyed, but it can be changed from one form to another.
- The mass of the chemical constituents before a chemical reaction is equal to the mass of the constituents after the reaction.
- In several disciplines, including chemistry, mechanics, and fluid dynamics, the idea of mass conservation is widely applied.
In the given reaction mass of product after completion of reaction is 13.614 g that means total mass of constituents before reaction should also be 13.614.
So,
mass of Ca + mass of O₂ + mass of S = mass of CaSO4
Ca + 6.400 g + 3.206 g = 13.614 g
mass of Ca = 13.614 - 9.606 = 4.008 g
Therefore, by law of conservation of mass 4.008 g of Ca is required for the completion of the reaction.
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Answer:
See Explanation
Explanation:
Given
(a) to (d)
Required
Determine whether the given parameters can calculate the required parameter
To calculate either Density, Mass or Volume, we have



(a) 432 g of table salt occupies 20.0 cm^3 of space
Here, we have:


The above can be used to calculate Density as follows;



(b) 5.00 g of balsa wood, density of balsa wood : 0.16 g/cm^3
Here, we have:


This can be used to solve for Volume as follows:



(c) 32 cm^3 sample of gold density of 19.3 g/cm^3
Here, we have:


This can be used to calculate Mass as follows:



(d) 150 g of iron, density of Iron = 79.0 g/cm^3
Here, we have


This can be used to calculate volume as follows:


<em>Approximated</em>