Calculate the density of a rock if it has a mass of 498g and a volume of 11.9 mL.
1 answer:
Answer:
<h2>Density = 41.8 g/mL</h2>Explanation:
The density of a substance can be found by using the formula
<h3>From the question
mass = 498 g
volume = 11.9 mL
Substitute the values into the above formula and solve for the Density
That's
<h3>We have the final answer as
<h3>Density = 41.8 g/mL</h3>Hope this helps you
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<u>Answer:</u> The for the reaction is 51.8 kJ.
<u>Explanation:</u>
Hess’s law of constant heat summation states that the amount of heat absorbed or evolved in a given chemical equation remains the same whether the process occurs in one step or several steps.
According to this law, the chemical equation is treated as ordinary algebraic expressions and can be added or subtracted to yield the required equation. This means that the enthalpy change of the overall reaction is equal to the sum of the enthalpy changes of the intermediate reactions.
The chemical equation for the reaction of carbon and water follows:
The intermediate balanced chemical reaction are:
(1)
( × 2)
(2)
( × 2)
(3)
The expression for enthalpy of the reaction follows:
Putting values in above equation, we get:
Hence, the for the reaction is 51.8 kJ.