Energy cannot be created nor destroyed, but it changes from one form to another. Hence, option C is correct.
<h3>What is energy?</h3>
Energy is the ability to do work.
In physics and chemistry, the law of conservation of energy states that the total energy of an isolated system remains constant; it is said to be conserved over time.
This law means that energy can neither be created nor destroyed; rather, it can only be transformed or transferred from one form to another.
Hence, option C is correct.
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Answer:
b. 4 fe + 3 O 2 --->
Explanation:
its simple please mark brainlnest
The answer is D. The final substance in Beaker X is a mixture and in Beaker Y is a pure substance.
The question tells us that the sugar is not visible. This is because it is soluble. The sugar has dissolved into the water, making the two a mixture. The sand, on the other hand, is not dissolved at all. The water and sand are two separate pure substances.
Answer:
D
Explanation:
There are 2 oxygens on the reactants side (OH)2 but 4 on the products side (2H2O). You cannot get 2 oxygens out of nowhere, so it is not balanced.
Answer:
The molar absorptivity coefficient is, 
.
Explanation:
Using Beer-Lambert's law :
Formula used :
where,
A = absorbance of solution
C = concentration of solution = 
l = path length = 2 cm
= incident light
= transmitted light
= molar absorptivity coefficient = ?
A compound absorb 90 % of the light and transmit 10% of light.
Transmittance = 10% = 0.1
Now put all the given values in the above formula, we get the molar absorptivity coefficient.
Therefore, the molar absorptivity coefficient is, .
