I think the answer is:
B. Chemical Change.
The energy that was released by the candy is calculates using the below formula
Q=Mc delta T
Q= heat energy
m= mass (500g)
C= specific heat capacity) = 4.18 j/g/c
delta t =change in temperature = 25- 21 = 4 c
Q= 500 g x 4.18 j/g/c x 4c = 8360 j
Well I assume it’s 20/4 which is 5
Answer:
<h3>The answer is 9.0 kg/L</h3>
Explanation:
The density of a substance can be found by using the formula
![density = \frac{mass}{volume} \\](https://tex.z-dn.net/?f=density%20%3D%20%20%5Cfrac%7Bmass%7D%7Bvolume%7D%20%20%5C%5C%20)
From the question
mass = 1.8 kg
volume = 0.2 L
We have
![density = \frac{1.8}{0.2} \\](https://tex.z-dn.net/?f=density%20%20%3D%20%20%5Cfrac%7B1.8%7D%7B0.2%7D%20%20%5C%5C%20)
We have the final answer as
<h3>9.0 kg/L</h3>
Hope this helps you