Independent Variable: a variable that you can change in an experiment
Dependent Variable: something that changes as you change the independent variable
control variable: something that is not changed throughout the experiment
Possibly C or D i wanna say sorry if i’m wrong
Answer: B
Explanation:
Graph 1 represents an endothermic reaction, Graph 2 represents an exothermic reaction.
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So for D you have to find energy right
from c you get wavelength Lambda
so on D use this
E = Hc / lambda
c is given 1.5 x 10 ^20
h = 6.624 x 10^-34
and then you get answer for energy
I think its density is 850kg/m^3