Independent is what you physically change in the experiment. Does not change on its own.
Dependent is what happens as an effect of the independent.
Control variables are what stay the same thorough out the entire experiment.
<u>Answer:</u> The concentration of radon after the given time is
<u>Explanation:</u>
All the radioactive reactions follows first order kinetics.
The equation used to calculate half life for first order kinetics:
We are given:
Putting values in above equation, we get:
Rate law expression for first order kinetics is given by the equation:
where,
k = rate constant =
t = time taken for decay process = 3.00 days
= initial amount of the reactant =
[A] = amount left after decay process = ?
Putting values in above equation, we get:
Hence, the concentration of radon after the given time is
Answer:
Metals are tough because of an effect called plasticity
Explanation:
if you want to know more go to this site
https://en.wikibooks.org/wiki/A-level_Physics_(Advancing_Physics)/Metals#:~:text=Metals%20are%20tough%20for%20the,This%20effect%20is%20called%20plasticity.
Answer:
Part A
Part B
Explanation:
Part A
<em>The rate law is the equation that relates the rate of the reaction, the kinetic constant and the concentration of the reactant or reactants.</em>
For the given chemical reaction we can write a general expression for the rate law as follows:
where k is the rate constant and x is the order of the reaction with respect of N2O5 concentration. Particularly, <em>a first order reaction kinetics indicate that the rate of the reaction is directly proportional to the concentration of only one reactant</em>. Then x must be 1.
Replacing the value of the rate constant given in the text we can arrive to the following expression for the rate law:
Part B
Replacing the value of the concentration of N2O5 given, we can get the rate of reaction: