5 is 2 I’m not sure about 4 though....
Answer : The final concentration of
is, 2.9 M
Explanation :
Expression for rate law for first order kinetics is given by:

where,
k = rate constant = 
t = time passed by the sample = 3.5 min
a = initial concentration of the reactant = 3.0 M
a - x = concentration left after decay process = ?
Now put all the given values in above equation, we get


Thus, the final concentration of
is, 2.9 M
Carbon is the one and only element to make a molecule organic.
Answer: A = 1560
B = 1.6
Explanation: brainlest please
Answer:
like how do you need help