Answer:
a. first-order in both A and B.
Explanation:
In order to determine the kinetics of reaction let us consider the given data
a) Doubling the concentration of B while keeping the concentration of A fixed doubles the rate of the reaction. : it means the reaction is first order reaction with respect to reactant B.
b) The half life is the time required to complete the reaction by half way.
As with time one half of A remains and after equal time one fourth of A remains it means again the order of reaction is first with respect to A also.
There is no effect on the half life if we are decreasing the initial concentration of A also.
Answer:
The answer to your question is the original dose of Ba-142 was 1184 μg
Explanation:
Data
Total time = 1.25 hours
The Final amount of Ba = 9.25 μg
The Half-life of Ba = 10.6 minutes
Process
1.- Convert total time to minutes
1 h ----------------- 60 min
1.25 h ------------ x
x = 75 min
2.- Draw a table of this process
Final amount of Ba Time
9.25 75 min
18.5 64.4 min
37 53.8 min
74 43.2 min
148 32.6 min
296 22 min
592 11.4 min
1184 0.8 min
Answer: With the first quarter moon, the Moon is "waxing", which means getting larger. with the third quarter moon, the Moon is "waning", which means getting smaller.
Explanation: In each case, the Moon is half lit ---- first quarter moon is when it is increasing and the third quarter moon is decreasing
Hope this helped! :)
<u>Reactivity</u><u> </u><u>series</u><u>:</u><u>-</u>
#1
Ag is found as too less reactive so
#2
No element in universe can displace potassium (K) from its solution as it's most reactive .
#3
Fe is also a reactive metal.
- Only Cupper is less reactive than it
So
#4
- Only Calcium can displace Mg
#5
- Mg and Ni can do ,Aurum(Gold) is least reactive so can't
#6
#7
#8
#9
#10
#11
As Ca is third most reactive metal
#12
M2= 0.35M
Formula: M1 • V1 = M2 • V2
1) 25.0mL • .500M = 35.5mL • (x)
2) 12.5 = 35.5 • (x)
3) 12.5/35.5 = x
4) 0.35211 = x = M2
Hope this helps!
