Answer
512kj/mole
Explanation:
What is the work function of gold metal in kJ/mol if light with λ = 234 nm is necessary to eject electrons?
The energy can be calculated using below expresion;
E = hc/λ
Where h= planks constant= 6.626 x 10^-34
c= speed of light= 3 x 10^
λ= wavelength
hc= (6.626 x 10^-34 x 3 x 10^ 8)
=
The scenario that contains an exact number is 'A) You count 10 people in a room' (Option A).
<h3>What is the exact number?</h3>
An exact number can be considered a discrete variable because it does not involve a continuous range of values in a given measurement.
In conclusion, the scenario that contains an exact number is 'A) You count 10 people in a room' (Option A).
Learn more about discrete variables here:
brainly.com/question/16044695
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Awnser: The awnser is cloudy
Explanation: I don't have an explanation I just know it
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
