Answer: It was obtained 8515 years ago
Explanation:
Expression for rate law for first order kinetics is given by:
where,
k = rate constant
t = age of sample
a = let initial amount of the reactant
a - x = amount left after decay process
a) to find the rate constant:
Half life is the amount of time taken by a radioactive material to decay to half of its original value.
b) for completion of 36% of reaction
t = 8515 years
The time was 8515 years.
Explanation:
The atmosphere is the gaseous envelope round the earth.
The biosphere is the part of the earth dominated and occupied by living organisms.
As with other spheres of the earth, the biosphere and atmosphere are constantly interacting too.
- Organisms breathe in air to their respiration processes.
- Weather elements are conditioned by the atmosphere.
- Decomposition of organisms release gases back into the atmosphere.
learn more:
Biogeochemical cycle brainly.com/question/4217448
#learnwithBrainly
Answer:
This structure provides support and protection for plant cells = Cell Wall
This is a large, central fluid-filled structure that provides turgidity = Vacuole
A thin semipermeable barrier around the cell which regulates what enters and leaves the cell = Cell membrane
The control center of the cell = Nucleus
It is often described as the cells Power Plant = Mitochondria
This is used by plant cells for photosynthesis = Chloroplast
Hope this helps :)
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Explanation:
The giant blue thing is the vacuole
The thin yellow line is the cell membrane
The yellow and orange ball is the nucleus
The light green thing with zig zag lines is the mitochondria
The dark green thing inside the cell is the chloroplast
The thing outside the cell is the cell wall its green
C. Half shaded and half white.
