Answer:
The age of the rock is 2.23x10⁹ years.
Explanation:
The age of the rock can be calculated using the following equation:
(1)
Where:
t: is the age of the rock =?
: is the half-life of ⁴⁰K = 1.248x10⁹ years
: is the quantity of ⁴⁰K in the sample = 281.8x10⁻⁹ mol
: is the quantity of ⁴⁰Ar in the sample = 7.25x10⁻⁹ mol
10.9%: is the percent of ⁴⁰Ar production by the decay of ⁴⁰K
By entering the above values into equation (1) we have:
Therefore, the age of the rock is 2.23x10⁹ years.
I hope it helps you!
Answer:
Mixtures
Explanation:
Matter can be classified as a compound and a mixture.
Answer:
Cells are the basic building blocks of living things.
Explanation:
So the answer is cells because it is composed of trillions of cells, all with their own specialised function. Cells are the basic structures of all living organisms.
I hope this helps you pass and humble yourself you will get to it, you got this!!!
Answer: 50%
Explanation: 50% or more of plant and animal species on Earth are found in tropical rainforests.