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!
Explanation:
1 literThe total of water is equal to 1000.0 g of water
we need to find the molality of a solution containing 10.0 g of dissolved in Na₂S0₄1000.0 g of water
1. For that find the molar mass
Na: 2 x 22.99= 45.98
S: 32.07
O: 4 x 16= 64
The total molar mass is 142.05
We have to find the number of moles, y
To find the number of moles divide 10.0g by 142.05 g/mol.
So the number of moles is 0.0704 moles.
For the molarity, you need the number of moles divided by the volume. So, 0.0704 mol/1 L.
The molarity would end up being 0.0704 M
The molality of a solution containing 10.0 g of Na2SO4 dissolved in 1000.0 g of water is 0.0704 Mliter
Answer: Inhibitor
Explanation: Chemicals that slow down the reaction are called inhibitors.
Answer:
Identifying a need
Explanation:
Correct answer for APEX quiz.
Answer:
A atomic orbital is a mathematical function describing the location and wave-like behavior of an electron in an atom.
Explanation:
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