Answer:
". It will mark the time since humans began altering Earth. Starting about 10,000 years ago, it is tentatively being called the Anthropocene."
i dont know if tht will help
3.6 x 10²⁴molecules
Explanation:
Given parameters:
Mass of Na = 275g
Unknown:
Number of molecules of Na₂O =
Solution:
Since sodium is the limiting reactant, we first use it to find the number of mole of the Na₂O and transpose it into finding the number of molecules.
Given equation:
4Na + O₂ → 2Na₂O
Since the equation is balanced, let us find the number of moles of Na;
Number of moles = 
= 
= 11.96moles
From the equation of the reaction;
4 mole of Na produced 2 moles of Na₂O
11.96 moles of Na will produce 
= 6moles
1 mole of a substance = 6.02 x 10²³ molecules
6 moles of Na₂O = 6 x 6.02 x 10²³ molecules = 3.6 x 10²⁴molecules
learn more:
Number of moles brainly.com/question/1841136
#learnwithBrainly
For every two molecules of water formed, one hydrogen atom is needed.
Answer: Option C.
<u>Explanation:</u>
The water particle is very simple and basic. A particle is a bit of issue that contains at least two iotas. The logical name for water is H2O. It is called H2O since it has two iotas of hydrogen (H) and one molecule of oxygen (O). There are a great many these atoms in a single drop of water.
A water molecule is formed when two atoms of hydrogen bond covalently with an atom of oxygen.
Answer: Absolute dating can be used to determine the exact age of the rock, and relative dating is used to compare the ages of rocks.
The determination of the exact age of the rock is done by using the properties of atoms. Radioactive atoms decay with specific half-life times, so the half-life of the radioactive atoms along with the measurement of the amounts of materials in the parent and the daughter rocks permits to determine the age of the rock.
