The answer is chemical weathering .
Chemical or Nuclear. Probably, Chemical.
Answer:
CaO - inorganic
C₂H₄(OH)₂ - organic
Ca(OH)₂ - inorganic
CH₄ - organic
NaCl - inorganic
C₃H₈ - organic
Explanation:
Organic compounds have carbon (C) in it.
For example, CaO has calcium and oxygen, but no carbon so it's an inorganic compound. However, C₂H₄(OH)₂ does have carbon, making it an organic compound.
Answer:
151 g/mol
Explanation:
In order to solve this problem we need to keep in mind the formula for the <em>boiling point elevation</em>:
Where:
- ΔT is the temperature difference between the boiling point of the solution and that of pure water. 100.37 °C - 100.00 °C = 0.37 °C.
- <em>m</em> is the molarity of the solution
- i is the van't Hoff factor. As the solute is a nonelectrolyte, the factor is 1.
Input the data and <u>calculate </u><em><u>m</u></em>:
- 0.37 °C = 0.51 °C/m * <em>m</em> * 1
We now can <u>calculate the number of moles of the substance</u>, using the <em>definition of molarity</em>:
- molarity = moles of solute / kg of solvent
In this case kg of solvent = 90.0 g / 1000 = 0.090 kg
- 0.72 m = moles / 0.090 kg
Finally we <u>calculate the molar mass</u>, using the <em>number of moles and the mass</em>:
- 9.81 g / 0.065 mol = 151 g/mol
Answer : The symbol of the element is Selenium (Se).
Explanation :
Electronic configuration is distribution of electrons in an atom in atomic orbitals.
The electronic configuration of [Kr] =
Total number of electrons in [Kr] = 36
Due to -2 charge, 2 electrons are withdrawn from the electronic configuration of [Kr].
Now the total number of electrons left = 36 - 2 = 34
And the Selenium[Se] is the element which has 34 number of electrons.
Electronic configuration of [Se] =