The best and most correct answer among the choices provided by the question is the second choice. The activities in the ring of fire are mainly caused by t<span>he movement of mantle rock through the cracks between tectonic plates.</span> I hope my answer has come to your help. God bless and have a nice day ahead!
- The atomic mass of carbon is 12.011 g/mol.
- The atomic mass of hydrogen is 1.00794 g/mol.
This means the molar mass of CH is
Dividing the given molar mass by this,
This means the molecular formula is 
Answer:
25.89 × 10²³ molecules
Explanation:
Given data:
Mass of CoCl₂ = 560 g
Number of molecules present = ?
Solution:
Number of moles of CoCl₂:
Number of moles = mass/molar mass
Number of moles = 560 g/ 129.84 g/mol
Number of moles = 4.3 mol
Avogadro number:
The given problem will solve by using Avogadro number.
It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance. The number 6.022 × 10²³ is called Avogadro number.
1 mole = 6.022 × 10²³ molecules
4.3 mol × 6.022 × 10²³ molecules /1 mol
25.89 × 10²³ molecules
