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Answer:
Ionic
Explanation:
Magnesium hydroxide is an ionic compound and its formula is Mg(OH)2. An ionic bond is formed between two atoms when one is electron deficient and the other one is electron sufficient.
Here, Mg2+ is positively charged while OH- is negatively charged. Being oppositely charged strong ionic bonds are formed between these two elements.
An ionic molecule has high boiling and melting point and is stronger than molecules formed by covalent bonds.
Answer:
1.58× 10²² atoms of Au
Explanation:
Given data:
Mass of gold = 5.18 g
Number of atoms of gold = ?
Solution:
First of all we will calculate the number of moles of gold.
Number of moles = mass/molar mass
Number of moles = 5.18 g/196.96 g/mol
Number of moles = 0.0263 mol
Number of atoms:
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 atoms of Au
0.0263 mol × 6.022 × 10²³ atoms of Au / 1mol
0.158× 10²³ atoms of Au
1.58× 10²² atoms of Au
Answer:
Decomposers break down the dead organism and return the carbon in their bodies to the atmosphere as carbon dioxide by respiration
