Why is the melting of ice a physical change? It changes the chemical composition of water. It does not change the chemical compo
2 answers:
Answer: It does not change the chemical composition of water.
Explanation:
A physical reaction is defined as the reaction in which a change in shape, size takes place. No new substance gets formed in these reactions.
There is no change in chemical composition.
Example : melting of ice
A chemical reaction is defined as the reaction in which a change in chemical composition takes place. A new substance is formed in these reactions by breaking of old and making of new bonds.
Example: Oxidation of magnesium leads to formation of white magnesium oxide and is a chemical change.
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6.349 g mass of anhydrous magnesium sulfate will remain.
<h3>What are moles?</h3>A mole is defined as 6.02214076 × 1023 of some chemical unit, be it atoms, molecules, ions, or others. The mole is a convenient unit to use because of the great number of atoms, molecules, or others in any substance.
Molar mass MgSO₄.7 H₂O = 246.52 g/mol
0.0527 moles
Molar mass MgSO₄ = 120.4 g/mol
Mass of anhydrous magnesium sulfate :
( 0.0527 x 120.4 ) => 6.349 g
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