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Andrews [41]
3 years ago
13

Which scenarios are examples of physical changes? Check all that apply.

Chemistry
2 answers:
lawyer [7]3 years ago
8 0

Explanation:

Physical change is a change that does not affect the chemical composition of a substance but it changes the physical appearance like size or shape of the substance.

For example, crushing a can, melting of ice, breaking a glass etc represents the physical change.

Scenarios which represent examples of physical changes are as follows.

  • Silicon is cut into tiny pieces for computer chips.
  • Lead is melted to form pellets.
  • Liquid water freezes to form ice.


Alona [7]3 years ago
3 0

Answer:

Lead is melted to form pellets

Explanation:

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Since for every O2 you can form 2 H2O, 0.75/2 = 0.375 mol of O2 will be needed to form 0.75 mol of H2O. 

Converting from moles to molecules:

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Molarity determines the molar concentration of the solute dissolved in the solution. Mass and volume should be measured for the estimation of the molarity.

<h3>What is molarity?</h3>

Molarity is the mass of the solute present in the litre of solution. It is also called molar concentration as it estimates the concentration of the compounds.

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