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Kryger [21]
3 years ago
6

Which of the following is most clearly an example of a physical change?

Chemistry
1 answer:
kaheart [24]3 years ago
7 0

Physical change is described as the change that affects the form of a chemical compound but not its chemical composition. It involves the change in physical properties.

When a solid is dissolved in the liquid the solid gets dissolved in the liquid there is no breakage in the bonds and same composition of the compounds are at the end of the change. When a solution changes colour due to the addition of an other substance the bonds are broken or formed between molecules or atoms. The substance with a certain set of properties is turned into different substance with different properties. Hence it is a chemical change.

Two liquids producing heat when mixed together results in the temperature change. The heat is produced due to the increase in the temperature. Hence it is a chemical change.

When two solutions are combined gas is released due to the temperature change. This is also a chemical change

Therefore the answer is A.

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The diagram shows an animal cell.
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Answer:

X  

Explanation:

Assume your diagram is like the one below.

X represents a mitochondrion.

That's where the Tricarboxylic Acid Cycle converts a single glucose molecule into six molecules of CO₂.

W is wrong. It represents a vacuole, which can store both nutrients and waste products for later elimination.

Y is wrong. It represents the nucleolus, which plays a critical role in the synthesis of ribosomes.  

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8 0
3 years ago
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Simora [160]

Answer:

2Zn + 2HCl = H2 + 2ZnCl

Explanation:

Zn is a metal, when metals have reaction with strong acid it will produce H2 gas and the metal's salt which is ZnCl.

Later on you just make the equation in balance.

4 0
3 years ago
How many atoms of oxygen are in 5Li2SO4
olga55 [171]

Answer:

20 oxygen atoms

Explanation:

Li2SO4 has 4 oxygen atoms, so if there are 5 of that compound then there will be 20 oxygen atoms.

8 0
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Valentin [98]

Answer:

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