In the given question, melting cheese is a type of physical change.
A physical change is defined as a change in the physical properties of a substance, such as its shape, size, or state, without changing its chemical composition.
When cheese is melted, it changes from a solid to a liquid state, but its chemical composition remains the same. The molecules in the cheese are simply rearranged as it is heated, causing it to melt.
Therefore, melting cheese is a physical change. This is because the cheese changes from a solid to a liquid state, but its chemical composition remains the same.
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Valence electrons are the electrons that reside in an atom's outermost shell. The role of valence electrons in determining an atom's reaction makes them crucial. You can count how many electrons are at the highest energy level by writing an electron configuration.
How do the valence electrons function?
The electrons in an atom's outermost shell are called valence electrons. … Because the electrons in the outermost shells of two atoms are the first to come into contact with one another and are the ones that control how an atom will react in a chemical reaction, when two atoms interact.
The outer-shell electrons of an atom are known as valence electrons. The valence electrons in an atom control its reactivity.
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Answer:
75mL
Explanation:
Data obtained from the question include:
C1 = 2M
V1 =?
C2 = 0.60M
V2 = 250mL
The original volume of solution can be obtained as follows:
C1V1 = C2V2
2 x V1 = 0.6 x 250
Divide both side by 2
V1 = (0.6 x 250) / 2
V1 = 75mL
The volume needed is 75mL
b. Pampas
C. Llanos
d. Serengeti
Answer:
Answer is B Pampas
Explanation:
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