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Helen [10]
2 years ago
10

4 Identify Give an example of a physical change and an example of a chemical change.

Chemistry
1 answer:
AysviL [449]2 years ago
8 0

Answer:

Answer below

Explanation:

Physical changes dont change the chemical makeup of an object. An example would be to tear a piece of paper. Tearing the paper doesnt change how the paper was made chemically

Chemical changes on the other hand do change the chemical makeup of an object. An example of a chemical change would be to bake a cake. The reason being that the chemical makeup of the cake batter is changed so that the actual cake is formed.

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At a temperature of -25 °C, a sample of gas in a rigid container exerts a pressure of 55.8 kPa. At what temperature will the pre
never [62]
<h3>Given:</h3>

P_{1} = \text{55.8 kPa}

T_{1} = -25^{\circ}\text{C + 273 = 248 K}

P_{2} = \text{145 kPa}

<h3>Unknown:</h3>

T_{2}

<h3>Solution:</h3>

\dfrac{P_{1}}{T_{1}} = \dfrac{P_{2}}{T_{2}}

T_{2} = T_{1} \times \dfrac{P_{2}}{P_{1}}

T_{2} = \text{248 K} \times \dfrac{\text{145 kPa}}{\text{55.8 kPa}}

\boxed{T_{2} = \text{644 K}}

4 0
3 years ago
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Answer:

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Explanation:

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3 years ago
If sodium (Na) has 4 neutrons, 3 protons, and 2 electrons, which would be the correction symbol?
Alborosie

Answer:

Na+1

Explanation:

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3 years ago
What is the percent composition by mass of oxygen in Ca(NO3)2 (gram-formula mass=164 g/mol)?
natita [175]
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What is energy? Give some examples
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Answer: food is energy :>

Explanation:

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