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What is a chemical change?

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A chemical change is a process where substances transform into different substances with new chemical properties, such as human digestion.

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What is a physical change?

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A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition, such as dissolving sodium hydroxide in water.

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What are the states of matter?

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The states of matter are solid, liquid, gas, and plasma. Each state has distinct properties and behaviors.

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What is an endothermic process?

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An endothermic process is a reaction or change that absorbs heat from the surroundings, resulting in a decrease in temperature.

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What is an exothermic process?

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An exothermic process is a reaction or change that releases heat to the surroundings, resulting in an increase in temperature.

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How many states of matter can exist simultaneously?

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Two or more states of matter can exist simultaneously under certain conditions, such as during phase transitions.

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What is the law of conservation of mass?

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The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction; it is conserved.

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What is density?

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Density is the mass of a substance per unit volume, commonly expressed in grams per milliliter (g/mL).

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What is the difference between a physical and chemical property?

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A physical property can be observed without changing the substance's identity, while a chemical property can only be observed during a chemical change.

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What is an example of a chemical change?

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An example of a chemical change is the rusting of iron, where iron reacts with oxygen to form iron oxide.