What is the difference between mass and substance?

Answer 1

In chemistry, mass is a measure of the amount of matter in an object. For example, a person may have a mass of 55 kg.

A substance is a material with a constant chemical composition and characteristic properties. Water is a chemical substance.

You might say, for example, that 250 mL of water has a mass of 250 g.

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Answer 2

Serenity Allen

Mass refers to the amount of matter in an object, typically measured in kilograms. Substance, on the other hand, refers to the specific type of matter that makes up an object or substance, characterized by its chemical composition and properties. While mass is a quantitative measure, substance is a qualitative descriptor of the material.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.