Chemical Formulas-1

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What is a chemical formula?

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A chemical formula is a way of expressing the composition of a substance using symbols for its constituent elements and numbers to indicate the quantity of each element.

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What does the subscript in a chemical formula indicate?

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The subscript in a chemical formula indicates the number of atoms of the element that are present in one molecule of the compound.

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What is the chemical formula for water?

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The chemical formula for water is H₂O, which indicates that each molecule contains 2 hydrogen atoms and 1 oxygen atom.

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How many atoms are in a molecule of carbon dioxide (CO₂)?

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A molecule of carbon dioxide (CO₂) contains 3 atoms: 1 carbon atom and 2 oxygen atoms.

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What is the chemical formula for sodium chloride?

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The chemical formula for sodium chloride is NaCl, which indicates that it is composed of one sodium atom and one chlorine atom.

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How many total atoms are in the formula C₆H₁₂O₆ (glucose)?

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The formula C₆H₁₂O₆ contains a total of 24 atoms: 6 carbon, 12 hydrogen, and 6 oxygen.

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What does the term 'molecule' refer to in chemistry?

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A molecule refers to a group of two or more atoms bonded together, representing the smallest fundamental unit of a chemical compound.

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What is the significance of the chemical formula in a chemical reaction?

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The chemical formula helps to identify the reactants and products in a chemical reaction, allowing for the understanding of the conservation of mass.

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How many hydrogen atoms are in the formula C₂H₆?

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There are 6 hydrogen atoms in the formula C₂H₆.

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What is the difference between an element and a compound?

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An element is a pure substance made of only one type of atom, while a compound is a substance formed when two or more different types of atoms bond together.