A substance of definite composition by weight consists of atoms of two or more different elements is called as:
Correct answer: A. Compound
- A. Compound
- B. Element
- C. Mixture
- D. Solution
Explanation
This is the correct answer. A compound is a pure substance made up of two or more different elements chemically combined in a fixed ratio. The properties of a compound are different from the properties of its constituent elements. Examples of compounds include water (H2O), carbon dioxide (CO2), and sodium chloride (NaCl).
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About Fundamental Concepts of Chemistry
Mole calculations connect mass, number of particles and Avogadro's number, while balanced equations provide the mole ratios used in stoichiometry. Questions cover limiting and excess reactants, theoretical yield and percentage yield, including identifying which reactant is consumed first and comparing the actual product with the maximum possible product.
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