5 Questions
Name two oxides of nitrogen and state the law of chemical combination illustrated by these compounds. Who proposed this law?
NO and NO2. The law illustrated by these compounds is the Law of Multiple Proportions. This law was proposed by John Dalton.
State the Law of Definite (Constant) Proportion and who proposed this law?
The Law of Definite (Constant) Proportion states that a given compound always contains exactly the same proportion of elements by weight. This law was proposed by Joseph Proust.
State the Law of Conservation of Mass (Matter) and who proposed this law?
The Law of Conservation of Mass (Matter) states that matter can neither be created nor destroyed. This law was proposed by Antoine Lavoisier.
What is the Law of Multiple Proportions and who proposed this law?
The Law of Multiple Proportions states that when two elements combine to form more than one compound, the different masses of one of the elements that combine with a fixed mass of the other are in a simple whole number ratio. This law was proposed by John Dalton.
What is the Law of Definite (Constant) Proportion and who proposed this law?
The Law of Definite (Constant) Proportion states that a given compound always contains exactly the same proportion of elements by weight. This law was proposed by Joseph Proust.
Study Notes
Laws of Chemical Combination
- Two oxides of nitrogen are nitrogen dioxide (NO2) and nitrous oxide (N2O)
- These compounds illustrate the Law of Chemical Combination, which states that a given compound always contains the same proportion of elements by mass
- French chemist Joseph Proust proposed this law in 1799
Law of Definite (Constant) Proportion
- States that a chemical compound always contains the same proportion of elements by mass
- Proposed by Joseph Proust in 1799
Law of Conservation of Mass (Matter)
- States that matter cannot be created or destroyed in a chemical reaction, only transformed from one substance to another
- Proposed by Antoine Lavoisier in 1785
Law of Multiple Proportions
- States that if two elements form multiple compounds, the masses of one element that combine with a fixed mass of the other element are in a simple whole-number ratio
- Proposed by John Dalton in 1803
Test your knowledge of chemistry with this quiz on the Law of Multiple Proportion. Learn about NO and NO2, two oxides of nitrogen, and the scientist who proposed this important law of chemical combination. Join now to challenge yourself and expand your understanding of basic concepts in chemistry.
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