Does a compound have a fixed mass ratio?
Table of Contents
- 1 Does a compound have a fixed mass ratio?
- 2 Is a compound composed of two or more elements in a fixed ratio?
- 3 What is a fixed mass ratio?
- 4 Why do elements combine in a fixed ratio?
- 5 When a substance is made of 2 or more elements?
- 6 What makes a compound pure?
- 7 What does a compound consist of?
- 8 What is true and false about mixtures?
Does a compound have a fixed mass ratio?
In chemistry, the law of definite proportion, sometimes called Proust’s law, or law of constant composition states that a given chemical compound always contains its component elements in fixed ratio (by mass) and does not depend on its source and method of preparation.
Are elements of compounds in a fixed ratio?
Like water, all compounds consist of a fixed ratio of elements. It doesn’t matter how much or how little of a compound there is. It always has the same composition. Q: Sometimes the same elements combine in different ratios.
Is a compound composed of two or more elements in a fixed ratio?
Compounds. Compounds are made up of two or more elements and they consist of fixed ratio of chemically bonded atoms. A compound is a pure substance. Atoms are smallest particles of matter that can enter into chemical reaction.
Is a compound a pure substance True or false?
A compound is a pure substance composed of two or more different atoms chemically bonded to one another. A compound can be destroyed by chemical means. It might be broken down into simpler compounds, into its elements or a combination of the two.
What is a fixed mass ratio?
A fixed mass of carbon, say 100 grams, may react with 133 grams of oxygen to produce one oxide, or with 266 grams of oxygen to produce the other. The ratio of the masses of oxygen that can react with 100 grams of carbon is 266:133 = 2:1, a ratio of small whole numbers.
What is the ratio of elements in a compound?
Formulas for Ionic and Covalent Compounds
| Name of Compound | Type of Compound | Ratio of Ions or Atoms of Each Element |
|---|---|---|
| Calcium iodide | ionic | 1 calcium ion (Ca2+) 2 iodide ions (I-) |
| Hydrogen peroxide | covalent | 2 hydrogen atoms (H) 2 oxygen atoms (O) |
| Carbon dioxide | covalent | 1 carbon atom (C) 2 oxygen atoms (O) |
Why do elements combine in a fixed ratio?
Atoms cannot be created or destroyed. Atoms of different elements may combine with each other in a fixed, simple, whole number ratios to form compound atoms. Atoms of same element can combine in more than one ratio to form two or more compounds.
Is compound composition fixed?
A compound cannot be separated into its components by physical methods. The properties of a compound are entirely different from those of its constituent elements. The composition of compound is fixed, the constituents are present in a fixed proportion by mass. Compound is a homogeneous substance.
When a substance is made of 2 or more elements?
Compound : A substance made of two or more elements that are chemically combined in fixed amounts.
What is fixed and definite composition?
The Law of Definite Composition: In different samples of any pure compound, elements combine always in the same, fixed, proportions by mass. compound has some definite mass composition].
What makes a compound pure?
Compounds are made of only one kind of molecule. The molecule is made up of two or more kinds of atoms. There is no physical change that can separate the compounds into more than one kind of substance. This makes a compound a pure substance.
Are elements and compound pure substances?
Elements and compounds are both examples of pure substances. A substance that can be broken down into chemically simpler components (because it has more than one element) is a compound. For example, water is a compound composed of the elements hydrogen and oxygen.
What does a compound consist of?
Science ChemistryQ&A LibraryA compound consists of elements combined in a fixed ratio. True or False A compound consists of elements combined in a fixed ratio. True or False
What is the difference between a mixture and a compound?
In a mixture the substances involved (can/cannot) be separated by a simple physical process. can In a compound the elements involved (can/cannot) be separated by a simple physical process because the elements are (physically combined/chemically bonded). cannot, chemically bonded True or False: An element can be broken down into a simpler substance.
What is true and false about mixtures?
True of False: A mixture is always made up of a combination of elements False In a mixture, the substances (lose/ retain) their identities retain In a mixture the substances involved (can/cannot) be separated by a simple physical process.
Why can’t elements in a compound be separated by simple physical processes?
In a compound the elements involved (can/cannot) be separated by a simple physical process because the elements are (physically combined/chemically bonded).