Is CH4 an element compound homogeneous or heterogeneous?
It is a compound and not a mixture because the amount of carbon and hydrogen are exactly fixed as one carbon atom and 4 hydrogen. This is called stoichiometry and it is why it is not called a mixture.
Is CH4 a compound or mixture?
Methane (US: , UK: ) is a chemical compound with the chemical formula CH4 (one carbon atom bonded to four hydrogen atoms). It is a group-14 hydride, the simplest alkane, and the main constituent of natural gas.
Is CH4 an element?
Methane (US: /ˈmɛθeɪn/, UK: /ˈmiːθeɪn/) is a chemical compound with the chemical formula CH4 (one carbon atom bonded to four hydrogen atoms)….Methane.
| Names | |
|---|---|
| Chemical formula | CH4 |
| Molar mass | 16.043 g·mol−1 |
| Appearance | Colorless gas |
| Odor | Odorless |
What type of pure substance is methane CH4 )?
Methane is a pure substance. A pure substance consists of a single type of particles such as atoms or molecules and not mixed up with other substances. A two or more pure substance are combined to form a Mixture.
How many valence electrons does ch4 have?
8
VSEPR calculation for methane, CH 4
| Valence electrons on central atom: | 4 |
| 4 H each contribute 1 electron: | 4 |
| Total: | 8 |
|---|---|
| Divide by 2 to give electron pairs | 4 |
| 4 electron pairs: | tetrahedral for the four shape-determining electron pairs |
Which statement is an identifying characteristic of a mixture?
1) A mixture can consist of a single element. 2) A mixture can be separated by physical means. 3) A mixture must have a definite composition by weight. 4) A mixture must be homogeneous.
Why is CH4 a compound?
Methane is a one-carbon compound in which the carbon is attached by single bonds to four hydrogen atoms.
Is CH4 ionic or covalent?
covalent compound
Methane, CH4, is a covalent compound with exactly 5 atoms that are linked by covalent bonds. We draw this covalent bonding as a Lewis structure (see diagram). The lines, or sticks, as we say, represent the covalent bonds. There are four bonds from a central carbon (C) linking or bonding it to four hydrogen atoms (H).
Is CH4 a pure substance because?
Methane is a pure substance because it always has the same composition. However, it is not an element because it can be broken down into simpler substances—carbon and hydrogen.