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May 6, 2024 · An example of a chemical reaction is the burning of methane in the presence of molecular oxygen (O 2) to form carbon dioxide (CO 2) and water. CH 4 + 2O 2 → CO 2 + 2H 2 O In this reaction, which is an example of a combustion reaction , changes occur in the way that the carbon, hydrogen, and oxygen atoms are bound together in the compounds.
The basic composition of a compound can be indicated using a chemical formula. A chemical formula uses symbols from the periodic table to indicate the types of elements present in a particular compound while using subscripts to represent the number of each type of element present.
- Here, electrons and protons are depicted using spheres. But in reality, protons and electrons aren't...It makes sense for protons and electrons to be spheres since the shape would allow the mass of the particles to be evenly distributed from all side...
- when NaCl crystal dissolves in water , what happens to it? what happens to electrostatic attraction ...The electrostatic attraction between the Na⁺ ions and the Cl⁻ ions is still there. But the attractions between these ions and water molecules is gr...
- How does bonding (covalent vs ionic) determine the properties of a substance?Do you know what properties from these bonds make that happen ? I remenber seeing in another video that intermolecular h-bonds typically make for h...
- Is it possible for a molecule to lose all of it's electrons? Hydrogen for example?Absolutely, and hydrogen often makes a hydrogen ion (H+) which consists of only a proton
- Is there a limit to the number of electrons atoms can have, or is it specific to each element?Each shell is limited to the number of electrons per subshell: The first shell consists of an s-orbital, and so it will have max 2 electrons. The s...
- Does the bond really exist and you can observe, or its a only an illustration of a kind of force wit...The bonds exist as electromagnectic atractions that tend to hold the molecule together. They can be measured through spectroscopy with infrared, ul...
- In the "Ion and formation" part, can every elements form an ion?Elements tend to try and reach more stable electronic distribuitions, therefore they can loose or win electrons, forming ions, not all elements for...
- I still don't understand how there is no such thing as a molecule of an ionic compound. Earlier in t...Molecules are defined as two or more atoms connected by *covalent* bonds. That might seem arbitrary (especially since covalent and ionic bonds are...
- I have this question since the beginning and unfortunately nothing seems to clarify it. What is the ...Molecules consist of two or more atoms bonded together. Compounds are molecules with two or more different elements.
Jul 12, 2023 · 3.3: Composition of Chemical Compounds. 2 × (1.0079 amu) + 1 × (15.9994 amu) = 18.01528 amu. If a substance exists as discrete molecules (as with atoms that are chemically bonded together) then the chemical formula is the molecular formula, and the formula weight is the molecular weight.
Oct 15, 2023 · A chemical is a substance with a specific composition. It is an element, an alloy, or a compound made up of two or more elements combined in a fixed ratio. For instance, water (H 2 O) is a chemical because it consists of hydrogen and oxygen combined in a 2:1 ratio. All matter either is a chemical or else consists of chemicals.
98026. Chemical composition refers to the arrangement, type, and ratio of atoms in molecules of chemical substances. Chemical composition varies when chemicals are added or subtracted from a substance, when the ratio of substances changes, or when other chemical changes occur in chemicals.
A chemical composition specifies the identity, arrangement, and ratio of the chemical elements making up a compound by way of chemical and atomic bonds . Chemical formulas can be used to describe the relative amounts of elements present in a compound. For example, the chemical formula for water is H 2 O: this means that each molecule of water ...
Dec 10, 2023 · Answer a. Answer b. Combustion Analysis: Combustion Analysis, YouTube (opens in new window) [youtu.be] 7.5: Chemical Composition. Molecular formulas tell you how many atoms of each element are in a compound, and empirical formulas tell you the simplest or most reduced ratio of elements in a compound. If a compound's molecular ….
