# data[].attributes.body
Percentage in the element of the compound is fuxed

# data[].attributes.body
Perentage in the element of the compound is fuxed

# data[].attributes.body
Perentage in the element of the compound

# data[].attributes.body
Carbon monoxide (COCO): 12 parts by mass of carbon combines with 16 parts by mass of oxygen.

# data[].attributes.body
Its chemical compound is C2H4O2, meaning that it is made of 2 atoms of carbon, 4 atoms of hydrogen, 2 atoms of oxygen. No other combination of carbon, hydrogen, and oxygen could be combined to create vinegar.

# data[].attributes.body
Made up of the individual elements of hydrogen, sulphur, and oxygen. The chemical compound is written H2SO4. The same proportions of hydrogen, sulphur, and oxygen must be combined to create sulfuric acid.

# data[].attributes.body
Water, written as the chemical compound H20, is made up of atoms of hydrogen and oxygen. If one oxygen atom is combined with two hydrogen atoms, water is created.

# data[].attributes.body
https://slideplayer.com/slide/11641640/

https://chem.libretexts.org/Textbook_Maps/Introductory_Chemistry/Book%3A_The_Basics_of_GOB_Chemistry_(Ball_et_al.)/05%3A_Introduction_to_Chemical_Reactions/5.1%3A_The_Law_of_Conservation_of_Matter

# data[].attributes.body
Nitrogen Dioxide (NO₂)
Mass of N : Mass of O
14:32
14/14  :  32/14
1:2.286

# data[].attributes.body
Nitrogen Monoxide (NO)
Mass of N : Mass of O
14:16
14/14  :  16/14
1:1.143

# data[].attributes.body
Dalton announced this law on 1803.
This supported the theory that matter consists of indivisible atoms.

# data[].attributes.body
https://chem.libretexts.org/Textbook_Maps/Introductory_Chemistry/Book%3A_Introductory_Chemistry_(CK-12)/04%3A_Atomic_Structure/4.03%3A_Law_of_Definite_Proportions

# data[].attributes.body
Examples

# data[].attributes.body
When two elements combine with each other they would form more than one compound, which combines with a fixed mass of the other element, will always be ratios of whole numbers.

# data[].attributes.body
When wood is burnt in O₂, its products are CO₂ and H₂O.

# data[].attributes.body
CH₄ + 2 O₂ → CO₂ + 2 H₂O

No atoms are lost.

# data[].attributes.body
This gas is produced from a variety of reactions, often by the burning of materials. The structure of the gas consists of one atom of carbon and two atoms of oxygen. Carbon dioxide production is of interest in many areas, from the amount we breathe to the amount of the gas produced by burning wood or fossil fuels. By knowing the exact composition of carbon dioxide, we can make predictions as to the effects of different chemical processes.

# data[].attributes.body
Any sample of pure water contains 11.19% hydrogen and 88.81% oxygen by mass. It does not matter where the sample of water came from or how it was prepared. Its composition, like that of every other compound, is fixed.

# data[].attributes.body
Written as the chemical compound NaCl, is made up of atoms of Sodium (Na) and Chlorine (Cl). The exact same proportions of sodium and chlorine must always be combined in order for salt to be created.

# data[].attributes.body
A given chemical compound always contains the same elements in the exact same proportions by mass.

# data[].attributes.body
Matter is neither created nor destroyed in the process of a chemical reaction. The atoms only rearrange.