the law of definite proportions
no. Carbohydrates contain carbon, hydrogen, and oxygen.
ch20
When hydrogen and oxygen combine to form water, the total mass of the reactants before the reaction is equal to the total mass of the products after the reaction. This demonstrates the law of conservation of mass, which states that mass is neither created nor destroyed in a chemical reaction, only rearranged.
particles made up of 2 hydrogen n 1 oxygen
Oxygen and Hydrogen
Carbon, Hydrogen, and Oxygen ine the ratio of 1:2:1
Quantitative means having numbers and measurements. qualitatitive does not. Qualitative Example: mix hydrogen and oxygen and you get water. Quantitative Example: mix two moles of Hydrogen and one mole of Oxygen to get one mole of water.
That statement is false.
Water consists of two hydrogen atoms and one oxygen atom.
Hydrogen and oxygen are the products of electroysis of water .
In theory, the energy produced by creating four oxygen-hydrogen bonds after breaking two Oxygen-oxygen and hydrogen-hydrogen bonds in the reaction O2 + 2H2 -> 2H2O (hydrogen combustion in oxygen) is exactly the same than the energy needed to break four oxygen-hydrogen bonds to create two oxygen-oxygen and hydrogen-hydrogen bonds in the reaction 2H2O -> O2 + 2H2 (water electrolysis) However, you will always have great energy loss during electrolysis (an important part of your energy will be used to warm up your water) and in getting back your energy from your oxygen and hydrogen gas (a combustible battery or a motor will warm up too).
The formula H2O indicates that there are two atoms of hydrogen for every atom of oxygen in a molecule of water. You could write it H2O1 but that would be redundant.