Question

Hydrogen burn in Oxygen to from Water. what mass of oxygen is needed burn 1 gram of hydrogen and what mass of water is Obtained?
H2+02=2H2O​

Answer 1

Answer:

Because atoms are neither created nor destroyed in a chemical reaction, the total mass of products in a reaction must be the same as the total mass of the reactants.

Chemical Equations

Chemical reactions are described by chemical equations.

Example: The reaction between hydrogen and oxygen to form water is represented by the following equation.

2 H2 + O2-----> 2 H2O

It is often useful to indicate whether the reactants or products are solids, liquids, or gases by writing an s, l, or g in parentheses after the symbol for the reactants or products, as shown in the following equations.

2 H2(g) + O2(g) -----> 2 H2O(g)

2 Al(s) + Fe2O3(s) -----> Al2O3(s) + 2 Fe(l)

Because so many reactions occur when solutions of two substances dissolved in water are mixed, a special symbol, aq, is used to describe these aqueous solutions.

The process in which a sample dissolves in water will be indicated by equations such as the following.