In which chemical equation is the number of atoms in the reactants the same as the number of atoms in the products
1.Zn + 2HCl → H2 + ZnCl2
2. The total number of atoms does not change, so mass is conserved in the reaction
3. 215 amu
4.76 amu
For Conservation in Chemical Reactions connexus 2022
bc idk srry
To determine the chemical equation in which the number of atoms in the reactants is the same as the number of atoms in the products, we need to consider the law of conservation of mass. According to this law, mass is neither created nor destroyed during a chemical reaction. Therefore, the total number of atoms before the reaction should be equal to the total number of atoms after the reaction.
Let's take as an example the combustion of methane (CH4) in the presence of oxygen (O2) to form carbon dioxide (CO2) and water (H2O):
CH4 + 2O2 -> CO2 + 2H2O
In this equation, there are one carbon (C) atom on both sides, four hydrogen (H) atoms on both sides, and four oxygen (O) atoms on both sides. Therefore, the number of atoms in the reactants (CH4 + 2O2) is the same as the number of atoms in the products (CO2 + 2H2O).
Hence, the chemical equation that fulfills the condition of having the same number of atoms in the reactants as in the products is the combustion of methane:
CH4 + 2O2 -> CO2 + 2H2O