Where are the reactants and products located in a chemical equation?
In a chemical equation, the reactants are located on the left side of the equation, while the products are located on the right side. The reactants are the substances that undergo a chemical change, while the products are the new substances that are formed as a result of the chemical reaction.
For each of the expressions below, can you find the total number of atoms represented?
2MgCl2 How many- Mg: ______ Cl: _______ Total Atoms: _________
NaBr How many- Na: ______ Br: ________ Total Atoms: __________
4H2O How many- H: _______ O: _______ Total Atoms: ________
For 2MgCl2:
- Mg: 2
- Cl: 4 (2 from each MgCl2)
- Total atoms: 6
For NaBr:
- Na: 1
- Br: 1
- Total atoms: 2
For 4H2O:
- H: 8 (4 from each H2O)
- O: 4 (4 from each H2O)
- Total atoms: 12
Mass of MgCl2: ____________
Mass of NaBr: _____________Mass of H2O: _____________
To find the mass of a compound, we need to know the molar masses of the elements involved. The molar mass of an element is the mass of one mole of that element.
The molar masses are as follows:
- Mg: 24.31 g/mol
- Cl: 35.45 g/mol
- Na: 22.99 g/mol
- Br: 79.90 g/mol
- H: 1.01 g/mol
- O: 16.00 g/mol
Mass of MgCl2:
To find the mass of MgCl2, we need to sum up the molar masses of Mg and Cl.
2(24.31 g/mol) + 2(35.45 g/mol) = 95.21 g/mol
Mass of NaBr:
The mass of NaBr can be found by adding the molar masses of Na and Br.
22.99 g/mol + 79.90 g/mol = 102.89 g/mol
Mass of H2O:
The mass of H2O can be determined by adding the molar masses of H and O.
2(1.01 g/mol) + 16.00 g/mol = 18.02 g/mol
Therefore, the mass of MgCl2 is 95.21 g/mol, the mass of NaBr is 102.89 g/mol, and the mass of H2O is 18.02 g/mol.
In a chemical equation, the reactants are located on the left side and the products are located on the right side. The reactants are the substances that participate in the chemical reaction, while the products are the substances that are formed as a result of the reaction.
To understand where the reactants and products are located in a chemical equation, you can follow these steps:
1. Identify the reactants: These are the substances that are present before the chemical reaction takes place. They are listed on the left side of the equation, separated by a plus sign (+) or an arrow (→).
2. Identify the products: These are the substances that are formed as a result of the chemical reaction. They are listed on the right side of the equation, separated by a plus sign (+) or an arrow (→).
For example, consider the following chemical equation for the reaction between hydrogen gas (H2) and oxygen gas (O2) to form water (H2O):
2H2 + O2 → 2H2O
In this equation, the reactants (H2 and O2) are located on the left side of the equation, while the products (H2O) are located on the right side. The number in front of each reactant and product indicates the stoichiometric coefficient, which represents the ratio of moles of each substance involved in the reaction.
So, to summarize, the reactants are located on the left side, and the products are located on the right side of a chemical equation.