Chemical equation is balanced according to the law of

Options

A. multiple proportions
B. reciprocal proportion
C. conservation of mass
D. definite proportion

Explanation

To answer the question "Chemical equation is balanced according to the law of...", we need to identify the correct law that governs the balancing of chemical equations. Here’s a step-by-step solution:

### Step 1: Understanding the Laws of Chemical Combination
There are four main laws related to chemical combinations:
1. **Law of Multiple Proportions**: This law states that when two elements combine to form more than one compound, the masses of one element that combine with a fixed mass of the other are in a ratio of small whole numbers.
2. **Law of Reciprocal Proportions**: This law states that if two elements combine with a fixed mass of a third element, the masses of the two elements will be in a simple ratio.
3. **Law of Conservation of Mass**: This law states that in a chemical reaction, the total mass of the reactants is equal to the total mass of the products. This implies that matter cannot be created or destroyed in a chemical reaction.
4. **Law of Definite Proportions**: This law states that a chemical compound always contains its component elements in fixed ratio by mass, regardless of the sample size or source.

### Step 2: Identifying the Relevant Law for Balancing Equations
When balancing a chemical equation, we ensure that the number of atoms of each element is the same on both sides of the equation. This is directly related to the **Law of Conservation of Mass**, which states that mass is neither created nor destroyed in a chemical reaction. Therefore, the total mass and the number of atoms must remain constant.

### Step 3: Conclusion
The correct answer to the question is that a chemical equation is balanced according to the **Law of Conservation of Mass**.

### Final Answer
Chemical equation is balanced according to the **Law of Conservation of Mass**.

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