Introduction:
In this analysis, we are given the results of two samples containing phosphorus and chlorine. We need to determine whether these samples are from the same compound or different compounds. Additionally, we need to identify the law of chemical combinations that is being obeyed by the given samples.

Analysis:
To analyze the samples, we will consider the data provided and compare the ratios of phosphorus and chlorine in each sample. If the ratios are the same, it indicates that the samples are from the same compound. On the other hand, if the ratios are different, it suggests that the samples are from different compounds.

Sample 1:
- Phosphorus: 2 grams
- Chlorine: 7 grams

Sample 2:
- Phosphorus: 4 grams
- Chlorine: 14 grams

Comparing Ratios:
To compare the ratios of phosphorus and chlorine in both samples, we will calculate the ratio of phosphorus to chlorine for each sample.

Ratio for Sample 1:
Phosphorus to Chlorine ratio = 2 grams / 7 grams = 2/7

Ratio for Sample 2:
Phosphorus to Chlorine ratio = 4 grams / 14 grams = 2/7

Conclusion:
By comparing the ratios of phosphorus to chlorine in both samples, we can observe that the ratios are the same. This indicates that the two samples are from the same compound.

Law of Chemical Combination:
The law that is being obeyed by the given samples is the Law of Definite Proportions. According to this law, a chemical compound always contains the same elements in the same definite proportions by mass.

Explanation:
The Law of Definite Proportions states that the ratio of elements in a compound is always fixed and constant. In the given samples, the ratio of phosphorus to chlorine is consistently 2:7. This implies that the samples are from the same compound, as the ratio remains unchanged.

This law is crucial in understanding the composition of chemical compounds and predicting their properties. It allows chemists to accurately determine the proportions of elements in a compound and provides a foundation for stoichiometry and chemical calculations.

The analysis of the given samples demonstrates the application of this law, as the consistent ratio of phosphorus to chlorine confirms that the samples are from the same compound and obey the Law of Definite Proportions.

Summary:
In summary, the analysis of the two samples containing phosphorus and chlorine indicates that they are from the same compound. This conclusion is drawn based on the comparison of the ratios of phosphorus to chlorine in both samples, which were found to be the same. The law being obeyed by the samples is the Law of Definite Proportions, which states that chemical compounds have fixed and constant proportions of elements.