Abstract
This study aimed to determine the composition of gold to silver minerals in rocks originating from Dongi-Dongi at 2 stations and to determine the composition of gold to silver minerals in rocks fixed to definite proportion. This study used secondary data, which were the result of rock analysis from Dongi-Dongi. The analysis showed that the gold composition from the three samples at Station 1 ranged from 0.01 to 0.99%, and the composition of silver ranged from 0.02 to1.46%. While the composition of gold at Station 2 ranged from 0.01to 2.55%, and the composition of silver ranged from 0.07 to3.02%. The results of the similarity analysis test of two variances and more than two variances showed that the composition of gold to silver has the same ratio in each sample, with Fcount <Ftable, then H0 is accepted. Therefore, it can be concluded that the ratio of gold to silver in each sample is the same, and follows the Law of Definite Proportion as stated by Proust that a chemical compound consists of elements with a mass ratio always remains the same. In other words, each sample or compound has a fixed composition of elements
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