26. A yellow-brown crystalline substance is heated strongly in a test tube at 280ºC. A clear liquid condenses around the mouth of the tube and the crystals gradually lose their yellow color and become dark green powder. Every gram of yellow-brown crystalline substance produces 0.39 g of clear liquid and 0.61 g of dark green powder. The same weight relationships are observed for samples of the crystals taken from many different sources. These observations are consistent with the hypothesis that the yellow-brown crystalline substance is:
a. A Solution
b. A heterogeneous mixture
c. A hydrated salt
d. An element
لطفا توضیح بدیدa. A Solution
b. A heterogeneous mixture
c. A hydrated salt
d. An element
