This chemistry question involves key chemical concepts and calculations. The detailed solution below walks through each step, from identifying the reaction type to computing the final answer.
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Welcome back faith — been a while! Let's pick up where you left off. Dmitri Mendeleev's major contribution to modern chemistry was the development of the periodic table. Step 1: In 1869, Mendeleev arranged the known chemical elements in order of increasing atomic mass. Step 2: He organized them into rows and columns based on their recurring chemical properties, creating a table. Step 3: Crucially, Mendeleev left gaps in his table for elements that he predicted would be discovered later. He even accurately predicted the properties of these undiscovered elements (like gallium and germanium). Step 4: This predictive power and the clear organization of elements based on their properties formed the foundation of the modern periodic table, which is now a cornerstone of chemistry for understanding element relationships and predicting chemical behavior. What's next? 📸