The answer is B) Zinc will replace lead (...)
Answer:
1.) Tin oxide + Carbon → Tin + Carbon monoxide.
2.) Lead oxide + Carbon → Lead + Carbon monoxide.
These equations show that the metals are being extracted by their oxides by heating with carbon. This is because the metals (Tin and Lead) are less reactive than carbon. Remember, extraction methods of metals are determined by their reactivity. Since the elements tin and lead are less reactive than carbon, the extraction process of heating with carbon is needed. Remember that when a metal heats with carbon, the carbon displaces the metal from the compound and removes the oxygen from the oxide. Leaving you with the metal and carbon monoxide.
Monosaccharide are
any of the class of sugars (e.g., glucose) that cannot be hydrolyzed to give a simpler sugar.
examples: fructose ,galactose glucose
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Answer: The molarity of 198 g of barium iodide 
in 2.0 L of solution is 0.253 M.
Explanation:
Given: Mass = 198 g
Volume = 2.0 L
Molarity is the number of moles of solute present in liter of a solution.
Moles is the mass of a substance divided by its molar mass. So, moles of barium iodide (molar mass = 391.136 g/mol) is calculated as follows.
Now, molarity is calculated as follows.
Thus, we can conclude that the molarity of 198 g of barium iodide in 2.0 L of solution is 0.253 M.
