Final answer:
To calculate the amount of each element in a compound, you must determine the molar mass of each element and use the formula: number of moles = mass (g) / molar mass (g/mol). The number of moles indicates how much of each element is present in the given mass of each substance.
Step-by-step explanation:
The question appears to ask about determining the amount of each element in certain compounds and also about calculating the number of moles of given samples using their molar masses. Molar mass is a key concept in Chemistry that relates the mass of a substance to the number of moles. Each of the compounds listed in the question (e.g., silver, carbon, sodium, chloroform, iron, sulfur, chlorine, hydrogen) has known molar masses, which can be used along with Avogadro's number (6.022 × 1023 atoms per mole) to calculate the number of moles present in a given mass of the substance. Here is an example of how to calculate the number of moles:
Example Calculation
To find the number of moles of silver (Ag) in a 16 g sample:
Determine the molar mass of silver, which is approximately 107.87 g/mol.
Use the formula: number of moles = mass (g) / molar mass (g/mol).
Insert the mass (16 g) into the formula: number of moles for silver = 16 g / 107.87 g/mol ≈ 0.148 moles of Ag.
This process would be repeated for each substance in the question to determine the number of moles of each element in the given mass.