Iron Can Form Two Ionic Compounds with Sulfur,one Containing Fe²

question 134

Multiple Choice

Iron can form two ionic compounds with sulfur,one containing Fe²⁺ and the other containing Fe³⁺.What is the difference in their formula unit masses?

• A)143.76 amu
• B)119.97 amu
• C)87.91 amu
• D)55.85 amu
• E)32.06 amu

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Definitions:

Direct Labour Efficiency Variance

The difference between the actual number of labor hours worked and the standard hours expected, multiplied by the standard labor rate.

Direct Labour Hours

The total time labor directly involved in manufacturing a product or providing a service, often used for allocating labor costs to products or services.

Standard Hours

The set amount of time expected to be spent on a particular task, project, or to produce a certain quantity of goods.