Why is a pyramid used to describe the energy available at different layers in an ecosystem

Grams are the unit of the mass that is used to calculate the moles. From 37.5 gms of iron, 53.6 gms of ferric oxide are produced.

What is mass?

Mass is the measurement of the moles of the substance and the molar mass.

Moles of iron from the mass is calculated as:

Moles of iron = 37.5 gms ÷ 55.84 = 0.671 moles

The balanced chemical reaction:

4Fe + 3O2 → 2Fe2O3

From the above it is deduced that 4 moles of iron produce 2 moles of ferric oxide so, 0.671 moles of iron will produce,

(0.671 × 2) ÷ 4 = 0.3375 moles

Mass of ferric oxide, from moles, is calculated as:

Mass = 0.33 moles × 159.687

= 52.696 gms

Therefore, 53.6 gms of ferric oxide will be produced from 37.5 gms of iron.

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Final answer:

The mass of Fe2O3 that can be produced from 37.5g of iron (Fe) is approximately 53.65g. This is achieved by converting mass of iron to moles, using stoichiometry from the balanced chemical equation to convert moles of iron to moles of Fe2O3, and then converting moles of Fe2O3 back to grams.

Explanation:

First, we need to figure out the molar mass of iron (Fe) which is approximately 55.85 g/mol and the molar mass of iron(III) oxide (Fe2O3) which is approximately 159.69 g/mol. We find this using the atomic masses of Iron (Fe) and Oxygen (O) from the periodic table and add them appropriately.

Next, to find the number of moles of iron we use the provided mass of Fe and its molar mass. We calculate this as (37.5 g Fe / 55.85 g/mol Fe) = 0.671 moles of Fe. Now, the balanced chemical equation for the formation of iron(III) oxide is: 4Fe + 3O2 --> 2Fe2O3. From this balanced equation, we know that it takes 4 moles of iron (Fe) to produce 2 moles of Fe2O3. Therefore, the moles of Fe2O3 formed from 0.671 moles of Fe would be (0.671 moles Fe * 2 moles Fe2O3/4 moles Fe) = 0.336 moles of Fe2O3.

Finally, to find the mass of Fe2O3 produced, we multiply the moles of Fe2O3 by its molar mass. We calculate this as (0.336 moles Fe2O3 * 159.69 g/mol Fe2O3) = 53.657 g of Fe2O3.

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The answer should be

A.  the number of electrons in the atom

D. A liquid becoming gas

The quantity of materials in a sample determines whether a property is referred to as an extensiveproperty. The type of matter in a sample, not the quantity, determines an intense attribute of matter.

What are physical properties?

Physical properties are defined as the properties of matter that may be seen and measured without affecting the sample's chemical composition. Physical characteristics of substances and systems are frequently referred to as extensive and intensive characteristics.

Mass, weight, and volume are examples of extensive qualities that change depending on the amount of the substance. Contrarily, intensive qualities, such as color, melting point, boiling point, electrical conductivity, and physical state at a specific temperature, are independent of the amount of the substance present.

Thus, the quantity of materials in a sample determines whether a property is referred to as an extensiveproperty. The type of matter in a sample, not the quantity, determines an intense attribute of matter.

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Answer:

extensive properties depend on the amount of matter being used. intensive properties do not depend on the present substantive.

Explanation: