What type of compound does the formula, Fe2O3, represent ?

Chemistry

1 answer:

seraphim [82]3 years ago

8 0

It is:
Iron (III) Oxide

As a transition metal iron can have two oxidation states Fe+2 ferrous or Fe+3ferric.

Oxygen has an oxidation state of O−2.

In the case of Fe2O3 the oxidation states are balanced when 2 Fe+3 ions pair with 3 O−2.

Fe2O3 is Iron (III) oxide where the roman numeral informs us that the charge on the iron is +3, the common name would be ferric oxide.

If the iron was Fe+2 and the oxygen O−2, the formula would be FeO Iron (II) oxide or ferrous oxide.

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Is it possible for the entropy of both a closed system and its surroundings to decrease during the process?

iren [92.7K]

Only when heat is transferred from the system to its surroundings does a closed system suffer a decrease in entropy.

Only when heat is transferred from the system to its surroundings does a closed system suffer a decrease in entropy. Every internally reversible operation in a closed system generates entropy. Entropy remains constant in an adiabatic and internally reversible process of a closed system. Isolated systems' entropy cannot diminish.

When a system is not isolated but is in contact with its surroundings, the entropy of the open system may drop, requiring a balancing rise in the entropy of the surroundings. During a process, the entropy of an isolated system constantly increases, or in the case of a reversible process, remains constant (it never decreases).

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6 0

1 year ago

Sodium hydrogen carbonate, on heating, produces sodium carbonate, water and carbon dioxide.

RoseWind [281]

The mass of sodium hydrogen carbonate : 10.5 g

<h3>Further explanation</h3>

Given

1.5 dm' of CO₂

1 mol gas= 24 L at RTP(25 °C, 1 atm)

Required

the mass of sodium hydrogen carbonate