CHEMISTRY HIGH SCHOOL

Based on reactivity, which of the following elements can replace iron (Fe) in a compound during a single replacement reaction?Al
Cu
F
Co

Answers

Answer 1
Answer:

Answer: Option (a) is the correct answer.

Explanation:

Based on reactivity series, the reactivity of some metals in decreasing order is as follows.

      Li, K, Ba, Ca, Mg, Al, Mn, Zn, Cr, Fe, Co, Ni

Thus, it can be seen that Al is more reactive than Fe, so it will replace iron in a single displacement reaction. Whereas cobalt is less reactive than iron hence, it will not replace Fe.

Fluorine being an anion will not replace a cation because in displacement reactions, only a cation can replace another cation and an anion can replace another anion.

Hence, we can conclude that Al will replace iron (Fe) in a compound during a single replacement reaction.

   

Answer 2
Answer: based on reactivity, the elements that can replace iron in a compound during a single replacement reaction would be :
Al

Because its higher than the other options in reactivity series

hope this helps

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Answers

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Answers

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Which traits explain the differences between halogens and alkali metals? Select all that apply Question 5 options: Halogens are better oxidizing agents than their alkali metal counterparts within the same period. Halogens have a larger van der Waal's radii than their alkali metal counterparts within the same period. Halogens have a higher effective nuclear charge than their alkali metal counterparts within the same period. Halogens have a higher first ionization energy than their alkali metal counterparts within the same period. Halogens have a higher electron affinity than their alkali metal counterparts within the same period.

Answers

Answer:

Halogens are better oxidizing agents than their alkali metal counterparts within the same period

Halogens have a higher first ionization energy than their alkali metal counterparts within the same period.

Halogens have a higher electron affinity than their alkali metal counterparts within the same period.

Halogens have a higher effective nuclear charge than their alkali metal counterparts within the same period

Explanation:

Effective nuclear charge increases across a period and accounts for increase in ionization energy across a period. This explains why halogens in the same period with alkali metals have higher effective bucket charge as well as ionization energy than the alkali metals.

Similarly, electron affinity increased across a period, halogens have greater ekctron affinity than corresponding alkali metals in the same period.

The combination of two or more atoms, from the same or different elements, creates a(n)__________. a. element c. molecule b. atom d. mixture

Answers

The correct answer to complete the sentence is C. The combination of two or more atoms, from the same or different elements, creates a molecule. Compounds are a type of molecules made of atoms from different elements held together by chemical bonds.

Given the reaction at 101.3 kPa and 298 K: hydrogen gas + iodine gas -> hydrogen iodide gas This reaction is classified as

Answers

Answer:

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Explanation:
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c. calcium.
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Answers

The answer is b) Water.

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