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Akimi4 [234]
3 years ago
11

Which of these properties is a physical property of aluminum. aluminum rust when it is exposed to moisture in air. Aluminum is a

good conductor of heat. Aluminum reacts with oxygen to form aluminum oxide. Aluminum reacts with hydrochloric acid to give off aluminum chloride and hydrogen gas
Chemistry
2 answers:
katen-ka-za [31]3 years ago
6 0
Aluminium is a good conductor of heat
physical properties is what you can see about the element or object all other options are chemical properties
LiRa [457]3 years ago
5 0

Answer:

The answer is: Aluminum is a good conductor of heat.

Explanation:

A physical property describes a characteristic of an element, which can be measured and in which there is no chemical change associated with the element, such as density, boiling point, viscosity, among others, The aluminum rust is a process where  aluminum undergoes an oxidation process, so is in the reaction with oxygen to produce aluminum oxyde. An the reaction with hydrochloric acid is also a chemical process.

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Bogdan [553]

Answer:

2Rb(s) + Sr^+(aq) → 2Rb^+ (aq) + Sr(s)

Explanation:

Rubidium has a more negative reduction potential (-2.98 V) compared to strontium (-2.89 V).

Hence, in a redox reaction involving rubidium and strontium, rubidium will be oxidized while strontium is reduced.

The balanced redox reaction equation is obtained from;

Oxidation half equation;

2Rb(s) ---->2Rb^+(aq) + 2e

Reduction half equation;

Sr^2+(aq) + 2e ----> Sr(s)

Overall reaction equation;

2Rb(s) + Sr^+(aq) → 2Rb^+ (aq) + Sr(s)

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<u>Explanation:</u>

Molecular formula is the chemical formula which depicts the actual number of atoms of each element present in the compound.  

Empirical formula is the simplest chemical formula which depicts the whole number of atoms of each element present in the compound.  

In both the formulas, the nature of atoms remains the same but the number differs.

For Example: The molecular formula of oxalic acid is C_2H_2H_4 but the empirical formula of oxalic acid is CHO_2

To calculate the molecular formula, we need to find the valency which is multiplied by each element to get the molecular formula.

The equation used to calculate the valency is:

n=\frac{\text{Molecular mass}}{\text{Empirical mass}}

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Explanation:

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