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geniusboy [140]
3 years ago
13

Describe the difference beetween an extensive and intesive property

Chemistry
1 answer:
olasank [31]3 years ago
7 0

Extensive properties, such as mass and volume, depend on the amount of matter being measured. Intensive properties, such as density and color, do not depend on the amount of the substance present. Physical properties can be measured without changing a substance's chemical identity.

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Which metal will react spontaneously with Cu2+ (aq) at 25°C?
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Answer:

Mg  

Explanation:

The standard reduction potentials are

                                              <u>E°/V </u>

Au³⁺(aq ) + 3e⁻  ⟶  Au(s);     1.42

Hg²⁺(aq)  + 2e⁻  ⟶  Hg(l);     0.85

Ag⁺(aq)    +   e⁻  ⟶  Ag(s);    0.80

Cu²⁺(aq)   + 2e⁻ ⟶  Cu(s);   0.34

Mg2+(aq) + 2e- ⟶  Mg(s);   -2.38

The more negative the standard reduction potential, the stronger the metal is as a reducing agent.

Mg is the only metal with a standard reduction potential lower than that of Cu, so

Only Mg will react spontaneously with Cu²⁺.

 

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3 years ago
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Explanation:

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The mass number of an element is equal to
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The mass number is defined as the total number of protons and neutrons in an atom.

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B. nuclear to thermal to mechanical to electrical
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Which best describes a compound such as sodium chloride?
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It s a pure substance.

Explanation:

Can only be separated into its different elements by chemical means because it is connected by a chemical bond.

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