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3 years ago

In a displacement reaction of building a railway, how is the heat supplied?

1 answer:

8 0

N a single-displacement reaction, one element displaces another element in a compound.
The general equation for a single-displacement reaction is:
A + B-C → A-C + B
A and B must be either different metals (including H) or different halogens.
Chemists have devised an Activity Series. It lists the metals and nonmetals in decreasing order of chemical activity. An element that is higher in the series will displace an element that is below it. This enables chemists to predict which combinations will undergo single displacement reactions.

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How is the structure of atoms altered during fission and fusion?

Dmitriy789 [7]

At first sight it doesn't bode well. The key is in how firmly the protons and neutrons are held together. In the event that an atomic response produces cores that are more firmly bound than the firsts then vitality will be created, if not you should place vitality into make the response happen.

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4 years ago

Name the ionic compounds that contain transition metals.

Bumek [7]

Salts of Transition elements.

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3 years ago

Consider a galvanic cell based on the reaction Al^3+_(aq) + Mg_(s) rightarrow Al_(s) + Mg^2+ _(aq) The half-reactions are Al^3+

grin007 [14]

Answer: The standard cell potential of the cell is -0.71 V

Explanation:

The half reactions follows:

Oxidation half reaction: $Mg\rightarrow Mg^{2+}+2e^-;E^o_{Mg^{2+}/Mg}=-2.37V$ ( × 3)

Reduction half reaction: $Al^{3+}(aq.)+3e^-\rightarrow Al(s);E^o_{Al^{3+}/Al}=-1.66V$ ( × 2)

The balanced cell reaction follows:

$2Al^{3+}(aq.)+3Mg(s)\rightarrow 2Al(s)+3Mg^{2+}(aq.)$

To calculate the $E^o_{cell}$ of the reaction, we use the equation:

$E^o_{cell}=E^o_{cathode}-E^o_{anode}$

Substance getting oxidized always act as anode and the one getting reduced always act as cathode.

Putting values in above equation, we get:

$E^o_{cell}=-2.37-(-1.66)=-0.71V$

Hence, the standard cell potential of the cell is -0.71 V

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3 years ago

Water can dissolve other substances. Which factor best contributes to this property of water?

Sav [38]

Water is known to be the universal solvent because it can mostly dissolve most of the substances. The reason behind its solvability is the bonding of intermolecular forces of attraction. The answer is letter B. Out of the many bondings between molecules, the bond that governs water is H bonding or hydrogen bonding. Water is composed mostly of two atoms of hydrogen one atom of oxygen. Both the hydrogen and oxygen are polar elements and hydrogen is bounded with a high electronegativity oxygen atom.

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3 years ago

Read 2 more answers

One percent of the atmosphere is .. gas

Liula [17]

Answer:

Nitrogen accounts for 78% of the atmosphere, oxygen 21% and argon 0.9%. Gases like carbon dioxide, nitrous oxides, methane, and ozone are trace gases that account for about a tenth of one percent of the atmosphere.

Explanation:

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3 years ago