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vredina [299]
2 years ago
11

8. Water behind a dam, a moving car, and electricity moving in a circuit all are examples of

Chemistry
1 answer:
mote1985 [20]2 years ago
7 0

Answer:

a. Help accomplish a job

Explanation:

Energy is defined as the ability to do work. It is the ability to get a job done.

Where energy is deficient, no job or work can be done.

  • In a water behind a dam, potential energy is stored.
  • Potential energy is due to the position of a body.
  • A moving car has kinetic energy which the energy due the motion of a body.
  • Electrical energy is used to carry the currents in a circuit round about.
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Phosphoric acid, which is commonly used as rust inhibitor, food additive and etching agent for dental and orthopedic use, can be
Sphinxa [80]

Answer:

P_4_{(I)}+5O_2_{(g)}+6H_2O_{(l)}\rightarrow +4H_3PO_4_{(l)}

Explanation:

The first step is:

P_4_{(I)}+5O_2_{(g)}\rightarrow 2P_2O_5_{(g)}

Second step is:

P_2O_5_{(g)}+3H_2O_{(l)}\rightarrow 2H_3PO_4_{(l)}

Multiplying second step by 2, and adding both the steps, we get that:

P_4_{(I)}+5O_2_{(g)}+2P_2O_5_{(g)}+6H_2O_{(l)}\rightarrow 2P_2O_5_{(g)}+4H_3PO_4_{(l)}

Cancelling common species, we get that:

P_4_{(l)}+5O_2_{(g)}+6H_2O_{(l)}\rightarrow +4H_3PO_4_{(l)}

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