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3 years ago

14

Describe the reason why a reaction between two substances comes to an end.

1 answer:

Shtirlitz [24]3 years ago

8 0

Answer: The process by which a particular substance or different substances are transformed to another is called as Chemical Reaction.One reason, in the case of reversible reactions could be that the reaction reached equilibrium before the reaction was complete.Chemical reactions occur when chemical bonds between atoms are formed or broken. The substances that go into a chemical reaction are called the reactants, and the substances produced at the end of the reaction are known as the products.The concentration of reactants decreases as the reaction proceeds and at last their concentration comes to an end. Hence, the reaction stops too. If two reactants are being reacted, then the reactant which is in limited amount will consume first and will result in the termination of reaction.The usual reason is that one (or more) of the reactants gets used up.

Hope that was helpful.Thank you!!!

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If an object is travelling 25.0 meters/second, how far will it travel in 45 minutes?

Misha Larkins [42]

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$\\ \rm\longmapsto Distance=Speed(Time)$

$\\ \rm\longmapsto Distance=25(2700)$

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2 years ago

A flashlight battery is hooked to a toy motor, and then the battery and the connections are sprayed with a water-proof coating.

denis-greek [22]

Explanation:

Formula to calculate work done by motor is as follows.

Work done by motor = $mass \times g \times height$

where, g = gravitational constant = 10 $m/s^{2}$

Therefore, work done by motor is as follows.

Work done by motor = $1.00 kg \times 10 m/s^{2} \times 10.0 m$

= 100.0 J

Now, heat lost by water will be calculated as follows.

q = $mC \times \Delta T$

= $g \times 4.184 J/g^{o}C \times 0.024^{o}C$

= 10.0 J

Hence, heat gained by motor = heat lost by water

As, heat gained by motor = 10.0 J

So, change in energy = heat gained - work done

Therefore, change in energy will be calculated as follows.

Change in energy = heat gained - work done

= (10.0 J) - (100.0 J)

= -90.0 J

Thus, we can conclude that change in the energy of the battery contents is -90.0 J.

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3 years ago

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bogdanovich [222]

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3 years ago

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The energy of a pendulum is recorded at different positions in the table below. Use the data in the table to determine the amoun

natta225 [31]

Answer:

36.55 J

Explanation:

PE = Potential energy

KE = Kinetic energy

TE = Total energy

The following data were obtained from the question:

Position >> PE >>>>> KE >>>>>> TE

1 >>>>>>>> 72.26 >> 27.74 >>>> 100

2 >>>>>>>> 63.45 >> x >>>>>>>> 100

3 >>>>>>>> 58.09 >> 41.91 >>>>> 100

The kinetic energy of the pendulum at position 2 can be obtained as follow:

From the table above, at position 2,

Potential energy (PE) = 63.45 J

Kinetic energy (KE) = unknown = x

Total energy (TE) = 100 J

TE = PE + KE

100 = 63.45 + x

Collect like terms

100 – 63.45 = x

x = 36.55 J

Thus, the kinetic energy of the pendulum at position 2 is 36.55 J.

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2 years ago

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Paha777 [63]

Answer:

True

Explanation:

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