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3 years ago

Balance using the redox method:

Chemistry

1 answer:

sweet [91]3 years ago

6 0

Choose all options that apply. Which of the following are equal to 20%? | a) .25 b) 1/5 Oc) 1/10 d) .20

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[2]

vitfil [10]

Explanation:

The temperature of the molten iron remained constant at 2750°C because of the heat absorbed to effect the phase change and not to change the temperature.

The heat of vaporization is a latent or hidden heat absorbed by substances that causes a phase change from liquid to gas.

In essence, the heat is used to break intermolecular bonds between the particles of the melted vat.
If enough heat is no supplied the molten vat will not boil off and become vapor.
In transitioning from liquid to gas, heat is absorbed by a body to effect the phase change.
When the body acquires enough heat, the particles are able to break off and boil.
At the 2750°C mark, this is what is happening.

learn more:

Specific heat brainly.com/question/7210400

#learnwithBrainly

6 0

3 years ago

An athlete can run 4 m/s. How far can she run in 3 minutes?

shutvik [7]

Answer:

720

Explanation:

4 m/s

60 seconds

= 180 seconds

3 minutes

4 m/s

= 720 m/s

180 seconds

5 0

3 years ago

What do you mean by the region or space that an electron revolves the nucleus in an atom?

MissTica

ANSWER

shell or the energy level

7 0

3 years ago

Refer to the example about diatomic gases A and B in the text to do problems 19 - 27. How many grams in 3 moles of A2?

dedylja [7]

B.) 3

hope you have a okay day

(GAME OF THRONES RULES

7 0

3 years ago

Read 2 more answers

At constant pressure, which of these systems do work on the surroundings? A ( s ) + B ( s ) ⟶ C ( g ) A(s)+B(s)⟶C(g) 2 A ( g ) +

Tju [1.3M]

Correct question:

At constant pressure, which of these systems do work on the surroundings?

(a) A ( s ) + B ( s ) ⟶ C ( g )

(b) 2 A ( g ) + 2 B ( g ) ⟶ 5 C ( g )

(d) 2 A ( g ) + 2 B ( g ) ⟶ 3 C ( g )

Answer:

(a) A ( s ) + B ( s ) ⟶ C ( g )

(b) 2 A ( g ) + 2 B ( g ) ⟶ 5 C ( g )

Explanation:

Work done by a system on the surroundings at a constant pressure is given as;

W = -PΔV

Where;

ΔV is gas expansion, that is final volume of the gas minus initial volume of the gas must be greater than zero.

Part (a)

A ( s ) + B ( s ) ⟶ C ( g )

ΔV = 1 - (0) = 1 (expansion)

Part (b)

2 A ( g ) + 2 B ( g ) ⟶ 5 C ( g )

ΔV = 5 - ( 2+ 2) = 1 (expansion)

Part (c)

A ( g ) + B ( g ) ⟶ C ( g )

ΔV = 1 - ( 1 + 1) = -1 (compression)

Part (d)

2 A ( g ) + 2 B ( g ) ⟶ 3 C ( g )

ΔV = 3 - ( 4) = -1 (compression)

Thus, systems where there is gas expansion are in part (a) and part (b). The correct answers are:

(a) A ( s ) + B ( s ) ⟶ C ( g )

(b) 2 A ( g ) + 2 B ( g ) ⟶ 5 C ( g )

4 0

3 years ago