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timofeeve [1]
3 years ago
8

What evidence of a chemical reaction might you see in bleaching a stain

Chemistry
2 answers:
jonny [76]3 years ago
6 0
The properties in the bleach eating away at the stain. The molecules in that destroying the ones causing the stain. As well as it spreads and leaves it's own marks on the clothes, because it destroys the molecules giving the clothing color.
Anvisha [2.4K]3 years ago
4 0
For bleaching a stain, there will be an identifiable odor and it will easily absorb colors and/or stains
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What is a magnetic field
babymother [125]

a region around a magnetic material or a moving electric charge within which the force of magnetism acts.

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3 years ago
A piece of metal with a mass of 159 g is placed in a 50 mL graduated cylinder. The water level rises from 20. mL to 41 mL. What
almond37 [142]

Volume of water displaced is equal to the volume of the metal. So 41 - 20 = 21 ml. Density = mass / volume so density = 159 / 21 = 7.57 g/ml

8 0
3 years ago
2NaOH + H2So4=______+2H2O<br>​
Dmitry [639]

Answer:

2NaOH + H _{2} SO _{4} = >  \:Na _{2}SO _{4}  +2H _{2} O

7 0
3 years ago
A 45.0-gram sample of copper metal was heated from 20.0°C to 100.0°C. Calculate the heat absorbed, in kJ, by the metal.
s2008m [1.1K]

Answer:

1.386 KJ

Explanation:

From the question given above, the following data were obtained:

Mass (M) of copper = 45 g

Initial temperature (T1) = 20.0°C

Final temperature (T2) = 100.0°C

Heat absorbed (Q) =..?

Next, we shall determine the change in temperature. This can be obtained as follow:

Initial temperature (T1) = 20.0°C

Final temperature (T2) = 100.0°C

Change in temperature (ΔT) =?

ΔT = T2 – T1

ΔT = 100 – 20

ΔT = 80 °C

Next, we shall determine the heat absorbed by the sample of copper as follow:

Mass (M) of copper = 45 g

Change in temperature (ΔT) = 80 °C

Specific heat capacity (C) of copper = 0.385 J/gºC

Heat absorbed (Q) =..?

Q = MCΔT

Q = 45 × 0.385 × 80

Q = 1386 J

Finally, we shall convert 1386 J to KJ. This can be obtained as follow:

1000 J = 1 KJ

Therefore,

1386 J = 1386 J × 1 KJ /1000 J

1386 J = 1.386 KJ

Thus, the heat absorbed by the sample of the sample of copper is 1.386 KJ.

5 0
3 years ago
Tell me, how the different states of matter are different and the same.
REY [17]

Answer:

Gases, liquids and solids are all made up of microscopic particles, but the behaviors of these particles differ in the three phases. Gas are well separated with no regular arrangement. liquid are close together with no regular arrangement. solid are tightly packed, usually in a regular pattern.

Explanation:

4 0
2 years ago
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