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Anettt [7]
3 years ago
14

How do you know if the reaction is exothermic

Chemistry
1 answer:
MArishka [77]3 years ago
5 0
Hey there!
Exothermic reactions release heat, causing its temperature to fall. If the reaction is lessening the temperature of the object while releasing all the heat, then you know that the reaction is indeed exothermic. Hope this helps!
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Pahoehoe is a type of
tatuchka [14]

<em>It is a lava type.....</em>

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using the water cycle diagram, match the number with the following; condensation runoff [precipitation and evaporation. once you
Oksanka [162]

Answer:

1. Evaporation

2. Condensation

3. Precipitation

4. Runoff

Explanation:

The water cycle shows how water moves on the earth as it passes through different phases.

Water on land is stored in oceans, rivers and other water bodies. This water coupled with those in plants and animals are turned into vapor through EVAPORATION. Evaporation facilitates the movement of water on the surface into the atmosphere.

In the atmosphere, the vapor condenses on dust particles found up there. The vapors forms a nuclei around the dust particles and water condenses at the saturated vapor pressure. This forms cloud.

As the water collects more and more, gravity forces the water to fall in form of PRECIPITATION. The precipitation can be in form of snow or rainfall.

When precipitation occurs, they move on the surface as SURFACE RUNOFFS. Some of the runoff goes back into oceans and rivers. Others infiltrates into the ground and collects in the ground water pool under the subsurface. Subsurface water can also get into into other water bodies when the water table coincides with the steam level.

The water in these bodies can then go into the cycle again. The sun is the source of energy for this process.

4 0
3 years ago
A chemist is given a liquid sample of an unknown substance. The substance can't be separated into it's components by filtration,
iren2701 [21]
Compound IS THE answer
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What is the equivalent mass of HBr in a complete neutralization reaction?
shusha [124]
Because it is a monoprotic acid equivalent mass = molar mass
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3 years ago
Which electrons are the valence electrons in a neutral atom of fluorine (F)? Write the orbital configuration of just the valence
ICE Princess25 [194]

Answer:

2s² 2p⁵

There are seven valance electrons in fluorine.

Explanation:

The elements of group 17 are called halogens. These are six elements Fluorine, Chlorine, Bromine, Iodine, Astatine. Halogens are very reactive these elements can not be found free in nature. Their chemical properties are resemble greatly with each other.

Properties of fluorine:

1. it is yellow in color.

2. it is flammable gas.

3. it is highly corrosive.

4. fluorine has pungent smell.

5. its reactions with all other elements are very vigorous except neon, oxygen, krypton and helium.  

Electronic configuration of fluorine:

F₉ = 1s² 2s² 2p⁵

Valance electrons in fluorine are 2s² 2p⁵.

Valance Orbital configuration:

2s² 2p⁵

There are seven valance electrons in fluorine.

4 0
3 years ago
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