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3 years ago

¿Cómo puedes conocer tu condición física?

Chemistry

1 answer:

ICE Princess25 [194]3 years ago

7 0

Answer:

tal vez haga algunas pruebas de condición física como lagartijas y tocarse los dedos de los pies.?

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When sufficient quantity of heat has been added to reach the boiling point of a solution, what happens to any additional heat ad

Daniel [21]

Answer:

d) additional heat alters the vicosity and the surface tension of the liquid which raises the vapor pressure and increases the boiling point which is why you must continually heat the solution

8 0

3 years ago

Cell membranes are selectively permeable. This means that A. only water can move freely across the cell membrane. B. any substan

MaRussiya [10]

Answer:

C. some substances can move freely across the cell membrane, while others must be transported.

Explanation:

6 0

3 years ago

If the reaction 2HgO --> 2Hg + O2 is endothermic, which bonds are the strongest?

Alika [10]

Endothermic reaction means the reactant side takes heat from surrounding and get decomposed i.e ∆H=-ve
If the equation is exothermic then it means the reactant is happy to decompose .But it's not as it's endothermic

Now

HgO is Omitted from our solution option.

Hg is a atom so no bonds hence no bond strength occurs.

O_2 is a molecule and so it's our answer .

3 0

2 years ago

Can you guys help me I really need help ! Just started this 6th grade I really need help I’m use to this

NeX [460]

Answer:

Mechanical - Freezing & Thawing, Acid Rain, Flowing Water, oxidation

Chemical - Rusting, abrasion

Explanation:

hope this helps!

5 0

3 years ago

In which of the following compounds does the carbonyl stretch in the IR spectrum occur at the lowest wavenumber?

klio [65]

Answer:

a. Cyclohexanone

Explanation:

The principle of IR technique is based on the vibration of the bonds by using the energy that is in this region of the electromagnetic spectrum. For each bond, there is a specific energy that generates a specific vibration. In this case, you want to study the vibration that is given in the carbonyl group C=O. Which is located around 1700 cm-1.

Now, we must remember that the lower the wavenumber we will have less energy. So, what we should look for in these molecules, is a carbonyl group in which less energy is needed to vibrate since we look for the molecule with a smaller wavenumber.

If we look at the structure of all the molecules we will find that in the last three we have heteroatoms (atoms different to carbon I hydrogen) on the right side of the carbonyl group. These atoms allow the production of resonance structures which makes the molecule more stable. If the molecule is more stable we will need more energy to make it vibrate and therefore greater wavenumbers.

The molecule that fulfills this condition is the cyclohexanone.

See figure 1

I hope it helps!

4 0

4 years ago