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3 years ago

When comparing the two elements K and Ge , the more metallic element is__________ based on periodic trends alone.

Chemistry

1 answer:

Inessa [10]3 years ago

7 0

Answer:

Option D and Option B

When comparing the two elements K and Ge , the more metallic element is_____K_____ based on periodic trends alone.

When comparing the two elements Sb and Pb , the more metallic element is_____Pb______ based on periodic

Explanation:

The metallic characteristic increases when we move down a column in a periodic table or when we move left in the row.

Potassium and Germanium are located on the same row, but germanium lies on the right side of potassium. Thus, potassium (K) is more metallic than Germanium (Ge)

While Lead (Pb) lies to left of Sb in the adjacent column and is also lies below Sb. Hence Pb is more metallic than Sb

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Choose all the answers that apply.

Vitek1552 [10]

Answer: They Have Waxy Leaves And Stems

Explanation:

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3 years ago

Read 2 more answers

If the forward reaction goes close to completion and has a high yield, what is the expected value of the equilibrium constant (k

Anna007 [38]

If the forward reaction goes close to completion and has a high yield, that means the concentration of products will be higher than the concentration of reactants.

So if the concentration of products is higher, Kc (equilibrium constant) will be greater than 1.

Recall the calculation for the equilibrium constant for reaction. Picture below might help you.

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3 years ago

Reduce the following molecular formulas to empirical formulas. Please help!

zvonat [6]

This is done by reducing each number by a common factor for each formula.

C3H6O6- all can be divided by 3 -> CH3O3 (you don't have to put a 1 for C, only if your teacher requests it. It is generally understood if not written)

H2O2- all can be divided by 2 -> H1O1 (had to put the 1's bc of the unintended language)

C8H8S2- all can be divided by 2 -> C4H4S

P5O15- all can be divided by 5- PO3

*****it is important to note that all numbers in the molecular formula are divided by the same thing to reduce them. decimals are never used in empirical formulas, only whole numbers.*****

3 0

3 years ago

Please help I don't have much time, I have 8 questions.

ValentinkaMS [17]

Answer:

1) The law of reflection states that the angles of incidence and reflection will always be congruent (option B)

2) If light passes from a gas to a liquid, it will slow down causing it to bend toward the source (option C).

3) Light travels fastest through a vacuum because particles are unobstructed since there are no media (option d).

4) Why do we see objects in color? Some wavelengths of light are reflected and some are absorbed (option d).

5) How are we able to see objects? Light is reflected (option d).

6) A ray of light passes from one medium to another and speeds up. As a result, it will bend away from the source of light (option c).

7) When light passes from one medium to another, it bends. What is this called? Refraction (option b).

8) Light hits a rough, textured surface. The beams split and reflect many different directions. This is called diffusion and will cause an image to clear (option b).

Explanation:

1) Light reflection consists of the bouncing of a beam of light against a polished surface, such as a mirror. This produces: an incident beam of light, a reflected beam of light, a point of incidence and two angles produced by the incident and reflected beam.

Since the angle of incidence is equal to the angle of reflection it can be said that both are congruent.

2) The passage of a ray of light from one medium to another is called refraction and involves a change in the speed and direction of the ray, due to the change in density from one medium to another.

The passage of light from a gaseous medium (less dense) to a liquid medium (more dense) produces a decrease in its speed and a shorter angle of refraction than that of incidence, so that the light is observed closer to the source.

3) The speed of light in a vacuum will always be higher because it does not depend on factors such as electricity or magnetism that get in its way, it is estimated to be near 300k m/s -exactly 299.792,46 meters per second- and is a constant value.

Obviously, the speed of light in any medium, such as gas, liquid or gel, will be lower than the speed of light in a vacuum.

4) White or visible light consists of the combination of all the colours of the light spectrum, which when combined give the light a clear appearance. An example of this is the decomposition of white light when passing through a prism or a drop of water.

The ability to perceive colors is due to visible light reflected on an object, where each color has a different wavelength. In the same way, absorbed light beams will not be visible.

5) When light "hits" an object, the reflected waves make it possible for that object to be seen, which is more difficult when the object is transparent.

This action of light on objects also allows us to appreciate their characteristics, such as shape, size, texture and color, differentiating and recognizing them thanks to these characteristics.

6) Due to the refraction of light, the passage of a ray of light from a dense medium to one of lower density - as from a liquid medium to a gaseous medium - causes its speed to increase, while the angle of refraction will be greater.

As a consequence of the open angle of refraction, the refracted light will be observed far from the light source (it will bend away from the source of light).

7) Refraction is a physical phenomenon that consists of the variation of speed and direction that light acquires when it passes from one medium to another.

In general, the different media have differences in their densities, on which the changes that occur in the waves when they pass through them depend, which is called refractive index. This index is different in each case, and influences the direction and speed of propagation of a wave.

8) Light diffusion occurs when light hits an opaque and irregular surface, causing rays to be scattered in several directions. This usually produces an effect of lightness on the illuminated objects.

Unlike reflection, light diffusion has multiple points of incidence, which generate various angles, responsible for the scattering of light.

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3 years ago

Consider two aqueous nonvolatile and nonelectrolyte solutions, each with a solute concentration of 1 M. One contains glucose, wh

Svetach [21]

Answer:

a and b are correct

Explanation:

This because both are aqueous solutions,therefore, identity of solvent is same that is water.

And because both solutions are non electrolyte they would not ionize in solution, and for the same concentration, the freezing point of both solution would also be same. Since depression in freezing point is a colligative property this means that it depends on number of solute particles not nature of particles .

Hence answer is that their freezing points and Identity of the solvent shall remain the same.

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3 years ago