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yuradex [85]
3 years ago
13

If you put a pencil in a cup of water, it looks as if it is broken and larger in the water. This is because light waves A) can r

eflect off the surface. B) are absorbed instead of reflected. C) bend when passing from air to water. D) wrap around a barrier, like the pencil.
Chemistry
2 answers:
tekilochka [14]3 years ago
6 0

Your answer should be C. bend when passing from air to water. Hope this helps! =^-^= If you need an explanation, just let me know.

Usimov [2.4K]3 years ago
3 0

Answer: C) bend when passing from air to water.

Explanation:

Refraction is the phenomenon of bending of light when it passes from one medium to another.

Reflection is the phenomenon of bouncing back of light from a surface.

When light enters from air to water i.e it is moving from rarer to denser medium, it changes its original path as there is a change of speed of light and deflects itself towards the normal. This is known as the refraction of light and this is why a pencil in a cup of water looks as if it is broken and larger.

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How many atoms are in a solid piece of iron that has a mass of 24.0g?
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55.84 g ------------ 6.02x10²³ atoms
24.0 g ------------- ??

24.0 x ( 6.02x10²³) / 55.84

=> 2.58x10²³ atoms
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4 0
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The rising and setting of the moon is mostly caused by?
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Pre-Lab Study Questions / 9
jok3333 [9.3K]

Answer:

See detailed answer with explanation below.

Explanation:

Valence electrons are electrons found on the outermost shell of an atom. They are the electrons in an atom that participate in chemical combination. Recall that the outermost shell of an atom is also referred to as its valence shell. Let us consider an example; if we look at the atom, sodium-11, its electronic configuration is 2,8,1. The last one electron is the valence electron of sodium which is found in its outermost or valence shell.

Positive ions are formed when electrons are lost from the valence shell of an atom. For instance, if the outermost electron in sodium is lost, we now form the sodium ion Na^+ which is a positive ion. Positive ions possess less number of electrons compared to their corresponding atoms.

Negative ions are formed when one or more electrons is added to the valence shell of an atom. A negative ion possesses more electrons than its corresponding atom. For example, chlorine(Cl) contains 17 electrons but the chloride ion (Cl^-) contains 18 electrons.

In molecular compounds, a bond is formed when two electrons are shared between the bonding atoms. Each bonding atom may contribute one of the shared electrons (ordinary covalent bond) or one of the bonding atoms may provide the both shared electrons (coordinate covalent bond). The shared pair may be located at an equidistant position to the nucleus of both atoms. Similarly, the electron may be drawn closer to the nucleus of one atom than the other (polar covalent bond) depending on the electro negativity of the two bonding atoms.

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