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Darina [25.2K]
3 years ago
13

What two things must occur in order for a light ray to refract when it strikes

Chemistry
1 answer:
Ann [662]3 years ago
3 0

Answer:

When light passes from one transparent medium to another, the rays are bent toward the surface normal if the speed of light is smaller in the second medium than in the first. The rays are bent away from this normal if the speed of light in the second medium is greater than in the first.

Explanation:

pls make me brainliest

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Enough of a monoprotic acid is dissolved in water to produce a 1.35 M solution. The pH of the resulting solution is 2.93. Calcul
Ede4ka [16]
The acid dissociation constant is defined as Ka = [H+][A-]/[HA] where [H+], [A-] and [HA] are the concentrations of protons, conjugate base, and acid in solution respectively. Assuming this is a weak acid as the pH is quite high for a 1.35 M solution, we can assume that the change in [HA] is negligible and therefore [HA] = 1.35 M.
To calculate [H+] we can use the relationship pH = -log[H+], rearranging to give: [H+] = 10^(-pH) = 10^(-2.93) = 1.17 x 10^(-3).
Since the acid is relatively concentrated we can assume therefore that       [H+] = [A-] as for each proton dissociated, a conjugate base is formed.
Therefore, we can calculate Ka as:
Ka = [H+]^2/[HA] = (1.17 x 10^-3 M)^2/1.35 = 1.01 x 10^-6 M
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3 years ago
What parts are present in every chemical equation?
77julia77 [94]
I believe it’s

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3 0
3 years ago
¿Cuál(es) de las siguientes propiedades aumentan a más Z en un grupo?
liq [111]

Answer:

The correct answer is c) Electronegativity

Explanation:

The Z corresponds to the atomic number (defines the number of protons in the nucleus and also the electrons present in the atom). The Z increases from left to right in the same period, this is due to less shielding of the electrons in the last layer. Electronegativity (defined as the ability of the atoms to attract, in a covalent chemical bond, the electrons that it shares with other atoms), increases, the greater the Z (there is less distance).

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4 years ago
GIVING BRAINLIEST FOR RIGHT ANSWERS PLS HELP
Anuta_ua [19.1K]

Answer:

Answer: Chemical change; Chemical property of heat of combustion

Explanation:

A physical change is defined as a change in which there is alteration in shape, size etc. No new substance gets formed in these reactions.

Explanation:

4 0
3 years ago
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kobusy [5.1K]

Answer:

Answer is option D

Explanation:

The explanation is embedded in the word document attached

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3 years ago
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