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svetoff [14.1K]
3 years ago
13

The law of reflection states that the angle of incidence equals the angle of reflection. Define the angle of incidence in terms

of a line normal to the surface.
Chemistry
1 answer:
mihalych1998 [28]3 years ago
3 0
Answer : According to the definition of law of refelection "<em>It is </em><span><em>the principle in which, when a ray of light or radar or pulse, is shined on a smooth surface it is reflected back from the smooth surface and the angle of reflection will be equal to the angle of incidence, also the incident ray, the reflected ray, and the normal to the surface at the point of incidence all will lie in the same plane."

</em>So we can define angle of incidence as - The angle which is formed between the incident ray and the smooth surface of substrate is called angle of incidence and the incident ray will be always intersecting at the point of normal with the reflected ray. So the normal is an imaginary line which is perpendicular to the smooth surface of the substrate which bisects the ray of incidence and forms the angle of incidence also it bisects the ray of reflection and forms angle of reflection.</span>
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Which isotope has the greatest number of protons?
tino4ka555 [31]

Answer:

The isotope with the greatest number of protons is:

  • <u>option D:  Pu-239, with 94 protons</u>

Explanation:

The number of <em>protons</em> is the atomic number and is a unique number for each type of element.

You can tell the number of protons searching the element in a periodic table and reading its atomic number.

Thus, this is how you tell the number of protons or each isotope

Sample       Chemical symbol  Element       atomic number   # of protons

A Pa-238       Pa                         protactinium         91                        91

B U-240         U                          uranium                 92                       92

C Np-238       Np                        neptunium            93                       93

D Pu-239        Pu                        plutonium              94                       94

8 0
3 years ago
A mixture of 0.10 mol of NO, 0.050 mol of H2, and 0.10 mol of H2O is placed in a 1.0-L vessel at 300 K. The following equilibriu
tatyana61 [14]

Answer:

[H2] =    0.012 M

[N2] =    0.019 M

[H2O] =  0.057 M

Explanation:

The strategy here is to account for the species at equilibrium given that the concentration of [NO]=0.062M at equilibrium is known and the quantities initially present and its stoichiometry.

                  2NO(g)         +    2H2(g)    ⇒        N2(g)      +         2H2O(g)

i  mol            0.10                   0.050                                             0.10

c mol            -0.038                -0.038                +0019                +0.038                                                

e mol            0.062                 0.012                  00.019               0.057

Since the volume of the vessel is 1.0 L, the concentrations in molarity are:

[NO] =   0.062 M

[H2] =    0.012 M

[N2] =    0.019 M

[H2O] =  0.057 M

5 0
2 years ago
Select the correct answer.
zaharov [31]

C. a long chain of carbon atoms with hydrogen atoms attached to them.

Explanation:

3 0
2 years ago
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How many miles can a commercial jetliner flying at 253 meters per second travel in 6.0 hours?
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The Jetliner will travel a total of 1518 meters if flying for 6 hours.
6 0
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How many grams of KBr is required to prepare 100 mL of<br> 2.0 M KBr solution?
sesenic [268]

Answer:

23.8g

Explanation :

Convert 2.0M into mol using mol= concentration x volume

2.0M x 0.1L (convert 100mL to L since the units for M is mol/L)

= 0.2 mol

We can now find grams by using the molar mass of KBr

=119.023 g/mol (Found online) webqc.org

but can be be calculated by using the molecular weight of K and Br found on the periodic table

We can now calculate the grams by using grams=mol x molar mass

119.023g/mol x 0.2mol

= 23.8046 g

=23.8g (rounded to 1decimal place)

4 0
2 years ago
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