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larisa86 [58]
3 years ago
5

Give one example of reflection (sound or light)

Chemistry
1 answer:
Angelina_Jolie [31]3 years ago
7 0

Answer:

The example of reflection of light is surface of smooth pool of water and the example of reflection of sound is echo.

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Arrange the bromine-containing compounds CaBr2, Br2, NBr3, CBr4 in order of increasing predicted boiling point.
Fudgin [204]

Explanation:

In an ionic compound, there will be strong force of attraction between the combining atoms due to the opposite charges present on them.

For example, CaBr_{2} is an ionic compound where calcium has a +2 charge and each bromine atom has a -1 charge.

Therefore, in order to break the bond we need to provide more heat. Hence, boiling point of calcium bromide will be the highest.

NBr_{3} is a covalent compound and as nitrogen is more electronegative in nature and also has a lone pair of electron hence, there will be a net dipole moment.

CBr_{4} is also a covalent compound. And, as bromine is more electronegative than carbon atom so, dipole moment is in the outwards direction. Hence, in CBr_{4} there will be zero dipole moment.

Therefore, its boiling is less than the boiling point of NBr_{3}.

Br_{2} is a covalent compound and there will be no dipole moment.

Thus, we can conclude that given bromine-containing compounds are placed in their increasing boiling point order as follows.

    Br_{2} < CBr_{4} < NBr_{3} < CaBr_{2}

3 0
4 years ago
Heat in the amount of 100 kJ is transferred directly from a hot reservoir at 1400 K (TH) to a cold reservoir at 600 K. Calculate
klasskru [66]

Answer:

ΔS = - 0.125 Kj/K decreased entropy

Explanation:

From ΔH = TΔS => ΔS = ΔH/T

= 100Kj/(600K - 1400K) = - 188Kj/800K = - 0.125 Kj/K

Entropy in the cooler flask would have 'decreased' (i.e.; more ordered state) at 600K.

6 0
3 years ago
A 2.0-liter volume of hydrogen gas combined with 1.0 liter of oxygen gas to produce 2.0 liters of water vapor. Does oxygen uderg
lidiya [134]
Oxygen undergoes a chemical change
8 0
4 years ago
Write a balanced equation for reaction:
zysi [14]

4 Ga (s) + 3 O₂ (g) → 2 Ga₂O₃ (s)

where:

(s) - solid

(g) - gas

Explanation:

At high temperature gallium (Ga) will react with oxygen gas (O₂) to produce solid gallium(III) oxide (Ga₂O₃).

Learn more about:

balancing chemical reactions

brainly.com/question/13824624

#learnwithBrainly

8 0
4 years ago
If there are the same number of argon atoms in one sample and the same number of carbon atoms in another, then the value of the
Art [367]

Answer:

c. 0.30

Explanation:

One C atom has a mass of 12.0 u and one Ar atom has a mass of 40.0 u.

Let’s assume that there are <em>n</em> atoms of C and <em>n</em> atoms of Ar. Then

Mass of <em>n</em> C atoms = <em>n</em> × 12.0

Mass of <em>n</em> C atoms = 12.0<em>n</em> u

Mass of <em>n</em> Ar atoms = <em>n</em> × 40.0

Mass of <em>n</em> Ar atoms = 40.0<em>n</em> u

ratio = mass of C/mass of Ar

ratio = 12.0<em>n</em>/40.0<em>n </em>

ratio = 0.300

8 0
3 years ago
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