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3 years ago

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 n atoms of C and n atoms of Ar. Then

Mass of n C atoms = n × 12.0

Mass of n C atoms = 12.0n u

Mass of n Ar atoms = n × 40.0

Mass of n Ar atoms = 40.0n u

ratio = mass of C/mass of Ar

ratio = 12.0n/40.0n

ratio = 0.300

8 0

3 years ago