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3 years ago

Is the following equation balanced? Zn + 2HCl → ZnCl₂ + H₂

Chemistry

1 answer:

lutik1710 [3]3 years ago

7 0

Answer:

Yes it's balanced

Explanation:

on the left side, it contains

1 zn and 2 hydrogen and 2 chlorine

while on the right side it contains

1 zn 2 chlorine and 2 hydrogen

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the internal energy of an ideal gas depends only on its temperature. Do a first-law analysis of this process. A sample of an ide

Aleks04 [339]

Answer:

Check Explanation

Explanation:

The Mathematical expression of the first law is given as

ΔU = Q - W

Note that depending on convention, the mathematical expression for the first law can be written as

ΔU = Q + W

a) Yes, the gas does work on its surroundings. Since it expands; indicating that there is a change in volume.

The work done is given as -PΔV if we are using the convention of (ΔU = Q + W). And this work is negative work done, since the system expands and does work on the surroundings.

But if we are using the convention of (ΔU = Q - W), the work done is given as PΔV and the workdone by the system on the environment is positive work during expansion.

b) Since this all takes place at constant temperature and against a constant atmospheric pressure, the change in internal energy for this system is 0. Change in internal energy depends on a change in temperature.

So, from the mathematical expression,

ΔU = Q + W or ΔU = Q - W

If ΔU = 0,

Q = - W or Q = W

But either ways,

Q = PΔV

(because, W = -PΔV for ΔU=Q+W and W = PΔV for ΔU=Q-W)

So, either ways, the heat transfer is the same and it is positive. This indicates heat is transferred from the surroundings to the system.

Since this all takes place at constant temperature and against a constant atmospheric pressure, the change in internal energy for this system is 0. Change in internal energy depends on a change in temperature.

Hope this Helps!!!

8 0

4 years ago

Consider the nuclear equation below. 15/8 O ==> 15/7 N + 0/+1 e Which correctly identifies the type of reaction?

sweet [91]

B: Beta plus Decay :)

6 0

3 years ago

The action force always acts in the ____ direction as the reaction force

andriy [413]

Answer:

opposite

Explanation:

Newtons law explains that for every action force there is an equal and opposite reaction.

6 0

4 years ago

Organize the following elements in order of increasing atomic radius (Ge, He, Sr, O, Ba)

Katen [24]

Answer:

Explanation:

An atom gets larger as the number of electronic shells increase; therefore the radius of atoms increases as you go down a certain group in the periodic table of elements.

In general, the size of an atom will decrease as you move from left to the right of a certain period.

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3 years ago

Identify the two types of radiation shown in the figure below. Explain your reasoning.

saul85 [17]

Answer:- $\gamma$ and $\alpha$ radiation.

Explanations:- Alpha particle is helium nucleus with two protons and two neutrons and so it has +2 charge where as gamma is a form of light, so these are rays and not particles. Since these are rays, the charges for gamma rays is zero means they are neutral.

When alpha particles are passed through electromagnetic field they are repelled by the positive plate and attracted by the negative plate as there is an attraction between opposite charges. So, the line we see towards positive plat is representing an alpha particle radiation.

Since gamma rays are neutral, they are not deflected in electromagnetic field and go straight. So, the other line in the diagram is representing gamma rays radiation.

5 0

3 years ago

Read 2 more answers