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3 years ago

Which symbol and unit of measurement are used for electric current?

Chemistry

1 answer:

jolli1 [7]3 years ago

4 0

Answer:

C. symbol: 1; unit: A

Explanation:

The symbol and unit of electric current is given as symbol: I; unit: A

Current is one of the fundamental particles.
The unit is given in Amperes which is symbolized as A.
Current is given as I

According to ohms law;

I = $\frac{V}{R}$

I is the current

V is the voltage

R is the resistance.

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Part A Find ΔS∘ for the reaction between nitrogen gas and hydrogen gas to form ammonia: 12N2(g)+32H2(g)→NH3(g) Express your answ

inessss [21]

Answer:

$\Delta S^{0}$ for the given reaction is -99.4 J/K

Explanation:

Balanced reaction: $\frac{1}{2}N_{2}(g)+\frac{3}{2}H_{2}(g)\rightarrow NH_{3}(g)$

$\Delta S^{0}=[1mol\times S^{0}(NH_{3})_{g}]-[\frac{1}{2}mol\times S^{0}(N_{2})_{g}]-[\frac{3}{2}mol\times S^{0}(H_{2})_{g}]$

where $S^{0}$ represents standard entropy.

Plug in all the standard entropy values from available literature in the above equation:

$\Delta S^{0}=[1mol\times 192.45\frac{J}{mol.K}]-[\frac{1}{2}mol\times 191.61\frac{J}{mol.K}]-[\frac{3}{2}mol\times 130.684\frac{J}{mol.K}]=-99.4J/K$

So, $\Delta S^{0}$ for the given reaction is -99.4 J/K

7 0

4 years ago

What does an electromagnetic spectrum refer to?

Juliette [100K]

The entire distribution of electromagnetic radiation according to frequency or wavelength

7 0

3 years ago

If your good at science you could help me out so much!

Andrei [34K]

Answer:

Potassium (K) and Lithium (Li) for the fist one i cant see the second

Explanation:

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3 years ago

2. Which situation best represents conduction?

ikadub [295]

Answer:

Explanation:

touching a hot piece of metal. because the energy or the hotness of the pot is touching your hand which is a direct contact.

8 0

3 years ago

In which reaction is precipitation occurring?

Trava [24]

Answer:- B. $CdSO_4(aq)+K_2S(aq)\rightarrow CdS(s)+K_2SO_4(aq)$

Explanations:- A precipitation reaction is a double displacement reaction in which a solid salt is formed.

If we look at all the given equations then it's only second reaction in which a solid salt (CdS) is formed. In rest of the reactions there is no solid salt formed.

It means A, C and D are not the right choices and so the correct choice is only B.

Here the phase are given for all the products. If the phases are not given then we use the solubility chart to see which reactions would form the precipitate.

Since, the precipitate is formed only in second equation, the correct choice is B.

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4 years ago