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baherus [9]
3 years ago
11

Voltalc cells produce a positive overall charge. What does this indicate?

Chemistry
2 answers:
PtichkaEL [24]3 years ago
8 0

Answer:

B. The reaction is spontaneous.

Explanation:

Edmentum

Harman [31]3 years ago
7 0

Answer:

The reaction is spontaneous.

Explanation:

If voltaic cell show positive charge it means reaction is spontaneous taking by itself.

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jasenka [17]
B the answer is letter b
8 0
3 years ago
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Do you think a written explanation or a detailed drawing is most useful in explaining rain shadows
galina1969 [7]
I would say detailed drawing, but it is up to you
3 0
4 years ago
When 0.5141 g of biphenyl (C12H10) undergoes combustion in a bomb calorimeter, the temperature rises from 25.823 °C to 29.419 °C
natka813 [3]

Answer:

\Delta_{r}U of the reaction is -6313 kJ/mol

\Delta_{r}H of the reaction is -6312 kJ/mol

Explanation:

Temperature\,\,change= \Delta U = 29.419-25.823 =3.506^{o}C

q_{cal}= C \times \Delta T

=5.861 \times 3.596 = 21.076\,kJ

q_{rxn}= -q_{cal}= -21.076\,kJ

\Delta_{r}U= -21.076 \times \frac{154}{0.5141}= -6313\, kJ/mol

Therefore, \Delta_{r}U of the reaction is -6313 kJ/mol.

The chemical reaction in bomb calorimeter  is as follows.

C_{12}H_{10}(s)+\frac{27}{2}O_{2}(g)\rightarrow 12CO_{2}(g)+5H_{2}O(g)

Number\,of\,moles\Delta n=(12+5)-\frac{27}{2}=3.5

\Delta_{r}H=\Delta E+ \Delta n. RT

=-6313+3.5\times 8.314\times 10^{-3} \times 3.596=-6312\,kJ/mol

Therefore, \Delta_{r}H of the reaction is -6312 kJ/mol.

3 0
3 years ago
An electromagnetic wave has a wavelength of 4000 meters. What is this wave length and scientific notation?
zubka84 [21]

Answer:

Wavelength of electromagnetic wave = 4.0 × 10³

Explanation:

Given:

Wavelength of electromagnetic wave = 4000 meter

Find:

Write, Wavelength of electromagnetic wave into scientific notation

Computation:

Wavelength of electromagnetic wave = 4000 meter

Wavelength of electromagnetic wave = 4.0 × 1,000 meter

Wavelength of electromagnetic wave = 4.0 × 10³

So,

Option "B" is the correct answer to the following question.

8 0
3 years ago
Which of the following statements is true?
frez [133]
Answer: D

Explanation: Convection transfers heat by movement such as air and water.
3 0
3 years ago
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