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mafiozo [28]
4 years ago
8

Write two balanced equations

Chemistry
1 answer:
yanalaym [24]4 years ago
7 0

Answer:

1. NaOH + H₂O → Na⁺ + OH⁻ + H₂O + heat

2. NaOH + HCl → NaCl + H₂O

Explanation:

1. The dissolving of NaOH in water is an exothermic reaction resulting a heat. It also causes the dissociation of NaOH to its ions (Na⁺ and OH⁻).

So, the balanced equation will be NaOH + H₂O → Na⁺ + OH⁻ + H₂O + heat.

2. The reaction between acid and base resulting salt and water. It is considered as a neutralization reaction.

The reaction between HCl and NaOH will give sodium chloride and water and the balanced equation will be NaOH + HCl → NaCl + H₂O.

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I think it’s 12 protons
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(c)
serg [7]

Answer:

Substance E does not conduct electricity in both solid and molten states because of very low melting and boiling points.

In both solid and molten state free electrons are required to conduct electricity. substance E has low boiling and melting point which means substance will have relatively weak bonds. Because of weak bonds substance E might not have much free electron in its outermost shell that can cause the electric current by their coordinated movement.

Hence, substance E is unable to conduct in both melting and molten state.

3 0
3 years ago
In the first law of thermodynamics, △E = Q-w, what does △E stand for?
Damm [24]

<u>Answer: </u>The correct answer is Option B.

<u>Explanation:</u>

First law of thermodynamics states that the energy can neither be destroyed not be formed but it can only be transformed from one form to another.

Here, the internal energy of the system is being transformed to the heat energy and the work done by the system. The equation used to represent first law of thermodynamic is:

\Delta E=Q-w

where,

\Delta E represents the internal energy of the system.

Q = heat released or absorbed by the system.

w = work done by or on the system.

Hence, the correct answer is Option B.

6 0
3 years ago
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Is a Daisy a prokaryote or a eukaryote
goldenfox [79]
<span>A daisy is a <em>eukaryote. </em>Because since the plant is a kingdom under the domain "Eukarya".
<em>~Hope this helped! :)</em></span>
7 0
3 years ago
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3. How many grams of aluminum can be heated from 90°C to 120°C if 500 J of heat energy are applied?
IgorLugansk [536]

<u>We are given:</u>

Initial Temperature = 90°c

Final Temperature = 120°c

Heat applied(ΔH) = 500 Joules

Specific heat(c) = 0.9 Joules / g°C

Mass of Aluminium(m) = ?

<u>Change in temperature:</u>

ΔT = Final temp. - Inital Temp.

ΔT = 120 - 90

ΔT = 30°c

<u>Calculating the mass:</u>

We know the formula:

ΔH = mcΔT

replacing the values:

500 = m(0.9)(30)

500 = m(27)

m = 500/27

m = 18.52 grams

5 0
3 years ago
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