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3 years ago

Based on Reference Table I, which change occurs when pellets of solid NaOH are added to water and stirred?

2 answers:

8 0

The correct answer is option 1. When pellets of solid NaOH are added to water and stirred, the temperature of water increases because chemical energy is converted into heat energy. Dissolution of sodium hydroxide in water is an exothermic process where heat is dissipated.

kicyunya [14]3 years ago

3 0

The correct answer is option 1, that is, the temperature of the water increases as chemical energy gets transformed into heat energy.

When the pellets of sodium hydroxide are mixed and stirred in water, the dilution of sodium hydroxide takes place, and then it gets dissociated into ions, the whole process is exothermic. The dissolution of sodium hydroxide is tremendously exothermic, the chemical burns as well as thermal burns can take place.

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What coefficients are needed to balance the following equation?<br><br> H2O + Fe Fe2O3 + H2

earnstyle [38]

H2O+Fe⇒Fe2O3+H2

When it is balanced it would be:

3H2O+2Fe⇒Fe2O3+3H2

When balancing equations, you have to make sure that all elements are equal on each side.

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3 years ago

Which element below is the most reactive? Hydrogen chlorine neon oxygen

trapecia [35]

Answer:

Chlorine

Explanation:

Chlorine has an atomic number of 17 and a configuration of 2, 8, 7. In the outermost shell, it has 7 seven electrons which means that it needs just one more electron to attain an octet configuration in that shell. Therefore it's can react quickly with any nearby nucleophile.

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3 years ago

Read 2 more answers

Which of the following is made of matter?

Sergio039 [100]

Answer:

the sun

Explanation:

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3 years ago

Read 2 more answers

What do these two changes have in common?

xz_007 [3.2K]

Answer:

Both are only physical changes.

Actually, sewing an apron and dust settling out of air are both physical changes, as an apron could be unseweed by cutting the thread used, and when we disturb the dust particles, the dust particles will fet mixed back in the air so both are physical changes.

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3 years ago

What multiplicities are observed for the signals in the off-resonance decoupled 13c nmr spectrum of (2e)-3-chloro acrylaldehyde?

Flauer [41]

The multiplicities that are observed for the signals in the off-resonance decoupled 13c nmr spectrum of (2e)-3-chloro acrylaldehyde is a singlet, a triplet, and a quartet. The correct option is E.

<h3>What is off-resonance decoupling?</h3>

Off-resonance decoupling is a process of removing all hydrogen and carbon coupling from a signal except for the place which is near the nucleus or joined with the nucleus.

In NMR also, the coupling of hydrogen and carbon is removed except for the place near the nucleus.

Thus, the correct option is E) a singlet, a triplet, and a quartet.

To learn more about off-resonance, refer to the link:

brainly.com/question/28169200

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The question is incomplete. Your most probably complete question is given below:

A) 2 singlets and a doublet

B) a singlet and 2 doublets

C) 3 singlets

D) a singlet, a doublet, and a triplet

E) a singlet, a triplet, and a quartet

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2 years ago