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3 years ago

11

Which of the following statement best describes wavelength?

2 answers:

vazorg [7]3 years ago

6 0

I believe it is (C)

Alex73 [517]3 years ago

4 0

Answer:

The answer is C

Explanation:

I learned this in Physical Science and I remember the teacher saying that!!!!

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1. Water vapor has_________ energy because it is a __________.

natulia [17]

Water vapor has more energy because it is a gas :)

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3 years ago

Select the correct answer from each drop-down menu. In a voltaic cell, the electrons and is oxidized, while the electrons and is

KengaRu [80]

Given what we know, we can confirm that in a voltaic cell, the anode loses electrons and is oxidized, meanwhile, the cathode is reduced by gaining electrons.

<h3 /><h3>What is a voltaic cell?</h3>

It is described as an electrochemical cell.
These cells use chemical reactions to produce electrical energy.
During this reaction, an anode loses electrons, thus oxidizing.
Meanwhile, the cathode gains electrons and is reduced.

Therefore, given the nature of the voltaic cell, we can confirm that during its reaction, the anode is oxidized by losing electrons while the cathode becomes reduced by gaining them.

To learn more about electrical energy visit:

brainly.com/question/863273?referrer=searchResults

3 0

2 years ago

An atom can be compared to our solar system because: WILL MAKE BRAINLIEST!

Sindrei [870]

Answer:

uh i think its D All of the above

Explanation:

sorry if its wrong

5 0

3 years ago

Which is more soluble at 28

CaHeK987 [17]

Answer:

a.

Explanation:

At 28 degrees highest line is CaCl2. Answer a.

3 0

3 years ago

Read 2 more answers

Sodium metal reacts with water to produce hydrogen gas and sodium hydroxide according to the chemical equation shown below.

UNO [17]

<u>Answer:</u> The enthalpy change of the reaction is -361.6 kJ

<u>Explanation:</u>

To calculate the number of moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$

Moles of sodium = 0.025 moles

Molar mass of sodium = 23 g/mol

Putting values in above equation, we get:

$0.025mol=\frac{\text{Mass of sodium}}{23g/mol}\\\\\text{Mass of sodium}=(0.025mol\times 23g/mol)=0.575g$

We are given:

Mass of water = 100.00 g

Mass of sodium = 0.575 g

Mass of solution = 100.00 + 0.575 = 100.575 g

To calculate the amount of heat absorbed, we use the equation:

$q=m\times C\times \Delta T$

where,

q = amount of heat absorbed = ?

m = mass of solution = 100.575 g

C = specific heat capacity of solution = 4.18 J/g°C

$\Delta T$ = change in temperature = $(T_2-T_1)=(35.75-25.00)=10.75^oC$

Putting all the values in above equation, we get:

$q=100.575g\times 4.18J/g^oC\times 10.75^oC=4519.34J=4.52kJ$

When heat is absorbed by the solution, this means that heat is getting released by the reaction.

<u>Sign convention of heat:</u>

When heat is absorbed, the sign of heat is taken to be positive and when heat is released, the sign of heat is taken to be negative.

For the given chemical reaction:

$2Na(s)+2H_2O(l)\rightarrow NaOH(aq.)+H_2(g)$

When 0.025 moles of sodium is reacted, the heat released by the reaction is 4.52 kJ

So, when 2 moles of sodium will react, the heat released by the reaction will be = $\frac{4.52}{0.025}\times 2=361.6kJ$

Hence, the enthalpy change of the reaction is -361.6 kJ

6 0

3 years ago