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GalinKa [24]
3 years ago
14

Please help i need help with this (if you can’t see the last one it says thermal)

Chemistry
1 answer:
LUCKY_DIMON [66]3 years ago
3 0

Answer:

it would have sound a

thermal .why a train needs coal and coal get burned by heat that is thermal energy and sound beacuse a train makes sound by moving

Explanation:

have a good day /night

may i please have a branlliest

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ikadub [295]
\Delta G_{global}=\Delta G_{products}-\Delta G_{reagents}\\\\
\text{We should consider the stoichiometry:}\\\\
\Delta G=2\Delta G_{NO_2}-\Delta G_{N_2O_4}\\\\
\Delta G=2\cdot51.8-98.28=103.6-98.28\\\\
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4 0
2 years ago
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Zinc sulfate is a 2-ion electrolyte,
Gekata [30.6K]

<u>Answer:</u> The value of <em>i</em> is 1.4 and 40% dissociation of 100 particles of zinc sulfate will yield 60 undissociated particles.

<u>Explanation:</u>

The equation used to calculate the Vant' Hoff factor in dissociation follows:

\alpha =\frac{i-1}{n-1}

where,

\alpha = degree of dissociation = 40% = 0.40

i = Vant' Hoff factor

n = number of ions dissociated = 2

Putting values in above equation, we get:

0.40=\frac{i-1}{2-1}\\\\0.40=i-1\\\\i=1.4

The equation used to calculate the degee of dissociation follows:

\alpha =\frac{\text{Number of particles dissociated}}{\text{Total number of particles taken}}

Total number of particles taken = 100

Degree of dissociation = 40% = 0.40

Putting values in above equation, we get:

0.40=\frac{\text{Number of particles dissociated}}{100}\\\\\text{Number of particles dissociated}=(0.40\times 100)=40

This means that 40 particles are dissociated and 60 particles remain undissociated in the solution.

Hence, 40% dissociation of 100 particles of zinc sulfate will yield 60 undissociated particles.

7 0
2 years ago
Which of the following demonstrates the role of chemistry in getting ready for
Nina [5.8K]

Hot and cold water can be mixed together to make warm water is the correct statement that shows role of chemistry.

<h3>What demonstrates the role of chemistry?</h3>

Hot and cold water can be mixed together to make warm water is the statement that demonstrates the role of chemistry in getting ready for school in the morning because it describes the features of warm water. It also shows the method of getting warm water from mixing of hot and cold water.

So we can conclude that Hot and cold water can be mixed together to make warm water is the correct statement that shows role of chemistry.

Learn more about mixture here: brainly.com/question/24647756

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5 0
1 year ago
Which statement is true? Energy cannot be created or destroyed. Energy can be destroyed but not created. Energy can be created b
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Energy can not be created and cannot be destroyed
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3 years ago
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How many moles of ethane (C2H6) would be needed to react with 62.3 grams of oxygen gas?
Vladimir [108]
Note that it says oxygen "gas"
So you need the atomic mass of oxygen gas

Look at your periodic table, you'll see 15.9994 under oxygen
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Thus as we have 1.95 moles of O2, we need 1.95 moles of C2H6
5 0
3 years ago
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