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NISA [10]
3 years ago
7

Can someone please help me!!!

Chemistry
1 answer:
LUCKY_DIMON [66]3 years ago
6 0

sorry but I don't know so sorry

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Why is conical flask used in the freezing point of naphthalene activity?
SpyIntel [72]

Answer:

D. To ensure the cooling process is not affected by surrounding temperature

Explanation:

The conical flask acts as a <u>t</u><u>e</u><u>m</u><u>p</u><u>e</u><u>r</u><u>a</u><u>t</u><u>u</u><u>r</u><u>e</u><u> </u><u>j</u><u>a</u><u>c</u><u>k</u><u>e</u><u>t</u><u>.</u>

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2 years ago
Determine the percent composition by mass of a 100g salt solution which contains 20g salt
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Answer:

Mass of solution=100g

mass of salt=20g

so; mass of solute=80g

percentage composition =(mass of salt/total

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glad to help you

hope it helps

8 0
3 years ago
Read 2 more answers
What process removes carbon dioxide from the ocean?
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Answer:

B. decay of dead marine organisms

Explanation:

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3 years ago
Darkness conceals hazards such as
Studentka2010 [4]
Same I agree with this mans statement good job bro bro I'm just trynna finish this thing so I got 100 on this app
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3 years ago
Which of the following processes have a ΔS &lt; 0? Which of the following processes have a ΔS &lt; 0? carbon dioxide(g) → carbon
Umnica [9.8K]

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All of the above processes have a ΔS < 0.

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ΔS represents change in entropy of a system. Entropy refers to the degree of disorderliness of a system.

The question requests us to identify the process that has a negative change of entropy.

carbon dioxide(g) → carbon dioxide(s)

There is  a change in state from gas to solid. Solid particles are more ordered than gas particles so this is a negative change in entropy.

water freezes

There is  a change in state from liquid to solid. Solid particles are more ordered than liquid particles so this is a negative change in entropy.

propanol (g, at 555 K) → propanol (g, at 400 K)

Temperature is directly proportional to entropy, this means higher temperature leads t higher entropy.

This reaction highlights a drop in temperature which means a negative change in entropy.

methyl alcohol condenses

Condensation is the change in state from gas to liquid. Liquid particles are more ordered than gas particles so this is a negative change in entropy.

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