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arlik [135]
2 years ago
9

A student with a body temperature of 37°C holds a piece of

Chemistry
2 answers:
Alika [10]2 years ago
6 0

Answer:

D i think. Not sure.

Explanation:

I mean i just did it myself, and i dont really do chemistry, but I would say D sorrry if i made you get it wrong!!

AVprozaik [17]2 years ago
5 0

Answer:

C. Heat transfers thermal energy from the student's hand to the ice.

Explanation:

I got it right on my test apix

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Crude oil is derived from which of the following materials?
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What is the mass of 5 mole of ammonia . Calculate the number of NH₃ molecules, nitrogen atom and hydrogen atoms in it..
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Molar mass of NH_3

\\ \sf\longmapsto 14u+3(1u)

\\ \sf\longmapsto 14u+3u

\\ \sf\longmapsto 17g/mol

We know.

No of moles=Given mass/Molar mass

\\ \sf\longmapsto Given\;Mass=17(5)

\\ \sf\longmapsto Given \:Mass\:of\:NH_3=85g

Now

Lets write the balanced equation

\\ \sf\longmapsto N_2+3H_2=2NH_3

  • There is 2moles of Ammonia
  • 3moles of H_2
  • 1mole of N_2

Now

\boxed{\sf No\:of\:Molecules =No\:of\;moles\times Avagadro\:no}

For Hydrogen

\\ \sf\longmapsto 3\times 6.023\times 10^{23}

\\ \sf\longmapsto 18.069\times 10^{23}

\\ \sf\longmapsto 1.8\times 10^{22}molecules

For Ammonia

\\ \sf\longmapsto 2\times 6.023\times 10^{23}

\\ \sf\longmapsto 12.046\times 10^{23}

\\ \sf\longmapsto 1.2\times 10^{22}molecules

For Nitrogen

\\ \sf\longmapsto 1\times 6.023\times 10^{23}

\\ \sf\longmapsto 6.023\times 10^{23}molecules

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2 years ago
A Solute is the part of the mixture that is<br> A. dissolved<br> B.used to dissolve a substance
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It is the thing being dissolved!!
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3 years ago
H<br> fygykg,hyf<br> ggyhgfsdyhcjsgvfufdgyvyghxhjlkfdhgjkygucdsgyifdc<br> \
kirza4 [7]

Well thats a pretty difficult question, I think the answer might be 4

7 0
3 years ago
Read 2 more answers
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