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AfilCa [17]
3 years ago
11

HELP ITS OVER DUE AND GRADE BOOK ENDS MARCH 5TH

Chemistry
1 answer:
Ymorist [56]3 years ago
4 0
Mutualism- both organisms benefit
Commensalism- one organism benefits while the other neither is harmed or helped
Parasitism- one organism is benefited while the other is harmed

4 P (flea benefits but dog is harmed)
5 M (both get to eat the honey)
6 C (bird gets a place to live without harming or helping the tree)
7 P (lice get a place to live but humans are harmed)
8 M (both are helped)
9 C (flower isn’t harmed or helped but bee is helped)
10 P (the tree is harmed but the mistletoe is benefitted)
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A solution is prepared by mixing 25.0 g H2O and 25.0 g C2H5OH. Determine the mole fractions of each substance.
Veronika [31]

Answer:

Mole fraction H₂O → 0.72

Mole fraction C₂H₅OH → 0.28

Explanation:

By the mass of the two elements in the solution, we determine the moles of each:

25 g . 1 mol/ 18g = 1.39 moles of water (solute)

25 g . 1 mol / 46 g = 0.543 moles of ethanol (solvent)

Mole fraction solute = Moles of solute / Total moles

Mole fraction solvent = Moles of solvent / Total moles

Total moles = Moles of solute + Moles of solvent

1.39 moles of solute + 0.543 moles of solvent = 1.933 moles → Total moles

Mole fraction H₂O = 1.39 / 1.933 → 0.72

Mole fraction C₂H₅OH= 0.543 / 1.933 → 0.28

Remember that sum of mole fractions = 1

8 0
2 years ago
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Name 3 objects found in the Milky Way galaxy.
dolphi86 [110]

Answer:

The Earth, Stars, and Mars I guess...

5 0
3 years ago
What is one difference between a mixture and a compound?
tekilochka [14]
D. a compound can only be separated into its components by chemical means
5 0
3 years ago
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What are the stable isotopes of carbon?
andreyandreev [35.5K]
Answer:

The stable isotopes of carbon are carbon-12 (12C) and carbon-13 (13C).

I hope this helps! :)
3 0
3 years ago
Name two methods of separating mixtures. Describe the property each of these separations based
grigory [225]

Answer:

Distillation and using Chromatography

Explanation:

Distillation:

based on using boiling point.

Ex: separating a mixture of water and sugar by boiling the water away.

Chromatography:

based on absorption

Ex: separating the different colours that make up a black marker

8 0
3 years ago
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