What are all 4 levels of the energy pyramid? HELP ASAP

Chemistry

2 answers:

NISA [10]3 years ago

7 0

Producer, Primary consumers, Secondary consumers and Tertiary consumers.

sammy [17]3 years ago

3 0

I'm writing this in the structure of an actual pyramid.

Tertiary Consumers -- Top of the food chain
Secondary Consumers
Primary Consumers -- This is the start of heterotrophs.
Producers -- Bottom of the food chain, these are the plants/autotrophs.

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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

3 years ago

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