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3 years ago

Pls help asap im timed

Biology

1 answer:

Kaylis [27]3 years ago

3 0

Answer:

B. A small fraction of the energy is transferred to higher trophic levels, majority stays in the lower trophic levels

Explanation:

Energy transfer between trophic levels is insufficient. When an organism is eaten by another organism, not all of the biomass of prey forms the biomass of the predator. Majority of the energy is released into environment during cellular respiration. Some of the matter also remains undigested and is not used by the predator. Thus, only 10% of energy available at one level is transferred to the next level. So when we keep on moving up in a food chain, energy available keeps on decreasing.

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M+ is an unknown metal cation with a +1 charge. A student dissolves the chloride of the unknown metal, MCl, in enough water to m

Simora [160]

Looks like you're missing an answer choice. I have this question on my practice test for AP Chemistry, the correct answer would be KCl.

mass AgCl = 2.23 - 0.80 = 1.43g AgCl

1.43g AgCl / 143g/mol AgCl = 0.01 moles AgCl

- AgCl has a mole ratio of 1:1 so:

moles Ag+ = moles Cl-, therefore Ag+ has 0.01 moles and Cl- has 0.01 moles

- MCl also has a 1:1 ration

moles Cl- = moles M+

- 0.01 moles of M+ and Cl-

0.01 Cl- = x/35.45 = 0.3545g Cl-

mass MCl = 0.74g

0.74g MCl - 0.3545g Cl- = 0.3955g M+

0.3955g M+/x =0.010 mol M+

x= 39.55g M+

K+ has a molar mass of approximately 39.10

Therefore KCl is your answer

6 0

3 years ago

Read 2 more answers

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fiasKO [112]

This prokaryote belongs to the archaea domain, which is known for containing prokaryotes that can withstand scorching temperatures and extremely high levels of saline (ex: The Dead Sea)

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PIT_PIT [208]

Answer:

Explanation:

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