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3 years ago

10

A model that shows the many interconnected feeding relationships in an ecosystem is a food

2 answers:

Anna007 [38]3 years ago

4 0

It would have to be food web.

Lorico [155]3 years ago

3 0

It's a food web. A food web connects the foods that certain organisms can eat.

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In which time period did Ancient Greek philosophers propose that all matter was composed of four fundamental substances: earth,

koban [17]

<span>This theory was suggested around 450 BC</span>

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3 years ago

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What is a hot spot? ( Must be in your own words) Pleaseeee Hurryy

Ilia_Sergeevich [38]

Answer:

A hot spot is an area on Earth over a mantle plume or an area under the rocky outer layer of Earth, called the crust, where magma is hotter than surrounding magma. The magma plume causes melting and thinning of the rocky crust and widespread volcanic activity.

Hope this is what you mean be hot spot!

I hope this helps you!

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3 years ago

What is the oxidation number of S in Li2SO4?

viktelen [127]

+6 is the answer i believe

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3 years ago

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Pyridine is a weak base that is used in the manufacture of pesticides and plastic resins. It is also a component of cigarette sm

Luda [366]

Answer:

pH of the solution = 9.45

Explanation:

pKb = 8.57

pKb = -logKb

Kb = antilog pkb

$K_b = 1.78 \times 10^{-9}$

ICE table for the ionization of pyrodine is:

$C_5H_5N+H_2O \leftrightharpoons C_5H_5NH^+ + OH^-$

initial 0.435 0 0

equi. 0.435 - x x x

so,

$k_b =\frac{ [C_5H_5NH^+][OH^-]}{[C_5H_5N]}\\1.78\times 10^{-9}=\frac{x^2}{0.453 - x}$

As kb is very less that means there is very less ionization, hence x can be ignored as compared to 0.435

$x^2 = 1.78\times 10{-9} \times 0.435\\x= 2.78\times 10^{-5}$

pOH = -log[OH-]

$pOH = -log[2.78\times 10^{-5}]\\=4.55$

pH = 14 - pOH

= 14 - 4.55

= 9.45

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4 years ago

The following diagram of a pendulum shows the path it takes as it swings back and forth.

lbvjy [14]

I believe it should be B

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4 years ago

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