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3 years ago

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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If an isotope of uranium, uranium-235, has 92 protons, how many protons does the isotope uranium-28 have?

padilas [110]

92. A<span>ll </span>isotopes<span> of uranium have the same number of protons</span>

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3 years ago

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Natasha_Volkova [10]

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2 years ago

Read 2 more answers

Explain why mixing of red paint with white paint does not constitute a chemical reaction even though the product has a different

MArishka [77]

Answer:

Explanation:

In a chemical change through chemical reactions, a new kind of matter forms. When a paint is mixed together, a physical change has occurred and not a chemical change. The different color one perceives is just a mere overlap between the reflected white and red color which produces another hue.

Not all color changes infers a chemical reaction. A paint is a complex mixture on its own.

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3 years ago

Salt dissolved in water is a solution, therefore _____.

saveliy_v [14]

Answer: Correct options are as follows.

salt is not chemically bonded to water.

salt and water retain their own chemical properties.

Explanation:

When salt is dissolved in water then it means that it is a physical change as salt has completely dissociated into ions but they are not chemically combined to the water molecules.

As a result, both salt and water will retain their chemical properties.

For example, NaCl when dissolved in water will dissociate as follows.

$NaCl \rightarrow Na^{+} + Cl^{-}$

Only the particles of salt have evenly distributed in water.

And, when a components of a salt chemically combine with another substance then it will form a new compound.

Therefore, we can conclude that salt dissolved in water is a solution, therefore:

salt is not chemically bonded to water.

salt and water retain their own chemical properties.

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3 years ago

How many moles are in 260g of Al2(SO3)3 x 4H20

Basile [38]

M=260 g
M=414.215 g/mol

n=m/M

n=260 g / 414.215 g/mol = 0.6277 mol

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3 years ago