CHEMISTRY HIGH SCHOOL

Which diagram below shows the pathway of energy through an ecosystem? A.producer → carnivore → herbivore

B.producer → herbivore → carnivore

C.herbivore → producer → carnivore

D.carnivore → herbivore → producer

Answers

Answer 1
Answer: the answer is B. producer,herbivore, carnivore 

Related Questions

"Henry mixed salt and water together in a cup until he observed a clear solution. He measured the mass of the solution. Then he placed the cup outside for several sunny days during the summer. After a week, he observed that only solid salt remained in the cup and the mass had decreased. Henry concluded that a physical and chemical change occurred in this investigation."Which statements correctly defend or dispute his conclusion?A.)He is correct. Dissolving salt in water is a physical change, but evaporating the water is a chemical change. Formation of a solid is evidence that a chemical change occurred.B.)He is correct. Evaporation is a physical change, but dissolving salt in water is a chemical change. The change in mass is evidence that a chemical change occurred.C.)He is incorrect. Dissolving salt in water and evaporation of the water are both physical changes. The reappearance of salt is evidence that the change was reversible by a physical change, so it could not be a chemical change.D.)He is incorrect. Dissolving salt in water and evaporation of the water are both chemical changes. The reappearance of salt is evidence that the change was reversible by a chemical change, so it could not be a physical change.
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Find the molar mass of vitamin A (C20H30O).

Answers

Just add up the molar masses of each element.

Molar mass of C:  12.011 g/mol
The equation says C20, which means there are 20 carbon atoms in each molecule of Vitamin A.  So, we multiply 12.011 by 20 to get 240.22 g/mol carbon.

Molar mass of H:  1.0079 g/mol
The equation says C30, which means there are 30 hydrogen atoms in each molecule of Vitamin A. So, we multiply 1.0079 by 30 to get 30.237 g/mol hydrogen.

Molar mass of O: 15.999 g/mol
The equation says O without a number, which means there is only one oxygen atom in each molecule of Vitamin A.  So, we leave O at 15.999 g/mol.

Then, just add it up:
240.22 g/mol C + 30.237 g/mol H + 15.999 g/mol O = 286.456 g/mol C20H30O

So, the molar mass of Vitamin A, C20H30O, is approximately 286.5 g/mol.

URGENT PLEASEEEE HELPA functional group is a specific arrangement of atoms in an organic compound that is capable of characteristic reactions

Is this true of false
PLEASE HELPP NO LINKSS

Answers

Answer:

That is true

Explanation:

:D

What is the difference between periods and groups on the periodic table?

Answers

Periods are rows horizontally along the periodic table whereas groups are vertical columns down the periodic table.
Elements in the same group react similarly. E.g. the group 1 metals (found in the first column of the periodic table) react readily with air and water (this is the similarity) but these reactions become more vigorous / explosive as you go down the group (this is why they are similar but not the same). This is because elements in the same group have the same number of electrons in their outermost energy level (and electrons are responsible for how an element reacts)
Elements in the same period of the periodic table have the same number of inner most (also known as 'main') energy levels so have the same amount of electron shielding.

Which set of numbers gives the correct possible values of l for n = 2? 0 0, 1 0, 1, 2 0, 1, 2, 3

Answers

The answer is 0 and 1

This is because for a given principal quantum number, n, the corresponding set of angular quantum numbers, l, is equivalent to a range between 0 and (n-1). For n=2, (n-1) is equal to 1, so the range is 0 and 1. The magnetic quantum number, m, can be determined by a range from -l to +l. So for this example, m = -1, 0, 1.

Answer:

b

Explanation:

on edge

2. how are firefighters expected to deal with them

Answers

Expected to deal with what? Fires?

What type of reaction is
CH 4 (g)+2O 2 (g) CO 2 (g)+2H 2 O(g)

Answers

Answer: combustion

Explanation:

Combustion reactions can be identified by looking at the reactants and the products.

Usually, the reactants will be a hydrocarbon and oxygen. And the products will be CO2 and H2O
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