CHEMISTRY HIGH SCHOOL

Light energy used for photosynthesis is absorbed by ____ found in plant cells.mitochondria
cytoplasm
chlorophyll
nuclei

Answers

Answer 1
Answer: Light energy used for photosynthesis is absorbed by chlorophyll found in plant cells. Chlorophyll, the green substance found in a plant's chloroplasts, is what gives the plant its pigmentation. It is also the one that absorbs light energy in order for photosynthesis to proceed. Light energy converts CO2 and water into glucose, the food used by plants.

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I found a type of rock in the woods it's kinda rough black with some purple like a lavender purple and i can break it into pieces what could it be?

Answers

It could be a lump of coal.
Since you can break pieces off, maybe charcoal ... the real thing, not a "briquet".
Do your hands get all black when you handle it ?

Balance the following equation. Then determine the mole ratio of Ca(OH)2:Al(OH)3. Al2(SO4)3 + Ca(OH)2 Al(OH)3 + CaSO4

Answers

To balance the reaction, we look at the number of atoms of each element we have. It should be equal for both sides. The balanced reaction is:

Al2(SO4)3 + 3Ca(OH)2 =  2Al(OH)3 + 3CaSO4

The ratio of calcium hydroxide and aluminum hydroxide is 3:2.

Answer: The mole ratio of Ca(OH)_2:Al(OH)_3 is 3 : 2

Explanation:

Law of conservation of mass states that mass can neither be created nor be destroyed, but it can only be transformed from one form to another. In a chemical reaction, total number of individual atoms on reactant side must be equal to the total number of individual atoms on the product side.

All the balanced chemical equation follows law of conservation of mass.

The balanced chemical equation for the combination of aluminium sulfate with calcium hydroxide is:

Al_2(SO_4)_3+3Ca(OH)_2\rightarrow 2Al(OH)_3+3CaSO_4

Mole ratio of any two compounds is basically the ratio of their stoichiometric coefficients.

Hence, the mole ratio of Ca(OH)_2:Al(OH)_3 is 3 : 2

What is the mass of 0.7891 mol of (fe2o3)?

Answers

Molar mass F₂O₃ = 159.69 g/mol

1 mole ------------------ 159.69 g
0.7891 moles ---------- ? g

mass = 0.7891 x 159.69 / 1

= 126.01 g 

hope this helps!

What is the molarity (M) of a solution that contains .25 moles of a compound in 1.8 L of solution?

Answers

Answer:

The answer to your question is 0.14 M

Explanation:

Data

Molarity = ?

number of moles = 0.25

volume = 1.8 L

Formula

Molarity = (number of moles)/(volume)

Substitution

Molarity = (0.25)/(1.8)

Simplification and result

      Molarity = 0.14 M

Rank the following structures in order of decreasing electrophilic strength.

Answers

Electrophiles are positively charged or neutral species having empty orbitals that are attracted to an electron rich center. Examples of these are the Bronsted acid. Bronsted acid accepts an electron pair for hydrogen.

What is the difference between a homogeneous and a haterogeneous mixture

Answers

a homogeneous mixture has the same uniform appreance, and composition throughout. heterogeneous mixture consists of visibly different substances or phases, that would be your answer to that question.
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Pls help its due in a few minutes