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3 years ago

Consider the following events of photosynthesis.

Chemistry

2 answers:

Alekssandra [29.7K]3 years ago

5 0

There are different photo systems involved in the phenomenon of photosynthesis which are units of protein

The two photo-systems are required for aerobic photosynthesis

Photosystem I

Photosystem II

The photosystem II absorbs energy [ thus light energy excites electron]

In photosystem II splits water molecules are split.

The excited electrons are transferred through cytochrome to photosystem I

In photosystem I NaDPH is formed.

thus answer is

1. photosystem II

2. photosystem II

3. photosystem I

Reil [10]3 years ago

4 0

Stage 2 of B I believe.

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When the equation Fe + O2→Fe2O3 is balanced, the coefficient for O2 is:

ollegr [7]

The fully balanced equation would be

4Fe + 3O2 --> 2Fe2O3

for each side, we have

4 Fe (4 iron)
6 Oxygen (O)

So the final answer is choice B) 3

7 0

3 years ago

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maks197457 [2]

Answer:

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6 0

3 years ago

Is manganese an element compound or mixture answers?

Shalnov [3]

Manganese is an element.

Manganese is the 25th element on the periodic table. As it is an element, it means it cannot be separated or broken down into anything simpler, even by chemical methods such a electrolysis.

In additional, compound is where 2 or more elements are chemically bonded together, which usually involves heat, while mixture is where 2 or more elements or Compounds mixed together in any proportions.

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3 years ago

What is the pH of a solution with a hydrogen concentration of 4.3 X 10^-12

oksano4ka [1.4K]

Answer:

pH = 11.37

Explanation:

To find the pH of a solution, we can use the formula:

pH = -log[H+]

Let's plug in what we know.

pH = -log(4.3 x $10^{-12}$ )

Evaluate the log.

pH = 11.37

Hope this helps!

6 0

3 years ago

What’s the answer I don’t know how to do it

Inessa05 [86]

Answer:

3.63m/s²

Explanation:

Given parameters:

Mass of box = 8kg

Net force = 29N

Unknown:

Acceleration of the box = ?

Solution:

To solve this problem, we use Newton's second law of motion which is stated as;

Force = mass x acceleration

Acceleration = $\frac{Force }{mass}$ = $\frac{29}{8}$

Acceleration = 3.63m/s²

5 0

3 years ago