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UNO [17]
3 years ago
11

The rock record indicates that photosynthesis began on Earth about 3.5 million years ago.

Chemistry
2 answers:
Oksana_A [137]3 years ago
8 0

I put true into the answer and it was wrong so it is actually FALSE.

<u>The answer above is incorrect.</u>

riadik2000 [5.3K]3 years ago
7 0

Answer;

The above statement is false

Explanation;

Photosynthesis is the biological conversion of light or electromagnetic energy from the Sun into chemical energy. It occurs in green plants, algae, and some types of bacteria, and requires a series of biochemical reactions.

In photosynthesis, carbon dioxide and water react with one another in the presence of light and a chemical known as chlorophyll to produce a simple carbohydrate and oxygen.

Fossils of what are thought to be filamentous photosynthetic organisms have been dated at 3.4 billion years old. Geological evidence suggests that oxygenic photosynthesis, such as that in cyanobacteria, became important during the Paleoproterozoic era around 2 billion years ago.

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How many molecules of Carbon<br> Dioxide (CO2) are there in 2 CO2?
Dima020 [189]

There are 2 molecules of Carbon dioxide(CO2)

<h3>Further explanation</h3>

Given

Molecules of CO2

Required

The number of molecules

Solution

The coefficient of a molecule shows the number of that molecule, while the subscript after the name of the atom indicates the number of that atom in the molecule

Because there is a coefficient of 2 in front of the CO2 molecule, then the number of CO2 molecules is 2

5 0
2 years ago
What climate is Colorado in?
maks197457 [2]

Answer:

b

Explanation:

4 0
2 years ago
Read 2 more answers
What are the different redox states of nitrogen in the ocean and what are example chemical species? Please give at least three.
enot [183]

Nitrogen exists in the ocean in three redox states:

  1. In + 3 state as ammonium ion, NH4+
  2. In the 0 state as nitrogen gas
  3. In the +5 state as trioxonitrate (v) ion, NO3-

<h3>What are redox states?</h3>

The redox state of an element is the charge it appears to have in the free or combined state.

Nitrogen exists in the ocean in three redox states:

  1. In + 3 state as ammonium ion, NH4+
  2. In the 0 state as nitrogen gas
  3. In the +5 state as trioxonitrate (v) ion, NO3-

Therefore, the redox state of nitrogen varies in the ocean.

Learn more about redox state at: brainly.com/question/26263317

3 0
2 years ago
Calculate the average atomic mass for the following elements.
nikklg [1K]

Explanation:

All boron isotopes have 5 protons.

B11 has 6 neutrons, so its atomic mass is:

6 (1.008664 u) + 5 (1.007276 u) = 11.0884 u

B10 has 5 neutrons, so its atomic mass is:

5 (1.008664 u) + 5 (1.007276 u) = 10.0797 u

So the average atomic mass of boron is:

0.80 (11.0884 u) + 0.20 (10.0797 u) = 10.8866 u

The closest whole number is 11.

8 0
3 years ago
What is the reason for heat transfer from one substance to another? A. difference in pressure B. difference in volume C. differe
gulaghasi [49]

Answer

C. Difference in temperature

Explanation

According to thermodynamics, heat transfer occurs when heat from a high temperature reservoir moves to a low temperature reservoir. For heat to be transferred, the two objects should have different temperatures with one having more temperature than the other. Heat transfer in solids is by conduction, in fluids is by convection and by radiation.

4 0
3 years ago
Read 2 more answers
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