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kipiarov [429]
3 years ago
15

A small, hard-shelled fossil that resembles a modern-day ocean organism was found

Chemistry
1 answer:
Paul [167]3 years ago
5 0

Answer:

The desert was one covered by ocean water.

Explanation:

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Which choice best explains how global winds are formed?
stiv31 [10]

Answer:

what are the choices?

Explanation:

4 0
3 years ago
What is the main source of energy for the water cycle.
viktelen [127]

Answer:

The main source of energy is the sun. The sun has a big part in the water cycle because it turns the water into water vapor. This cause the water cycle to start over again once it rains. Therefore, making the sun ne of the biggest parts in the water cycle.

7 0
2 years ago
An electron transport chain pumps __________ across a membrane while transferring __________ from one chemical to another. View
timama [110]

Answer:

The correct option is: protons; electrons

Explanation:

The electron transport chain contains a series of biomolecules that are involved in the transfer of electrons by redox reactions.

This process involves the transfer of electrons from an <u>electron donor molecule to an electron acceptor molecule</u>, resulting in the <u>release of energy.</u> Some amount of this energy is then used in <u>pumping the protons across the biological membrane.</u>

5 0
3 years ago
Which of the following substances is a chemical that is made only by<br> chemists?
Rainbow [258]

Answer:

theres nothing there

Explanation:

6 0
3 years ago
Determine the volume in ml of a sample of water at 21 c that has a mass of 23.2243 grams
matrenka [14]
Considering that the water is at atmospheric pressure, its density at 21°C is still about 0.99 g/mL. The volume of the water is calculated by dividing the given mass by the density. That is,

    Volume = mass / density

Substituting the known values to the equation,

   volume = 23.2243 grams/ 0.99 g/mL

Simplifying,
  volume = 23.46 mL

<em>Answer: 23.46 mL</em>
5 0
3 years ago
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