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3 years ago

Where does nearly all life get its energy from? * Oxygen A.Sun B.Produce C.Soil

Chemistry

2 answers:

tekilochka [14]3 years ago

6 0

Sun because not all things use the others. The only creatures not using sun in a way are fish in deep waters

meriva3 years ago

5 0

The sun hope this helps

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Which of the following gives the definition of ion-dipole attraction? Select the correct answer below: O a. lon-dipole attractio

frez [133]

Answer:

Explanation:

Anions are attracted to the positive end of a dipole, while the cations are attracted to the negative end. As the size of the dipole moment or the ionic charge increases, the vastness of the attraction also increases. This type of attraction is important for solutions of ionic substances in polar liquids.

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4 years ago

Which of the following statements is true?

Ivan

Answer:

Explanation:

Most metals can be drawn into a wire while nonmetals would break apart.

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4 years ago

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How many atoms of Hydrogen are in 67.2 L of H2 at STP?

nekit [7.7K]

Answer:

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3 years ago

Deduce the total rate change of momentum of a cylinderical shaped object

Ugo [173]

Rotational versus translational kinetic energy; Total kinetic energy; Acceleration of a rolling object. Example scenarios. Rolling cylinders.

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3 years ago

A certain radioactive isotope has a half-life of 5 days. If one is to make a table showing the half-life decay of a sample of th

Pepsi [2]

It will take 25 days for this substance to become 1gram from 32 grams.

<h3><u>Explanation</u>:</h3>

Radioactivity or radioactive decay is the process of formation of different element from one Radioactive element due to decay of the radioactive nucleus. The radioactive decay is a first order kinetic reaction. This reaction has a straight log C vs T graph.

Here in this particular reaction, the half life of the radioactive substance is 5 days. So within 5 days, the concentration of the substance becomes halved.

Now, in the sample the amount of substance present = 32 grams

The final amount of this sample = 1 grams.

So number of half lives needed for this decay = 5 half lives.

So number of days required for this decay = $5\times5$ =25.

So within 25 days, 32 grams of the substance becomes 1grams.

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4 years ago