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4 years ago

Which characteristics do photosynthesis and cellular respiration have common

1 answer:

3 0

Cellular respiration is performed by the mitochondira; it turns glucose or food to energy that the cell can use. Photosynthesis is performed by chloroplast and is only found in plant cells; it turns the sun's energy to glucose which can be turned into energy for the plant.

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What is the the top of the wave called

Len [333]

The top of a wave is called the wave crest.

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3 years ago

Which molecular solid would have the highest melting point?

TEA [102]

Answer:

Choice B. The solid with hydrogen bonding.

Assumption: the molecules in the four choices are of similar sizes.

Explanation:

Molecules in a molecular solid are held intact with intermolecular forces. To melt the solid, it is necessary to overcome these forces. The stronger the intermolecular forces, the more energy will be required to overcome these attractions and melt the solid. That corresponds to a high melting point.

For molecules of similar sizes,

The strength of hydrogen bonding will be stronger than the strength of dipole-dipole attractions.
The strength of dipole-dipole attractions (also known as permanent dipole) will be stronger than the strength of the induced dipole attractions (also known as London Dispersion Forces.)

That is:

Strength of Hydrogen bond > Strength of Dipole-dipole attractions > Strength of Induced dipole attractions.

Accordingly,

Melting point due to Hydrogen bond > Melting point due to Dipole-dipole attractions > Melting point due to Induced Dipole attractions.

Induced dipole is possible between all molecules.
Dipole-dipole force is possible only between polar molecules.
Hydrogen bonds are possible only in molecules that contain $\rm H$ atoms that are bonded directly to atoms of $\rm F$ , $\rm O$ , or $\rm N$ .

As a result, induced dipoles are the only force possible between molecules of the solid in choice C. Assume that the molecules are of similar sizes, such that the strengths of induced dipole are similar for these molecules.

Melting point in choice B > Melting point in choice D > Melting point in choice A and C.

8 0

3 years ago

I JUST NEED HELP!!!!

lord [1]

Answer:

D ( I am probably wrong)

Explanation:

8 0

3 years ago

The accepted value for the density of iron is 7.9 g/mL. Four student groups examine the density of iron in the lab. Which of the

nalin [4]

For 5.43 g/mL and 5.44 g/mL = 0.01 the least diff and most precise.

First of all, precision is determined by the difference in the two obtained values. If the difference between the two values obtained is less, then precision is more. If the difference between the two values obtained is more, then precision is less.

For 5.43 g/mL and 5.44 g/mL , we can see that the difference between these two data is 0.01

For 7.98 g/mL and 7.91 g/mL , we can see that the difference between these two data is 0.07

For 7.65 g/mL and 7.64 g/mL , we can see that the difference between these two data is 0.01

For 7.06 g/mL and 7.03 g/mL , we can see that the difference between these two data is 0.03

As we can see that, the most difference between the data is 0.07 between 7.65 g/mL and 7.64 g/mL and thus, they are least precise.

To know more about precision visit :

brainly.com/question/28336863

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3 0

2 years ago

What characterizes a radioactive atom?

elena-s [515]

Answer:

It's C

Protons repel the neutrons.

Explanation:

An atom is unstable (radioactive) if these forces are unbalanced; if the nucleus has an excess of internal energy. The instability of an atom's nucleus may result from an excess of either neutrons or protons.

6 0

3 years ago

Read 2 more answers