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2 years ago

1. How is different kind of molecules different? And similar?

Chemistry

2 answers:

Dafna1 [17]2 years ago

6 0

I agree with the person above me lol

dexar [7]2 years ago

5 0

Answer:

1.Molecules are made of atoms. So different molecules can have different (or same) number of atoms they are made of.Different atoms are made of different number of protons of neutrons in the nucleus (also electrons around the nucleus but they are very small even compared to atom and don’t add up for volume or mass) therefore their radius and mass are different.

2.Chromatography works because of differences in the properties of molecules in materials.some molecules differ in shape and size. These differences in molecular properties allow scientists to separate compounds into individual molecules using chromatography.

Explanation:

hope this helps

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Mr. Avogadro has 20 grams of radioactive Pa-234. How many atoms of Pa-234 does Mr. Avogadro have? PLEASE HELP WILL MARK BRAINLIE

jolli1 [7]

Answer:

The number of atoms in 20 grams of Pa-234 is 5.14 ×10²² atoms

Explanation:

Given that the molar mass of Pa-234 (protactinium) is 234.04331, we have

The number of moles of protactinium in 20 grams of Pa-234, we have

Number of moles = Mass/(Molar mass) = 20/234.04331 = 0.0855 moles

One mole of Pa-234 contains 6.02×10²³ atoms, therefore, we have;

0.0855 moles of Pa-234 contains 0.0855× 6.02×10²³ = 5.14 ×10²² atoms

Therefore, the number of atoms in 20 grams of Pa-234 = 5.14 ×10²² atoms.

6 0

3 years ago

Read 2 more answers

Check the statement(s) that is(are) true. Check All That Apply An excited atom can return to its ground state by absorbing elect

Natalija [7]

Answer:

The energy of electromagnetic radiation increases as its frequency increases.

The frequency and wavelength of electromagnetic radiation are inversely proportional.

Explanation:

According to Max Plank's equation, the energy of electromagnetic radiation is given by E=hf where h= Plank's constant and f= frequency of the electromagnetic radiation. This means that the energy and frequency of electromagnetic radiation and its energy are related by a direct proportion. As frequency of the electromagnetic radiation increases, the energy of the radiation increases also.

However, frequency and wavelength of electromagnetic radiation are inversely related. The frequency decreases with increasing wavelength of electromagnetic radiation.

5 0

3 years ago

The distance time graph for four objects is shown below:

solmaris [256]

Answer:

Option A

Explanation:

Remember constant means staying the same so in order to remain constant on the graph the line has to keep going up remaining the same pace. Which means the answer is option A or "Object A." The graph consists of a line going up at a constant speed without any bends or turns which all the other options consist of.

Hope this helps.

6 0

3 years ago

why can an increase in temperature lead to more effective collisions between reactant particles and an increase in the rate of a

Tasya [4]

The reason why is because particles are moving faster and possess greater kinetic energy due to the increase in temperature, this causes greater frequency or number of collisions to take place and also allows for a higher likelihood that upon reactant molecules colliding they will undergo the reaction process as they will have achieved the required energy needed for the reaction to start. Thus overall having a greater change in quantity conversion of reactants to products within a shorter period of time, thus increasing the reaction rate.

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3 years ago

Though hydrochloric acid is formed inside our body, it is not called organic acid. Why?

Sphinxa [80]

Explanation:

Hydrochloric acid does not consider as organic acid because of the absence of carbon in it.

hope it helps

6 0

2 years ago