All categories

3 years ago

Why do you think learning about how atomic theory has evolved is important?

1 answer:

7 0

I feel like it is important, because it is always nice to learn about new things and keep your mind open, to expand your knowledge.

I hope this helps ^-^

You might be interested in

Assuming that the bath contains 250.0 g of water and that the calorimeter itself absorbs a negligible amount of heat, calculate

Anvisha [2.4K]

Answer:

$-3272$ kJ/mol

Explanation:

Given and known facts

Mass of Benzene $= 0.187$ grams

Mass of water $= 250$ grams

Standard heat capacity of water $= 4.18$ J/g∙°C

Change in temperature ΔT $= 7.48$ °C

Heat

$=250 * 4.18 * 7.48\\=7816.6 \\=7.82$

Heat released by benzine is - 7.82 kJ

Now, we know that

$0.187$ grams of benzene release $= -7.82$ kJ heat

So, $1$ g benzine releases

$\frac{ -7.82 }{0.187}\\= -41.8$

kJ/g

$0.187 * \frac{1}{78.108}=0.00239$ mol C6H6

Heat released

$= \frac{-7.82}{ 0.00239}$

$=-3272$ kJ/mol

4 0

3 years ago

What is the name of IBr4?<br> And is it covalent or ionic?

BlackZzzverrR [31]

Answer: The name of the $IBr_4$ is Iodine tetrabromide and it is a covalent compound.

Explanation:

Inter-halogen compounds are compounds which composed of two different halogen atoms. For example ; $ICl_3,IF_5$ etc.

The naming is done by first writing the central atom symbol's name followed by the prefix corresponding to the number of atoms of another halogen atom like: Mono for 1, di ,for 2 tri for 3, tetra for 4 , penta for 5 etc. After this name of the another halogen is written with suffix 'ide' in the end.

The name of the $IBr_4$ is Iodine tetra bromide.

In halogen compounds, the difference in electronegativities is not so large due to which they form covalent compounds by the means of sharing the electrons. Hence the Iodine tetrabromide covalent compound.

8 0

3 years ago

In which group do all atoms have seven valence electrons in the ground state?

SpyIntel [72]

Hence they got seven electrons in ground state

8 0

3 years ago

Tincture of iodine has antiseptic properties. This solution is made by dissolving.

ser-zykov [4K]

Tincture of iodine has antiseptic properties and is made by dissolving iodine crystals in alcohol.

<h3>What are antiseptics?</h3>

Antiseptics are substance which prevent or stops the growth of microorganisms.

Microorganisms have been known to cause diseases, therefore the application of antiseptics are useful to prevent diseases.

An example of an antiseptic is tincture of iodine.

Tincture of iodine is prepared by dissolving iodine crystals in alcohol.

In conclusion, antiseptics are useful in the prevention of diseases by microorganism. An example of an antiseptic is tincture of iodine.

Learn more about tincture of iodine at: brainly.com/question/3209701

#SPJ1

7 0

2 years ago

If you stacked Avogadro's number of pennies one on top of the other on Earth's surface, how far would the stack extend (in kilom

Mashutka [201]

A penny is described as a coin having thickness of about 0.019 m as follows:

$Thickness of a penny = 0.019 m$

$Number of pennies stacked is equivalent to Avogadro number = 6.02 * 10^23 penny$

$Distance convered by number of pennies = 6.02 * 10^23 * 0.019 = 1.14 * 10^19 Km$

$Thus the stack of pennies extended upto 1.14 * 10^19 Km$

5 0

4 years ago