Who placed all the elements in the right place according to their properties

Answers

Answer 1
Answer: Dmitri Mendeleev Was the name of the guy you where looking for

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What are the 6 branches of chemistry and what do they study?

Answers

Hi there!

The 6 branches of chemistry are Organic Chemistry, Inorganic Chemistry, Analytical Chemistry, Physical Chemistry, Biochemistry, and Nuclear Chemistry.

Organic Chemistry: The branch of chemistry dedicated to carbon compounds and substances.

Inorganic Chemistry:  The branch of chemistry dedicated to non-carbon compounds and substances.

Analytical Chemistry: The branch of chemistry dedicated to identifying and quantifying matter through a variety of different instruments, tools, and practices.

Physical Chemistry: The branch of chemistry dedicated to analysis of chemical phenomena as well as their different behavior and phenomena. 

Biochemistry:  The branch of chemistry dedicated to the chemical processes such as cellular respiration that occur within living organisms.

Nuclear chemistry:  The branch of chemistry dedicated to nuclear processes and properties as well radioactivity.
   Organic Chemistry- The study of most carbon containing compounds.
   Inorganic Chemistry- The study of non-organic substances, many of which have organic fragments bonded with metals.
   Physical Chemistry- The study of the properties and changes of matter and their relation to energy.
Analytical Chemistry- The intensification of the components and composition of materials.
Biochemistry- The study of substances and processes occurring in living things. 
Theoretical Chemistry- The use of math and computers to understand the principles being observed and chemical behavior.


What occurs in both fusion and fission reactions?(1) Small amounts of energy are converted into
large amounts of matter.
(2) Small amounts of matter are converted into
large amounts of energy.
(3) Heavy nuclei are split into lighter nuclei.
(4) Light nuclei are combined into heavier nuclei

Answers

Fusion and fission are nuclear reactions that convert a small amount of matter into a large amount of energy.

The fusion reaction is the reaction in which the molecules combine and form energy. The fission reaction is the decomposition nuclear reaction where the matter is degraded into a small entity and the energy is released.

The energy is not converted into matter in both reactions. There is no splitting or combination of nuclei in both reactions.

Thus, the small amount of matter is converted into a large amount of energy is correct.

For more information, refer to the link:

brainly.com/question/4837991

I believe the correct answer from the choices listed above is option 2. Small amounts of matter are converted into
large amounts of energy occurs in 
both fusion and fission reactions. They are nuclear reactions where a change in the identity or characteristics of an atomic nucleus results when it is bombarded with an energetic particle, as in fission, fusion, or radioactive decay.

NaCO3 + 2HCl = 2NaCl + H2O + CO2. Determine the number of moles of HCl that are needed to produce 4.8 moles of CO2?

Answers

NaCO₃ + 2 HCl = 2 NaCl + H₂O + CO₂
 
2 moles HCl ----------> 1 mole CO₂
? moles ----------------> 4.8 moles CO₂

moles = 4.8 * 2 / 1

=  9.6 moles of HCl

hope this helps!

Which law states that the volume of a gas is proportional to the moles of the gas when pressure and temperature are kept constant?

Answers

Answer: Avogadro's Law states that volume is directly proportional to the oles of the gas.

Explanation: Expression fro ideal gas equation:

PV=nRT

This law has arrived from the combination of four laws:

1) Boyle's Law: This law states that pressure is inversely proportional to the volume of the gas at constant temperature and number of moles.

P\propto (1)/(V)     (At constant temperature and number of moles)

2) Charles' Law: This law states that volume is directly proportional to the temperature of the gas at constant pressure and number of moles.

V\propto T    (At constant pressure and number of moles)

3) Gay-Lussac's Law: This law states that pressure is directly proportional to the temperature of the gas at constant volume and number of moles.

P\propto T     (At constant volume and number of moles)

4) Avogadro's Law: This law states that volume is directly proportional to the number of moles of the gas at constant pressure and temperature.

V\propto n   (At constant temperature and pressure)

Hence, the correct answer is Avogadro's Law.

Answer:

d. Avogadro’s law

Explanation:

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A group of students were discussing the lonization energies of Selenium and Flourine. Which student is correct for the reason why their element has the highest lonization energy? O A Student C says F because the larger the atom, the stronger the attraction between protons and valence electrons. The stronger the attraction the more energy is needed to remove a valence electron. B. Student B says Se because the smaller the atom, the stronger the attraction between protons and valence electrons. The stronger the attraction, the more energy is needed to remove a valence electron. C. Student D says F because the smaller the atom, the stronger the attraction between protons and valence electrons. The stronger the attraction, the more energy is needed to remove a valence electron. OD. Student A says Se because the larger the atom, the stronger the attraction between protons and valence electrons. The stronger the attraction the more energy is needed to remove a valence electron.​

Answers

The correct student is Student D, who says that Fluorine (F) has the highest ionization energy because the smaller the atom, the stronger the attraction between protons and valence electrons.

The stronger the attraction, the more energy is needed to remove a valence electron.

Ionization energy refers to the energy required to remove an electron from an atom. Smaller atoms have a stronger attraction between the positively charged protons in the nucleus and the negatively charged electrons in the outermost energy level. As a result, it takes more energy to remove an electron from a smaller atom like fluorine. This is because the electrons are held more tightly due to the stronger attraction.

So, the reasoning provided by Student D correctly explains why Fluorine has the highest ionization energy among Selenium (Se) and Fluorine (F).

Learn more about ionization energy from the link given below.

brainly.com/question/33907239

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I think the Answer is C because Flourine is stronger in electron attraction and is smaller so it has a stronger electronic pull. Hope this helps :)

A student needs .575 moles of sodium chloride for an experiment. how many grams she she mass out

Answers

The molecular weight of NaCl is 58.44 g/mol.
0.575 mol * 58.44 g/mol = 33.6 grams of NaCl