How many grams are in 11.9 moles of chromium

Answers

Answer 1

Answer:

The mass of 11.9 moles of chromium (Cr) is equal to 618.8 g.

What is a mole?

A mole is a standard unit that is utilized to calculate a given count of particles. The particles counted are usually chemically identical entities, individually distinct.

A mole is used to calculate a huge number of quantities of atoms, molecules, ions, or other particular particles. The quantity amount of substance can be described as a measure of elementary entities of a given substance in a sample.

The number of units present in one mole is equal to 6.023 × 10 ²³ which is known as Avogadro’s constant.

Given, the number of moles of chromium = 11.9 moles

The mass of one mole of chromium = 52 g

Then, the mass of 11.9 moles of chromium = 11.9 × 52

The mass of 11.9 moles of chromium (Cr) = 618.8 g

Therefore, 618.8 grams is the mass of 11.9 moles of chromium (Cr).

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Answer 2

Answer: 618.75 Would be your answer! Would you like me to explain a bit further for you?
~Korey :)

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Which of these elements has physical and chemical properties most similar to silicon (Si)?(1) germanium (Ge) (3) phosphorus (P) (2) lead (Pb) (4) chlorine (Cl)

The modern atomic model is also sometimes called the __________ model.a. solar system
b. Bohr
c. plum pudding
d. quantum mechanics

Answers

The correct answer is B. The modern atomic model is also sometimes called the Bohr model. This model was introduced by Niels Bohr in 1913. According to this model, an atom is a small, positively charged nucleus which is surrounded by negatively charged particles called electrons.

The answer is B. Bohr

The greatest amount of energy released per gram of reactants occurs during a(1) redox reaction(2) fission reaction
(3) substitution reaction
(4) neutralization reaction

Answers

Answer : The correct option is, (2) Fission reaction.

Explanation :

Fission reaction : This is a type of nuclear reaction in which the splitting of bigger nuclei into two smaller nuclei takes place. During this process, the large amount of energy is released.

Redox reaction : This is an oxidation-reduction reaction in which the electrons transferred between the two molecules.

Substitution reaction : In this reaction, one functional group is replaced by the another functional group in a chemical compound.

Neutralization reaction : In this reaction, the acid and base react to give water and a salt.

Redox reaction, substitution reaction and neutralization reaction are the chemical reactions in which the heat releases when the chemical bonds are breaking and forming.

Therefore, the greatest amount of energy released per gram of reactants occurs during the fission reaction.

The answer is (2) fission reaction. The other three are chemical reaction, so they change the chemical energy to heat to release when chemical bonds breaking and forming . But for fission reaction, the nucleus have been changed. So the mass change to energy to release.

Which pair of atoms can form an ionic bond?* Na, K (Sodium, Potassium)
* K, F (Potassium, Fluorine)
* F, Cl (Fluorine, Chlorine)
* Na, Ne (Sodium, Neon)

Answers

Answer: K, F (Potassium, Fluorine)

Explanation: Ionic bonds are formed by transfer of electrons between metal and non metals.

Covalent bonds are formed by sharing of electrons between non metals.

Electronic configuration of potassium:

$[K]:19:1s^22s^22p^63s^23p^64s^1$

Potassium atom will lose one electron to gain noble gas configuration and form $K^+$ .

$[K^(+)]:18:1s^22s^22p^63s^23p^6$

Electronic configuration of fluorine:

$[F]:9:1s^22s^22p^5$

Fluorine atom will gain one electron to gain noble gas configuration and form $F^-$ .

$[F^-]:10:1s^22s^22p^6$

In potassium fluoride the one electron from potassium metal gets transferred to fluorine atom and thus form an ionic bond to give $KF$

The pair of atoms that can form an ionic bond is $\rm K\ , F$ (Potassium, Fluorine).

An atom is the basic unit of matter that consists of a nucleus, which contains positively charged protons and uncharged neutrons, surrounded by a cloud of negatively charged electrons.

In the given pair of atoms potassium and fluorine can form ionic bonds. This is because potassium has one valence electron, which it can easily lose to form a positively charged ion, while fluorine has seven valence electrons and needs one more electron to complete its outer shell. Therefore, it has a strong tendency to gain one electron to form a negatively charged ion.

When potassium and fluorine combine, the potassium atom loses one electron to become a positively charged ion, while the fluorine atom gains one electron to become a negatively charged ion.

The resulting oppositely charged ions are attracted to each other, forming an ionic bond.

In conclusion, $\rm K$ (potassium) and $\rm F$ (fluorine) are the atoms can form ionic bonds.

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What is the maximum number of covalent bonds a carbon atom can form with other atoms?A. 1
B. 2
C. 4
D. 6

Answers

(C.) Each carbon atom in ethane forms 4

There is no such thing called a 'hexa-bond', as there is a quad-bond and a triple bond and so on...

A carbon atom cannot form a 6 covalent bond with another atom, the max is 4.

Answer: 4

Look at this picture of a whale shark.Which question about whale sharks is nonscientific?

A) What do whale sharks eat?

B) How big is the average whale shark’s mouth?

C) Does a whale shark like having a large mouth?

D)What happens to the water that enters a whale shark’s mouth?

Chemistry Honors College level

10th grader

Answers

Answer:

The nonscientific question about whale sharks is

C) Does a whale shark like having a large mouth?

This question asks for the subjective preference of a whale shark, which cannot be determined scientifically since we cannot directly communicate with the animal. Scientific questions are typically based on observable facts and measurable data.

Explanation:

Have a good day <3

Which of the following best describes what happens when molecular compounds melt? A.) Molecules separate into their component atoms. B.)Molecules move more slowly. C.) Molecules arranged in an irregular pattern change to a regular pattern. D.) Molecules arranged in a regular pattern change to an irregular patter.

Answers

I think the correct answer from the choices listed above is option D. When a molecular compound melts, they undergo the process of phase change from solid to liquid therefore molecules arranged in a regular pattern change to an irregular pattern. Hope this answers the question.

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