How many grams of lithium nitrate will be needed to make 250.0 grams of lithium sulfate?

Answers

Answer 1

Answer: the answer would be 313 g

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Which of the following indicates a Web site's country of origin is Canada? A. .uk B. .ka C. .us D. .ca Which of the following best describes spam? A. A program that's not compatible with your browser B. A program that will give your computer extra power C. Electronic junk mail D. Computer viruses
What is atomic mass measured in on the periodic table?

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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Which environmental changes occur faster?A.volcanic eruption

B.regrowth of forest after volcanic eruption

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The environmental change that occurs faster is definitely volcanic eruption. It may happen in an instant and destroy everything in its way, whereas the process of regrowth of forest after volcanic eruption is a slow one.

Quartz, which contains one silicon atom and two oxygen atoms per formula unit, is the second-most-common mineral on Earth after feldspar. It is used as a gemstone, as well as in pressure gauges, oscillators, resonators, wave stabilizers, heat-ray lamps, and prismastic lenses, and in the manufacture of glass, paints, abrasives, and precision instruments such as watches. What is the chemical formula for quartz?

Answers

The chemical formula for quartz is SiO_2

The chemical formula for quartz is SiO_2, which represents one silicon atom and two oxygen atoms in each formula unit.

Quartz is composed of silicon (Si) and oxygen (O) atoms bonded together in a specific arrangement. Its chemical formula, SiO2, represents this composition.

In quartz, each silicon atom is bonded to two oxygen atoms, and each oxygen atom is bonded to one silicon atom. This arrangement forms a three-dimensional network structure, making quartz a crystalline mineral.

The chemical formula SiO_2 provides a precise representation of the elements and their ratios in quartz.

Silicon and oxygen are the two elements that make up the mineral, and they are combined in a 1:2 ratio, meaning that for every silicon atom, there are two oxygen atoms.

This ratio is essential for understanding the stoichiometry and structure of quartz.

Quartz has various applications due to its unique properties, such as its hardness, transparency, and ability to transmit certain wavelengths of light, making it valuable in electronics, optics, and various industrial processes.

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I've been waiting for like 10 mins. Please answer this.Which of these equations describes photosynthesis?

A.
6CO2 + C6H12O6 --> 6H2O + 6O2

B.
6CO2 + 6H2O --> C6H12O6 + 6O2

C.
C6H12O6 + 6O2 --> 6CO2 + 6H2O

D.
6CO2 + 6O2 --> C6H12O6 + 6H2O

Answers

The answer is B. 6CO2+H2O yields C6H12O6+ 6H20.

Which of the following species has the greatestnumber of electrons?
1. Cl1−
2. Co4+
3. Fe2+
4. V
5. Sc2−

Answers

Answer: Option (3) is the correct answer.

Explanation:

When there is a negative charge on an atom then we add the charge with the number of electrons. Whereas when there is a positive charge on an atom then we subtract the charge from the number of electrons.

Atomic number of chlorine is 17. So, number of electrons present in $Cl^(-)$ is 17 + 1 = 18 electrons.

Atomic number of cobalt is 27. So, number of electrons present in $Co^(4+)$ is 27 - 4 = 23 electrons.

Atomic number of iron is 26. So, number of electrons present in $Fe^(2+)$ is 26 - 2 = 24 electrons.

Atomic number of vanadium is 23. So, number of electrons present in V is 23 electrons.

Atomic number of scandium is 21. So, number of electrons present in $Sc^(2-)$ is 21 + 2 = 23 electrons.

Thus, we can conclude that out of the given species, $Fe^(2+)$ has the greatest number of electrons.

Among the given species, $\boxed{3.{\text{ F}}{{\text{e}}^(2 + )}}$ has the greatest number of electrons.

Further Explanation:

The arrangement of electrons in various shells and sub-shells of an atom is called electronic distribution. The electron filling is done by keeping following rules and principles in mind:

(i). Aufbau principle

According to this, electron filling takes place in orbitals in the increasing order of their respective energies. The energy order of orbitals is as follows:

$1s < 2s < 2p < 3s < 3p < 4s < 3d < 4p < 5s < 4d < 5p < 6s < 4f < 5d < 6p < 7s < 5f < 6d < 7p$

(ii) Hund’s rule

No electron will b epaired until each orbital is singly occupied.

(iii) Pauli’s exclusion principle

It states that two electrons can never have all the four quantum numbers same. The value of spin quantum number for both electrons must b edifferent.

1. According to the periodic table, the atomic number of Cl is 17 so its electronic configuration is $1{s^2}2{s^2}2{p^6}3{s^2}3{p^6}3{d^7}4{s^2}$ . It gains an electron to form ${\text{C}}{{\text{o}}^(4 + )}$ ion and its configuration becomes $1{s^2}2{s^2}2{p^6}3{s^2}3{p^6}3{d^5}$ . So it has a total of 18 electrons.

2. According to the periodic table, the atomic number of Co is 27 so its electronic configuration is $1{s^2}2{s^2}2{p^6}3{s^2}3{p^6}3{d^7}4{s^2}$ . It loses four electrons, two 4s electrons and two 3d electrons to form ion and its configuration becomes $1{s^2}2{s^2}2{p^6}3{s^2}3{p^6}3{d^5}$ . So it has a total of 23 electrons.

3. According to the periodic table, the atomic number of Fe is 26 so its electronic configuration is $1{s^2}2{s^2}2{p^6}3{s^2}3{p^6}3{d^6}4{s^2}$ . It loses two 4s electrons to form ${\text{F}}{{\text{e}}^(2 + )}$ ion and its configuration becomes $1{s^2}2{s^2}2{p^6}3{s^2}3{p^6}3{d^6}$ . So it has a total of 24 electrons.

4. According to the periodic table, the atomic number of V is 23 so its electronic configuration is $1{s^2}2{s^2}2{p^6}3{s^2}3{p^6}3{d^3}4{s^2}$ . So it has a total of 23 electrons.

5. According to the periodic table, the atomic number of Sc is 21 so its electronic configuration is $1{s^2}2{s^2}2{p^6}3{s^2}3{p^6}3{d^1}4{s^2}$ . It gains two electrons to form ${\text{S}}{{\text{c}}^(2 - )}$ ion and its configuration becomes $1{s^2}2{s^2}2{p^6}3{s^2}3{p^6}3{d^3}4{s^2}$ . So it has a total of 23 electrons.

Therefore, the maximum number of electrons is present in ${\text{F}}{{\text{e}}^(2 + )}$ (24).

Learn more:

Determine the ion with configuration : brainly.com/question/7599542
Identification of element which has electron configuration :brainly.com/question/9616334

Answer details:

Grade: High School

Chapter: Electronic configuration of the elements

Subject: Chemistry

Keywords: electrons, Cl-, Co4+, Fe2+, V, Sc2-, 17, 27, 26, 21, 23, electronic configuration.

How many total atoms are in 0.450 grams of P2O5

Answers

Final answer:

To find the number of atoms in 0.450 grams of P2O5, you need to calculate the number of moles of P2O5 and then use Avogadro's number to convert it to the number of atoms.

Explanation:

To determine the number of atoms in 0.450 grams of P2O5, we need to use the molar mass of P2O5. The molar mass of P2O5 is 141.94 g/mol. Using this information, we can calculate the number of moles of P2O5 in 0.450 grams by dividing the mass by the molar mass:

Moles of P2O5 = mass / molar mass = 0.450 g / 141.94 g/mol = 0.00317 mol

Next, we can use Avogadro's number to convert the moles of P2O5 into the number of atoms:

Number of atoms = moles x Avogadro's number = 0.00317 mol x 6.022 x 1023 atoms/mol = 1.91 x 1021 atoms

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Which two characteristics are associated with metals?(1) low first ionization energy and low electronegativity(2) low first ionization energy and high electronegativity(3) high first ionization energy and low electronegativity(4) high first ionization energy and high electronegativity

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Determine the pH of 0.450 M HC7H5O2. The Ka for HC7H5O2 is 6.5 × 10⁻⁵.

The decomposition of ammonium hydrogen sulfideNH4HS (s) <=> NH3 (g) + H2S (g)is an endothermic process. A 6.1589-g sample of the solid is placed in an evacuated 4.000-L vessel at exactly 24°C. After equilibrium has been established, the total pressure inside is 0.709 atm. Some solid NH4HS remains in the vessel.(a) What is the KP for the reaction?(b) What percentage of the solid has decomposed?(c) If the volume of the vessel were doubled at constant temperature, what would happen to the amount of solid in the vessel?