Lithium bromide is a(n) ___________.

A. ionic compound
B. covalent compound
C. empirical fomula
D. molecular formula

The pressure exerted by the neon gas, when the volume is increased from 7.2 mL to 28.8 mL at constant temperature, can be calculated using Boyle's Law. The pressure exerted by the neon gas, when the volume is increased to 28.8 mL at constant temperature, is 0.375 atm.

Boyle's Law states that at constant temperature, the product of the pressure and volume of a gas remains constant. Mathematically, it can be expressed as P₁V₁ = P₂V₂. This law allows us to calculate the change in pressure when the volume changes.

In this case, the initial volume (V₁) is given as 7.2 mL, and the initial pressure (P₁) is 1.5 atm. The final volume (V₂) is 28.8 mL. By substituting these values into Boyle's Law equation, we can solve for the final pressure (P₂).

When we perform the calculations, we find that the pressure exerted by the neon gas, when the volume is increased to 28.8 mL, is 0.375 atm. As the volume increases, the pressure decreases due to the inverse relationship between pressure and volume.

Using Boyle's Law: P₁V₁ = P₂V₂

Given:

Initial volume (V₁) = 7.2 mL

Initial pressure (P₁) = 1.5 atm

Final volume (V₂) = 28.8 mL

To find the final pressure (P₂):

P₂ = (P₁ * V₁) / V₂

  = (1.5 atm * 7.2 mL) / 28.8 mL

  = 0.375 atm

Therefore, the pressure exerted by the neon gas, when the volume is increased to 28.8 mL at constant temperature, is 0.375 atm.

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c i think

Explanation:

if it's not look it up

the splitting of the uranium atom is called nuclear fission.

Fission occurs when a neutron slams into a larger atom, forcing it to excite and split into two smaller atoms also known as fission products. Additional neutrons are also released that can initiate a chain reaction. When each atom splits, a tremendous amount of energy is released.

Nuclear fission is more dangerous than fusion as it produces harmful weapons-grade radioactive waste in the fuel rods that need to be stored safely away for thousands of years.

Fission is the splitting of a heavy, unstable nucleus into two lighter nuclei, and fusion is the process where two light nuclei combine together releasing vast amounts of energy. While different, the two processes have an important role in the past, present and future of energy creation.

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4.2228 g of solid potassium sulfide should be added to make an aqueous solution of 0.180 M potassium sulfide for an experiment in lab, using a 300 ml volumetric flask.

The given molarity of the aqueous solution of potassium sulfide is 0.180 M and the volume of the solution is 300 mL. We are required to find out the amount of solid potassium sulfide required to make the solution.

The formula to calculate the number of moles is: Number of moles = Molarity x Volume (in liters) 1. Convert the volume into liters.300 mL = 0.3 L2. Substitute the given values in the above formula.Number of moles = 0.180 M x 0.3 LNumber of moles = 0.054 mol3. The molecular formula of potassium sulfide is K2S. It means there are two moles of K for one mole of K2S. Hence, we can calculate the moles of K.Number of moles of K = 2 x 0.054

Number of moles of K = 0.108 mol4. The molar mass of K is 39.1 g/mol. Hence, we can calculate the mass of K required to make 0.108 mol.Number of grams of K = Number of moles x Molar massNumber of grams of K = 0.108 mol x 39.1 g/mol

Number of grams of K = 4.2228 g. Hence, 4.2228 g of solid potassium sulfide should be added to make an aqueous solution of 0.180 M potassium sulfide for an experiment in lab, using a 300 ml volumetric flask.

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The molecular mass response of the seas to climate change has recently resulted in a decline inside the width, length, or volume of an Arctic sea ice.

The Arctic often experiences end-of-summer minimum sea ice extents that are getting lower and less. The IPCC points to this shifting sea ice extent as evidence of a warming planet. However, Antarctica's extent of sea ice is expanding.

People may now quickly get information about events occurring in far locations because to the growth of the internet and the number of satellites. Consequently, the world has shrunk in size in modern times.

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Explanation:

unorganized and unsorted i think this is the answer

Among the three companies, Company A has the highest acid-test ratio (2.67), followed by Company B (2.00), and then Company C (1.75). The higher the acid-test ratio, the better the company's ability to meet short-term obligations without relying on inventory sales. Therefore, Company A is in the best position to meet short-term obligations.

To compute the acid-test ratio (also known as the quick ratio) for each company, we'll use the formula:

Acid-Test Ratio = (Current Assets - Inventory) / Current Liabilities

a. Compute the acid-test ratio for each company:

Company A:

Current Assets = $250,000

Inventory = $50,000

Current Liabilities = $75,000

Acid-Test Ratio for Company A = ($250,000 - $50,000) / $75,000

Acid-Test Ratio for Company A = $200,000 / $75,000

Acid-Test Ratio for Company A ≈ 2.67

Company B:

Current Assets = $150,000

Inventory = $30,000

Current Liabilities = $60,000

Acid-Test Ratio for Company B = ($150,000 - $30,000) / $60,000

Acid-Test Ratio for Company B = $120,000 / $60,000

Acid-Test Ratio for Company B = 2.00

Company C:

Current Assets = $300,000

Inventory = $90,000

Current Liabilities = $120,000

Acid-Test Ratio for Company C = ($300,000 - $90,000) / $120,000

Acid-Test Ratio for Company C = $210,000 / $120,000

Acid-Test Ratio for Company C = 1.75

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Answer:

It is the temperature at which a substance changes from a liquid to a solid.

Have a good day!

The temperature at which a substance  changes from a liquid to a solid is called  its freezing point. Hence, option d is the correct definition of freezing point.

Freezing point is a physical property of a substance which measures the temperature at which its liquid state converts to solid state where, the two phases are in equilibrium.

For example, water freezes at 0 degree Celsius to form ice. Hence, 0°C is the freezing point of water. The freezing point of substance is affected by the bond type, molecular weight, temperature and pressure as well the impurities if any.

The more the intermolecular forces between the molecules, more easy to convert it into solid. Hence, the freezing point will be lower. If there is any impurities present, the freezing point depression will occurs.

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Answer

5.50 L of solution

Procedure

We will use dimensional analysis to solve this question. After getting the answer, we will round to 3 significant digits. All the previous can be done in a single-step calculation.

Answer:

formula units

Explanation:

\($KClO_3$\)  is  potassium chlorate. It is an ionic compound containing potassium, chlorine and oxygen. The ion in potassium chlorate are held together by the ionic bonds in the lattice structure.

A representative particle may be defined as the smallest unit for which the substance exists in its natural form. For most of the elements, atom is the representative particle. Molecule is the representative particle for diatoms and molecular compounds. But for ionic compounds such as  \($KClO_3$\) , NaCl, etc. . the representative particle is its formula units.

The concentration of the zinc acetate, Zn(C₂H₃O₂) solution is 1.067 M

Mass of Zn(C₂H₃O₂)₂ = 20.5 g

Molar mass of Zn(C₂H₃O₂)₂ = 65 + 2[(12×2) + (3×1) + (16×2)]

= 65 + 2[59]

= 183 g/mol

Mole = mass / molar mass

Mole of Zn(C₂H₃O₂)₂ = 20.5 / 183

Mole of Zn(C₂H₃O₂)₂ = 0.112 mole

Volume = 105 mL = 105 / 1000 = 0.105 L

Concentration = mole / Volume

Concentration of Zn(C₂H₃O₂)₂ = 0.112 / 0.105

Therefore, the concentration of the zinc acetate, Zn(C₂H₃O₂) solution is 1.067 M

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The period number of krypton is 4

Answer:

The period number for Krypton is 4.

Explanation:

Krypton (Kr), is a chemical element, a rare gas of Group 18 (noble gases) of the periodic table, which forms relatively few chemical compounds.

Answer:

In the process of baking bread, the chemical reaction happens because by consuming the sugar, the yeast has created new substances—carbon dioxide and ethanol.

Explanation:

Brainliest please! I am so close to getting my next ranking! I would really appreciate it, and it would make my day! Thank you so much, and have a wonderful rest of your day!

Answer:

Deciduous forests

Explanation:

Answer:

A thermochemical equation for the combustion of propane (C3H8)(C3H8) is written as follows:

C3H8(l)+5O2(g)→3CO2(g)+4H2O(g);ΔH∘rxnC3H8(l)+5O2(g)→3CO2(g)+4H2O(g);ΔHrxn∘ = -2202.0 kJ/mol

The value given for ΔH∘rxnΔHrxn∘ means that:

a. the reaction of one mole of propane absorbs 2202 kJ of energy from the surroundings.

b. the reaction is endothermic.

c. the enthalpy of formation of propane is 2202 kJ/mol.

d. the reaction of one mole of propane releases 2202 kJ of energy to the surroundings.

e. None of these.

Answer: I said god bless him

Explanation:

NMR spectroscopy or nuclear magnetic resonance spectroscopy is very important in the determination of the organic structures. This technique relies on the interaction of a particular nucleus with a magnetic field followed by the absorption of energy of a specific frequency, depending on the chemical environment of the nucleus.

NMR spectroscopy is the use of NMR phenomena to study the physical, chemical, and biological properties of matter. Chemists use it to determine the identity and structure of molecules. Physicians use magnetic resonance imaging (MRI), a multidimensional NMR imaging technique, for diagnostic purposes.

NMR spectroscopy is an analytical chemistry technique used in quality control to determine the content and purity of organic compounds and the molecular structure of compounds. This technique includes nuclear detection.

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Boiling water on a stove is an example of thermal energy. Thermal energy is produced when the atoms and molecules in a substance vibrate faster due to a rise in temperature.

Since the chloride ion (Cl-) is much larger than the sodium ion and will not fit into the lattice structure of a ccp unit cell, it is not possible to make a ccp (face-centred cubic) unit cell for it.

The formula for sodium chloride is NaCl, where each formula unit contains one sodium ion (Na+) and one chloride ion (Cl-). Chloride ions will occupy the octahedral sites between sodium ions, while sodium ions will fill the face-centered sites of a ccp unit cell.

A face-centred cubic lattice with a base is this configuration, and the base is composed of two ions: a Na+ ion at the face center and a Cl- ion at the base.

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The slope of the solubility curve is dependent on temperature when the solid is dissolved. This is because the solubility of a solid typically increases with temperature, meaning that the curve will have a steeper slope at higher temperatures.

The exact relationship between temperature and slope will depend on the specific solid being dissolved and the nature of its interactions with the solvent. The solubility curve represents the relationship between solubility (amount of solid that can dissolve in a given amount of solvent) and temperature. When the temperature increases, the solubility of most solids in a solvent also increases, resulting in a steeper slope on the solubility curve. The direction of the slope typically goes upward as the temperature increases, indicating that more solid can dissolve at higher temperatures. However, the slope may vary for different substances based on their specific solubility characteristics.

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Answer:

Ions combine into only one ratio

Explanation:

Just took test

Prefixes are not used to indicate the number of atoms when writing the chemical formula. The number of atoms are written as subscripts to their chemical symbols.

Chemical formula of a compound is used to identify a compound and distinguishes it from other compounds. A chemical formula is written from the chemical symbols of elements which constitute the compound.

The number of atoms of each element is written as the subscripts of the symbols for each atoms. For example,magnesium chloride contains one magnesium and two chlorine atoms thus, its formula is MgCl₂.

The subscripts for each atom in the formula of an ionic compound is the charge of the other  atom into which it is bonded. Similarly, the formula of iron oxide containing 2 Fe and 3 O is written as Fe₂O₃.

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First, we need to make the exponent of 10 the same for both.

So let's transform 6.5500 x 10^5 into some number x 10^3.

For this, we need to move the dot to the right, some places where it gives the number 3. In this case, 2 places.

655.00 x 10^3

now we can sum the numbers

8.6500 x 10^3 + 655.00 x 10^3 = 663.65 x 10^3

now we need to transform this number into scientific notation. For this, must have only one number before the dot(on the left side of the dot). We will move the dot to the left, 2 places:

6.6365 x 10^5

Answer: 6.6365 x 10^5

The conversion factors to the conversions that they would be used for as follows:

1.moles/grams ⇒ d. mass to mole

2.grams/moles ⇒ a. mole to mass

3.atoms/grams ⇒ e. mass to atom

4.moles/atoms ⇒ c. atoms to mole

5.atoms/moles ⇒ b. moles to atoms

The term mole is defined as the amount of substance of a system which contains as many elementary entities.

One mole of any substance is equal to 6.023 × 10²³ units of that substance such as atoms, molecules, or ions. The number 6.023 × 10²³ is called as Avogadro's number or Avogadro's constant.

The mole concept can be used to convert between mass and number of particles.

Thus, The conversion factors to the conversions that they would be used for moles/grams ⇒ mass to mole.

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A functional and user-friendly computer system, according to John Gould and Clayton Lewis (1985), should be built with early attention on user duties. They wrote up these three principles when the field of HCl was just getting started.

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Answer:

Silver: 3

Strontium: 1

Technetium: 2

Answer:

1:Silver

2:Strontium

3:Technetium

Hope this helps!! Good Luck!!

Answer:

Static Electricity

Explanation:

Answer:

static electricity

Explanation:

The substance in the image above would be classified as a mixture of elements (option E).

A compound is a substance formed by chemical bonding of two or more elements in definite proportions by weight.

On the other hand, a mixture is made when two or more substances are combined, but they are not combined chemically.

According to this question, an image is shown with two different substances or elements as distinguished by coloration (white and purple). These elements are combined but not chemically bonded, hence, is a mixture.

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Answer:

a

Explanation:

Based on the ion structure, one selenium would form a bond with calcium in a one to one ratio because the combination of their charges would result in a full octet and the correct option is option A.

What is ionic bond?

Ionic bonds form between two or more atoms by the transfer of one or more electrons between atoms. Electron transfer produces negative ions called anions and positive ions called cations. These ions attract each other.

Ions are formed by atoms to gain the stability by achieving the next nearest noble gas configuration.

In Calcium,

Number of electrons = 20

Electronic configuration of Ca = 2,8,8,2

In Selenium,

Number of electrons = 34

Electronic configuration = 2,8,8,16

So, Ca has 2 electrons in the outermost shell that can be donated to form the ionic bond and Selenium needs 2 electrons to gain the nearest noble gas configuration.

Thus, one Calcium  donates it two electrons forming Ca²⁺ and one Selenium gains 2 electrons forming Se²⁻

Therefore, based on the ion structure, one selenium would form a bond with calcium in a one to one ratio because the combination of their charges would result in a full octet and the correct option is option A.

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Answer:

D = m/v

Explanation:

So m = 24g and v = 16mL. (I assume these are the units being used). Then, we get D = 24g/16mL which is 1.5 g/mL

As a result, the dry gas volume at STP is 45.58 cm 3.

Water vapor is present in the gas. Since H2 is created during the reaction and water vapor is irrelevant when determining the equivalent weight, we only need the dry gas. As a result, the volume of H2 gas can be calculated using the ideal gas law.

P 1 = 750 mm Hg, 14 mm Hg, 736 mm Hg V = 50 cm 3 T = 17 0 C = 290 K

P = 760mmHg, V =?cm3, T = 0 0 and C = 273K.

The Gas equation follows.

P 1V 1/ T1 = P 2V 2/ T2

290/73650 = 273/760V 2

= 290760V 2

= 7365027V 2 = 45.58 cm

As a result, the dry gas volume at STP is 45.58 cm 3.

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