please mark all that apply!

Answer:

131.293 u

Explanation:

Answer:

Its still a liquid, only it takes form of the bottle.

Explanation:

When you pour a liquid (water) in a bottle, the water is still water but the water takes shape of the bottle. Hope this helps! Let me know if you need clarification.

Answer: D. negative

Explanation:

The statement is FALSE. Non-ferrous metals can be hardened by heat treatment, although the mechanisms and processes involved may differ from ferrous metals.

Heat treatment techniques such as precipitation hardening can be used to increase the strength of non-ferrous metals. Non-ferrous metals are metals or alloys that do not include iron (or iron allotropes, such as ferrite, etc.) in significant quantities. Non-ferrous metals are employed because they have desired qualities like reduced weight (for example, aluminium), greater conductivity (for example, copper), non-magnetic characteristics, or corrosion resistance (for example, zinc), even though they are often more expensive than ferrous metals. In the iron and steel sectors, several non-ferrous materials are also employed. Bauxite, for instance, is used as a flux in blast furnaces, whereas wolframite, pyrolusite, and chromite are utilised to create ferrous alloys.

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The systematic name for the given formula Pt(en)2Br22 is bis(ethylenediamine)dibromidoplatinum(IV) perchlorate.

In the systematic name, the prefix "bis" indicates that there are two ethylenediamine ligands, "dibromido" signifies the presence of two bromide ligands, "platinum(IV)" denotes the oxidation state of the platinum ion, and "perchlorate" represents the anion ClO4-. The overall coordination complex is enclosed in square brackets to indicate its unity.

The ethylenediamine ligand (en) is a bidentate ligand, meaning it coordinates to the metal ion through two nitrogen atoms. The presence of two bromide ligands and two perchlorate anions further completes the coordination sphere of the platinum ion.

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The pair of compounds that will not form a buffer solution is option d, NaF and HF.

To form a buffer solution, we need a weak acid and its conjugate base or a weak base and its conjugate acid. So, the pair of compounds that will not form a buffer solution is the one that does not have a weak acid and its conjugate base or a weak base and its conjugate acid.

a. NH3 and NH4Cl can form a buffer solution because NH3 is a weak base and NH4+ is its conjugate acid.

b. RBOH and HBr will not form a buffer solution because RBOH is a strong base and does not have a conjugate acid.

c. NaC2H3O2 and HC2H3O2 can form a buffer solution because HC2H3O2 is a weak acid and C2H3O2- is its conjugate base.

d. NaF and HF will not form a buffer solution because NaF is a salt of a strong base (NaOH) and a weak acid (HF). HF is a weak acid, but there is no conjugate base present.

e. H3PO4 and KH2PO4 can form a buffer solution because H2PO4- is a weak acid and HPO42- is its conjugate base.

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Alcohol is more soluble in water than ether. And CH4 is non polar. So, CH4 will be almost insoluble water.

CH3OH - most soluble

CH3-O-CH3 - second

CH4 - least soluble.

Solubility is defined as the maximum amount of a substance that will dissolve in a specified amount of solvent at a specified temperature. Solubility is a characteristic property of a particular solute/solvent combination, and different substances have very different solubilities.

Solubility can be expressed in grams of solute in one liter of saturated solution. For example, the solubility in water at 25 oC is 12 g/L. Molar solubility is the number of moles of solute per liter of saturated solution. For example, 0.115 mol/L at 25 oC

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When the author states that "on a molecular level, no one compound is grosser than any other," he is suggesting that at the smallest level of matter, which is the molecular level, there is no inherent difference between different compounds.

All compounds are made up of molecules, which are simply collections of atoms. The atoms themselves are made up of protons, neutrons, and electrons, which are all subatomic particles.

Thus, the author is saying that on a molecular level, all compounds are made of the same basic building blocks, and therefore, no one compound is fundamentally different or "grosser" than any other. It could be that the author is trying to make a point about the subjective nature of describing something as "gross" or not, and how this is not a scientifically valid way to measure the properties of a compound.

In summary, the author is pointing out that at the molecular level, all compounds are made up of the same building blocks, and therefore, one compound is not inherently "better" or "worse" than another.

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The hydrologic cycle, another name for the water cycle, describes where and how water is kept on Earth.

In the atmosphere, on the surface of the land, and underground, water is kept in reserve. It could be a gas, a liquid, or a solid. Either fresh or salt water can be a liquid (salty).

Water flows between its storage locations. It flows on both extremely tiny scales and very big scales (via watersheds, the atmosphere, and below the Earth's surface) (in people, in plants, and in other organisms).

Water flows both naturally and as a result of human activity. The motion of water on Earth is sustained by the force of gravity and solar energy. The water cycle is impacted by human activity because it changes where water is.

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The volume of 0.15 mol of an ideal gas at 365 torr and 97 °C is 9.5 L.

An ideal gas is a hypothetical gas that follows the ideal gas law, which states that the pressure, volume, and temperature of an ideal gas are directly related.

The ideal gas law can be used to calculate the volume of an ideal gas, given the number of moles, temperature, and pressure.

The ideal gas law equation is: PV = nRT.

Rearranging the equation to solve for volume, the equation is V = nRT/P. Plugging in the given values, the volume of 0.15 mol of an ideal gas at 365 torr and 97 °C is 9.5 L.

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B because decomposition reactions are often caused by the application of heat to break up the bonds within the molecules, which will form the molecules that made up the decomposed molecule.

Answer:

The chlorate anion has the formula ClO⁻ ₃. In this case, the chlorine atom is in the +5 oxidation state. "Chlorate" can also refer to chemical compounds containing this anion; chlorates are the salts of chloric acid.

"S" typically represents the oxidation state or oxidation number of an element in a chemical compound. For the chlorate ion (ClO₃⁻), the oxidation state of chlorine (Cl) is +5.

The oxidation number, also known as the oxidation state, of an element in a chemical compound is a numerical value that indicates the electron distribution and the degree of electron loss or gain by an atom in a chemical reaction. It helps to identify the type of chemical bonding and the role of each element in the compound.

The chlorate ion (ClO₃⁻) has a chemical formula of ClO₃⁻ where:

Cl: Chlorine has an oxidation state of +5 since oxygen (O) is known to have an oxidation state of -2 and the overall charge of the ion is -1.

O: Oxygen has an oxidation state of -2.

So, the oxidation state of chlorine in the chlorate ion is +5.

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The list that consists of elements that have the most similar chemical properties is caesium, sodium and potassium (option D).

Periodic table is the tabular chart of the chemical elements according to their atomic numbers so that elements with similar properties are in the same group (column).

The periodic table is made up of chemical elements arranged in groups and periods. Chemical elements in the same group possess similar chemical properties.

According to this question, the following elements are in the same group 1:

Therefore, Cs, K and Na will have the most similar chemical properties because they belong to the same group.

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The empirical formula of the compound is C₅H₁₂O₁₂, and the molecular formula of this compound is C₈H₁₈O₁₈.

To determine the empirical formula, we need to determine the moles of each element present in the compound. From the data given, we know that complete combustion of 0.150g of the compound produces 0.225g of CO₂ and 0.0614g of H₂O. We know that CO₂ is composed of one carbon atom and two oxygen atoms, and H₂O is composed of two hydrogen atoms and one oxygen atom. Therefore,

the moles of carbon present is 0.225g / (12.01 + 2(16.00)) = 0.0125 moles.

The moles of hydrogen present is 0.0614g / (2(1.008)) = 0.03 moles.

The moles of oxygen present is 0.225g / 16.00 + 0.0614g / 16.00 = 0.03 moles.

The ratio of these moles is C:H:O = 0.0125:0.03:0.03

To simplify this ratio we divide each number by the smallest number:

C:H:O = 5:12:12

So, the empirical formula of the compound is C₅H₁₂O₁₂

To find the molecular formula, we know that the molecular weight of the compound is 264 g/mol. Since the empirical formula weight of the compound is (512.01) + (121.008) + (12×16.00) = 180.24 g/mol. To find the ratio of the molecular weight to the empirical formula weight, we divide 264 by 180.24, which is approximately 1.47. Therefore, the molecular formula of the compound is:

C₅H₁₂O₁₂ × (1.47)¹ = \(C_{7.4}\)\(H_{17.4\)\(O_{17.4}\) which can be simplified to C₈H₁₈O₁₈.

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Therefore, the new temperature of the gas is 1280 K.The initial volume of the gas is 100 L and the initial temperature is 320 K. The pressure remains constant as the volume increases to 400 L. To find the new temperature of the gas, we can use the formula for Charles's Law.

Charles's Law states that the volume of a gas is directly proportional to its temperature, as long as the pressure and the amount of gas remain constant. This can be expressed as V1/T1 = V2/T2, where V1 and T1 are the initial volume and temperature, and V2 and T2 are the final volume and temperature.

In this case, we can plug in the values we know:We need to solve for T2, the new temperature. Rearranging the equation, we get: T2 = (V2 * T1) / V1
T2 = (400 * 320) / 100
T2 = 1280 K

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Answer:

B,D.

Explanation:

Answer:the motion of Earth around the Sun , the motion of Earth around the Sun ,  ,

the motion of electrons in an atom

Explanation:

The molecular formula of diazomethane is CH₂N₂, and the main reason for its instability is precisely the fact that it can very easily evolve nitrogen, as nitrogen's triple bond is one of the strongest covalent bonds in nature, and the energy released in its formation is more than enough to compensate the energy lost in the breaking of C-N bonds. The Lewis structure of diazomethane with the formal charges is attached below.

To obtain the molecular formula of diazomethane, we can imagine that we have 100 g of it. Now we can calculate the number of moles (n) for each of the elements, using their respective masses (m) and molar masses (M = 12 g/mol for carbon, 1 g/mol for hydrogen, and 14 g/mol for nitrogen):

n = m/M

n(C) = 28.57 g / 12 g/mol

n(C) = 2.38 mol

n(H) = 4.80 g / 1 g/mol

n(H) = 4.80 mol

n(N) = 66.64 g / 14 g/mol

n(N) = 4.76 mol

We now divide each of these numbers with the smallest of them (2.38) to calculate the molar ratio of the elements:

carbon: 2.38 / 2.38 = 1

hydrogen: 4.80 / 2.38 = 2

nitrogen: 4.76 / 2.38 = 2

Now we use these numbers to get the empirical formula of diazomethane: CH₂N₂.

The molar mass of the empirical formula is:

12 g/mol + 2 * 1 g/mol + 2 * 14 g/mol = 42 g/mol

Since this value is equal to the molar mass given to us, that means that CH₂N₂ is also the molecular formula of diazomethane.

Answer:

c. carry materials to all parts of the body

Explanation:

The lungs and tissues receive oxygen and nourishment via blood.

A refrigerator delays the spoilage of food by slowing down the rate of chemical reactions within microorganisms. Therefore, option B is correct.

The term chemical reaction is defined as the processes, in which substances undergo a chemical change to formed new substances, with all new properties.

Higher temperatures often result in faster chemical reactions. When food is left on the kitchen counter, it can soon become bad. The process is slowed down by the refrigerator's lower temperature, which allows the same food to stay fresh for longer.

Bacteria, molds, and yeasts are all potential sources of microbial deterioration. Food's water activity plays a significant role in determining the type of food decomposition that results.

Thus, option B is correct.

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Answer: Salt is primarily composed of sodium chloride.

Explanation:

Answer:

The mean value theorem tells us the average velocity must be between the minimum velocity and the maximum velocity. The only way it can be either the minimum or the maximum is if velocity is constant. So of course instantaneous velocity can be greater and can be less.

Explanation:

Answer:

15.68 Joules

Explanation:

In physics, work is defined as the energy that is transferred to or from an object by a force that displaces that object some distance.  The SI unit for work is a Joule, which itself is defined as 1 kg*m^2/s^2.

The attached file explains the steps to cacluate work done in raising the 2 kg book 0.8m.

The descriptions and scientific names of both animals, it can be concluded that the physical lynx and bobcat are not the same species as they have different scientific names - Lynx canadensis and Lynx rufus.

The differences in their physical characteristics, such as the pattern and visibility of their tail and ear tufts, further support the idea that they are different species. However, they are in the same genus, which is Lynx. Therefore, option C is the correct answer. It is important to note that even though they are different species, they share similar characteristics and are often confused with each other. Both the lynx and bobcat are medium-sized wild cats that are native to North America and are known for their elusive nature and hunting abilities.

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Molarity is the concentration of a solution stated as the number of moles of solute per liter of solution, whereas molality is the concentration expressed as the number of moles of solute per kilogram of solvent.

Because molality is unaffected by changes in volume brought on by changes in temperature and pressure, it is employed in examinations of collinear characteristics, which is crucial in figuring out how solutes affect these qualities. Molarity is a measure of the concentration of a solution and is defined as the number of moles of solute present per liter of solution. It is denoted by the symbol "M" and is expressed in units of moles per liter (mol/L). Molarity is used to describe the amount of a solute that is dissolved in a solvent, where the solvent is usually water. This measurement is important in many chemical reactions and is used to calculate the number of reactants and products present in a solution. Molarity can be calculated by dividing the number of moles of solute by the volume of the solution in liters. It is a commonly used unit in chemistry and is one of the fundamental concepts in stoichiometry.

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1s22s22p63s23p63d104s2

2.23 grams of oxygen are present in 4.20×10²² molecules of carbon dioxide.

To determine the number of grams of oxygen present in a given number of molecules of carbon dioxide, we need to calculate the molar mass of carbon dioxide and then determine the ratio of oxygen atoms to carbon dioxide molecules.

The molar mass of carbon dioxide (CO₂) can be calculated by summing the atomic masses of its constituent atoms. The atomic masses are as follows:

Carbon (C): 12.01 grams/mol

Oxygen (O): 16.00 grams/mol (each oxygen atom)

Molar mass of carbon dioxide (CO₂) = 12.01 g/mol (carbon) + 2 * 16.00 g/mol (oxygen)

= 12.01 g/mol + 32.00 g/mol

= 44.01 g/mol

This means that one mole of carbon dioxide (6.022 × 10²³ molecules) has a mass of 44.01 grams.

Now, we can determine the number of moles of carbon dioxide in 4.20 × 10²² molecules using the Avogadro's number:

Number of moles of carbon dioxide = (4.20 × 10²² molecules) / (6.022 × 10²³ molecules/mol)

= 0.0697 moles

Next, we need to find the number of moles of oxygen in this amount of carbon dioxide. In one molecule of carbon dioxide (CO₂), there are two oxygen atoms. So, the number of moles of oxygen is twice the number of moles of carbon dioxide:

Number of moles of oxygen = 2 * 0.0697 moles

= 0.1394 moles

Finally, we can calculate the mass of oxygen by multiplying the number of moles by the molar mass of oxygen:

Mass of oxygen = Number of moles of oxygen * molar mass of oxygen

= 0.1394 moles * 16.00 g/mol (molar mass of oxygen)

= 2.23 grams

Therefore, there are 2.23 grams of oxygen present in 4.20 × 10²² molecules of carbon dioxide.

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Factors that determine ionization energy:

Factors that determine atomic volume:

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