At which point could the substance shown exist as a gas or a solid but not a liquid?

Final answer:

The compound being a liquid at room temperature, dissolving in water, and the resulting solution being weakly conducting indeed suggests it is a polar molecular compound. This is because its behavior aligns with polar molecular compounds' typical properties, such as solubility in water and poor conductivity compared to ionic solutions.

Explanation:

The statement that a compound is a liquid at room temperature, dissolves in water, and the resulting solution is weakly conducting, indicating that the compound is polar molecular, is true. This can be understood by considering the basic properties of molecular and ionic compounds. Molecular compounds, which are composed of molecules formed by covalent bonds, can be polar if they have an uneven distribution of electron charge. When such a polar molecular compound dissolves in water, which itself is a polar solvent, it can interact with water molecules through hydrogen bonding or dipole-dipole interactions. This explains the solubility of the compound in water.

However, the weak conductivity of the solution suggests that it does not contain free ions in large amounts, as would be expected from an ionic compound dissolved in water. Instead, the slight conductivity can be attributed to a small degree of ionization or the presence of polar molecules that are not completely non-conductive but are far less efficient in conducting electricity than ions. Therefore, considering the compound's liquid state at room temperature, its solubility in water, and its weak electrical conductivity in solution, it aligns well with the characteristics of a polar molecular compound rather than an ionic compound.

Answer:

Molaridad = número de lunares de soluto/Kg de disolvente

La molaridad se da en el problema como 0,175 m

Masa de disolvente = 347 gm = 0,347 Kg

por lo tanto

0.175 = número de lunares de LiBr / 0.347

número de lunares de LiBr = 0,175 x 0,347 = 0,060725 lunares

Explanation:

Ice has the largest volume, followed by liquid water, and then water vapor.

Water is one of the few substances on Earth that exists naturally in all three states: solid (ice), liquid (water), and gas (water vapor). The density of each state of water varies, with the vapor state being the least dense and the liquid state being the most dense. The solid state, which is ice, is less dense than the liquid state. So, in terms of volume, the ice sample will have the largest volume, followed by the liquid water sample, and then the water vapor sample, which will have the smallest volume.

On Ed. the exact answer is 0.0066.

The ionization energy is the amount of energy needed to remove a valence electron. Valence electrons are the outermost electrons.

Answer: The correct answer is option B.

Explanation:

Average kinetic energy of the gas molecule is given by relation:

[tex]E_K=\frac{3}{2}\frac{R}{N_A}\times T[/tex]

[tex]N_A[/tex] = Avogadro Number

T = Temperature of the gas in Kelvins.

R = Universal gas constant

[tex]E_K\propto T[/tex]

With increase in temperature the kinetic energy of the gas molecule increases and vice-versa.

So, according to the question the explanation for a drop in temperature of the gas is decrease in average kinetic energy of the gas molecules.

Hence, the correct answer is option B.

Alkanes from highest to lowest boiling points:

Alkanes are saturated hydrocarbons with all carbon bonds being single bonds

General formula:

[tex]\large{\boxed {\bold {C_nH_{2n + 2}}}[/tex]

There are several rules for naming alkanes from IUPAC:

In determining the alkane boiling point, if in the same homologous series, then just look for alkanes with the largest relative molecular mass that will have a large boiling point too. So in an alkane in the form of a straight-chain, the more carbon atoms, the longer the main chain, the bigger the boiling point.

But if the relative molecular mass is the same, the alkanes have fewer branches will have a greater boiling point.

The more branches, the lower the boiling point, even though the number of carbon atoms is the same (as in isomers)

In isomers that have the same molecular formula and relative molecular mass, alkanes that have the fewest branches will have the largest boiling point.

So that the general determination of the alkane boiling point is (based on its priority)

the greater the higher the boiling point

the fewer branches the higher the boiling point

The branching on the main chain in the alkane structure causes the attraction between the molecules to be lower so that to release this attractive force only requires low energy, ie at low temperatures

The relative molecular mass of each alkane in the above problem is:

The relative molecular mass values ​​above indicate that there are similarities in the relative molecular mass values ​​of heptane and 3.3 dimethyl pentane. But because the unbranched chain has a higher boiling point so heptane has a greater boiling point than 3.3 dimethyl pentane

the name of this hydrocarbon

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 the correct name of the compound

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type of organic compound contains the following functional group

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Keywords: alkanes, main chains, branches, boiling points, relative molecular mass

Charles’s law, Avogadro’s law, and Boyle’s law can be combined to form the ideal gas law.

Boyle's law is an experimental gas law which describes how the pressure of the gas decreases as the volume increases. It's statement can be stated as, the absolute pressure which is exerted by a given mass of an ideal gas is inversely proportional to its volume provided temperature and amount of gas remains unchanged.

Mathematically, it can be stated as,

P∝1/V or PV=K. The equation states that the product of of pressure and volume is constant for a given mass of gas and the equation holds true as long as temperature is maintained constant.

According to the equation the unknown pressure and volume of any one gas can be determined if two gases are to be considered.That is,

P₁V₁=P₂V₂

Learn more about Boyle's law,here:

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Answer: Amount of heat required to vaporize 84.8 g of water is 191.7kJ.

Explanation: We are given 84.8 grams of water, to convert it into moles, we use the formula:

[tex]Moles=\frac{\text{Given mass}}{\text{Molar mass}}[/tex]

Molar mass of water = 18 g/mol

[tex]Moles=\frac{84.8g}{18g/mol}=4.71moles[/tex]

As we know that [tex]\Delta H_{vap}[/tex] for 1 mole of water at 100° C is 40.7 kJ/mol

So, to calculate the amount of heat required, we use the formula:

[tex]q=m\Delta H_{vap}[/tex]

Putting the values in above equation, we get

[tex]q=4.71mol\times 40.7kJ/mol[/tex]

q = 191.7kJ

Answer:

its true for apex ;)

Explanation:

The Ksp, or solubility product constant, of a generic salt AB₂ at 25 °C with a solubility of 0.0420 mol/L is 2.96 × 10⁻⁴.

The student has asked to find out the Ksp of a generic salt AB₂ at 25 °C, when its solubility is given.

The solubility product constant (Ksp) is the equilibrium constant for the dissolution of a solid substance into an aqueous solution. Considering the stoichiometry of the generic salt AB₂, when it dissolves in water, it dissociates into one A²⁺ ion and two B⁻ ions.

The solubility equilibrium reaction is:
AB₂(s) → A²⁺(aq) + 2B⁻(aq)

Since the solubility is 0.0420 mol/L for AB₂, the concentration of A²⁺ will be 0.0420 M and the concentration of B⁻ will be 2 × (0.0420) M = 0.0840 M in the solution.

Using the expression for Ksp:

Ksp = [A²⁺][B⁻]² = (0.0420)×(0.0840)²

We calculate Ksp:

Ksp = (0.0420)×(0.007056) = 2.96 × 10⁻⁴

Thus the Ksp for AB₂ at 25 °C is 2.96 × 10⁻⁴.

Answer:

2.0 x 10^2g

Explanation:

The sequences of the geological happenings in the periodical order is called the geological time's scale. The card of the third row depicts the first flowering plant.

Events of the evolution can be explained based on the geological timelines and are arranged on the basis of their discoveries. In the question, the order of the events is arranged from the earliest to the newest.

The earliest event was the appearance of life in the sea followed by the rock formation. The third event was the appearance of the flowering plant on the land followed by land animals.

Therefore, the third card depicts the flowering land plant.

Learn more about flowering plants here:

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Answer:

Liquid a has a lower boiling point than liquid  b.

Explanation:

Hello,

In this case, volatility is associated with three factors:

1. Vapor pressure: this is the pressure exerted by the gas molecules in equilibrium with the liquid. The higher the vapor pressure, the higher the volatility.

2. Intermolecular forces: are the interactions attracting or repelling the material's molecules. The stronger the forces, the lower the volatility as the molecules remain strongly closer.

3. Boiling point: is the condition of both temperature and pressure at which a liquid passes from liquid to gas. The lower the boiling point, the higher the volatility as more molecules easily pass from liquid to gas.

In such a way since liquid a is more volatile than liquid b, the answer is liquid a has a lower boiling point than liquid  b based on the aforesaid factors.

Best regards.

Final answer:

The mass of nitric oxide expected to be produced from reacting 88.9 g of ammonia with excess oxygen is 156.7 g after balancing the chemical equation and performing stoichiometry calculations.

Explanation:

Calculating Mass of Nitric Oxide Produced from Ammonia:

To find the mass of nitric oxide that can be produced from reacting 88.9 g of ammonia with excess oxygen, first we need to balance the chemical equation. The balanced equation is:

4NH3(g) + 5O2(g) → 4NO(g) + 6H2O(g)

Next, we use the molar mass of ammonia (NH3) which is 17.03 g/mol to convert 88.9 g of NH3 to moles:

88.9 g NH3 ÷ 17.03 g/mol = 5.22 moles of NH3

Since the balanced equation shows that 4 moles of NH3 produce 4 moles of NO, we can calculate the moles of NO produced from 5.22 moles of NH3:

(5.22 moles NH3) × (4 moles NO / 4 moles NH3) = 5.22 moles NO

Finally, using the molar mass of NO (30.01 g/mol), we find the mass of NO produced:

(5.22 moles NO) × (30.01 g/mol) = 156.7 g NO

Therefore, we expect to make 156.7 g of nitric oxide from the reaction of 88.9 g of ammonia with excess oxygen.