a. water in a 150 ml container volume with a diameter of 12 cm evaporates faster and therefore has a greater vapor pressure than a container with a volume 75 ml a diameter of 5.5 cm

Answer:

The pH of a solution with a (H+] = 0.80 M is  \(9.6^{-2}\)

Explanation:

pH = -[log H+]

Substituting the value of H+ ion concentration in the above equation, we get -

pH = -log [0.80]

pH= \(- (-0.096) = 0.096=9.6 e^{-2}\)

molar mass of PF5 = 125.966 g/mol

125 g PF5 × (1 mol PF5/125.966 g PF5) = 0.992 mol PF5

0.992 mol PF5 × (6.022 × 10^23 molecules PF5);

= 5.97 × 10^23 molecules PF5

Since there 5 fluorine atoms per molecule of PF5,

(5.97.× 10^23 molecules PF5) × (5 atoms F/1 molecule PF5)

= 2.99 × 10^24 atoms F

Answer:

the answer would be the first one, gamma decay

A process which involves the use of γ photons as the projectiles causing the emission of nucleons from the target is referred to as a photonuclear reaction. In gamma decay, the nucleus become more stable without changing its identity. The correct option is A.

According to the theory of radioactive disintegration the atoms of all the radioactive elements undergo spontaneous disintegration with the emission of α, β or γ particles to yield atoms of new elements. The unstable nuclei of radioactive elements decay be emitting α, β or γ radiations.

In gamma decay there is no change in the number of protons, so the atom does not become a different element. But both the α and β decay change the number of protons in the nucleus of the atom and thereby change the atom to a different element.

Thus the correct option is A.

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Answer:

A. 7

(assuming the water is neutral)

Answer:

–87.3 KJ.

Explanation:

The equation for the reaction is given below:

H₂(g) + ½O₂(g) —> H₂O(l) ∆H = -285.8 kJ

Next, we shall determine the mass of H₂O produced from the balanced equation. This can be obtained as follow:

Molar mass of H₂O = 18 g/mol

Mass of H₂O from the balanced equation = 1 × 18 = 18 g

SUMMARY:

From the balanced equation above,

When 18 g of H₂O was produced, ∆H was –285.8 KJ.

Finally, we shall determine ∆H when 5.5 g of H₂O is produced. This can be obtained as illustrated below:

From the balanced equation above,

When 18 g of H₂O was produced, ∆H was –285.8 KJ.

Therefore, 5.5 g of H₂O will produce ∆H of = (5.5 × –285.8) / 18 = –87.3 KJ

Thus, the ∆H when 5.5 g of H₂O was produced is –87.3 KJ.

Answer:

150.5 °C

Explanation:

From the question given above, the following data were obtained:

Initial volume (V₁) = 4 L

Initial temperature (T₁) = 35 °C

Final volume (V₂) = 5.5 L

Final temperature (T₂) =?

Next, we shall convert 35 °C to Kelvin temperature. This can be obtained as follow:

T(K) = T(°C) + 273

Initial temperature (T₁) = 35 °C

Initial temperature (T₁) = 35 °C + 273

Initial temperature (T₁) = 308 K

Next, we shall determine the final (i.e the new) temperature of air. This can be obtained as follow:

Initial volume (V₁) = 4 L

Initial temperature (T₁) = 308 K

Final volume (V₂) = 5.5 L

Final temperature (T₂) =?

V₁ / T₁ = V₂ / T₂

4 / 308 = 5.5 / T₂

Cross multiply

4 × T₂ = 308 × 5.5

4 × T₂ = 1694

Divide both side by 4

T₂ = 1694 / 4

T₂ = 423.5 K

Finally, we shall convert 423.5 K to celsius temperature. This can be obtained as follow:

T(°C) = T(K) – 273

T₂ = 423.5 K

T₂ = 423.5 – 273

T₂ = 150.5 °C

Thus, the new temperature of the air is 150.5 °C

Answer:

Explanation:

Two possible changes are

Answer:

Conservation of Energy and Mass

The law of conservation of mass states that in a chemical reaction mass is neither created nor destroyed. For example, the carbon atom in coal becomes carbon dioxide when it is burned. The carbon atom changes from a solid structure to a gas but its mass does not change.

Answer:

Explanation:

To find the speed given the kinetic energy and mass we use the formula

\(v = \sqrt{ \frac{2KE}{m} } \\ \)

where

m is the mass

v is the speed

From the question

KE = 15 J

m = 2.3 kg

We have

\(v = \sqrt{ \frac{2 \times 15}{2.3} } = \sqrt{ \frac{30}{2.3} } \\ = 3.61157559...\)

We have the final answer as

Hope this helps you

Explanation

NH4Cl(s) = NH4+(aq) + Cl-(aq) AH = +3.5 kcal/mole

We have some changes that shift the equilibrium to the right, according to Le Châtelier's principle.

I will write some of them:

By Adding amount of NH4Cl or by increasing the temperature because according to the heat of the reaction this is an endothermic reaction.

Answer: Increasing the temperature of the system.

In the titration of a weak acid with a strong base, the point where half of the acid has reacted with the base is noteworthy because the ph equals: the pKa.

In layman's terms, pKa is a measurement of an acid's strength. A strong acid will have a pKa value that is lower than 0. To be more specific, pKa is the Ka value's negative log base ten value (acid dissociation constant). It gauges an acid's potency by determining how firmly a proton is retained by a Bronsted acid.

The strength of the acid and its capacity to donate protons increase with decreasing pKa values.

Acid dissociation constant, Ka, gauges how well an acid separates from its water-soluble constituents. Since acid generally dissociates into its ions, the stronger the acid, the higher the value of Ka.

The following equation describes the connection between pKa and Ka:

pKa = –log[Ka]

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Answer:

The copper oxide can then react with the hydrogen gas to form the copper metal and water. When the funnel is removed from the hydrogen stream, the copper was still be warm enough to be oxidized by the air again.

Explanation:

Answer:

hope it helps you

Explanation:

Once one shell is full, the next electron that is added has to move to the next shell. So... for the element of NEON, you already know that the atomic number tells you the number of electrons. That means there are 10 electrons in a neon atom.

Answer:

Dispersion forces are manifested as instantaneous charge differences due to molecular interactions

Explanation:

The molar solubility of Lead (II) carbonate is 3.87 × 10⁻⁷.

Molar solubility (M) is defined as a unit of measurement for a compound's capacity to dissolve in a particular liquid, also known as a solvent. Molar solubility is generally measured in terms of moles/L since it is the most moles of a solute that can dissolve in one liter of solvent. The solution is known to be saturated when it can no longer dissolve any more solute and the number of moles dissolved in a liter of solvent equals the molar solubility.

The ionization equation for PbCO₃ is given as:

PbCO₃ → Pb²⁺ + CO₃²⁻

Ksp = [Pb²⁺][CO₃²⁻] = (Molar solubility)²

Given,

Ksp = 1.5 x 10⁻¹³

Molar solubility = √(Ksp)

⇒ Molar solubility = √(1.5×10⁻¹³)

⇒ Molar solubility = 3.87 × 10⁻⁷

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The property of life this represent is photosynthesis.

Photosynthesis is a process in which plants use sunlight, carbon dioxide, and water to produce sugar. This sugar is subsequently converted into ATP, which is used to power the cell. This represents the characteristic of life known as energy processing. The photosynthesis process requires three important ingredients; carbon dioxide (CO2), light, and water (H2O).

When these ingredients are mixed together, the process of photosynthesis begins. In plants, photosynthesis occurs in chloroplasts. These organelles contain chlorophyll, which is a green pigment that absorbs light.The energy absorbed from sunlight is utilized to transform carbon dioxide and water into glucose and oxygen. Oxygen is then released from the plant through tiny pores called stomata. Glucose, on the other hand, is converted to ATP through the process of cellular respiration.

ATP is then used to power various cell functions.The process of photosynthesis is critical to the life of a plant. It allows the plant to produce its own food, which is then used to provide energy for all cellular functions. This represents the characteristic of life known as energy processing.Plants are known as autotrophs because they create their own food. In contrast, animals are heterotrophs because they depend on other organisms for food.

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Answer:

The limiting reactant is H₂

Explanation:

The reaction of hydrogen (H₂) and carbon monoxide (CO) to produce methanol (CH₃OH) is the following:

2H₂(g) + CO(g) → CH₃OH(g)

From the balanced chemical equation, we can see that 1 mol of CO reacts wIth 2 moles of H₂. So, the stoichiometric ratio is:

2 mol H₂/1 mol CO = 2.0

We have 500 mol of CO and 750 mol of H₂, so we calculate the ratio to establish a comparison:

750 mol H₂/500 mol CO = 1.5

Since 2.0 > 1.5, we have fewer moles of H₂ than are needed to completely react with 500 moles of CO. In fact, we need 1000 moles of H₂ and we have 750 moles. So, the limiting reactant is H₂.

The temperature of the water and the chromium : 25.122 ° C  

The law of conservation of energy can be applied to heat changes, i.e. the heat received / absorbed is the same as the heat released  

Q in(gained) = Q out (lost)

Heat can be calculated using the formula:  

Q = mc∆T  

Q = heat, J  

m = mass, g  

c = specific heat, joules / g ° C  

∆T = temperature difference, ° C / K  

Q Chromium= Q water

\(\tt 60\times 0.11\times (82-t)=80\times 4.18\times (t-24)\\\\541.2-6.6t=334.4t-8025.6\\\\341t=8566.8\\\\t=25.122^oC\)

Answer:

There are 24*60 minutes in a day (ignoring the imperfections of the natural world, the Earth and Sun). So there are 24*60 valid 24 hour times (excluding seconds) on a digital clock.

A measure of time representing the interval between consecutive passages of the Sun across the meridian, averaged over one year. 1 day = 24 hr (86,400 sec) and 60 minutes.

hope it helps ya mate! :-P

Answer:

Plant cells have a cell wall, chloroplasts and other specialized plastids, and a large central vacuole, which are not found within animal cells. The cell wall is a rigid covering that protects the cell, provides structural support, and gives shape to the cell.

Explanation:

MOST BRAINLIEST

0.005 g of Cr are present in 1000 g of water.

What does "parts per million" mean?

This stands for "parts per million" and can also be written as mg/L (milligrams per liter). The mass of a chemical or contamination per volume of water is the unit of measurement here.

PPM, or parts per million, is a word used to describe a solution's concentration. In 1000 ml or 1 L of solution, 1 milligram of the solute equates to 1 ppm.

It is assumed that water contains 5 parts per million (ppm), or 5 mg of Cr per liter. 1000 ml or 1000 g is equal to one liter of water. Therefore, 5 mg or 0.005 g of Cr are present in 1000 g of water.

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The correct formula of the molecule is C4H9O2.

The model of a compound is a representation of the molecule. It gives us an idea of what the molecule looks like as well as its molecular formula.

Looking at the structure of the compound as shown in the model in the question, the correct formula of the molecule is C4H9O2.

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Answer:C4H9O2.

Explanation:

Answer:

5.80

Explanation:

The difference between the critical angles for red and green light is equal to the difference between the sine of the two angles, or sin(θc, red) - sin(θc, green).

The critical angle is the angle of incidence (angle between the incoming light and the normal to the surface) at which the refracted ray is just grazing the surface and no further refraction occurs. Beyond this angle, the light will start to reflect back into the medium from which it came, and not enter the second medium. The critical angle is determined by the refractive indices of the two media and is dependent on the ratio of their refractive indices.

The critical angle for red light in flint glass surrounded by air is given by the equation sin(θc) = nair/nflint, where nair is the refractive index of air (approximately 1) and nflint is the refractive index of flint glass (1.662 for red light). The critical angle for green light is calculated in the same manner, using the refractive index of flint glass for green light (1.674).

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The reaction you're describing is an oxidative cleavage reaction where a cyclic alkene reacts with ozone (O3) . and the product formed is cyclic ozonide. so correct option is A)cyclic ozonide.

reducing agent such as zinc (Zn) and acetic acid (CH3CO2H) or dimethyl sulfide (S(CH3)2) to form a pair of carbonyl compounds. The general reaction can be represented as follows:

Cyclic alkene + O3 + reducing agent → Carbonyl compounds

For example, let's consider the reaction between cyclohexene (a cyclic alkene) and ozone in the presence of zinc and acetic acid:

C6H10 + O3 + Zn/CH3CO2H → C5H8O2 + C2H4O

In this reaction, the double bond of cyclohexene is broken and two carbonyl groups are formed. One of the products is the ketone cyclopentanone, while the other is the aldehyde acetaldehyde.

The reaction mechanism involves the formation of an ozonide intermediate, which is then reduced by the reducing agent to form the carbonyl compounds.

Note that the oxidative cleavage of cyclic alkenes can also lead to the formation of different products, depending on the nature of the alkene and the reducing agent used.

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the complete questions is :

cyclic alkene + O₃ + Zn/Ch₃O₂H or S(CH₃)₂→

What is the product formed when a cyclic alkene reacts with ozone and Zn/Ch3CO2H?

A) cyclic ozonide

B) cyclic alkene

C) cyclic hexane

D) pentane

Answer:

Option b (V1/T1 = V2/T2) is the right alternative or the new volume will be "0.048 L".

Explanation:

The given values are:

Temperature,

T₁ = 25°C

or,

   = 298.15 K

T₂ = 50°C

or,

    = 323.15 K

Volume,

V₁ = 45 mL

or,

    = 0.045 L

V₂ = ?

As we know,

⇒  \(\frac{V_1}{T_1} =\frac{V_2}{T_2}\)

Or,

⇒  \(V_2=\frac{V_1\times T_2}{T_1}\)

On substituting the values, we get

⇒       \(=\frac{0.045\times 323.15}{298.15}\)

⇒       \(=\frac{14.541}{298.15}\)

⇒       \(=0.048 \ L\)

Answer: I don’t know lol

Explanation:  I am so sorry I thought this was easy

Answer:

Ant.

Explanation:

The dog would be the most frantic, when all are compared at an equal speed of 30 mph. An ant of such strength, has six jointed legs and has an exoskeleton. An Ant of such size(mass) and weight would have take off with better traction too(6 legs). So the Ant would have the greatest kinetic energy. Also it would take turns while fleeing from the wildfire, while running at almost 30 mph while the other animals wouldn't come that close.

It is technically and literally illogical to say an ant can do 30 mph in its regular size.

Dont believe me? Watch ants scurrying away when threatened and taking turns and U-turns. Six legs offer more energy while fleeing by instinct. Literally six legs at 30 mph. Crazy!

Answer:

Tropical deserts and temperate deserts differ in terms of their location, temperature, and precipitation patterns.

Tropical deserts are found near the equator and typically have hot temperatures year-round, with average temperatures ranging from 80 to 100°F (27 to 38°C). They receive very little rainfall, usually less than 10 inches (25 cm) per year, and may experience long periods of drought. Examples of tropical deserts include the Sahara in Africa, the Arabian Desert in the Middle East, and the Mojave Desert in North America.

In contrast, temperate deserts are located in the middle latitudes and have more variable temperatures, with hot summers and cold winters. Average temperatures range from 55 to 75°F (13 to 24°C). They also receive very little rainfall, usually less than 10 inches (25 cm) per year, but may receive more precipitation in the form of snow during the winter months. Examples of temperate deserts include the Sonoran Desert in North America and the Gobi Desert in Asia.

Overall, both types of deserts are characterized by their arid conditions, but tropical deserts tend to be hotter and have more consistent temperatures throughout the year, while temperate deserts have more variation in temperature between seasons.

Explanation:

Temperature influences the spontaneity of a reaction by affecting both the enthalpy (ΔH) and entropy (ΔS) terms in the Gibbs free energy equation. The balance between these two factors determines the direction and spontaneity of the reaction.

Temperature plays a significant role in determining whether a reaction is spontaneous or not. To understand this, let's first review the concept of Gibbs free energy (ΔG). Gibbs free energy is a thermodynamic property that measures the maximum amount of useful work that can be extracted from a system at constant temperature and pressure.

ΔG is related to spontaneity through the equation: ΔG = ΔH - TΔS

In this equation, ΔH represents the change in enthalpy (heat content) of the system, ΔS represents the change in entropy (disorder) of the system, and T is the temperature in Kelvin.

Temperature and Enthalpy (ΔH):

The enthalpy change of a reaction, ΔH, reflects the difference in energy between the reactants and the products. Reactions can be either exothermic (ΔH < 0) or endothermic (ΔH > 0). When the temperature is low, an exothermic reaction has a more negative ΔH, making the ΔG term (ΔH - TΔS) more negative. Consequently, the reaction is more likely to be spontaneous. Conversely, at high temperatures, the ΔH term becomes less negative, reducing the overall spontaneity of the reaction.

Temperature and Entropy (ΔS):

Entropy, ΔS, measures the degree of disorder in a system. Generally, reactions that lead to an increase in the total number of product molecules have a positive ΔS. Increased disorder (positive ΔS) contributes to a negative ΔG term, making the reaction more likely to be spontaneous. Higher temperatures favor a greater degree of disorder, enhancing the spontaneous nature of reactions with positive ΔS.

Temperature and ΔG:

The relationship between temperature and spontaneity is directly related to the ΔG term in the equation ΔG = ΔH - TΔS. When ΔG is negative, the reaction is spontaneous. Conversely, when ΔG is positive, the reaction is non-spontaneous. If the reaction is at equilibrium, ΔG is zero. At low temperatures, the ΔH term predominantly influences the spontaneity of the reaction, while at high temperatures, the ΔS term becomes more significant.

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Answer: CaCO3 + 2HNO3 -> Ca(NO3)2 + H2O + CO2

Explanation: