Question 16 of 30
The graph below shows how the temperature and volume of a gas vary when
the number of moles and the pressure of the gas are held constant. What
happens to the temperature of a gas as its volume increases?


A. The temperature decreases.
OB. The temperature doubles.
OC. The temperature increases.
D. The temperature remains the same.

The compounds in the reaction that shifts the equilibrium with the common ion effect are \(\rm MgSO_2\;and\;HNO_3\).

The equilibrium condition has an equal amount of reactant and products in the reaction.

The addition of ions same as product or reactant results in a change in the equilibrium of condition and shifts the equilibrium in opposite direction.

The given reaction is:

\(\rm H_2SO_4\;\rightleftharpoons 2H^+\;+\;SO_4^{2-}\)

The addition of sulfate and hydrogen ions shifts the equilibrium.

Thus, the compounds that shift the equilibrium for the reaction are \(\rm MgSO_2\;and\;HNO_3\).

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Answer:

first part is A and C second part is B

Explanation:

got 100 percent on edge

If 5.0 moles of AX react with unlimited BY₂, 2.5 moles of BX₂ are formed.

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

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

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.

Given:

A = 3.2 gram

B = 16.0 gram

X = 5.3 gram

2AX + BY₂ ⇒ BX₂ + 2AY

4Al + 3O2 → 2Al2O3

The mole ratio of AX to BX₂ = 2 :1

5 moles of AX = ½ × 5

= 2.5 moles of BX₂

Moles of BX₂ = 2.5 mol

Thus, 2.5 moles of BX₂ are formed.

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Ovulation is the process in which mature egg is released from ovary.

The process in which a mature egg is released from ovary is known as Ovulation. It occurs as a LH (Luteinizing hormone) surge. Ovulation process occurs every month. In the ovulation process the ovum enters in the fallopian tube.

A menstrual cycle is divided into four phase:

Thus from the above conclusion we can say that Ovulation is the process in which mature egg is released from ovary.  

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Answer:

Common physical changes include melting, change of size, volume, color, density, and crystal form.

Explanation:

Answer: Fruits contain seeds and develop from the ovaries of flowering plants. The first step in making fruits is pollination. Fruit trees and plants produce flowers. Then, bees, bats, birds, and even the wind spread pollen from one flower to another.

Answer:

Fruits contain seeds and develop from the ovaries of flowering plants. The first step in making fruits is pollination. Fruit trees and plants produce flowers. Then, bees, bats, birds, and even the wind spread pollen from one flower to another.

Explanation:

Answer:

Protons= 11

neutrons= 12

electrons = 10

Explanantion:

Look for Na on periodic table

Atomic Number = 11

Atomic Mass = 23 (round it to be an integer)

Number of protons = Atomic number = 11

Number of neutrons = Atomic mass - atomic number = 23-11 =12

Number of electrons = 11 - e = ´+1 , electrons = 10

Answer:

Protons= 11

neutrons= 12

electrons = 10

Explanation:

That should be the answer :)

Answer:

Move the decimal in 3.45 THREE places to the right to increase the value.

Explanation:

3.45km = 3450m (multiply by 1000)

Answer:

3rd option is the correct answer

Hope this helps!

the supports are for the influences climate of the ecosystem

define the ecosystem ?

This article discusses the ecosystem and its various components. An ecosystem is a community or collection of living and nonliving creatures and their interactions with one another. They can be both natural and manufactured. Every ecosystem is made up of two parts: biotic components and abiotic components. Biotic components are all live species in an ecosystem, whereas abiotic components are non-living substances. These biotic and abiotic interactions keep the ecosystem in balance. Let's go through the ecosystem's components in depth.

An ecosystem is a geographical region in which plants, animals, and other species, as well as weather and scenery, coexist to produce a living bubble.

the supports are for the influences climate of the ecosystem

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When cytosine reacts with NaNO2 and HCl to form Diazonium salt.

Diazonium salt or diazonium compounds are defined as the group of the organic compounds which sharing a common functional group [R−N⁺≡N]X⁻ where R is any organic group, like an alkyl or an aryl, and X can be an organic or inorganic anion, like a halide.

As we know that, Cytosine is a 6 membered ring consisting of

Thus, we concluded that the cytosine reacts with NaNO2 and HCl to form Diazonium salt.

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Answer:

Since 1982, STP is defined as a temperature of 273.15 K (0 °C, 32 °F) and an absolute pressure of exactly 105 Pa (100 kPa, 1 bar).

Explanation:

I hope I helped

At present, the greenhouse effect of carbon dioxide is not greater than that of water vapor. Thus, the given statement is false.

The amount of effect that water vapor has on the greenhouse effect is about 40-50 percent while with carbon dioxide, it accounts to 25 percent. The significant difference between them shows the different impacts on the greenhouse effect.

Both of them cause the same effects of heat, however, water vapor being a greenhouse gas is inevitable and natural.  It is much needed for life to sustain on earth, however, the numbers have increased causing an alarming rate of change that may not be good.

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When developing prints, Red light doesn’t affect the picture.

The only film you may use is a red light whilst developing it's a far orthochromatic black & white movie which isn't always touchy to crimson mild red seems black in the photographs. photograph resolution is often given in PPI pixels according to the inch. It was how many pixels are displayed in keeping with the inch inside the image. photo decision is a factor that determines picture satisfaction. but the camera sensor processor and even the great lens you're the use of also play an element.

Lighting is a key component in creating a hit picture. lighting fixtures determine now not the handiest brightness and darkness but additionally tone temper and environment. therefore, it's far important to control and control mild efficiently on the way to get the first-rate texture, vibrancy of color, and luminosity in your topics. A safelight is a light source suitable for use in a photographic darkroom. It provides illumination most effective from parts of the visible spectrum to which the photographic cloth in use is almost or absolutely insensitive.

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i think it would be neutral

Answer:

stored energy

Explanation:

stored energy that depends upon the relative position of various parts of a system

To determine the smallest frequency of light required to remove an electron from a sample of Ti metal, we can use the formula:E = hvwhereE = energy of a photonh = Planck's constant v = frequency of lightFrom the given binding energy of Ti metal, which is 3.14 × 10³ kJ/mol, we can calculate the energy required to remove one mole of electrons from Ti metal by dividing it by Avogadro's number.

1 mol of Ti contains 6.02 × 10²³ atoms. Therefore, the energy required to remove one electron from Ti metal is given as:3.14 × 10³ kJ/mol / 6.02 × 10²³ atoms/mol = 5.22 × 10⁻²⁰ J/atomWe can now find the frequency of light required to provide this energy using the formula: E = hvRearranging this equation gives: v = E/hSubstituting the value of E we just calculated and Planck's constant h = 6.626 × 10⁻³⁴ J·s:v = 5.22 × 10⁻²⁰ J/atom / 6.626 × 10⁻³⁴ J·s/Hz = 7.88 × 10¹³ Hz (approximately)Therefore, the smallest frequency of light required to remove an electron from a sample of Ti metal is approximately 7.88 × 10¹³ Hz.

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Answer:

A. The largest value is 7 and the smallest value is 1. Find the difference. 7 - 1 = 6.

Explanation:

There are some important equations that we must know:

\(PV=nRT\)

\(n=\dfrac{m}{M}\)

We're given:

First, solve for n:

\(n=\dfrac{m}{M}\)

\(n=\dfrac{128}{32.00}\\\\n=4\)

Now, solve using the Ideal Gas Law:

\(PV=nRT\)

⇒ Isolate V:

\(V=\dfrac{nRT}{P}\)

⇒ Plug in given values:

\(V=\dfrac{4*8.31*273}{101.3}\\\\V =89.6\)

a. 89.6 L

Answer:

The age of the sample is \(t \approx 6\times 10^{10}\,yr\). It is possible, since the definition of half-life is the time taken by the isotope to halve its mass.

Explanation:

All radioactive isotopes decays exponentially, the decay is represented by the following formula:

\(m(t) = m_{o}\cdot e^{-\frac{t}{\tau} }\) (1)

Where:

\(m_{o}\) - Initial mass of the isotope, measured in grams.

\(m(t)\) - Current mass of the isotope, measured in grams.

\(t\) - Time, measured in years.

\(\tau\) - Time constant, measured in years.

Now we clear the time of the isotope within the formula:

\(t = -\tau\cdot \ln \frac{m(t)}{m_{o}}\)

In addtion, the time constant can be calculated in terms of the half-life (\(t_{1/2}\)), measured in years:

\(\tau = \frac{t_{1/2}}{\ln 2}\) (2)

If we know that \(m_{o} = 2.5\,g\), \(m(t) = 1.25\,g\) and \(t_{1/2} = 6\times 10^{10}\,yr\), then the age of the isotope is:

\(\tau = \frac{6\times 10^{10}\,yr}{\ln 2}\)

\(\tau \approx 8.656\times 10^{10}\,yr\)

\(t = -(8.656\times 10^{10}\,yr)\cdot \ln \frac{1.25\,g}{2.5\,g}\)

\(t \approx 6\times 10^{10}\,yr\)

The age of the sample is \(t \approx 6\times 10^{10}\,yr\). It is possible, since the definition of half-life is the time taken by the isotope to halve its mass.

Solubility can be defined as the capacity of a substance to dissolve in another substance. The type of solvent influences the solubility of a compound. The solubility of a substance is often determined by the polarity of the solvent and the solute.

The substance will dissolve if the intermolecular forces are identical between the solvent and the solute. Conversely, if the intermolecular forces are different between the solvent and the solute, the solute will not dissolve.For each substance, designate whether you expect it to be most soluble in methanol (CH3OH), hexane (C6H14), or acetone NaClNaCl is a salt that is readily soluble in water.

This is because NaCl has a high ionic character, and both methanol and acetone are polar solvents, whereas hexane is a nonpolar solvent.b. I2I2 is nonpolar and dissolves easily in nonpolar solvents like hexane. It is, however, insoluble in polar solvents such as methanol and acetone. In this case, intermolecular forces are the driving force for solubility, and I2 lacks the ability to form hydrogen bonds.CH3OCH3 Dimethyl ether, also known as CH3OCH3, is a polar aprotic solvent. Dimethyl ether can dissolve polar and nonpolar solutes to some degree, so it is most likely soluble in all three solvents.

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Answer:

The central and most important part of an object, movement, or group, forming the basis for its activity and growth.

Explanation:

hope this helps!

Answer:

atomic nucleus is the small, dense region consisting of protons and neutrons at the center of an atom. definition for science.

Explanation:

important part of an object, movement, or group

A 1.0 × 10⁻⁸ M solution of the HCl have the pH < 7. The value of the pH for HCl is pH = 6.99.

The concentration of the HCl = 1.0 × 10⁻⁸ M

Total [H⁺] =  [H⁺]  HCl +  [H⁺] water

The HCl is the strong acid , so it completely ionizes.

[H⁺] H₂O = X

Total [H⁺] = X + 1.0 × 10⁻⁸

[H⁺] [OH⁻] = 1 × 10⁻¹⁴

X₂ + 10⁻⁸X - 10⁻¹⁴ = 0

X = 9.5 × 10⁻⁸

Total [H⁺] = 9.5 × 10⁻⁸ + 1.0 × 10⁻⁸

                = 1.05 × 10⁻⁷

pH = - log [H⁺]

pH = - log [1.05 × 10⁻⁷]

pH = 6.99.

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Osmosis is involves movement of water molecules while dialysis involves movements of solutes.

Osmosis is applied detoxification while dialysis is applied in dialysis machines.

What is dialysis is the process whereby certain molecules are able to pass through a semipermeable membrane.

Dialysis is employed in dialysis machines.

Osmosis is the movement of water molecules across a semipermeable membrane from regions of low solute concentration to high solute concentration.

Osmosis is applied detoxification.

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Yellow paint has 0.511 % PbCrO4 by mass

Mass of PbCrO4 in 1 kg of paint = (0.511 / 100) * 1 kg = 0.00511 kg = 5.11 g

Moles of PbCrO4 = 5.11 g/ 323.19 g/mol

                           = 0.0158 moles

Moles of K2CrO4 also = 0.0158 moles

Moles of FeCr2O4 = 0.0158 moles K2CrO4 * (4 mole FeCr2O4 / 8 moles K2CrO4)

                            = 0.0079 moles

Mass of FeCr2O4 (chromite) = 0.0079 moles * 223.83 g/mol

                                            = 1.77 g

Paints are divided into two types: oil-based paints and water-based paints. Oil paints are usually used as a primer, undercoat, and topcoat. In the past, we relied heavily on oil-based paints for surface durability and longevity, but today water-based paints are on par. It is used for prolongation and acts as a barrier against environmental influences. Paint consists of pigments, solvents, resins, and various additives. Pigments give the paint its color. Solvents make application easier. The resin helps dry. Additives range from fillers to antifungals. There are hundreds of different natural and synthetic pigments.

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Answer:

Should be number 4, quartz.

Explanation:

Quartz is rougher than calcite, therefore it's able to scratch it.

a) Melting: An example of melting that occurs in our everyday life is when we heat butter on a stovetop.

b) Freezing: Freezing is the process in which a liquid transforms into a solid upon cooling.

c) Condensation: One example of condensation that we encounter regularly is when water droplets form on the surface of a cold drink on a hot day.

d) Evaporation: Evaporation is the process by which a liquid transforms into a gas or vapor.

e) Sublimation: Sublimation refers to the transformation of a substance directly from a solid to a gas without passing through the liquid state.

a) Melting:  Butter is a solid at room temperature, but when heat is applied, it melts into a liquid. This change is a result of the increase in temperature, which provides enough energy to overcome the intermolecular forces holding the butter molecules together.

b) Freezing:Eventually, the temperature reaches the freezing point of water (0°C or 32°F), at which the water molecules slow down and arrange themselves into a regular, crystalline structure. This transformation from a liquid to a solid state is accompanied by the release of heat energy.

c) Condensation: As the temperature decreases, the air's capacity to hold moisture decreases, causing the water vapor in the air to condense into liquid water droplets. This process occurs due to the transfer of heat energy from the warm air to the cold surface, leading to the saturation of the air and the conversion of water vapor into liquid form.

d) Evaporation:  As the sun's heat energy is absorbed by the water molecules on the clothes' surface, their kinetic energy increases, causing them to break free from the liquid phase and escape into the surrounding air as water vapor. This process occurs because the molecules at the liquid surface with sufficient energy can overcome the attractive forces within the liquid and enter the gas phase.

e) Sublimation: Sublimation refers to the transformation of a substance directly from a solid to a gas without passing through the liquid state. An example of sublimation is the process of dry ice (solid carbon dioxide) converting into carbon dioxide gas.

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Answer:

2 g/cm3

...........

Chemical degradation of soils can occur due to a variety of processes, including:

Acidification: When soils become too acidic, it can cause chemical changes that can degrade soil quality and reduce plant growth. Acidification can occur due to acid rain, overuse of chemical fertilizers, or other environmental factors.

Salinization: When soils become too salty, it can cause soil degradation and reduce plant growth. Salinization can occur due to excessive irrigation or the use of saltwater for irrigation.

Erosion: Soil erosion occurs when topsoil is removed from the surface of the soil, either by wind or water. This can lead to soil degradation and loss of nutrients.

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The compound that will not pass through filter paper when stirred in water is (1) Hg₂Cl₂. This is because Hg₂Cl₂ is insoluble in water and forms precipitate when stirred in water. This precipitate will not pass through filter paper and can be separated from solution.

Compound is a substance that is made up of two or more different elements that are chemically bonded together in a fixed proportions. The elements in a compound cannot be separated by physical means, but can only be separated by chemical reactions. Compounds have their own unique chemical and physical properties that are different from the elements that make them up.

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Approximately 24.55 cm^3 of oxalic acid must be added to sufficient water to give a 1.500 liter solution with a formal concentration of 0.300 F.

To find the volume of oxalic acid needed to make a 1.500 liter solution with a formal concentration of 0.300 F, we need to use the equation:

Formal concentration (F) = (moles of solute) / (volume of solution in liters)

First, we need to calculate the moles of oxalic acid required. The formal concentration (F) is given as 0.300, so:

0.300 = (moles of oxalic acid) / 1.500

Rearranging the equation, we find:

moles of oxalic acid = 0.300 * 1.500

moles of oxalic acid = 0.450

Next, we can calculate the mass of oxalic acid needed using its molecular mass:

mass of oxalic acid = moles of oxalic acid * molecular mass

mass of oxalic acid = 0.450 * 90.03

mass of oxalic acid = 40.5145 g

Finally, we can calculate the volume of oxalic acid needed using its density:

volume of oxalic acid = mass of oxalic acid / density

volume of oxalic acid = 40.5145 g / 1.65 g/cm^3

volume of oxalic acid = 24.55 cm^3

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