A 500.0 g block of dry ice (solid CO2, molar mass = 44.0 g) vaporizes to a gas at
room temperature. Calculate the volume of gas produced at 25.0 °C and 1.75
atm.

Show your work

The temperature is always the same.

Temperature vs. time graphs help show how phase changes occur over time.

Temperature During Changes of State

To understand how temperature changes during phase changes, we need to understand what a phase change is. A phase change occurs when the state of matter changes. For example, changing from a solid to a liquid. When a phase change occurs, the intermolecular forces that hold the molecules together are broken. This takes energy. So, if the state of matter is being changed, all of the new energy goes to breaking the forces, not increasing temperature. Thus, the temperature never changes during a phase change.

Reading the Graph

We don't need to know the information above in order to answer this question. Instead, we can simply read the graph. The points 2 and 4 represent the changes in state of matter. We know that there are 3 states of matter that occur in the same order. Solids are the coldest, then liquids, then gases are the hottest. So, 1, 3, and 5 are those states of matter respectively. Thus, the regions 2 and 4 in between these states of matter must be the phase changes.

Both 2 and 4 are horizontal lines. This means that the temperature is not changing at these points. So, we know that temperature does not change during a phase change.  

The way the temperature changes at the end is always higher than how it changes at the beginning. Option D

A change of state refers to the transformation or conversion of matter from one physical state to another. Matter can exist in three primary states: solid, liquid, and gas. The change of state occurs when there is a transition between these states, typically as a result of altering temperature or pressure.

Since the molecules acquire energy in the process and they move faster, the way the temperature changes at the end is always higher than how it changes at the beginning.

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Answer:

That is, the molar mass of a substance is the mass (in grams per mole) of 6.022 × 10 23 atoms, molecules, or formula units of that substance. In each case, the number of grams in 1 mol is the same as the number of atomic mass units that describe the atomic mass, the molecular mass, or the formula mass, respectively.

Answer:

The molar mass of a substance is the mass (in grams per mole) of 6.022 x \(10^{23}\) atoms, molecules, or formula units of that substance.

Explanation:

In each case, the number of grams in 1 mol is the same as the number of atomic mass units that describe the atomic mass, the molecular mass, or the formula mass, respectively.

Answer:

we cant see the list

Explanation:

The answer with the correct number of significant figures for the given calculation is option c) 11.56.

The answer with the correct number of significant figures for the given calculation is option c) 11.56. To determine the number of significant figures in the answer, we need to consider the numbers used in the calculation and their respective significant figures. The numbers 5.6987 and 3.423 have 5 significant figures each, and the number 0.789 has 3 significant figures. When we add 5.6987 and 3.423, we get 9.1217. This number has 5 significant figures because it is the result of addition and the answer cannot have more decimal places than the number with the least decimal places. Dividing 9.1217 by 0.789 gives us 11.561038. However, we must round the answer to the least precise number used in the calculation, which is 0.789, and it has 3 significant figures. Therefore, the correct answer is 11.56, with two significant figures.

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Answer:

A. They are nonreactive gases

a) bubble chamber.A bubble chamber is a device that allows scientists to observe the motion and interactions of charged particles as they travel through a superheated liquid, like liquid hydrogen. The bending of particle trails occurs due to the influence of a magnetic field, which helps researchers identify the properties of the particles.

A bubble chamber is a tool used in particle physics to watch how subatomic particles behave. A superheated liquid, usually liquid hydrogen or helium, is contained in a container. Bubbles are left behind by particles as they move through the liquid; these bubble trails can be captured on camera and investigated. The charge and mass of the particles can be determined from the bending of these particle trails in the presence of a magnetic field.

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The hybridization for the [F]^- ion is sp^3.

In the [F]^- ion, the fluorine atom has gained an extra electron, resulting in a negatively charged ion. To determine the hybridization, we look at the electron configuration around the central atom, which is fluorine in this case.

Fluorine has the electron configuration 1s^2 2s^2 2p^5. Since the [F]^- ion has gained one electron, the new electron configuration becomes 1s^2 2s^2 2p^6.

To determine the hybridization, we count the number of electron groups around the central atom. In the case of the [F]^- ion, there is one electron group, consisting of the lone pair of electrons on fluorine. The lone pair occupies one orbital.

Since there is only one electron group, the hybridization is sp^3, which means that the lone pair is located in an sp^3 hybrid orbital.

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Correct option is C

Latent heat of vaporization is the amount of heat required to bring about the phase transition from liquid to gaseous state, at its boiling point.

The substance is Propane :

10140000 J of heat is used to boil 28.47 kg at 298 K. Here, the important thing is, the liquid is changing to vapor and the temperature is not changing means it's a phase change. So, the formula used for this is:

                        q=m× Δ\(H_{vap}\)

where, q is the heat energy, m is mass and  Δ\(H_{vapour}\)  is the enthalpy of vaporization.

Let's rearrange the formula for  as:

Given mass of the liquid = 28.47kg

Heat required to boil the liquid = 10.14 ×\(10^{2} J\)

Let's plug in the values: \(\frac{10.14*10^{2}J }{28.47Kg} =356164\frac{J}{Kg}\)

Rounding off 356164 will turn into 356000 J\(Kg^{-1}\)

Hence, the right choice is C. propane 356000 j\(Kg^{-1}\)

What is latent heat ?

Latent heat, energy absorbed or released by a substance during a change in its physical state (phase) that occurs without changing its temperature.

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Answer:

A

Explanation:

That one doesn't fall in the category of carbon cycle. It has nothing to do with natural causes since it is a man made thing. Industrial activities is not a natural cause.

Answer:

Converting between matter

Explanation:

Chemical reactions can be the decomposition or synthesis of matter.

Explanation:

Hydrogen is a very special element of the periodic table and doesn't belong to any family. While hydrogen sits in Group I, it is NOT an alkali metal.

Answer:

mesosphere

Explanation:

Answer:

The barycenter is the point in space around which two objects orbit. For the Moon and Earth, that point is about 1000 miles (1700 km) beneath your feet, or about three-quarters of the way from the Earth's center to its surface.

Explanation:

Answer:

Geologists agree that Devils Tower began as magma, or molten rock buried beneath the Earth’s surface. What they cannot agree upon are the processes by which the magma cooled to form the Tower, or its relationship to the surrounding geology of the area. Numerous theories have been suggested to explain how Devils Tower formed. Geologists Carpenter and Russell studied Devils Tower in the late 1800s and concluded that the Tower was formed by an igneous intrusion (the forcible entry of magma through other rock layers). Later geologists searched for more detailed explanations.

The simplest explanation is that Devils Tower is a stock—a small intrusive body formed by magma which cooled underground and was later exposed by erosion (Figure 1). In 1907, scientists Darton and O’Hara decided that Devils Tower must be an eroded remnant of a laccolith. A laccolith is a large, mushroom-shaped mass of igneous rock which intrudes between the layers of sedimentary rocks but does not reach the surface. This produces a rounded bulge in the sedimentary layers above the intrusion (Figure 2). This idea was quite popular in the early 1900s when numerous studies were done on a number of laccoliths in the American southwest.

Other ideas have suggested that Devils Tower is a volcanic plug or that it is the neck of an extinct volcano (Figure 3). The limited evidence of volcanic activity (volcanic ash, lava fows, or volcanic debris) in the area creates doubt that the Tower was part of a volcanic system. It is possible that this material may simply have eroded away. In 2015, geologist Prokop Závada and his colleagues proposed their own hypothesis for the formation of the Tower. They compared it to a similar butte formation in the Czech Republic. Their hypothesis suggests that the Tower is the result of a maar-diatreme volcano (Figure 4). These form when magma encounters groundwater beneath the Earth’s surface. The super-heated water becomes steam. This steam expands explosively creating a crater on the surface. The crater fills with lava which cools and solidifes into a dome structure. Erosion wears away portions of the dome to create the Tower as we see it today.

The concept of erosion exposing the Tower is common to all of its modern formation theories. Ironically, the erosion which exposed the Tower also erased the evidence needed to determine which theory of Devils Tower’s formation is the correct one.

Explanation:

Oxyfuel gas process is the most popular method used to cut metals. It involves burning oxygen and gas to melt the metal. The molten metal is then blown away by the compressed gas, resulting in a clean cut. The process is used on metals such as mild steel, cast iron, and wrought iron, to name a few.

Mild steel is the most popular type of metal cut with oxyfuel gas processes. The reason behind this is that it is the least expensive, making it perfect for low-cost jobs. The metal is also easy to weld, making it the go-to material for a wide range of construction applications. Cast iron is another type of metal that is commonly cut using oxyfuel gas processes. It is widely used in engine blocks, pipe fittings, and hydraulic equipment.

Finally, wrought iron is another type of metal that is commonly cut using oxyfuel gas processes. This metal is widely used in fences, gates, railings, and other ornamental structures. In conclusion, the oxyfuel gas process can cut a wide range of metals such as mild steel, cast iron, and wrought iron.

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Answer:

1.- Chemical change

2.- Because the atoms in the image are tranformed into a new molecule

3.- Yes, it does

4.- Due to the amount of atoms are the same both in products and reagents

Explanation:

Answer:

1.- Chemical change

2.- Yes it does ,because the atoms in the image are transformed into a new molecule

3.- Yes, it does because energy is not being created or destroyed

4.- Due to the amount of atoms are the same both in products and reagents

Answer:

2 Hydrogen atoms and 1 Oxygen atoms makes water

Explanation:

Hope this helps^^

Answer: Its chemical formula H2O, indicates that each of its molecules contains one oxygen and two hydrogen atoms,

Explanation: i hopes it helps :)

The Coase theorem is an economic concept that suggests that, under certain conditions, private parties can efficiently resolve externalities through bargaining without the need for government intervention. It was developed by economist Ronald Coase.

First, property rights must be well defined, allowing individuals to negotiate and make agreements.

Second, transaction costs, such as the costs of gathering information and enforcing agreements, should be low.

Overall, the Coase theorem highlights the potential for private bargaining to efficiently resolve externalities when certain conditions are met.

It emphasizes the importance of well-defined property rights and low transaction costs in facilitating voluntary agreements between parties.

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Answer:

neon-22

Explanation:

i got it right..have a great day.Jesus loves you<3

The isotope produced from the beta plus decay of sodium-22 is neon 22.

Isotopes are two or more types of atoms that have the same atomic number and position in the periodic table but differ in nucleon numbers because their nuclei have different numbers of neutrons.

Carbon 12 and Carbon 14 are both carbon isotopes, one with 6 neutrons and the other with 8 neutrons (both with 6 protons). Carbon-12 is an isotope that is stable, whereas carbon-14 is a radioactive isotope (radioisotope). Uranium-235 and uranium-238 are naturally occurring elements in the Earth's crust. Both have extremely long half-lives.

Different elements exist when two atoms have different numbers of protons. If two atoms have the same number of protons but different numbers of neutrons, they are referred to as isotopes. We use two terms to identify nuclides.

Thus,The isotope produced from the beta plus decay of sodium-22 is neon 22.

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It can be inferred that due to the relatively slight difference in electronegativity between carbon and hydrogen, and because of its symmetrical tetrahedral shape, methane CH4 is a nonpolar molecule.

Methane is a colorless, odorless gas that occurs naturally in large quantities and is also a byproduct of some human activities. Methane is the most basic hydrocarbon in the paraffin family and one of the most potent greenhouse gases. It has the molecular formula CH4.

Methane is the second most prevalent anthropogenic GHG after CO2, accounting for approximately 20% of world emissions. Compared to carbon dioxide, methane traps heat in the atmosphere 25 times more effectively.

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The rate of change of Cl2, represented as d[Cl2]/dt, is given as -0.0425 M/s. To determine the rate of change of NO, we can use the stoichiometry of the balanced chemical equation 2NO(g) + Cl2(g) -> 2NOCl(g).

According to the stoichiometry, the ratio of the rate of change of Cl2 to the rate of change of NO is 1:2. This means that for every one mole of Cl2 consumed, two moles of NO are consumed or produced. Therefore, the rate of change of NO, d[NO]/dt, can be calculated by multiplying the rate of change of Cl2 by the stoichiometric coefficient ratio:

d[NO]/dt = 2 * d[Cl2]/dt

= 2 * (-0.0425 M/s)

= -0.085 M/s

Therefore, the rate of change of NO is -0.085 M/s.

Based on the given rate of change of Cl2, the rate of change of NO in the reaction 2NO(g) + Cl2(g) -> 2NOCl(g) is -0.085 M/s. This means that for every second, the concentration of NO decreases by 0.085 M. The negative sign indicates a decrease in concentration, as expected since Cl2 is being consumed in the reaction. The stoichiometry of the balanced equation allowed us to determine the ratio between the rate of change of Cl2 and NO, and by applying this ratio, we obtained the rate of change of NO.

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The volume of stomach acid containing 0.00025 g of HCl is 6.85 µL.

This is calculated by dividing 0.00025 g by the concentration of HCl (0.10 M).

The concentration of stomach acid, HCl = 0.10 M

The mass of HCl = 0.00025 g

To find: Volume of stomach acid contains 0.00025 g of HCl.

Solution: We know,

Molarity (M) = (moles of solute) / (volume of solution in liters)

The molar mass of HCl = (1 × atomic mass of H) + (1 × atomic mass of Cl)= (1 × 1.01) + (1 × 35.5)= 36.51 g/mol

Given, Molarity (M) = 0.10 M

From the Molarity formula, we can detect

Number of moles of HCl = Molarity (M) × volume (V)

moles of HCl = 0.00025 g / 36.51 g/mol = 0.10 M × V

0.10 V = (0.00025 / 36.51) g / mol

V = (0.00025 / 36.51) g / (0.10 mol/L)

V = 6.85 × 10^-6 L = 6.85 µL

Thus, the volume of stomach acid that contains 0.00025 g of HCl is 6.85 µL.

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A and B are correct. Crubbers are expensive flue gas desulfurization devices used to remove 90% or more of SO2 pollution from industrial emissions.

Crubbers are indeed flue gas desulfurization devices used as pollution control equipment to remove SO2 (sulfur dioxide) from industrial exhaust gases. They are designed to reduce SO2 emissions to levels that are 90 percent or more below baseline levels. The term "baseline levels" refers to the initial levels of SO2 emissions before the implementation of the flue gas desulfurization system.

Crubbers, or flue gas desulfurization systems, work by utilizing various chemical processes to react with and remove sulfur dioxide from the flue gas. This helps mitigate the harmful effects of SO2 emissions on the environment and human health. However, it's important to note that while rubbers are effective in reducing SO2 pollution, they can be expensive equipment to install and maintain due to their complex design and operation. Therefore, both options A and B, which state that clubbers are flue gas desulfurization devices and expensive equipment, are correct.

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Answer:

They have different DNA and different physical appearance

Explanation:

Because if the sperms fertilize two different eggs the DNA will be different too and if the sperms are different the physical appearance will be different also

Answer:

37%+24%+23%=84% , i wish my answer is correct

The original size of the carbon-14 sample was 560 grams if the sample of carbon-14 has been decaying for 22,920 years and it is now 35. 0 grams.

The given data is as follows:

Material given = carbon -14

Time period = 22,,920 years

weight = 35 grams

To calculate the original sample size, we need to use the formula,

N = M (1/2)^(t/T)

35.0 g = M (1/2)^(22,920/5730)

35.0 g = M (1/2)^4

35.0 g = M (1/16)

For simplification, we need to multiply both sides by 16 to balance the value on the right side.

M = 16 * 35.0g

M = 560g

Therefore, we can conclude that the original size of the carbon-14 sample was 560 grams.

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Intrinsic semiconductors like silicon have a bandgap, which is the energy difference between the valence band (where electrons are bound) and the conduction band (where electrons are free to move and conduct electricity).

At absolute zero temperature (0 K), all electrons are in the valence band. As the temperature increases, some electrons acquire enough thermal energy to jump across the bandgap and occupy the conduction band. The number of electrons in the conduction band depends on the energy distribution of electrons, described by the Fermi-Dirac distribution function. For silicon at room temperature (300 K), which has a bandgap of approximately 1.12 eV, most electrons remain in the valence band since only a small fraction possesses sufficient thermal energy to reach the conduction band. The Fermi energy (E_F), which represents the energy level where there is a 50% probability of finding an electron occupied, is located close to the valence band energy level. Consequently, the number of electrons in the conduction band for silicon at 300 K is relatively low. While not exactly zero, it is considered negligible for practical purposes. The vast majority of electrons still reside in the valence band. Therefore, the conduction band of silicon at this temperature contains only a small fraction of the total number of electrons in the material.

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Answer: option c) the strongest base in aqueous solution is NaOH

Explanation:

the strongest base in aqueous solution is NaOH because strength of a base is determined by its ability to donate hydroxide ions (OH-) in solution. and NaOH dissociates completely in water to produce Na+ and OH- ions. The presence of a fully dissociated hydroxide ion makes NaOH a strong base.

While, HOC2H4OH and CH3OH are weak acids. HOC2H4OH is ethylene glycol and CH3OH is methanol are weak acid due to the presence of the   (-OH) group.

Also, NH3 (ammonia), is a weak base though it can accept H⁺ to form NH4+