What are the units for the ideal gas constant R when the temperature is in kelvin, the volume is in liters, and the pressure is in atmospheres? Select the correct answer below: a. L atm mol K^-1 b. L atm mol^-1 K^-1 c. L atm^-1 mol^-1 K^-1d. mol K L^-1 atm^-1

Answer:

On a periodic table, the columns of elements with similar properties are called groups

Explanation:

m=30

v=10

K.E=1/2mv^2

=1/2×30×10^2

=1/2×30×100

=1500 joule

\(^{99}_{43} \text{Tc}\)

The rates of the opposing reactions and the value of the equilibrium constant are affected when heat is added to this system AP Chemistry. As a result, increasing the temperature can increase or decrease the rate of the reaction, depending on the specifics of the reaction.

Effects on the value of the equilibrium constant When heat is added to the system of reversible chemical reactions, the value of the equilibrium constant will be affected. Le Chatelier's principle can be used to predict the direction of the change in the equilibrium constant due to a change in the concentration of the reactants or products. If a reversible reaction is endothermic, the equilibrium constant will increase as the temperature increases. If the reaction is exothermic, the equilibrium constant will decrease as the temperature increases. Effects on the rates of the opposing reactions

The forward and reverse reactions in a reversible reaction reach equilibrium when the rates of the opposing reactions become equal. The activation energy for a chemical reaction can be decreased by increasing the temperature of the system. As a result, the forward reaction rate increases, and the reverse reaction rate decreases. The overall effect of temperature on the rate of a reversible reaction depends on the activation energies of the forward and reverse reactions, as well as the concentration of the reactants.

As a result, increasing the temperature can increase or decrease the rate of the reaction, depending on the specifics of the reaction.

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Answer:

wheres the options?

Explanation:

Answer:

Speed is the time rate at which an object is moving along the path, while velocity is the rate and direction of the object's movement. put another way, speed is a scalar value while velocity is a vector value.

Explanation:

Answer:

the earth is tilted towards the sun

Explanation:

In the context, there is a sun and earth system and at a certain point when the earth is moving in its orbit around he sun, some point on the earth experiences the summers season. This is because at this point of the earths revolution, the point on the earth is facing the sun and is also tilted towards the sun. So at this point the sun rays fall directly at the surface. While the place which is tilted away from the sun, experiences winter season.

Answer:

Earth's northern hemisphere is tilted toward the Sun.

Answer: B 0.6M

Explanation:

Answer:

0.987 g/ml

Explanation:

The formula for density is mass/ volume.

Substituting our values in we get density = 3.75/ 3.8 = 0.9868g/ml.

Hope this helps! Let me know if you have any questions :)

The metals in the center of the periodic table are called transition metals. There are 38 transition metals in total.

Answer:

They are called transition metals.

The atomic mass of an element can help you predict the mode(s) of decay for radioactive nuclides, such as electron capture, by providing insight into the stability of the nucleus and the proton-to-neutron ratio.

In order to predict the mode(s) of decay of radioactive nuclides, we need to consider the atomic mass and the stability of the nucleus.

One mode of decay is electron capture, which occurs when a proton-rich nucleus captures an electron from its inner shell. This process transforms a proton into a neutron and releases a neutrino.

The atomic mass of the element (A) plays a significant role in determining the stability of the nucleus. If the nucleus has too many protons compared to neutrons, it may undergo electron capture to achieve a more stable configuration. In this process, the atomic mass remains the same, but the atomic number decreases by one.

To predict the mode(s) of decay for a specific radioactive nuclide, we need to compare its current proton-to-neutron ratio with that of stable isotopes of the same element. If the nuclide has a higher proton-to-neutron ratio than stable isotopes, it's more likely to undergo electron capture.

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Answer:

\(\huge\boxed{\sf V_2 = 5.68 \ L}\)

Explanation:

Volume 1 = \(V_1\) = 3.95 L

Temperature 1 = \(T_1\) = -45 °C + 273 =  228 K

Temperature 2 = \(T_2\) = 55 °C + 273 = 328 K

Volume 2 = \(V_2\) = ?

\(\displaystyle \frac{V_1}{T_1} = \frac{V_2}{T_2}\) (Charles law)

Put the given data in the formula.

\(\displaystyle \frac{3.95}{228} = \frac{V_2}{328} \\\\Cross \ Multiply\\\\3.95 \times 328 = V_2 \times 228\\\\1295.6 = V_2 \times 228\\\\Divide \ both \ sides \ by \ 228\\\\1296.5/228 = V_2\\\\5.68 \ L = V_2\\\\V_2 = 5.68 \ L\\\\\rule[225]{225}{2}\)

Answer: The stage of metamorphosis this occurs is called the PUPA stage. The correct option is D.

Explanation:

Metamorphosis can be defined as the change in form, mode of life and behaviour that occurs during embryonic development of an organism. In the metamorphosis of insects, which mostly reproduce sexually, insects can be grouped according to the way the eggs develop into adults. Some show:

--> Complete metamorphosis or

--> Incomplete metamorphosis.

In the life cycle of a butterfly, a COMPLETE metamorphosis occurs. This is because after fertilization, the EGG hatches into LARVA which passes through a PUPAL stage before becoming transformed into an ADULT insect. That is:

Egg --> Larva --> Pupa --> Imago.

When the caterpillar, which is the Larva stage, has reached its full size, it spins a pad of silk on a twig. It moves upward and attached it's clasper to this pad. It spin another silk thread at the thorax. These aids it to assume a slanting position with the head end pointing upwards. The pupa stage called the CHRYSALIS is reached when it tucks it's head under its thorax, arches it's body, shortens and broadens, and moults for the last time. Therefore the correct option is D (pupa).

Answer:

The answer is D. Pupa

Answer:

Conveniently enough, bonds between ions are called ionic bonds. These bonds are formed when an electron of one atom is either donated or taken by another atom. When an atom donates an electron, it gains a positive charge. The atom accepting the electron gains a negative charge.

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☁️ Answer ☁️

If an atom gives away an electron, it becomes..... positive

If an atom loses or gains electrons, it becomes ionized, or charged

Hope it helps.

Have a nice day noona/hyung!~ ￣▽￣❤️

The Le Chatelier principle explains how an equilibrium changes when its conditions change. For variations in concentrations, temperature, or pressure, the shift's direction can be predicted. Although catalysts speed up the process of reactions reaching equilibrium, they do not change the location of an equilibrium.

The equilibrium will change to create more products if the concentration of the reactants (quantity of reactants) rises (product-favored). The reaction will change to produce additional reactants as the number of products rises (reactant-favored). Reactants benefit from a decrease in reactants. Products benefit from decreasing product. A system may gain temperature from the environment or as a result of a chemical interaction. The equilibrium moves to the right as the temperature drops (products). In other words, the system favors the reaction that produces heat to make up for the drop in temperature.

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The bag contains 56 marbles. (35 yellow marbles can be expressed in the ratio as 5 yellow marbles for every 8 orange marbles.)

If a bag contains 35 yellow marbles, we can determine the total number of marbles in the bag using the given ratio. According to the ratio provided, for every 5 yellow marbles, there are 8 orange marbles. We can set up a proportion to find the total number of marbles in the bag.

Let x be the total number of marbles in the bag. The proportion can be written as: 5 yellow marbles / 8 orange marbles = 35 yellow marbles / x

Cross-multiplying, we get: 5x = 35 * 8

5x = 280

Dividing both sides by 5, we find: x = 56

Therefore, the bag contains 56 marbles.

According to the given ratio of 5 yellow marbles for every 8 orange marbles, we can set up a proportion to find the total number of marbles in the bag. By cross-multiplying, we find that 5 times the total number of marbles is equal to 35 times 8. Simplifying the equation, we get 5x = 280. Dividing both sides of the equation by 5, we find that the total number of marbles in the bag, represented by x, is equal to 56. Therefore, the bag contains 56 marbles in total. The given information of having 35 yellow marbles helps us determine the overall quantity of marbles in the bag using the provided ratio.

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Answer:

Skeleton equation: H2S(g) + O2(g) → SO2(g) + H2O(l)

Explanation:

Marble is not used as a material in decorative fixtures because it is easily corroded by acidic substances. The most common fixture style of drinking fountain and water cooler is wall-mounted.

1. Marble is a naturally occurring stone that is formed from limestone under high pressure and temperature. It is known for its beautiful veining, durability, and strength. Marble is commonly used in construction, such as for flooring, countertops, and statues.

However, marble is not used as a material in decorative fixtures because it is easily corroded by acidic substances, such as vinegar or lemon juice. This can cause the marble to etch, dull, or discolor, which can ruin the beauty of the decorative fixture. Therefore, other materials, such as ceramic, porcelain, or glass, are used instead.

2. Drinking fountains and water coolers are commonly found in public places, such as schools, parks, and offices. They provide a convenient and hygienic way for people to drink water. There are several styles of drinking fountains and water coolers, but the most common style is wall-mounted.

This style is attached to the wall and is usually connected to a water supply and drain. Wall-mounted drinking fountains and water coolers are easy to install, maintain, and clean, making them a popular choice for public areas.

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While structural isomers share the same molecular formula, their atoms are bonded differently. Stereoisomers share the same atomic configurations and chemical formulae. Thus, option A is correct.

The term "structural isomer," also known as a "constitutional isomer," refers to a group of two or more organic compounds that share the same chemical formula but have different structures.

Isomers are compounds that share the same molecular formula but differ in the way their atoms or groupings are arranged or oriented.  Only the groups' spatial orientation within the molecule distinguishes them from one another.

The location of the methyl group varies between the two molecules below, despite having the same chemical formula.

Therefore, regioselective is the term that correctly describes a chemical reaction that favours one possible structural isomer over one or more other structural isomers.

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Answer:

The energy released is 13.53j

Explanation:

Q = Mc∆temp.

Q = energy

M = mass

c = specific heat capacity

∆temp. = change in temperature

Q = 1 x 0.902 x (35 - 20)

Q = 0.902 x 15 = 13.53j

Aluminum has a specific heat capacity of 0.902 J/g °C, the amount of energy that is released when 1.0 kg of aluminum cools from 35°C to 20°C is 13,530 J.

The amount of heat that is released during any reaction will be calculated as:

Q = mcΔT, where

m = mass of aluminum = 1kg = 1000g

c = specific heat of aluminum = 0.902 J/g.°C

ΔT = change in temperature = 35 - 20 = 15 °C

On putting values we get

Q = 1000 × 0.902 × 15 = 13,530 J

Hence released heat is 13,530 J.

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Answer:

Ca2+ represents an ion with 20 protons and 18 electrons.

Explanation:

A calcium atom has 20 protons and 20 electrons. The 2+ charge next to the symbol indicates a loss of two electrons: 20-2=18.

Answer: A 1000 times more

Explanation:

there are 1000 micro grams in 1 milligram.

If you were given a dose of 500 mg instead of 500 µg of a drug, you received 1000 times more of the drug.

If you were given a dose of 500 mg instead of 500 µg, you received 1000 times more of the drug. This is because 1 mg is equal to 1000 µg, so 500 mg is 500,000 µg. Therefore, you received 1000 times more of the drug than the intended dose.

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Answer:92.1g

Explanation:

This means that the reaction consumed4.004moles NaCl⋅2 moles Na2moles NaCl=4.004 moles NaConvert this to grams by using the element's molar mass4.004moles Na⋅22.99 g1mole Na=92.1 g

Answer:

A compound is a material formed by chemically bonding two or more chemical elements.

Explanation:

Answer

The theoretical Van't Hoff factor i for C12H22O11 is 1

Explanation

The Van't Hoff factor, i, is the number of particles formed in a solution from one formula unit of solute.

The Van't Hoff factor, i, is a property of the solute. In an ideal solution, i does not depend on the concentration of the solution.

For a nonelectrolyte, like (C12H22O11), which does not separate into ions in solution, Van''t Hoff factor, i = 1 because 1 molecule of sucrose (C12H22O11) forms only one particle in solution.f

solids are similar to liquids in that both are condensed states, with particles that are far closer together than those of a gas. However, while liquids are fluid, solids are not. The particles of most solids are packed tightly together in an orderly arrangement. The motion of individual atoms, ions, or molecules in a solid is restricted to vibrational motion about a fixed point. Solids are almost completely incompressible and are the densest of the three states of matter.

The given question represent the alpha decay of lawrencium, which is as follows: ²⁵⁶Lr₁₀₃ ⇒ ²⁵²Md₁₀₁ + ⁴He₂.

Alpha decay is a nuclear decay process in which an unstable nucleus changes into another element by emitting a particle of two protons and two neutrons. This emitted particle is known as an alpha particle and is simply a helium nucleus. Alpha particles usually have a relatively large mass and positive charge. This large mass means that alpha particles cannot travel very far in the air or penetrate solids very deeply. Alpha decay is rarely used in external medical radiotherapy because alpha particles act only on surfaces.

Alpha decay was firstly distinguished from other forms of radiation by Ernest Rutherford by observing the deflection of radiation due to magnetic fields. Alpha particles have a charge of +2e, so alpha decay is deflected, as would be expected of a positive particle.

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The required number of moles of C that must fully react to produce 2. 0 moles of \(C_{2} xH_{6}\) is  2.

The balanced equation for the reaction of carbon (C) and hydrogen (H2) to produce ethane (C2H6) is:

C + 2H2 -> C2H6

From the balanced equation, we can see that for every 1 mole of carbon that reacts, 2 moles of hydrogen are also required. Therefore, in order to produce 2 moles of C2H6, we need 2 moles of hydrogen.

Since the balanced equation states that for every 1 mole of C we need 2 moles of H2, we can say that we need 2*2 =4 moles of hydrogen.

So the number of moles of C that must completely react to produce 2.0 moles of C2H6 is 2 moles.

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