what is the mass of 25 g of co2​

Answer:

Grey school buses would likely get in more accidents because other drivers are expecting a yellow bus to make frequent stops and the lights and stop sign are noticeable on a brighter color.

Explanation:

yellow buses are easier to see in fog than a grey bus

Answer:

i think its  Hydrogen gas and oxygen gas react explosively to form water. and . Methane burns in air that contains oxygen.

Explanation: Mine was a little bit different than yours please forgive me if I'm wrong I chose answers that was similar to mine

Methane burns in air that contains oxygen and Hydrogen gas and oxygen gas react explosively to form water. These  two reactions are faster than the others.

Chemically speaking, methane has the formula CH4. The simplest alkane and the primary component of natural gas, it is a group-14 hydride. The amount of oxygen breathed from the air might be decreased by high methane levels. This may include headaches, facial flushes, slurred speech.

Unscented, colorless, and combustible, methane is a gas. It is mostly used as fuel to produce heat and light. It is also employed in the production of organic compounds. Methane is frequently found in landfills, marshes, septic tanks, sewers, and other places where natural materials decompose.

Suffocation can result from high methane concentrations in enclosed spaces because methane reduces the amount of oxygen in the air. Lack of oxygen can cause headaches, nausea, lightheadedness, and unconsciousness.

Thus, option A and D are correct.

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No, the volume of water in a beaker is not an extensive property.

Extensive properties are those that depend on the amount or size of the substance being measured. In other words, they are properties that change with the quantity of the substance. Examples of extensive properties include mass, volume, and total energy.

In the given scenario, the volume of water in the beaker is 50 milliliters. This volume remains the same regardless of the quantity of water present. Whether it's 50 milliliters or 500 milliliters, the volume measurement does not change. Therefore, the volume of water in the beaker is an example of an intensive property.

Intensive properties are independent of the amount or size of the substance. They are characteristics that remain constant regardless of the quantity of the substance. Examples of intensive properties include temperature, density, and color.

It's important to note that the distinction between extensive and intensive properties depends on the specific property being considered. While volume is typically an extensive property for a bulk substance, in the case of a fixed volume of water in a beaker, it becomes an intensive property.

In summary, the volume of water in a beaker is not an extensive property but rather an intensive property because it does not change with the quantity of the substance.

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The first location of chemical and mechanical digestion is the stomach. This statement is false.

Digestion is the breaking down of large insoluble food molecules into smaller water-soluble food molecules so that they can be absorbed into the aqueous plasma. In certain organisms, these small substances are absorbed from the small intestine into the bloodstream. Digestion is important for breaking down food into nutrients that the body uses for energy, growth, and cell repair that it needs to survive.

The digestive system has many forms. A basic distinction is made between internal and external digestion. External digestion evolved early in evolutionary history, and most fungi still rely on it. During this process, enzymes are secreted into the organism's environment, where organic substances are decomposed and some of the products diffuse back into the organism. Animals have a tube (alimentary canal) where internal digestion takes place. This is more efficient as more decomposition products can be trapped and the internal chemical environment can be more effectively controlled.

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Answer:

I think its option

D: use a scale and record the weight in N

Answer:

It's Simple earth just moves noob

Answer:

38 electrons

Explanation:

Strontium atoms have 38 electrons and the shell structure is 2.8. 18.8. 2.

Answer:

1

Explanation:

The statement in which La Niña affect the climate of the Pacific Ocean is "The cold water sinks deeper into the ocean."

La Niña is a climate phenomenon that depicts the cooling of surface ocean waters along the coast of South America's tropical west coast.

The average weather in a certain place over a longer length of time is referred to as climate.

The jet stream moves northward and weakens across the eastern Pacific as a result of La Niña. The South experiences warmer and drier weather than usual during La Nia winters. The North and Canada are wetter and colder than the rest of the country. The seas off the Pacific coast are cooler and contain more nutrients than typical during La Niña.

Water in the eastern Pacific is colder than typical because to La Niña. El Niño might cause the water to be warmer than usual in the same place. During La Niña years, drought-stricken areas are drenched, while El Niño years are drenched.

Hence the correct option is 2.

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Answer:

11.4

Explanation:

You wont fail your quiz .

If a falling rock undergoes a Δv of 112ms due to a speed of 9.8 m/s2, it will take 11.4 seconds to fall.

The speed is the rate of change of position of an object with a given time of interval or per unit time then it is known as speed and it is the ratio of distance traveled to the time taken unit is meter per second.

The speed of an object is 9.8 m/s² distance traveled is 112m/s so the time will be,

                 Speed = distance / time

Substituting the value,

                  Time = distance/ speed

                  Time = 9.8 m/s² / 112m/s

                  Time =  11.4 seconds

Therefore, it will take 11.4 seconds to fall, if a falling rock undergoes a Δv of 112ms due to a speed of 9.8 m/s².

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Answer:

Things made of thermoplastics

1) Plastic chairs

2) Plastic table

3) Plastic cups and plates

4) Nylon bags

5) Plastic cabinet

6) PVC pipes-

7) Internal electronic component such as gears

8) Vehicle dashboard

Things made of Thermosetting plastics

1) Electrical insulation

2) Handles of electrical fittings

3) Plastic hoses

4) Electric switch covering

5) Coverings of electronic gadgets

6) Silicone in adhesives

7) Keyboard

Explanation:

A plastic polymer material that becomes soft upon heating and hard once again when cooled such that the material can be repeatedly or cyclically cooled and heated numerous times with its chemical and physical properties remaining constant is known as a thermoplastic.

A plastic, polymer or resin that is hardened from its soft or liquid state by curing irreversibly such that it cannot be made soft again without a change in its chemical properties is known as a thermosetting plastic.

Li(g)→Li+(g)+e−  is the reaction that corresponds to the first ionization energy of lithium, li.

Any process in physics and chemistry whereby electrically neutral atoms or molecules are changed into electrically charged atoms or molecules (ions) by gaining or losing electrons is known as ionisation. Ionization is the process of removing charge—typically electrons—from neutral atoms in order to form positive ions, or conversely, deposition of additional charge in order to make negative ions. The most basic instances of ionisation take place in gases as a result of high voltage breakdown, such as lightning or exposure to UV or ionising radiation. The amount of energy needed to remove an electron from an isolated atom or molecule is known as ionisation energy, also known as ionisation potential, in chemistry and physics. An anion is created when an atom or molecule picks up an electron; a cation is created when they lose an electron (a cation).

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Answer:

The product will form at the same rate at which it decomposes.

Explanation:

hope it helps

Answer:   The product will form at the same rate at which it decomposes.

Explanation:    I took the test

Answer: Yes

Explanation:

Scientific theory can be defined as the solutions to the problems of the queries related to natural phenomena or it is the explanation for different aspects of the natural world. It is done with repeated testing procedure. To prove the facts of the theory, repeated experimental tests, and observations are done. The theories are tested under the controlled conditions of the experimental set up.

On the basis of the above description, we can say that the scientific investigations are done in the form of experimentation trials before proposing  a theory. The theory is tested and is not simply expected.

Answer: Yes, Clements compared ecological succession with the development of organisms. Yes, this theory was tested.

Explanation:

According to Charle's law, the volume of the given mass of a gas is directly proportional to its absolute temperature provided that the pressure is constant. Mathemically;

where;

V1 and V2 are the initial and final volume of the gas

T1 and T2 are the initial and final temperatures of the gas (in Kelvin)

Given the following parameters:

Substitute the given parameters into the formula;

Therefore the volume of the gas at 20°C is approximately 97.67cm³

Answer:

The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles KMnO4, or 158.033949 grams.

Explanation:

I belive that is correct,hope it helps:)

Answer:

The eruption of Mount Tambora eventually reduced the average global temperature by as much as 3 °C.

Explanation:

The Mount Tambora eruption was the largest and most destructive volcanic event in recorded history, expelling as much as 150 cubic km (roughly 36 cubic miles) of ash, pumice, and other rock, and aerosols—including an estimated 60 megatons of sulfur—into the atmosphere. As that material mixed with atmospheric gases, it prevented substantial amounts of sunlight from reaching Earth’s surface, eventually reducing the average global temperature by as much as 3 °C.

Answer:

A

Explanation:

You can eliminate C because you need to consult a periodic table to determine the mass (not the weight).

There are other answers you could use. The wording is awfully sloppy.  D is an example of that. The elements part is true, the atoms part is not really true in all cases.  For example NaCl is table salt and both the elements are ions, not atoms. Na is plus ion and Cl is minus one. B is wrong for the same reason.

I think in the end I would choose A.  I think this is a very sly question. It is not really testing chemistry. It is testing how well you know your definitions.

Polar covalent bonds allow hydrophilic substances to interact with water. Polar covalent bonds allow hydrophilic substances to interact with water. In a polar covalent bond, the electrons are unequally shared between the atoms, resulting in partial positive and partial negative charges.

Polar covalent bonds occur when there is an unequal sharing of electrons between atoms, resulting in a partial positive charge on one atom and a partial negative charge on another. This polarity allows polar molecules or ions, such as hydrophilic substances, to form favorable interactions with water molecules through hydrogen bonding, which occurs between the positive hydrogen atoms in water and the negative regions of the polar molecule.

The presence of polar covalent bonds in a substance enables it to be hydrophilic, meaning it has an affinity for water. This interaction is crucial in many biological processes, as water serves as a universal solvent and plays a vital role in the dissolution, transport, and reactions of hydrophilic substances. The polarity of the covalent bonds allows for the formation of hydrogen bonds with water, facilitating the solubility and interaction of hydrophilic substances in aqueous environments.

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We require the equation to understand the process that occurs when X reacts with Y to form an ionic compound.The chemical equation for the formation of the ionic compound between X and Y would be: X + Y → XYwhere X represents the alkali metal in group I and Y represents a non-metal that is most likely in group VII. This equation represents the process of how the two elements react with each other to create an ionic compound.

Element X is found in group I of the periodic table, which means it belongs to the alkali metal group. Alkali metals are well-known for their reactivity, with the exception of lithium, which is the least reactive alkali metal. Alkali metals react with other elements to form ionic compounds. Let’s take a closer look at this process.Element X reacts with Element Y to create an ionic compound, which means that Element X becomes an ion in the process. Since Element X is an alkali metal, it has only one valence electron.

To form a positive ion, it loses this valence electron.Element Y, on the other hand, is probably a non-metal since it’s reacting with an alkali metal. Non-metals, unlike alkali metals, have a high electronegativity. As a result, they have a tendency to take electrons from other elements in order to complete their valence shells.

As a result, Element Y gains an electron in this instance.Since X loses its valence electron and Y gains an electron, X becomes a positive ion and Y becomes a negative ion. The resulting ionic compound is formed by the attractive forces between the positive and negative ions. The formula of the ionic compound is determined by the ratio of the ions present.

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The major organic product obtained from the given sequence of reactions is methoxymethane (CH3OCH3), which is an ether formed through an etherification reaction between hydroxymethyl and methoxy groups in the presence of sulfuric acid catalyst.

The major organic product obtained from the given sequence of reactions can be determined by analyzing each step:

a) hoch2: This is a hydroxymethyl group.

b) ch2oh: This is a methoxy group.

c) h2so4: This is sulfuric acid, which acts as a catalyst in this reaction.

When hoch2 reacts with ch2oh in the presence of h2so4, an ether is formed. The reaction is known as an etherification reaction.

The product obtained from this sequence of reactions is an ether, specifically methoxymethane (also known as methyl methyl ether or dimethyl ether), which has the molecular formula CH3OCH3.

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The structure that best fits the given data is 1,4-dibromobenzene.

The presence of two methyl singlets in the proton NMR spectrum indicates the presence of two methyl groups in the compound. This suggests the presence of a substituent attached to the benzene ring.

The proton-decoupled 13C NMR spectrum displays six peaks, indicating the presence of six distinct carbon environments. In 1,4-dibromobenzene, there are two carbon atoms attached to the methyl groups, which gives two peaks. The benzene ring itself has four unique carbon environments, each with a different chemical shift, resulting in four additional peaks.

The structure of 1,4-dibromobenzene matches the data because it contains two methyl groups and displays a total of six peaks in the proton-decoupled 13C NMR spectrum, consistent with the given information.

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Given that the empty flask weighs 390.0 g and we want to add 2.2 g of sugar.

We want to calculate the weight we would expect to see on the balance when we're done adding the sugar. It is known that the empty flask weighs 390.0 g, and the weight of sugar to be added is 2.2 g.

The total weight of the flask and sugar would be 390.0 + 2.2 = 392.2 g. Hence, we would expect to see 392.2 g on the balance when we're done adding the sugar.

The weight of the flask can be determined by weighing the empty flask before the addition of the sugar. The sugar is then added, and the flask is weighed again to get the total weight of the flask and sugar. The difference between the total weight and the weight of the empty flask is the weight of the sugar added.

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The relationships of the bolded H's shown into each of the molecules are mentioned below:

A. OH: In this molecule, the Hydrogen bond is attached to the -OH group.B. H: In this molecule, the H bond is attached to the carbon atom.C. III H: In this molecule, the H bond is attached to the carbon atom.D. OH: In this molecule, the H bond is attached to the -OH group.

To match the relationships of the bolded Hydrogen bond's shown in each of the molecules, let's examine the given options:

A. OH H H: This indicates a hydroxyl group (OH) attached to a hydrogen (H) atom.

B. H C. Ill H I: This indicates a hydrogen (H) atom bonded to a carbon (C) atom in a tertiary (III) carbon center.

D. OH: This indicates a hydroxyl group (OH) without any attached hydrogen atoms.

Now, let's match these relationships to the molecules provided:

CH3OH: This molecule has a hydroxyl group (OH) attached to a carbon (C) atom. Therefore, the bolded H corresponds to option D. OH.

CH3CH2CH2OH: This molecule has a hydroxyl group (OH) attached to a carbon (C) atom, and it also has three hydrogen (H) atoms bonded to a tertiary (III) carbon center. Therefore, the bolded H corresponds to options A. OH H H and B. H C. Ill H I.

Hence, the matching relationships of the bolded H's in the given molecules are as follows:

CH3OH: D. OH

CH3CH2CH2OH: A. OH H H and B. H C. Ill H I

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The volume of 0.125 M nitric acid that is required to completely neutralize 25.0 mL of 0.100 M barium hydroxide is 31.25 mL.

This can be calculated using the formula:

Molarity of acid x Volume of acid = Molarity of base x Volume of base

Given:

Molarity of nitric acid = 0.125 M

Volume of nitric acid = ?

Molarity of barium hydroxide = 0.100 M

Volume of barium hydroxide = 25.0 mL = 0.025 L

Using the formula:

0.125 V = 0.100 × 0.025

V = (0.100 × 0.025) / 0.125

V = 0.020 L or 20 mL

Therefore, the volume of 0.125 M nitric acid that is required to completely neutralize 25.0 mL of 0.100 M barium hydroxide is 31.25 mL.

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Answer:

Ver explicacion

Explanation:

Cristalización y disolución de cloruro de sodio: equilibrio físico dinámico

Conversión de oxígeno gaseoso en ozono - equilibrio químico

Condensación y evaporación de un líquido - equilibrio físico dinámico

Reacción entre H2 y 12 para producir Hl - equilibrio químico

Una solución saturada de azúcar - equilibrio físico dinámico

El equilibrio alcanzado en los procesos físicos se llama procesos físicos. El equilibrio físico se llama. Ejemplos de tales procesos físicos incluyen; condensación y evaporación, cristalización y disolución, etc.

Un equilibrio dinámico ocurre en un sistema químico cuando la reacción directa y la reacción inversa se desarrollan a la misma velocidad.

Answer:

1.  Chloro(methylchloranuidyl)methane

2.   1-Chloro-3,3-dimethylbutane

3.  2-bromobutane

Answer:

copper cathodes are normally referred to when talking about copper. Cathode is the purest form of copper and is the feedstock used to produce copper wire, cable, sheet, strip, tube, etc.

Explanation:

Answer:

Sulphur

Explanation:

1s² 2s² 2p⁶ 3s² 3p⁴

So in total ya got 16 electrons

3===> defines the period

4+12===> defines the group

and boom, there ya got yaself an element called sulphur