Question 3 of 10
How would one make a 2 M solution of a compound?
A. By dissolving 2 moles of the compound in 1 L of water
B. By dissolving 1 molar mass of the compound in 2 L of water
C. By dissolving 1 mole of the compound in 2 L of water
D. By dissolving 2 g of the compound in 1 L of water

Answers

Answer 1
The correct answer is A

Related Questions

what amount of carbon dioxide (in moles) is produced by the reaction of 3.00 mol c4h10 with 24.0 mol o2? 2 c4h10(g) 13 o2(g)8 co2(g) 10 h2o(g)

Answers

The amount of carbon dioxide (in moles) is produced by the reaction of 3.00 mol c4h10 with 24.0 mol o2 is 12.0 moles.

When C4H10 and O2 burn, the chemical equation for the reaction is as follows:

8 CO2 + 10 H2O = 2 C4H10 + 13 O2

According to the chemical equation, 2 moles of C4H10 react with 13 moles of oxygen to create 8 moles of carbon dioxide. The mole ratio of C4H10 to CO2 is therefore 2:8, or 1:4.

Assuming that 3.00 moles of C4H10 react with 24.0 moles of oxygen, finding the limiting reactant will allow us to compute the amount of CO2 that is generated.

To do this, we can contrast the amount of oxygen needed by the reaction (13 moles of oxygen for every 2 moles of C4H10) with the actual amount of oxygen available (24.0 moles). 2 moles of C4H10 must react with 13 moles of O2: C4H10 is the limiting reactant because we only have 3.00 moles of it, which is less than the required 3.69 moles.

24.0 moles O2 x (2 moles C4H10 / 13 moles O2) = 3.69 moles C4H10

We may determine the quantity of CO2 produced using the balanced equation's mole ratio of C4H10 to CO2 (1:4):

8 mol CO2 divided by 2 mol C4H10 times 3 mol C4H10 equals 12.0 mol CO2.

12.0 moles of CO2 are consequently created throughout the process.

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in the bohr model of the hydrogen atom, an electron in the lowest energy state follows a circular path 5.29 x 10-11 m from the proton. (a) show that the speed of the electron is 2.19 x 106 m/s. (b) what is the effective current associated with this orbiting electron?

Answers

(a) By using the formula [tex]K = 0.5 * m * v2[/tex] to determine an object's kinetic energy, we can determine the electron's speed in the hydrogen atom's lowest energy state. This results in an effective current of [tex]3.52 x 10-13 A[/tex] for this orbiting electron.

An electron's rate of motion through space is referred to as its speed. It is used to determine how fast something is moving and is normally stated in metres per second (m/s). A multitude of variables, including an electron's energy, mass, and exposure to electric and magnetic fields, can have a significant impact on how fast an electron moves. Electrons can move at rates that range from less than a metre per second to almost the speed of light in the setting of atomic and molecular physics. When free electrons are present in a substance, such as a metal, they can occasionally flow through it at extremely fast speeds, which increases the material's electrical conductivity.

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To maintain beer quality it is important to maintain consistent calcium and pH levels.True or Fse

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It is true that in order to maintain beer quality it is important to maintain consistent calcium and pH levels.

Calcium is one of the most important element for yeast health and contributes to the beer's flavor and texture.

Generally pH affects yeast activity and can impact the stability and flavor of the beer. If the levels of calcium and pH fluctuate too much, it may lead to issues with fermentation and negatively affect the quality of the beer.

Maintaining consistent levels of calcium and pH in beer usually can impact the clarity and stability of the final product.

Hence, consistent levels of calcium and pH are crucial in maintaining the quality of beer.

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cone balanced on its small end is in stable equilibrium. negative equilibrium. unstable equilibrium. neutral equilibrium. positive equilibrium.

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A balanced cone on its small end is in inconsistent equilibrium. Equilibrium refers to a state of balance where an object isn't accelerating or changing its stir.

An object can be in one of three types of equilibrium stable, neutral, or unstable. In stable equilibrium, an object that's displaced from its position will witness a restoring force that brings it back to its original position. For illustration, a ball at the bottom of a coliseum is in stable equilibrium because if it's displaced from its position, graveness will beget it to roll back to the bottom of the coliseum. In neutral equilibrium, an object that's displaced from its position will remain in its new position. For illustration, a ball balanced at the top of a hill is in neutral equilibrium because if it's displaced from its position, it'll remain at its new position and not roll back to the top of the hill. In unstable equilibrium, an object that's displaced from its position will witness a force that will move it further down from its original position. For illustration, a cone balanced on its small end is in unstable equilibrium because if it's displaced from its position, it'll fall over and move further down from its original position. thus, a cone balanced on its small end is in unstable equilibrium.

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A cone balanced on its small end is in stable equilibrium. In stable equilibrium, an object is in a balanced state where any slight disturbance will cause the object to return to its original position.

This is because the center of gravity of the cone is located directly above its base, creating a low center of gravity.

To understand this concept, imagine a cone standing on its small end. The base of the cone provides a wide and stable support. The center of gravity, which is the point where the weight of the cone is concentrated, is located directly above the base. This means that any slight tilt or disturbance to the cone will result in the center of gravity moving to a lower position, causing the cone to return to its original upright position.

In contrast, if the cone were balanced on its large end, it would be in an unstable equilibrium. In this case, the center of gravity is located above the narrow top of the cone, making it easy for the cone to topple over with even a slight disturbance. This is because the center of gravity is higher than the base, making the cone top-heavy.

Therefore, a cone balanced on its small end is an example of stable equilibrium.

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what gas is formed as a result of the sodium bicarbonate wash? write a balanced equation accounting for the formation of this gas,

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The correct answer is Carbon Dioxide is formed as a result of the sodium bicarbonate wash.

Each of the molecules of carbon dioxide, with the chemical formula CO2, has one carbon atom covalently doubly bonded to two oxygen atoms. It occurs in the gas state at room temperature. Carbon dioxide acts as a greenhouse gas in the atmosphere because it absorbs infrared light rays despite being transparent to visible light. From pre-industrial levels of 280 parts per million (ppm) to a trace gas of 421 ppm, or nearly 0.04% by volume, it has grown (as of May 2022). [9] [10] The combustion of fossil fuels is the primary cause of both these high CO2 concentrations and climate change. Dissolved carbon dioxide is present in the ocean, ice caps, lakes, and groundwater.

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assuming all of these molecules have the same number of carbon atoms, which functional group would have the highest boiling point?

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The correct answer is

Aldehyde would have the highest boiling point

Aldehydes and ketone both include a carbonyl group. Aldehydes are thought to be the most important functional group. They go by the labels formyl or methanoyl group. Aldehydes get their name from the dehydration of alcohols. Aldehydes have a carbonyl group attached to at least one hydrogen atom. In ketones, the carbonyl group is joined to two carbon atoms.

Examples of organic compounds with the carbonyl functional group, or C=O, include aldehydes and ketones. The carbon atom of this group has two empty bonds that may be filled with hydrogen, an alkyl group, or an aryl group. If at least one of these substituents is hydrogen, the compound is an aldehyde. If none of these contains hydrogen, the material is a ketone.

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what is the difference between a saturated hydrocarbon and an unsaturated hydrocarbon?

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Saturated hydrocarbons and unsaturated hydrocarbons are two types of organic compounds that differ in the number and arrangement of their carbon-carbon bonds.

Saturated hydrocarbons, also known as alkanes, contain only single bonds between the carbon atoms in their molecular structure. They are said to be "saturated" because they contain the maximum number of hydrogen atoms that can be bonded to the carbon atoms. As a result, they have a linear or branched chain structure, and they are solid or semi-solid at room temperature. Examples of saturated hydrocarbons include methane (CH4), ethane (C2H6), and propane (C3H8).Unsaturated hydrocarbons, on the other hand, contain one or more double or triple bonds between their carbon atoms. This means that they have fewer hydrogen atoms bonded to their carbon atoms than is possible in a saturated hydrocarbon.

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what happens to the stereochemistry of a chiral alcohol when converted to an alkyl bromide with pbr3?

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The alcohol is converted into a good leaving group during the "activation" step by forming an O-P bond and displacing Br from P [note that this is essentially nucleophilic substitution at phosphorus].

With phosphorus tribromide (PBr3) or thionyl chloride, alcohols can be converted into alkyl halides (SOCl2).
The reaction with PBr3 involves a configuration inversion at carbon.
The reaction with SOCl2 also occurs with configuration inversion [but check with your instructor to see if the SNi mechanism is covered].
Because it avoids the possibility of carbocation rearrangements, using PBr3 and SOCl2 to convert alcohols to alkyl halides is much more mild and predictable than using HBr or HCl.
PBr3's most important reaction is with alcohols, where it replaces an OH group with a bromine atom to form alkyl bromide.
The nucleophilic substitution reaction occurs when alcohol reacts with phosphorous tribromide, resulting in the formation of alkyl bromide.

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