The observed rotation of a ______ mixture is 0º because the two ____ rotate plane-polarized light to an equal extent but in opposite directions, so the rotations cancel.

Answer:

The reason increasing atomic number doesn't always equate to increasing mass is because many atoms don't have the same number of neutrons and protons. In other words, several isotopes of an element may exist

Explanation:

Hope that helps!

In the context of atomic orbital (AO) wavefunctions, the terms "radial node" and "nodal plane" refer to different aspects of the wavefunction's behavior.

A radial node is a region in the AO wavefunction where the probability of finding an electron is zero along the radial direction. In other words, it represents a spherical shell where the electron is unlikely to be found. The number of radial nodes is determined by the principal quantum number (n) of the orbital. For example, the 2s orbital has one radial node, while the 2p orbital has no radial nodes.

On the other hand, a nodal plane is a flat plane within the AO wavefunction where the probability of finding an electron is zero along a particular direction. It represents a surface that divides the orbital into two regions of opposite phases. The number of nodal planes is determined by the angular quantum numbers (l and m) of the orbital. For example, the 2s orbital has no nodal planes, while the 2p orbital has one nodal plane (the xz or yz plane).

Radial nodes arise from the radial part of the wavefunction because they depend on the distance from the nucleus. The radial part determines the distribution of the electron density as a function of distance, and the nodes correspond to regions where the density drops to zero.

On the other hand, nodal planes arise from the angular part of the wavefunction because they depend on the orientation and shape of the orbital. The angular part describes the angular distribution of the electron density around the nucleus, and the nodal planes correspond to regions where the phase of the wavefunction changes sign.

In summary, radial nodes are related to the distance from the nucleus and arise from the radial part of the wavefunction, while nodal planes are related to the orientation and shape of the orbital and arise from the angular part of the wavefunction. The 2s orbital has one radial node and no nodal planes, while the 2p orbital has no radial nodes and one nodal plane.

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In order to properly measure the displacement, the object must be completely submerged, however in the diagram the wood is floating. So the measured displacement will only be a fraction of what it actually is.

Vertical uplift of water vapor in the atmosphere is known as evaporation.

Evaporation is the atmosphere process by which water is converted from its liquid state to its gaseous state (i.e., water vapor) due to the absorption of heat energy from the sun or other sources. This process occurs when water from lakes, rivers, oceans, and other bodies of water is heated and the water molecules gain enough energy to break free from the liquid and become water vapor.

Evaporation is an important process in the Earth's atmosphere, as it plays a key role in the water cycle and the distribution of water around the planet. It also influences the climate and weather patterns, as water vapor is a greenhouse gas that helps to trap heat in the atmosphere and plays a key role in the formation of clouds and precipitation.  

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Answer:

1.48×10²⁴ Cu atoms

Explanation:

For this question you need to use Avogadro's number 6.022×10²³atoms.

2.45 moles of Cu ×\(\frac{6.022x10x^{23} atoms }{1 mole}\)= 1.47539×10²⁴ atoms.

The moles cancel out so you are left with atoms.

Since there are 3 significant figures in the question there should be 3 significant figures in your answer, which is 1.48×10²⁴ Cu atoms.

Answer:

Element Helium have 2 energy levels.

Explanation:

HELIUM - With the symbol He and the atomic number 2, helium is a chemical element. It is a colorless , odorless, tasteless, non-toxic, inert, monatomic gas that is the first in the periodic table in the noble gas group. Of all the elements, its boiling point is the lowest.

At about 24 % of the total elemental mass, which is more than 12 times the mass of all the heavier elements combined, it is present. In both the Sun and Jupiter, its abundance is identical to this. This is due to helium-4's very high nuclear binding energy (per nucleon) with respect to the next three elements following helium.

Hence , the answer is 2 energy levels in Helium atom.

the density of gases in the thermosphere to the density at sea level is The atmosphere is 10 times denser at sea level.

Air density decreases with height. There are two reasons for this: higher altitudes have very little air pressing down from the above, and gravitationally is weaker farther away from the Earth's centre. As a result, at higher elevations, air molecules can scattered out more, resulting in a reduction in air density. Heavier gas will drop, while lighter air will rise. Because the compression caused by the mass of air above it, air at water level is denser. The quantity of gas molecules in the air reduces as altitude increases—the air becomes less tightly packed closer to sea level. This is what weathermen and mountaineers mean when they talk about "thin air." Thin air exerts less push than lower-altitude air.

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Answer:

b

Explanation:

Answer: The correct option is D. \(Zn+Cu^{2+}\rightarrow Zn^{2+}+Cu\)

Explanation:

Redox reaction is defined as the reaction in which oxidation and reduction take place simultaneously. It is known as the reaction in which the exchange of electrons takes place.  

The oxidation reaction is defined as the reaction in which a chemical species loses electrons in a chemical reaction. It occurs when the oxidation number of a species increases.

A reduction reaction is defined as the reaction in which a chemical species gains electrons in a chemical reaction. It occurs when the oxidation number of a species decreases.

From the given ionic reactions:

\(Zn+Cu^{2+}\rightarrow Zn^{2+}+Cu\)

On the reactant side:

Oxidation number of Zn = 0

Oxidation number of Cu = +2

On the product side:

Oxidation number of Cu = 0

Oxidation number of Zn = +2

As the oxidation number of Zn is increasing from 0 to +2. Thus, it is getting oxidized. Similarly, the oxidation number of Cu is decreasing from +2 to 0. Thus, it is getting reduced. Therefore, forming a redox couple

Hence, the correct option is D. \(Zn+Cu^{2+}\rightarrow Zn^{2+}+Cu\)

Answer:

i think it would 40

Explanation:

Answer:

C.) Lactobacillus

Explanation:

Is a prokaryote with a simple rod shaped structure. Similar to other prokaryotic bacterium of its shape it has a cell wall, and capsule.

Answer:

vapor pressure, atmospheric pressure

Explanation:

the boiling point of a liquid is the temperature at which its vapor pressure is equal to the pressure of the gas above it.

(I'm not too sure if this is right but I think it is)

The capital structure weights used in computing the weighted average cost of capital (WACC) are based on the market value of the firm's debt and equity securities.

When calculating the WACC, the capital structure weights reflect the proportionate value of the firm's debt and equity in the market. These weights are determined based on the market value of the firm's debt and equity securities, which considers the current market prices and investor perceptions of the company's financial health and risk. The market value of debt and equity securities can fluctuate over time due to changes in interest rates, market conditions, and investor sentiment. Using market values rather than book values provides a more accurate representation of the firm's capital structure and reflects the true costs of capital. Book values, on the other hand, are based on historical accounting records and may not reflect the current market conditions or investors' expectations. Therefore, market value-based weights are commonly used to calculate the WACC, allowing for a more precise assessment of the cost of capital for the firm.

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Answer:

C

Explanation:

cause i'm smart

Answer:

D

Explanation:

Because it says tree roots breaking rocks into smaller rocks.

Hope this helped!

Answer: compound thing(picture attached)

Bronze is an alloy made by combining copper and tin. The exact composition of bronze can vary depending on the desired properties, but generally, bronze contains anywhere from 5% to 25% tin.

The reasons why the first humans experimented with making bronze are not fully known, but it is believed that they discovered that adding tin to copper improved its properties, making it harder, more durable, and easier to cast. This would have made it more suitable for weapons, tools, and other objects.

Bronze provided several benefits to early humans. Firstly, bronze tools and weapons were much more durable than those made of pure copper or stone. This made it easier for early humans to hunt, farm, and build, and allowed them to produce more sophisticated and efficient tools. Additionally, bronze objects were more aesthetically pleasing and could be used for decorative purposes. Bronze also played an important role in early trade, as it could be used as a form of currency and was highly valued by many cultures.

In summary, bronze was an important technological advancement in early human history, and its discovery and use played a significant role in the development of human civilization.

Explanation:

it is true that chemistry ionic compounds can contain polyatomic ions with multiple charge cations. These polyatomic ions are formed when two or more atoms covalently bond to form an ion with an overall charge, and they can combine with ions of opposite charge to form an ionic compound.

Ionic compounds are chemical compounds composed of cations (ions with a positive charge) and anions (ions with a negative charge), which are attracted to each other by electrostatic forces. It is true that chemical ionic compounds can contain polyatomic ions with multiple charge cations.

Polyatomic ions are ions that contain two or more atoms covalently bonded and have an overall charge. For example, the polyatomic ion ammonium (NH4+) has four hydrogen atoms covalently bonded to a nitrogen atom, giving the ion a charge of +1. Other polyatomic ions include carbonate (CO32-), sulfate (SO42-), and phosphate (PO43-).

These polyatomic ions can be present in ionic compounds, which are formed when these ions combine with ions of opposite charge to form a crystal lattice structure. The cations and anions in the compound must have a net charge of zero.

In conclusion, it is true that chemistry ionic compounds can contain polyatomic ions with multiple charge cations. These polyatomic ions are formed when two or more atoms covalently bond to form an ion with an overall charge, and they can combine with ions of opposite charge to form an ionic compound.

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We need 3.547 mL of 2.155 M KOH solution to titrate 25.00 mL of 0.3057 M HC3H5O2 solution. To determine the number of milliliters of 2.155 M KOH(aq) required to titrate 25.00 mL of 0.3057 M HC3H5O2(aq) (propionic acid), we need to use the balanced chemical equation between KOH and HC3H5O2.

The equation is:

KOH(aq) + HC3H5O2(aq) → KC3H5O2(aq) + H2O(l)

From the equation, we can see that 1 mole of KOH reacts with 1 mole of HC3H5O2. Therefore, the number of moles of HC3H5O2 in 25.00 mL of 0.3057 M solution is:

n(HC3H5O2) = M(HC3H5O2) × V(HC3H5O2) = 0.3057 mol/L × 0.02500 L = 0.0076435 mol

Since the stoichiometric ratio between KOH and HC3H5O2 is 1:1, we need 0.0076435 moles of KOH to react with the given amount of HC3H5O2. The number of milliliters of 2.155 M KOH solution required is:

V(KOH) = n(KOH) ÷ M(KOH) = 0.0076435 mol ÷ 2.155 mol/L = 0.003547 L or 3.547 mL (rounded to three significant figures)

Therefore, we need 3.547 mL of 2.155 M KOH solution to titrate 25.00 mL of 0.3057 M HC3H5O2 solution.

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The phenomenon observed, where water at the top of the mountain started boiling before the water at lower stations, can be attributed to the difference in atmospheric pressure at various elevations.

Atmospheric pressure decreases with increasing altitude. The pressure exerted by the atmosphere affects the boiling point of a liquid. As the pressure decreases, the boiling point of a substance also decreases.

This is because boiling occurs when the vapor pressure of the liquid equals the atmospheric pressure. When the atmospheric pressure decreases, the vapor pressure required for boiling is reached at a lower temperature.

On top of the mountain, where the atmospheric pressure is lower, the boiling point of water is lower compared to the stations at lower elevations.

Therefore, even if the water at each station was at the same initial temperature, the water at the top of the mountain reached its boiling point first because the lower atmospheric pressure allowed the vapor pressure to be achieved at a lower temperature.

In contrast, the stations located at lower elevations experience higher atmospheric pressure, requiring a higher temperature to reach the boiling point of water. Hence, the water at these stations takes longer to reach the boiling point compared to the water at the top of the mountain.

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Answer:

C₂H6

Explanation:

Among the given options, the formula A) C₂H6 represents a hydrocarbon (specifically, ethane). Option A

A hydrocarbon is a compound that consists of only carbon and hydrogen atoms. It is important to identify the formula that represents a hydrocarbon among the given options:

A) C₂H6: This formula represents ethane, which is a hydrocarbon. Ethane consists of two carbon atoms bonded together with single bonds and six hydrogen atoms.

B) C₂H5OH: This formula represents ethanol, which is not a hydrocarbon. Ethanol contains a hydroxyl group (-OH), indicating the presence of oxygen in addition to carbon and hydrogen atoms. It is an alcohol, not a hydrocarbon.

C) C₂H5Cl: This formula represents ethyl chloride, which is not a hydrocarbon. Ethyl chloride contains a chlorine atom (Cl) in addition to carbon and hydrogen atoms. It is a haloalkane, not a hydrocarbon.

D) C₂H6O: This formula represents ethanol, which, as mentioned before, is not a hydrocarbon. Ethanol contains an oxygen atom (O) in addition to carbon and hydrogen atoms. It is an alcohol, not a hydrocarbon.

Among the given options, the formula A) C₂H6 represents a hydrocarbon (specifically, ethane). It consists only of carbon and hydrogen atoms, making it a suitable representation of a hydrocarbon.

In summary, the formula C₂H6 (option A) represents a hydrocarbon, while the other options contain additional elements (oxygen or chlorine) that make them non-hydrocarbon compounds. Option A

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Answer:

Micro, milli, deci, deca, mega

Explanation:

the suffix each denote the amount in comparison to a liter

Answer:

See Attached Table

Explanation:

Instrumental methods of chemical analysis have several advantages over traditional methods. Some of these advantages are; Increased sensitivity, specificity, Speed, Accuracy and precision, and Quantitative analysis.

Instrumental methods are often more sensitive than traditional methods, allowing for detection and quantification of lower concentrations of analytes.

Instrumental methods can distinguish between different analytes that have similar chemical properties, which is not possible with some traditional methods.

Instrumental methods are often faster than traditional methods, allowing for the analysis of a larger number of samples in a shorter period of time.

Instrumental methods are generally more accurate and precise than traditional methods, due to the use of advanced instrumentation and automation.

Instrumental methods can be used to measure the quantity of a specific analyte in a sample, which is not always possible with traditional methods.

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The number of moles of Mg, Cl, and O atoms in 2.50 moles of Mg(ClO4)2 is 2.50, 5.00, and 20.00, respectively.

To calculate the number of moles of magnesium (Mg), chlorine (Cl), and oxygen (O) atoms in 2.50 moles of magnesium perchlorate (Mg(ClO4)2), we need to consider the subscripts in the chemical formula. In Mg(ClO4)2, there are 2 moles of chlorine atoms (2Cl), 8 moles of oxygen atoms (8O), and 1 mole of magnesium atoms (1Mg).
So, in 2.50 moles of Mg(ClO4)2, there will be:
- 2.50 moles * 2 moles of chlorine = 5.00 moles of Cl
- 2.50 moles * 8 moles of oxygen = 20.00 moles of O
- 2.50 moles * 1 mole of magnesium = 2.50 moles of Mg
The number of moles of Mg, Cl, and O atoms in 2.50 moles of Mg(ClO4)2 is 2.50, 5.00, and 20.00, respectively.

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Answer: I think the answer is 9.60s

Explanation: Hope it helps :)

Answer:

hydrant flying with balloon, balloon has lithp letting air out, bee: really yum balloon

    =                           =                                 =                                   =

hydrogen              helium                     lithium                     beryllium

be bore on the balloon, balloon pops, hydrant drops and makes a car bomb

           =                                                                                                  =

    boron                                                                                              carbon

night row general gets hurt by car bomb nearby, that general gets off boat

        =                                

nitrogen

wearing oxygen mask, mask is full of fluride gel, then he got neon teeth

             =                                               =                                      =

         oxygen                                fluorine                                neon

(try making a story out of the elements, use your imagenation)

I will give u tips to learn whole periodic table

1. Break down the table into sections

2. Spread out the memorisation process

3. Learn the elements in a song

4. Make none sense words made from element symbols

5. Use colour to learn element groups

6. Use mnemonic device to help remember the order of elements

I am sure this will be helpful for uuu

Explanation:

Answer:

D. 48 N down

Explanation:

Given that:

Mass of climber = 85 kg, Tension on rope = 785 N, acceleration due to gravity = 9.8 m/s²

To calculate the net force on the climber, we need to first calculate the weight of the climber. Since the climber is affected by the earth gravity, the weight of the climber is the product of his mass and the acceleration due to gravity, therefore:

Weight = mass × acceleration due to gravity = 85 kg × 9.8 m/s² = 833 N

The weight of the climber is acting downwards while tension on the rope is acting upwards, therefore:

Net force on the climber = 785 N - 833 N = - 48 N

This means that the net force on the climber is 48 N downwards

Answer:

48 N down

Explanation:

Ayepecks

Answer:

8.29 mL

Explanation:

The limiting reactant: Nitrogen gas (N2)

The excess reactant: Hydrogen gas (H2)

Molar mass of hydrogen gas: 2.016 grams/mol

Molar mass of nitrogen gas: 28.02 grams/mol

Molar mass of ammonia (NH3): 17.04 grams/mol

To find the amount of ammonia produced we can use the concept of limiting reactant. The limiting reactant is the one that runs out first and limits the amount of product that can be formed. In this case, we have 10.0 grams of nitrogen gas and 10.0 grams of hydrogen gas.

To find the amount of ammonia produced, we need to find out which reactant is limiting.

N2 + 3H2 → 2NH3

1 mole of N2 and 3 mole of H2 required for 1 mole of NH3.

10.0 g N2 / 28.02 g/mol N2 = 0.357 moles N2

10.0 g H2 / 2.016 g/mol H2 = 4.96 moles H2

To find the amount of ammonia produced we will use the limiting reactant N2, and it's stoichiometry in the reaction.

0.357 moles N2 * 2 moles NH3 / 1 mole N2 = 0.714 moles NH3

And to find the mass of ammonia produced we can use the molar mass of NH3

0.714 moles NH3 * 17.04 g/mol NH3 = 12.16 grams

Amount of ammonia produced: 12.16 grams