magnesium metal (0.100 mol) and a volume of aqueous hydrochloric acid that contains 0.500 mol of hcl are combined and react to completion. how many liters of hydrogen gas, measured at stp, are produced? mg(s) 2hcl(aq) → mgcl2(aq) h2(g)magnesium metal (0.100 mol) and a volume of aqueous hydrochloric acid that contains 0.500 mol of hcl are combined and react to completion. how many liters of hydrogen gas, measured at stp, are produced? mg(s) 2hcl(aq) → mgcl2(aq) h2(g)

The pressure in tank X is greater than that in tank Y because the number of moles or mass of argon gas in Tank X is greater than the number of moles or mass of nitrogen gas in Tank Y.

The pressure of a gas is the force that molecules of the gas exert per unit area of the walls of their container due the collisions of the gas molecules with themselves and with the walls of their contain.

The pressure of a gas is related to the volume (V), temperature (T) and number of moles (n) of the gas by the formula:

where;

Since volume, temperature and R is constant for the two gases, the pressure difference will be determined by the number of moles of each gas.

Number of moles of a gas is proportional to the mass of the gas present.

Therefore, the best explanation as to why the pressure in tank X is greater than that in tank Y is that the number of moles or mass of argon gas in Tank X is greater than the number of moles or mass of nitrogen gas in Tank Y.

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Answer:

D. Both are used by radio stations to transmit sound

Explanation:

The main difference between both modulations is that in frequency modulation, the frequency of the carrier wave is modified as per the transmit data, while in amplitude modulation, the carrier wave is modified according to the data. because of this it can NOT be A, B, or C but it CAN be D

PLZ MARK AS BRAINLIEST :)

The amplitude modulation and frequency modulation techniques similar as , Both are used by radio stations to transmit sound.

So, option D is correct one.

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Answer: CH2O I just did the question

Explanation:

Empirical formula is the simplest whole number ration of elements in a compound. Molecular formula is n times where n is integers 1,2,... Therefore, the empirical formula that is 40.00% carbon, 6.71% hydrogen, and 53.29% oxygen is CH\(_2\)O.

Empirical formula gives the proportion of the element that is present in a compound. It does not give information about the actual number or the arrangements of the atoms.

Number of gram atoms in compound = percentage of that element ÷Molar mass of that element

Molar mass of carbon=12

Molar mass of hydrogen =1

molar mass of oxygen=16

C= 40.00%÷24=1.66

H= 6.71%÷1=6.71

O=53.29%÷/16=3.33

The atomic ratio is1.66:6.71:3.33. Dividing by smallest whole number, the Whole number ratio is C:H:O is 1:2:1. Empirical formula corresponding to this whole number is CH\(_2\)O.

Therefore, the empirical formula that is 40.00% carbon, 6.71% hydrogen, and 53.29% oxygen is CH\(_2\)O.

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The arrangement of the elements by increasing ionization energy is; Kr < Ar < Ne < He.

However, If item 1 should be the highest, then we have; He > Ne > Ar > Kr.

The ionization energy of an element is simply defined as the quantity/amount of energy required to completely remove an electron from its outermost shell.

However, periodic trends occur in the periodic table.

In essence, the larger the atomic radii of elements, the lesser is their ionization energy.

Consequently, inference drawn from the statements above is enough to conclude that elements with smaller atomic radii have higher ionization energy as the electrons are closer to the nucleus and the electrostatic attraction is greater.

Ultimately, the arrangement of the elements by increasing ionization energy is;

However, If item 1 should be the highest, then we have;

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hmmm water

Explanation:

Water can change if you put food coloring

in it

When it comes to aviation fuel, safety is of utmost importance. The recommended fuel for an aircraft is determined by the manufacturer and it is crucial to follow these recommendations in order to maintain the safety of the aircraft and its passengers.

However, there may be instances where the recommended fuel is not available. In these situations, it is important to understand the options available.
One possible alternative fuel option is to use a fuel with a lower octane rating. This can be done if the aircraft's engine is designed to operate on a lower-octane fuel. However, it is important to note that using a lower octane fuel can result in decreased engine performance and potential damage to the engine over time.
Another option is to use aviation fuel with a higher octane rating than recommended. This can be done if the aircraft's engine is designed to operate on higher-octane fuel. However, using a higher octane fuel than recommended may also result in decreased engine performance and potentially cause engine damage.
Ultimately, the best course of action is to follow the manufacturer's recommendations for the type of fuel to use in the aircraft. If the recommended fuel is not available, it is important to consult with a qualified aviation mechanic or fuel expert before making any substitutions. Safety should always be the top priority when it comes to aviation fuel selection.

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To calculate the decrease in temperature when 6.00 L at 20.0 °C is compressed to 4.00 L, we need to use the ideal gas law, PV = nRT.

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Answer:

Explanation:

CaCO3 = 1*Ca + 1*C + 3*O

              =1*40 + 1*12 + 3*16

               =40 + 12 + 48

               =100 amu

Answer:

a.polar covalent

b.ovalent

c.covalent

d.covalent

Explanation:

a.the atomic number of nitrogen is 7 and atomic number of hydrogen is 1, so the type of bond firmed btw them is called polar covalent

b.The total valence electrons in sulphur atom are 6.thus, one atom of carbon forms two *Covalent bonds* with sulphur atoms each in order to complete it octet. Hence, the bond btw carbon and sulfur us covalent bond

c.The two fluorine atom form a stable F molecule by sharing two element ; the linkage ² is called a Covalent bonds

Answer:

An aquifer

Explanation:

here's your answer

Answer:

aquifer

Explanation:

solid rock that holds ground water is cold aquifer

Answer:

quartz (SiO2)n

Explanation:

Melting point is defined as the temperature or point at which the substances change its state from solid to liquid.

Quartz (SiO2)n has high melting point than O2 because Quartz (SiO2)n is found in the form of hard, crystalline mineral that is made up of silicon and oxygen atoms having strong covalent bonds between all the atoms. So, a lot of energy is required to break the bond between the atoms and it has a high melting point.

Hence, the correct answer is quartz (SiO2)n.

Urushiol is a mixture of catechol derivatives that is found in plants such as poison ivy, poison oak, and poison sumac. The severity of an allergic response to urushiol is largely determined by the structure of the hydrocarbon tail of catechols in urushiol.

A lengthy chain of carbon atoms with a variable number of double bonds makes up the hydrocarbon tail of catechols in urushiol. The catechol is more reactive and more likely to result in an allergic reaction if the hydrocarbon tail contains more double bonds.

This is due to the fact that catechols are known to be extremely reactive substances that readily oxidise and produce reactive intermediates that might harm tissue. Catechols' hydrocarbon tails have double bonds that make them more vulnerable to oxidation, which raises their reactivity and increases the possibility that allergic reactions would result.
Additionally, the length of the hydrocarbon tail can also affect the severity of an allergic response to urushiol. Longer hydrocarbon tails can make the molecule more lipophilic, which allows it to penetrate deeper into the skin and increase the severity of the allergic reaction.
In conclusion, the structure of the hydrocarbon tail of catechols in urushiol plays a critical role in determining the severity of an allergic response. Catechols with longer and more reactive hydrocarbon tails are more likely to cause severe allergic reactions.

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Answer:

i want to see a pic but if you got nice toes all give you my number

Explanation:

Answer:

nah Im good

Explanation:

single forever

Answer:

i believe its A or D

Explanation:

sorry is its wrong

hope it helps

Answer: 0.071 moles of excess reactant \((O_2)\) will be left over.

Explanation:

To calculate the moles, we use the equation:

\(\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar mass}}\)

a) moles of \(NO\)

\(\text{Number of moles}=\frac{21.6g}{30.01g/mol}=0.720moles\)

b) moles of \(O_2\)

\(\text{Number of moles}=\frac{13.8g}{32g/mol}=0.431moles\)

\(2NO(g)+O_2(g)\rightarrow 2NO_2(g)\)

According to stoichiometry :

2 moles of \(NO\) require 1 mole of \(O_2\)

Thus 0.720 moles of  \(NO\) require=\(\frac{1}{2}\times 0.720=0.360moles\) of \(O_2\)

Thus \(NO\) is the limiting reagent as it limits the formation of product and \(O_2\) is the excess regaent.

moles of \(O_2\) left = (0.431-0.360) = 0.071 moles

Dialysis tubing is a tool that separates larger molecules from smaller ones by allowing them to pass through a membrane, which is ideal for comparing the concentrations of different solutions. By placing the different concentrations of starch solution in two separate beakers, the concentration of each can be measured by the mass of the tubing after immersion in each.  

Dialysis tubing is used to separate starch molecules from water molecules in this experiment. The mass of the tubing, which is filled with the starch solution, will be different depending on the concentration of starch in each solution. The more concentrated solution will weigh more after being immersed in the dialysis tubing because the tubing will absorb more of the solution.
To perform this experiment, you would first soak the dialysis tubing in a beaker of water to soften it. Then, after measuring different amounts of starch solution in each beaker, you would carefully fill the dialysis tubing with each solution using a syringe. After the tubing is filled, tie off the ends and suspend it in another beaker of water. After a period of time, typically 30 minutes to an hour, remove the tubing and dry it. Weigh the tubing and compare the two weights.
The more concentrated solution will weigh more than the less concentrated solution. If the dialysis tubing is more massive after being immersed in one of the beakers, that indicates that the starch solution in that beaker is more concentrated. As a result, by using dialysis tubing, it is possible to determine which starch solution is more concentrated.

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Answer:

Hailey should add, they are inexpensive to produce.

Explanation:

Reason being why they are inexpensive to produce, is due to them being chemical based and easy to product in the factory setting. Which makes them extremely cheap to make.

Reason being why the others are wrong, synthetic polymers are not biodegradable as they are made in a factory with oils. Synthetic polymers are not flexible due to them being used for harder products. Synthetic polymers are not recycled cheaply as they are made with chemicals which makes it very hard to recycle.

answer:D

Explanation: i took it

The required pressure of the gas is 546 mmHg.

Relation between the volume and pressure of gas is explained through the ideal gas equation PV = nRT, and for the question required equation is:

P₁V₁ = P₂V₂, where

P₁ & V₁ are the initial pressure and volume.

P₂ & V₂ are the final pressure and volume.

On putting values from the question to the equation, we get

P₂ = (780)(350) / (500) =

P₂ = 546 mmHg

Hence required pressure is 546 mmHg.

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The ratio of effusion rates for the lightest gas H₂ to the heaviest known gas UF₆ is 13.21 to 1

Effusion is a process by which a gas escapes from its container through a tiny hole into evacuated space.

Rate of effusion ∝ 1/√Ц, (where Ц is molar mass)

Rate H₂ = 1/√ЦH₂

Rate UF₆ = 1/√ЦUF₆

Therefore, Rate H₂/ Rate UF₆ = √ЦH₂/√ЦUF₆

ЦH₂= 2.016 g/mol

ЦUF₆= 352.04 g/mol

Rate H₂ / Rate UF₆ = √352.04/√2.016 = 18.76/1.42

Rate H₂ / Rate UF₆ = 13.21

Therefore, H₂ is lower mass than UF₆. Thus H₂ gas will effuse 13 times more faster than UF₆ because the most probable speed of H₂ molecule is higher; therefore, more molecules escapes per unit time.

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A ground state atom of the element that has the one electron in its fourth and the outermost main energy level is the correct option is a. K.

The atomic number of the element potassium ,K is 19. The potassium atom has the 19 protons and the 19 electrons. There are 2 electrons on the potassium atom first energy level, the 8 electrons on the potassium atom second level, the 8 electrons on the potassium atom third energy level, and 1 on the potassium fourth energy level.

Thus, the fourth energy level of the element potassium has the only 1 electron.

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The dichromate peak at 370 nm cannot be used to determine the Cr concentration because it is an oxidizing agent. The oxidizing agent forms a complex with the Cr that is not measured in the sample, thus making it an unreliable measure of the Cr concentration.

The reason we did not use the dichromate peak at 370 nm to determine the Cr concentration is because the peak is too close to the UV region and the absorbance is too low for accurate measurement.

In UV-Vis spectroscopy, the absorbance of a compound is measured at different wavelengths to determine its concentration. However, the absorbance of a compound is dependent on the wavelength of the light used. At shorter wavelengths, such as those in the UV region, the absorbance is generally lower and less accurate.

The dichromate peak at 370 nm is too close to the UV region, which means that the absorbance at this wavelength is likely to be low and less accurate. Therefore, it is not a good choice for determining the Cr concentration. Instead, it is better to use a peak with a higher absorbance, such as the one at 440 nm, which is further away from the UV region and will provide a more accurate measurement.

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Answer:

Fredrick Mohs

Explanation:

Its just right G

To determine the number of moles of NH3 needed to produce 27 moles of H2O, we need to use the coefficients in the balanced chemical equation for the reaction:

4NH3 + 6NO → 5N2 + 6H2O

Since the coefficients represent the stoichiometric ratios between the reactants and products, we can use them to determine how many moles of NH3 are needed for a certain amount of H2O produced.

For every 6 moles of H2O produced, 4 moles of NH3 are consumed. Therefore, to produce 27 moles of H2O, we need 4 * (27 moles H2O / 6 moles H2O/mol NH3) = 27 moles H2O / (6 moles H2O / 4 moles NH3) = 27 * (4 moles NH3 / 6 moles H2O) = 18 moles of NH3.

So, 18 moles of NH3 are needed to produce 27 moles of H2O.

Answer:

phosphorous acid

Explanation:

PO4 (phsophate) is a polyatomic, so when the subscript changes, so does the name and it becomes phosphite (one less oxygen atom)

if the name of the polyatomic ends in ite, the ending of the acid name becomes ous making it phosphorous acid.

You don't need to worry about the hydrogen in the naming process because it is an oxyacid, where you only really worry about the polyatomic (acid tells you there is hydrogen)

Answer:

The alkanes comprise a series of compounds that are composed of carbon and hydrogen atoms with single covalent bonds. This group of compounds comprises a homologous series with a general molecular formula of C n H 2 n+2 , where equals any integer.

Explanation:

The general formula for the alkane series is CnH2n+2

In this formula:

"Cn" shows how many carbon atoms are in the alkane molecule.

"H2n+2" shows the amount of hydrogen atoms in the alkane compound, with "n" being the number of carbon atoms.

Alkanes are a group of hydrocarbons that only have single bonds between their carbon atoms. The formula says that each carbon atom is connected to two hydrogen atoms. And the total number of hydrogen atoms in an alkane molecule is two more than double the number of carbon atoms.

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The reaction between cyclohexene and bromine in CCl4 at -5 °C proceeds to form dibromocyclohexane.

The reaction between cyclohexene and bromine in CCl4 is an example of a halogenation reaction. At -5 °C, the reaction proceeds via a mechanism known as electrophilic addition.

Initially, the bromine molecule (Br2) approaches the pi bond of cyclohexene. One of the bromine atoms becomes electrophilic due to the polarization of the Br-Br bond, making it partially positive (Brδ+).

Simultaneously, the pi electrons of the double bond in cyclohexene act as a nucleophile and attack the electrophilic bromine, leading to the formation of a cyclic bromonium ion intermediate.

In the next step, the bromide ion (Br-) present in the solution acts as a nucleophile and attacks the cyclic bromonium ion. This nucleophilic attack results in the formation of a bromohydrin intermediate.

Finally, the bromohydrin undergoes an intramolecular elimination, facilitated by the presence of the chloride solvent (CCl4), resulting in the formation of dibromocyclohexane.

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