What does "X" represent in the following symbol?
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The combined Gas Law equation is represented by B) P1V1 / T1 = P2V2 / T2.

The combined gas law is the law that combines Charles’s law, Gay-Lussac’s law, and Boyle’s law.

Combined gas law can be mathematically expressed as

k = PV/T

Where,

P = pressure

T = temperature in kelvin

V = volume

K  = constant (units of energy divided by temperature)

When two substances are compared in two different conditions, the law can be stated as,

P1V1/T1 = P2V2/T2

Where,

P1 = initial pressure

V1 = initial volume

T1 = initial temperature

P2 = final pressure

V2= final volume

T2 = final temperature

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Krypton, Chromium, and Oxygen with the following symbols Kr-13, Cr-2, and O-15 respectively have 23 electrons.

The atomic number of an atom determines the number of electrons it has. When the number of protons is equivalent to the number of electrons, the atom is electrically neutral. An anion, on the other hand, is an atom with a negative charge. It has gained an electron or two, or even more. Below are the chemical symbols for three different atoms or atomic anions with 23 electrons.Krypton:Kr has an atomic number of 36, indicating that it has 36 electrons. However, if we add 13 electrons to it, the total number of electrons becomes 49. Krypton with 13 additional electrons becomes Kr-13, with a total of 49 electrons.Chromium:Cr has an atomic number of 24, indicating that it has 24 electrons. Adding two more electrons to it, the total number of electrons becomes 26. The atomic anion with 26 electrons is Cr-2.Oxygen:Oxygen has an atomic number of 8, indicating that it has 8 electrons. However, if we add 15 electrons to it, the total number of electrons becomes 23. Oxygen with 15 additional electrons becomes O-15, with a total of 23 electrons.

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23 degrees Fahrenheit equals -5 degrees Celsius!

Also heres a free meme

Answer:

The reaction: 2C2H2+5O2->5O2->4CO2+2H2O is performed by mixing 175 grams of C2H2 and 175 grams of O2 to produce 127 grams of CO2

1)Limiting reagent

2)Theretical yeield of CO2

3)Percent yield of CO2

Explanation:

I think

Answer:

The cytoplasm of erythrocytes is rich in hemoglobin, an iron-containing biomolecule that can bind oxygen and is responsible for the red color of the cells and the blood. Each human red blood cell contains approximately 270 million of these hemoglobin molecules.

Explanation:

hope this helps(;

Answer:

1) SpongeBob’s question is that "what would be the appropriate way to wash his favorite pants as they don't seem as clean as earlier"?

2) SpongeBob’s claim that Clean-O detergent is unable to wash the pants more cleaner as compared to plain water.

3) Independent variable in the given example is the quantity of Clean-O detergent and plain water as it can be changed or manipulated.

4) Dependent variable in the given example is the cleanliness of pants as it will be affected by the quantity of Clean-O detergent and plain water which is an independent variable.

Exactly 149.6J will raise the temperature of 10.0g of a metal from 25.0C. The specific heat capacity of the metal is 5.984 J/g°C.

The heat capacity of a sample of a substance divided by the mass of the sample yields the specific heat capacity (symbol c), also known as massic heat capacity. Informally, it is the quantity of heat that must be added to one unit of a substance's mass in order to raise its temperature by one unit. The specific heat capacity unit in the SI is the joule per kelvin per kilogram, or Jkg⁻¹K⁻¹. For instance, the specific heat capacity of water is 4184 J kg⁻¹K⁻¹, or the amount of energy needed to raise 1 kilogram of water by 1 K.

The specific heat capacity of the metal can be calculated using the equation Q = m × c ×ΔT.

Q = 149.6J

m = 10.0g

ΔT = (final Temperature - initial Temperature) = (25°C - 0°C) = 25°C

Plugging these values into the equation, we get:

149.6J = 10.0g × c ×25°C

Solving for c, we get:

c =  \(\frac{149.6J}{(10.0g *25C)}\)

c = 5.984 J/g°C

Therefore, the specific heat capacity of the metal is 5.984 J/g°C.

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Answer:   m =  4.2 gAgCl

Explanation:  

Answer:

An atom is the smallest particle of an element that still has the properties of that element. Atoms, in turn, are composed of subatomic particles, including negative electrons, positive protons, and neutral neutrons. The number of protons in an atom determines the element it represents.

Explanation:

The smallest possible particle of an element is a atom. The remainder is made up of a cloud of negatively charged electrons around a positively charged nucleus made up of protons and neutrons.

The smallest unit of matter that may be split without producing electrically charged particles is the atom. It is also the smallest piece of substance with chemical element-like characteristics. Electric forces, which link electrons towards the nucleus of atoms, cause them to be drawn to any positive charge.

Space makes up the majority of an atom. The remainder is made up of a cloud of negatively charged electrons around a positively charged nucleus made up of protons and neutrons. Compared to electrons, that are the smallest charged particles in nature, the nucleus is tiny and dense.  

Therefore, the smallest possible particle of an element is a atom.

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Answer:

its sodium hydroxide

Explanation:

Weathering changes the chemical and physical nature of an element that is why it is often difficult to identify a highly weathered mineral.

The breakdown and alteration of rocks and minerals at or near the Earth's surface as a result of exposure to various weathering agents, such as water, wind and temperature changes is known as weathering.

Minerals can undergo physical changes as a result of weathering, such as being broken up into smaller pieces or having their color and texture altered. Additionally, it may result in chemical alterations such as the removal or addition of specific chemical components.

This may lead to the creation of brand-new minerals or the modification of already existing minerals into new ones.  Highly weathered minerals might not still possess the same physical and chemical characteristics as their unweathered counterparts.

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The theoretical yield of Cu(NO3)2 is 20.259 grams.

To determine the theoretical yield of Cu(NO3)2, we need to calculate the amount of copper reacting with the silver nitrate and use stoichiometry to convert that amount to the molar mass of Cu(NO3)2.

First, let's find the molar mass of silver nitrate (AgNO3):

AgNO3 = 107.87 g/mol (Ag) + 14.01 g/mol (N) + 3 * 16.00 g/mol (O) = 169.87 g/mol

Next, we need to calculate the amount of copper that reacts with the given mass of silver nitrate. The molar mass of copper (Cu) is 63.55 g/mol.

Using the molar ratio from the balanced chemical equation, we can relate the moles of copper to the moles of silver nitrate. The balanced equation is:

Cu + 2AgNO3 -> Cu(NO3)2 + 2Ag According to the equation, 1 mole of copper reacts with 2 moles of silver nitrate.

Now we can calculate the moles of copper reacting with 36.7 g of silver nitrate:

moles of AgNO3 = (mass of AgNO3) / (molar mass of AgNO3)

moles of AgNO3 = 36.7 g / 169.87 g/mol = 0.2160 mol AgNO3

Using the stoichiometric ratio, we find the moles of Cu:

moles of Cu = (moles of AgNO3) / (2 moles of AgNO3 per 1 mole of Cu)

moles of Cu = 0.2160 mol AgNO3 / (2 mol AgNO3/1 mol Cu) = 0.1080 mol Cu

Finally, we can calculate the theoretical yield of Cu(NO3)2 using the molar mass of Cu(NO3)2:

theoretical yield of Cu(NO3)2 = (moles of Cu) * (molar mass of Cu(NO3)2)

theoretical yield of Cu(NO3)2 = 0.1080 mol * (63.55 g/mol + 2 * (14.01 g/mol + 3 * 16.00 g/mol))

theoretical yield of Cu(NO3)2 = 0.1080 mol * 187.56 g/mol

theoretical yield of Cu(NO3)2 = 20.259 g

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Answer:

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Explanation:

The total amount of hydrogen gas generated is 9.76 L, under the condition that 15.9 g of hydrochloric acid reacts with excess zine metal.

Furthermore the balanced chemical equation for the reaction between hydrochloric acid and zinc metal is:
2HCl + Zn → ZnCl₂ + H₂
The molar mass of HCl is 36.46 g/mol.
Then, 15.9 g of HCl is equivalent to 15.9 g / 36.46 g/mol = 0.436 mol of HCl.
As per  the balanced chemical equation, 1 mole of HCl reacts with 1 mole of Zn to produce 1 mole of H₂ gas.
Hence, 0.436 mol of HCl will produce 0.436 mol of H₂ gas.
In Stp (Standard Temperature and Pressure), one mole of any gas occupies 22.4 L.
So, 0.436 mol of H₂ gas will occupy:
0.436 mol × 22.4 L/mol = 9.76 L (approx)
Then, approximately 9.76 L of hydrogen gas will be produced when 15.9 g of hydrochloric acid reacts with excess zinc metal at STP.
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The question requires us to identify the molecular formula of a molecule formed between phosphorus (P) and chlorine (Cl).

The first step to solve this question is write the electronic configuration of both atoms involved (P and Cl) and, from the number of valence electrons, identify how many bonds each one should make.

P has atomic number 15, thus its electronic configuration is: 1s2 2s2 2p6 3s2 3p3

Cl has atomic number 17, thus its electronic configuration is: 1s2 2s2 2p6 3s2 3p5

Note that P has 5 valence electrons (3s2 and 3p3) while Cl has 7 valence electrons (3s2 3p5).

For P, we should expect 3 bonds to other atoms in order to reach the octet, while for Cl, we should expect 1 bond to another atom to achieve the octet.

With that in mind, we can say that each Cl will bond to one P, and we need 3 Cl. Therefore, the molecular formular is PCl3 (the last option).I

\(= 5 * 10^{13} * 0.056169 = 0.2808 * 10^{13}\)The ratio of  [Ag+] to [Ag(S₂O₃)₂³⁻] in a bath to which [S₂O₃²⁻] = 0.0237 M is 3.56 x 10⁻¹³.

In processing black and white photographic film, excess silver(I) halides are removed with sodium thiosulfate.

The reaction for this treatment based on complexation is:

Ag+(aq) + 2S₂O₃²⁻(aq) ⇒ Ag(S₂O₃)₂³⁻(aq)

For this reaction:

\(K_{f} = \frac{[Ag(S_{2}O_{3})_{2}^{3-}]}{[Ag^{+}] [S_{2}O_{3}^{2-}]^{2}}\) = \(5 * 10^{13}\)

Given that, [S₂O₃²⁻] = 0.237 M

We can deduce that:

\(K_{f} = \frac{[Ag(S_{2}O_{3})_{2}^{3-}]}{[Ag^{+}] [0.237]^{2}}\) = \(5 * 10^{13}\)

Therefore

\(\frac{[Ag(S_{2}O_{3})_{2}^{3-}]}{[Ag^{+}]}\)  \(= 5 * 10^{13} * 0.056169 = 0.2808 * 10^{13}\)

The equation becomes:

\(\frac{[Ag^{+}]}{[Ag(S_{2}O_{3})_{2}^{3-}]}\) = \(\frac{1}{0.2808 * 10^{13} }\) = \(3.56 * 10^{-13}\)

The ratio for [Ag+] to [Ag(S₂O₃)₂³⁻] is 3.56 x 10⁻¹³

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The triple point pressure or the pressure in atm at which the solid, liquid, and gas phases of SO₂ can coexist at the same time is 0.0165 am

The triple point of a substance is the temperature and pressure at which a substance can exist in equilibrium in the liquid, solid, and gaseous states.

Different substances have different triples points.

The triple point of pure water is at 0.01°C and 4.58 mmHg.

The triple point of sulfur dioxide is 197.64 K and 0.0165 atm.

Therefore, the pressure in atm at which the solid, liquid, and gas phases of SO₂ can coexist at the same time is 0.0165 am

In conclusion, the triple point of substance varies.

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Answer:

Explanation:

The direct reaction of a carboxylic acid with an amine would be expected to be difficult because the basic amine would deprotonate the carboxylic acid to form a highly unreactive carboxylate.

1) List the known and unknown quantities.

Sample: gas.

Volume: 500 mL.

Pressure: 740 mmHg

Temperature: 25 ºC.

Vapor pressure at 25 ºC: 24 mmHg.

2) Pressure of the gas.

The pressure of the gas is 716 mmHg

3) Moles of gas

3.1- List the known quantities.

Volume: 500 mL.

Temperature: 25 ºC.

Pressure: 716 mmHg.

Ideal gas constant: 0.082057 L * atm * K^(-1) * mol^(-1).

3.2- Set the equation.

3.3- Convert the units of the volume, the temperature, and the pressure.

Volume.

1 L = 1000 mL

Temperature.

Pressure

1 atm = 760 mmHg

3.4- Plug in the know quantities in the ideal gas equation.

3.5- Solve for n (moles).

Divide both sides by (0.082057 L * atm * K^(-1) * mol^(-1)) * (298.15 K)

4) Dry volume at STP

STP conditions are

Temperature: 273 K

Pressure: 1 atm.

At STP conditions 1 mol of a gas occuppies 22.4 L. We can use this as a conversion factor.

1 mol gas = 22.4 L

The volume of the dry gas at STP is 0.432 L.

.

Answer:

1) List the known and unknown quantities.

Sample: gas.

Volume: 500 mL.

Pressure: 740 mmHg

Temperature: 25 ºC.

Vapor pressure at 25 ºC: 24 mmHg.

2) Pressure of the gas.

The pressure of the gas is 716 mmHg

3) Moles of gas

3.1- List the known quantities.

Volume: 500 mL.

Temperature: 25 ºC.

Pressure: 716 mmHg.

Ideal gas constant: 0.082057 L * atm * K^(-1) * mol^(-1).

3.2- Set the equation.

3.3- Convert the units of the volume, the temperature, and the pressure.

Volume.

1 L = 1000 mL

Temperature.

Pressure

1 atm = 760 mmHg

3.4- Plug in the know quantities in the ideal gas equation.

3.5- Solve for n (moles).

Divide both sides by (0.082057 L * atm * K^(-1) * mol^(-1)) * (298.15 K)

4) Dry volume at STP

STP conditions are

Temperature: 273 K

Pressure: 1 atm.

At STP conditions 1 mol of a gas occuppies 22.4 L. We can use this as a conversion factor.

1 mol gas = 22.4 L

The volume of the dry gas at STP is 0.432 L.

Explanation:

Answer:

Question are not clear

Answer:

0.075 mol/dm^3

Explanation:

Based on the given data, the relationship between rate and concentration is exponential.

A proposed rate law for the reaction based on the given data is:

Collision theory suggests that the rate of a chemical reaction is proportional to the frequency and energy of collisions between the reactant molecules.

As the concentration of iodate ions decreases, the frequency of collisions between reactant molecules decreases, which leads to a decrease in the rate of the reaction.

At higher temperatures, the kinetic energy of the reactant molecules increases, which increases the frequency and energy of collisions between reactant molecules.

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Answer:

The salt bridge serves to complete the electrical circuit in the galvanic cell. It is pertinent that the salt bridge ions are in high concentrations as this allows electron mobility and keeps each half cell electronically neutral. The diluted salt bridge wuld cause a buildup of positive charge in the anode and negative charge in the cathode and the electrode half reactions which either reduce or oxidise species would halt. Causing the cell to stop producing electronic energy, impedeing the proper functioning of the galvanic cell.

Answer:

rough surface

Explanation:

Diffuse reflection occurs when parallel light waves strike a rough surface

Answer:

Rippling fountain

Explanation:

The balanced chemical equation for the reaction is: Fe(s) + 2CuCl2(aq) → 2FeCl3(aq) + Cu(s)

The equation shows that one mole of solid iron reacts with two moles of aqueous copper(II) chloride to produce two moles of aqueous iron(III) chloride and one mole of solid copper.

To balance the equation, we need to ensure that the number of atoms of each element is the same on both sides of the equation. Here's how we balance the equation:

Fe(s) + 2CuCl2(aq) → 2FeCl3(aq) + Cu(s)

On the left-hand side, we have one iron atom (Fe) and two copper atoms (Cu). On the right-hand side, we have two iron atoms (Fe) and one copper atom (Cu). To balance the iron atoms, we add a coefficient of 2 in front of Fe(s) on the left-hand side:

2Fe(s) + 2CuCl2(aq) → 2FeCl3(aq) + Cu(s)

Now we have two iron atoms on both sides. However, we also have four chloride ions (Cl-) on the left-hand side and six chloride ions on the right-hand side. To balance the chloride ions, we add a coefficient of 3 in front of CuCl2(aq) on the left-hand side:

2Fe(s) + 3CuCl2(aq) → 2FeCl3(aq) + Cu(s)

Now we have two iron atoms, six chloride ions, two copper ions (Cu2+), and one copper atom on both sides. The equation is balanced!

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Answer:

Animals need food, water, shelter, and space to survive. Herbivores can live only where plant food is available. Carnivores can live only where they can catch their food. Omnivores can live in many places because they eat both plants and animals.

Answer:

thts the acidic presence

Explanation:

Answer:

6.9 hours

Explanation:

In order to solve this problem we'll convert 837 km to miles (another option would be to convert 75 mi/hr to km/hr). To make said conversion we'll use the given conversion factor:

Finally we calculate the time required to travel said distance at a constant speed of 75 mi/hr:

The amount of time it would take to travel 837 km is equal to 7 hours.

Given the following data:

To determine the amount of time it would take to travel 837 km:

First of all, we would convert the value of the distance in kilometers to miles as follows:

Conversion:

1.61 km = 1 mile

837 km = X mile.

Cross-multiplying, we have:

\(X=\frac{837}{1.61}\)

X = 519.88 miles.

Mathematically, time is given by this formula:

\(Time = \frac{distance}{speed}\)

Substituting the given parameters into the formula, we have;

\(Time = \frac{519.88}{75}\)

Time = 6.93 ≈ 7 hours.

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Answer:

I hope it will work dear,

Explanation:

by simple mathematical rule,

then we know at half life 50% decay occur hence we get

      2.  50% = T 1/2

solving the 2 equations by cross multiplication we will get,

  T 1/2= 7.96 hr

THANKS FOR ASKING QUESTION:

The question is incomplete, the complete question is:

A solution of permanganate is standardized by titration with oxalic acid. To react completely with 0.0018 mol of oxalic acid required 22.69 mL of permanganate solution. The unbalanced chemical equation for the reaction in acidic solution is:

\(MnO_4^-(aq)+H_2C_2O_4(aq)\stackrel{\mathrm{Acidic}}{\longrightarrow} Mn^{2+}(aq)+CO_2(g)\)

Determine the concentration of the permanganate solution in molarity.

Answer: The molarity of permanganate solution is 0.0317 M

Explanation:

The balanced chemical equation follows:

\(2MnO_4^-(aq)+6H^+(aq)+5H_2C_2O_4(aq)\stackrel{\mathrm{Acidic}}{\longrightarrow} 2Mn^{2+}(aq)+8H_2O(l)+10CO_2(g)\)

Given values:

Moles of oxalic acid = 0.0018 moles  

By the stoichiometry of the reaction:

If 5 moles of oxalic acid reacts with 2 moles of permanganate solution

So, 0.0018 moles of oxalic acid will react with = \(\frac{2}{5}\times 0.0018=0.00072mol\) of permanganate solution

The formula used to calculate molarity:

\(\text{Molarity of solution}=\frac{\text{Moles of solute}\times 1000}{ \text{Volume of solution (mL)}}\) .....(1)

Given values:

Moles of permanganate solution = 0.00072 moles

Volume of solution = 22.69 mL

Putting values in equation 1, we get:

\(\text{Molarity of permanganate solution}=\frac{0.00072\times 1000}{22.69}\\\\\text{Molarity of permanganate solution}=0.0317M\)

Hence, the molarity of permanganate solution is 0.0317 M

The concentration of the permanganate solution in molarity is 0.0317 M

We'll begin by calculating the number of mole of permanganate needed to react with 0.0018 mole of oxalic acid.

2MnO₄¯(aq) + 5H₂C₂O₄(aq) + 6H⁺(aq) —> 2Mn²⁺(s) + 10CO₂(g) + 8H₂O(l)

From the balanced equation above,

5 moles of H₂C₂O₄ reacted with 2 moles of MnO₄¯

Therefore,

0.0018 mole of H₂C₂O₄ will react with = (0.0018 × 2) / 5 = 0.00072 mole of MnO₄¯

Mole of MnO₄¯ = 0.00072 mole

Volume = 22.69 mL = 22.69 / 0.02269 L

Molarity = mole / Volume

Molarity of MnO₄¯ = 0.00072 / 0.02269

Therefore, the molarity of the permanganate solution is 0.0317 M

Complete question:

A solution of permanganate is standardized by titration with oxalic acid. To react completely with 0.0018 mol of oxalic acid required 22.69 mL of permanganate solution. The unbalanced chemical equation for the reaction in acidic solution is:

MnO₄¯(aq) + H₂C₂O₄(aq) —> Mn²⁺(s) + CO₂(g)

Determine the concentration of the permanganate solution in molarity.

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