What is the pH of a 3.5 x 10-5 M solution of HCl?

Answer:

2.13 M

Explanation:

To solve this problem we need to keep in mind the definition of molarity:

As the problem gives us both the number of moles and the volume of solution, we can proceed to calculate the molarity:

The answer is 2.13 M.

Answer: Bullying is not good!

Answer:

0.011 moles

Explanation:

Applying,

PV = nRT.................... Equation 1

Where P = Pressure, V = Volume, n = number of moles, R = Molar gas constant, T = Temperature.

Make n the subject of the equation

n = PV/RT.................. Equation 2

From the question,

Given: P = 105 kPa = (105×0.00986923) = 1.036 atm, V = 250 mL = 0.25 L, T = 23 °C = (273+23) = 296 °C

Constant: R = 0.082 atm.dm³/K.mol

Substitute these values into equation 2

n = (1.036×0.25)/(0.082×296)

n = 0.011 moles

Answer: It’s correct because it’s showing an exothermic reaction. x is the reactants and y is the products.

Explanation: -ΔH means the reaction is exothermic and releasing heat. This lowers the potential energy.

Answer:

answer above is correct

Explanation:

Answer:

108 g

Explanation:

First we convert 6.00 moles of H₂ into moles of H₂O, using the stoichiometric coefficients of the reaction:

Then we can convert 6.00 moles of H₂O into grams, using the molar mass of water:

The answer is 108 grams of water.

Answer:

Charles's law states that the volume of a given amount of gas is directly proportional to its temperature on the kelvin scale when the pressure is held constant

The volume of a given gas sample is directly proportional to its absolute temperature at constant pressure (Charles's law). The volume of a given amount of gas is inversely proportional to its pressure when temperature is held constant (Boyle's law)

Explanation:

~Hope this helps

Answer:

tic

Explanation:

because it is my answer okay

Answer:

Vapor pressure is defined as the pressure exerted by a vapor in thermodynamic equilibrium with its condensed phases (solid or liquid) at a given temperature in a closed system.

Explanation:

Answer:

Strong Base

Explanation:

sodiumtrioxocarbonate(IV) Na2CO3 exists in various forms such as; an anhydrous form or in a crystalline form. Usually, the manufacturing process of sodiumtrioxocarbonate(IV) Na2CO3 is known as the Solvay process.

Now, upon reaction, Na2CO3 reacts to yield CO⁻₃. That appears to be a conjugate base of a weak acid. Thus, the occurrence of the removal of H⁺ resultt into Carbonic acid, i.e. a Strong Base.

The complete question is shown in the image attached to this answer.

Answer:

C

Explanation:

Let us quickly remember that the EMF of a cell under non standard conditions in given by the Nernst equation.

This equation states that;

E = E°cell - 0.592/n log Q

Where

E = EMF under non standard conditions

E°cell= standard EMF of the cell

n = number of electrons transferred

Q = reaction quotient

If the reaction quotient is greater than 1 then cell potential is less than the standard cell potential.

The cell that generates the lowest cell potential is the cell depicted in option C because Q has the greatest positive value(Q<1).

The cell potential is the redox potential that measures the acquired to lost electrons at the electrodes. The lowest cell potential is generated by cell C with 0.5 M.

EMF is the electromotive force that is the total of the electric potential difference produced at the half cells of the galvanic cell (electrochemical cell).  

EMF of the cell is given as,

[tex]\rm E = \rm E^{\circ} - \dfrac{0.592}{n}\; log Q[/tex]

Here, E is the electromotive force, [tex]\rm E^{\circ}[/tex] is the standard EMF, n is the number of the transferred electrons, and Q is the reaction quotient.

When the reaction quotient (Q) is greater than 1 then, cell potential will be less than standard cell potential.

Therefore, cell C with 0.5 M and Q > 1 is a similar cell.

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Answer:

amine

Explanation:

We have to bear in mind that amines are basic compounds. This idea will be very important in attempting to answer this question.

So, when she adds 5% HCl solution in order to extract the organic layer, the amine forms a hydrochloride salt which is contained in the aqueous layer.

The addition of a base such as NaOH leads to the formation of a white precipitate of the amine.

Answer: A volume of 2997 liters of fluorine gas is needed to form 999 L of sulfur hexafluoride gas if the given reaction takes place at 2.00 atm and 273.15 K.

Explanation:

The given reaction is as follows.

[tex]S(s) + 3F_{2}(g) \rightarrow SF_{6}(g)[/tex]

This show that 3 moles of fluorine is reacting to give 1 moles of sulfur hexafluoride.

According to the ideal gas formula,

PV = nRT

This means that volume of a gas is directly proportional to the number of moles. Hence, volume of fluorine required is calculated as follows.

[tex]3 \times 999 L\\= 2997 L[/tex]

Thus, we can conclude that a volume of 2997 liters of fluorine gas is needed to form 999 L of sulfur hexafluoride gas if the given reaction takes place at 2.00 atm and 273.15 K.

Answer:

6

Explanation:

C[tex]_6[/tex]H[tex]_{12}[/tex] + O[tex]_2[/tex] → CO[tex]_2[/tex] +H[tex]_2[/tex]O + heat can be balanced as C[tex]_6[/tex]H[tex]_{12}[/tex] + 6O[tex]_2[/tex] → 6CO[tex]_2[/tex] +6 H[tex]_2[/tex]O + heat. Therefore, the correct option is option C.

Combustion is a chemical reaction that often involves the presence of oxygen and produces light and heat within the form of flames. Because of the physical characteristics of the chemical process and the fact that more energy is produced than can be released through the surrounding medium, the rate or speed with which the substances that react combine is high. As a result, the ambient temperature about the reactants is increased, accelerating the reaction even further.

A lit match is a common illustration of a combustion reaction. A flame is produced when a match strikes something because friction warms the head of the match to a temperature where the chemicals respond by creating additional heat than can be released into the atmosphere. C[tex]_6[/tex]H[tex]_{12}[/tex] + O[tex]_2[/tex] → CO[tex]_2[/tex] +H[tex]_2[/tex]O + heat can be balanced as C[tex]_6[/tex]H[tex]_{12}[/tex] + 6O[tex]_2[/tex] → 6CO[tex]_2[/tex] +6 H[tex]_2[/tex]O + heat

Therefore, the correct option is option C.

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Answer:

The molecular formula for Potassium Carbonate is K2CO3. The SI base unit for amount of substance is the mole. 1 grams Potassium Carbonate is equal to 0.0072356020563581 mole. Note that rounding errors may occur, so always check the results.

Explanation:

The molecular formula for Potassium Carbonate is K2CO3. The SI base unit for amount of substance is the mole. 1 grams Potassium Carbonate is equal to 0.0072356020563581 mole.

Answer:

Explanation:

Well you didn’t send a picture of the question but h2O is water so. If the questions answer has a option of water then pick that one

Answer:

Thermal Conductor

Explanation:

Answer:

B 1.17

Explanation:

There is .02 mols of nacl in a .4M solution

so you multiply by the molar weight of NaCl (58.44)

The elemental particles like the atoms, molecules and compounds present in a given substance is called an Avogadro's number. This number is expressed as [tex]N_{A}[/tex] and is equal to [tex]6.022 \times 10^{23} \;\rm mol^{-1}[/tex].

[tex]8.06 \times 10 ^{23}[/tex] molecules are present in 135 g of Teflon [tex]\rm C_{2}F_{4}[/tex].

Given,

We have 135 g, so moles will be:

[tex]\begin{aligned}\rm Moles (n) &=\dfrac{ \rm Mass }{\;\rm Molar \;\rm mass}\\\\\rm n &= \dfrac{135 \rm g }{100.02 \rm g/mol} \\\\\rm n &= 1.34 \;\rm mole\end{aligned}[/tex]

Hence,

1 mole contains [tex]6.022140857 \times 10^{23}[/tex] (Avogadro's number)

So 1.34 moles will contain,

[tex]\begin{aligned}&=1.34 \times 6.022140857 \times 10^{23}\\\\&= 8.06 \times 10 ^{23}\;\rm molecules\end{aligned}[/tex]

Therefore, [tex]8.06 \times 10 ^{23}[/tex] molecules are present in 135 g of Teflon [tex]\rm C_{2}F_{4}[/tex].

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Answer:

The difference in the properties of water can be attributed to physical changes to the hydrogen and oxygen atoms on a subatomic level. The properties of the gases are combined to give water its properties. When substances chemically combine, products with completely different properties form.

Answer:

They are composed of different atoms

Explanation:

The guy above me said it better :|

Answer:

The Milky Way

Explanation:

Answer:

Your answer is the Milky WAy!

Brainliest?

Answer:

Potassium phosphide (K3P)

Explanation:

sodium has a positive charge and chlorine has a negative charge a negative and a positive charge you automatically for an ionic bond therefore the chlorine has to have a negative one charge

Answer:

Two types of reaction

Explanation:

Alkanes undergo only substitution reactions but alkenes and alkynes undergo both substitution and addition reactions

Answer:

d

Explanation:

i just did it

The  functional group in the following molecule CH₃CH₂OCH₂CH₃ is ether.

Functional group is defined as a substituent or group of atoms or an atom which causes chemical reactions.Each functional group will react similarly regardless to the parent carbon chain to which it is attached.This helps in prediction of chemical reactions.

The reactivity of functional group can be enhanced by making modifications in the functional group .Atoms present in functional groups are linked to each other by means of covalent bonds.They are named along with organic compounds according to IUPAC nomenclature.

Functional group inter conversion is also possible by retro -synthesis.In some cases , functional groups can be charged molecules.

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Answer:

Explanation:

The atomic number of uranium (see periodic table) is 92, and the mass number of the isotope is given as 238. Therefore, it has 92 protons, 92 electrons, and 238 — 92 : 146 neutrons

Uranium has an atomic number of 92. There are 146 neutrons, 92 protons, and 92 electrons in 238U+5. The number of neutrons can vary from 141 to 146.

Chemical element uranium has the atomic number 92 and the letter U. It is an actinide metal in the periodic table's silvery-gray series. There are 92 protons and 92 electrons in an atom of uranium, of which 6 are valence electrons.

Since uranium has an atomic number of 92, its atomic structure consists of 92 protons and 92 electrons. The nucleus of U-238 contains 146 neutrons, but this number can range from 141 to 146.

With 92 protons and 146 neutrons, Uranium-238 is the heaviest element in nature. The overall mass and charge of the nucleus are 238 nucleons, or +92.

Thus, Uranium has an atomic number of 92. There are 146 neutrons, 92 protons, and 92 electrons in 238U+5.

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Explanation:

Ionic product of water, Kw

[tex]Kw = [OH {}^{ - } ][H _{3} O {}^{ + } ] \\ 1.0 \times {10}^{ - 14} = (1 \times {10}^{ - 11} )[H _{3} O {}^{ + } ] \\ [H _{3} O {}^{ + } ] = \frac{(1.0 \times {10}^{ - 14}) }{(1 \times 10 {}^{ - 11}) } \\ ][H _{3} O {}^{ + } ] = 0.001 \: M[/tex]