Complete and balance each of the following equations for gas evolution reactions. hclo4(aq) k2co3(aq)→hclo4(aq) k2co3(aq)→ express your answer as a chemical equation. identify all of the phases in your answer.

The pH at the equivalence point of a titration depends on the acid-base reaction being performed. However, if the acid being titrated is a strong acid (such as HCl) and the base being used is a strong base (such as NaOH), the equivalence point will occur at a pH of 7, which is neutral.

At the equivalence point of a titration, the amount of acid and base in the solution is stoichiometrically balanced, meaning that all of the acid has reacted with an equal amount of base. If the acid and base being used are both strong, the resulting solution will be neutral, with a pH of 7.To determine the pH at the equivalence point for a different acid-base reaction, you would need to know the acid dissociation constant (Ka) of the acid being titrated and the pKa of the acid-base indicator being used. The pH at the equivalence point can then be calculated using the Henderson-Hasselbalch equation.

As for the second part of the question, the amount of base needed to reach the equivalence point depends on the concentration of the acid being titrated and the volume of the solution being titrated. Without this information, it is impossible to determine the amount of base needed in units of mL. Finally, the pKa for the acid can be calculated using the Henderson-Hasselbalch equation as well. However, without additional information about the acid being titrated, it is impossible to provide a numerical answer.

learn more about titration

https://brainly.com/question/15170788

#SPJ11

Our body goes to its second energy source by breaking down simple sugars called Monosaccharides.

Monosaccharides are also known as simple sugars. It is the simplest form of sugars that means they cannot be broken down by hydrolysis into simpler sugars. It is used as building blocks to form complex sugars.

Examples of Monosaccharides are Glucose, Fructose, Galactose etc.

The structure of Monosaccharides is (CH₂O)ₙ. It consist single unit chain. Monosaccharides used to store energy and produce energy.

Thus from the above conclusion we can say that Our body goes to its second energy source by breaking down simple sugars called Monosaccharides.

Learn more about Monosaccharides here: https://brainly.com/question/1768793

#SPJ4

Answer: The pressure in atmospheres is 0.674 in the container if the temperature remains constant.

Explanation:

Boyle's Law: This law states that pressure is inversely proportional to the volume of the gas at constant temperature and number of moles.

\(P\propto \frac{1}{V}\)     (At constant temperature and number of moles)

\(P_1V_1=P_2V_2\)  

where,

\(P_1\) = initial pressure of gas  = 205 kPa

\(P_2\) = final pressure of gas = ?

\(V_1\) = initial volume of gas  = 4.0 L

\(V_2\) = final volume of gas = 12000 ml = 12 L    (1L=1000ml)  

\(205\times 4.0=P_2\times 12\)  

\(P_2=68.3kPa=0.674atm\)        (1kPa=0.0098atm)

Therefore, the pressure in atmospheres is 0.674 in the container if the temperature remains constant.

Answer:

P2=68.33 mm Hg

Explanation:

P1V1=P2V2

PLUG IN

CONVERT mL TO L (12000mL=12L)

(205)(4)=(P2)(12)

DIVIDE BOTH SIDES BY 12

P2= 68.33 kPa

The hydrogen ion, H⁺ cannot be added to a hydronium ion, H₃O⁺ , because the hydronium ion already contains a hydrogen ion.

The ions H⁺ and H₃O⁺ are the hydrogen ion and the hydronium ion respectively.

The hydrogen ion, H⁺ is formed when a hydrogen atom loses an electron. The hydrogen ion is known as a proton.

It is produced by acids when they dissociate in solution.

The hydronium ion, H₃O⁺ is formed when a water molecule combines with a hydrogen ion.

Because a hydrogen ion cannot exist on its own in aqueous solutions, the hydronium ion is the proper representation of the hydrogen ion in aqueous solutions.

Hence, the hydrogen ion H⁺, and the hydronium ion, H₃O⁺ are used interchangeably to represent acids in solution.

Learn more about hydronium ions at: https://brainly.com/question/27586088

#SPJ1

Answer:

The answer is "10.2".

Explanation:

Please find the complete question in the attachment file.

Calculating  the pH after adding 180.0 mL of \(NaOH \ to\ H_2A\) acid:  

Get balance moles as follows:

\(\to H_2A + OH^{-} \rightleftharpoons HA^{-} +H_2O \\\\I(mol) \ \ \ \ \ 0.02 \ \ \ \ \ 0.036 \ \ \ \ \ 0 \\\\C(mol) \ \ \ \ \ -0.02 \ \ \ \ \ -0.02 \ \ \ \ \ + 0.02 \\\\E (mol) \ \ \ \ \ \approx 0 \ \ \ \ \ \approx 0.016 \ \ \ \ \ 0.02\\\\\)

In the second equilibrium:  

\(\to HA^{-} + OH^{-} \rightleftharpoons A^{2-} + H_2 O \\\\I(mol) \ \ \ \ \ 0.02 \ \ \ \ \ 0.016 \ \ \ \ \ 0 \\\\C(mol) \ \ \ \ \ -0.016 \ \ \ \ \ -0.016 \ \ \ \ \ + 0.016 \\\\E (mol) \ \ \ \ \ 0.004 \ \ \ \ \ \approx 0 \ \ \ \ \ 0.016\\\\\)

\(pH= pK_{a_2} + \log \frac{A^{2-}}{HA^{-}} \\\\\)

      \(= 9.60 + \log \frac{0.016}{0.004} \\\\ = 10.2\)

Answer: The actual name Teflon® is a brand/trademark name of the DuPont Corporation used

Explanation:

The correct answer to the first part of your question is option (c): Energy is released by water vapor as it condenses.

When water vapor condenses into liquid water, it undergoes a phase change from a gaseous state to a liquid state. During this phase change, energy is released in the form of latent heat. This release of energy occurs because the water molecules in the vapor phase are more energetic and have higher kinetic energy compared to the water molecules in the liquid phase.

To know more about latent heat

brainly.com/question/23976436

#SPJ11

Two form of isomer shown by Alanine amino acid is

                 a) L- alanine

                 b) D- alanine

Type of isomerism shown is Stereoisomers.

Amino acids are molecules that combine to form proteins. Amino acids and proteins are the constructing blocks of life. When proteins are digested or broken down, amino acids are left. The human body uses amino acids to make proteins to assist the body.

Amino acids are required for the synthesis of body protein and other important nitrogen-containing compounds, which include creatine, peptide hormones, and some neurotransmitters. Despite the fact that allowances are expressed as protein, a the organic requirement is for amino acids.

Learn more about Amino acids here:-https://brainly.com/question/2526971

#SPJ9

Answer:

Phycical science is the study of the body.

Explanation:

In the mass spectrum of pentane, the presence of a peak with m/z = 57 is most likely to the detection of a butyl radical cation.

Because all molecular ions fragment, a few compounds have mass spectra that lack a molecular ion peak. That is not a problem you will encounter at A'level. In the mass spectrum of pentane, for example, the heaviest ion has an m/z value of 72.

Lines with m/z values one or two lower than one of the simple lines, for example, are frequently caused by the loss of one or more hydrogen atoms during the fragmentation process. The base peak (the tallest peak and thus the most common fragment ion) is at m/z = 57 this time. This, however, is not produced by the same ion as the pentane m/z value peak.

Learn more about the fragmentation process here:-

https://brainly.com/question/26260432

#SPJ4

The masses of each of the substances after the reaction is;

Let us recall that the limiting reactant is the reactant that is present in the least amount that is possible. This implies that  once the limiting reactant is exhausted, then the reaction would have to come to a stop.

Now;

Number of moles of iron III oxide = 960 g/160 g/mol = 6 moles

Number of moles of CO = 420 g/28 g/mol = 15 moles

Now;

1 mole of iron III oxide reacts with 3 moles of CO

x moles of iron III oxide reacts with 15 moles of CO

x = 1 mole * 15 moles / 3 moles

= 5 moles

Hence iron III oxide is the excess reactant

It the follows that;

Mass of iron;

If 3 moles of CO produced 2 moles of Fe

15 moles of Co would produce 15 moles * 2 moles /3 moles = 10 moles

Mass of Fe = 10 moles * 56 g/mol = 560 g

Mass of carbon dioxide

3 moles of CO produced 3 moles of carbon dioxide

Mass of carbo dioxide =  15 moles * 44  g/mol = 660 g

Mass of iron III oxide left over;

1 mole * 160 g/mol = 160 g

Learn more about stoichiometry:https://brainly.com/question/9743981

#SPJ1

Answer:

0.22 moles of air we carry inside our lungs.

Explanation:

An ideal gas is a theoretical gas that is considered to be composed of point particles that move randomly and do not interact with each other. Gases in general are ideal when they are at high temperatures and low pressures.

The gas laws are a set of chemical and physical laws that allow determining the behavior of gases in a closed system. The parameters evaluated in these laws are pressure, volume, temperature and moles.

The ideal gas law is an equation that relates the variables pressure P, temperature T and volume V if the amount of substance, number of moles n, remains constant and where R is the molar constant of the gases as follows:

P * V = n * R * T

In this case:

Replacing:

0.98 atm* 5.8 L= n* 0.082 \(\frac{atm*L}{mol*K}\) * 310 K

Solving:

\(n=\frac{0.98 atm* 5.8 L}{0.082 \frac{atm*L}{mol*K} *310 K}\)

n= 0.22 moles

0.22 moles of air we carry inside our lungs.

Answer:

This question is incomplete because of the absence of the diagram

Explanation:

The absence of the diagram makes the question incomplete, but it appears as if the content of the diagram has been described in the question (which is not totally clear).

The description provided in the question suggests the loss of a water during the formation of a triglyceride. This process described here is called dehydration synthesis. Dehydration synthesis is the process of joining two substances/compounds together leading to the loss of water molecule in the process.

From the explanation above, the correct option is 2. The fat molecule being formed is the triglyceride (through the process of dehydration synthesis).

Phosphorus, which has the atomic number 15 and is located in period 3 and group 15 of the periodic table.

An alcohol barometer would have a higher column height when compared to a mercury barometer. If the Magdeburg hemispheres were 2 km above the sea, it would be simpler to separate them. Two pistons make up a hydraulic device, one with a tiny cross-section area and the other with a larger cross-section area.

Barometric pressure, commonly known as air pressure or atmospheric pressure, is measured by a device called a mercury barometer using the various physical properties of mercury contained in a tube. Barometers are helpful instruments for weather forecasting since they can be used to predict impending changes in the weather. For instance, when the barometric pressure falls, it may indicate the impending arrival of storms, rain, or wind. On the other side, a rise in atmospheric pressure could suggest that dry, fair weather may start to develop soon. There is no assurance that the weather will behave as predicted, despite the fact that barometer reading interpretation is a fairly precise science.

Learn more about mercury barometer here:-

https://brainly.com/question/16982367

#SPJ4

\(\huge \text{$\boxed{\boxed{\rm KNO_3}}$}\)

Empirical formula is the chemical formula of a compound where its constituent elements are in the simplest mole ratio.

To determine a compound's empirical formula, we must first calculate the number of moles of each element.

However to do this, we require the mass in grams. From the percentage compositions, we can say, "let the mass of the compound be 100 grams."

\(\large \textsf{$\therefore $ There is 38.7 g of potassium, 13.9 g of nitrogen, and 47.4 g}\\ \large \textsf{\ \ \ \,of oxygen in 100 g of compound.}\)

To find the number of moles of each element (with symbol n ), we can divide the mass of each element (in grams, with symbol m ), by the molar mass of each element (in g/mol, with symbol M ), which can be found on an international standard IUPAC Periodic Table.

\(\boxed{\begin{tabular}{c}\Large\text{$\therefore$ number of moles = $\frac{\rm mass\ present}{\rm molar\ mass}$} \\\\ \huge\textsf{$\Rightarrow n=\frac{m}{M}$ }\\\end{tabular}}\)

Therefore, applying this formula to all of the elements in the compound:

\(\large \textsf{$n(\rm K) = \frac{38.7}{39.10}$}\\\\\large \textsf{$\phantom{n(\rm K)}=0.9898\ \rm mol$}\\\large \textsf{$n(\rm N) = \frac{13.9}{14.01}$}\\\\\large \textsf{$\phantom{n(\rm N)}=0.9921\ \rm mol$}\\\\\large \textsf{$n(\rm O) = \frac{47.4}{16.00}$}\\\\\large \textsf{$\phantom{n(\rm O)}=2.963\ \rm mol$}\)

∴ The ratio of K : N : O = 0.9898 : 0.9921 : 2.963. Simplifying this ratio by dividing all parts by 0.9898, will give us:

\(\large \text{1.000 : 1.002 : 2.994}\\\\\large \text{$\implies$ 1 : 1 : 3}\)

Hence, inputting these values as the subscripts of each elemental symbol in the formula, the empirical formula is thus:

\(\Large \text{$\boxed{\boxed{\implies \rm KNO_3}}$}\)

Note: the compound found, is a common ionic compound known as potassium nitrate.

To learn more about the empirical formula:

brainly.com/question/14044066

Answer:

\(\qquad\qquad\huge\boxed{\boxed{\rm{\:\:KNO_3\:\:}}}\)

- An empirical formula is the simplest whole number ratio of atoms in a compound. It gives the relative number of atoms of each element in the compound. For example, the empirical formula of glucose is \(\rm{CH_2O}\) which means that there are two hydrogen atoms for each carbon atom and one oxygen atom. Empirical formulas are often used in chemistry to represent the composition of compounds.

To determine the empirical formula, we need to find the smallest whole-number ratio of atoms in the compound. Here are the steps to follow:

Step 1: Convert the percentages to grams.

Step 2: Convert the grams of each element to moles using their atomic masses.

\(\large\rm{K:\:\:\: \dfrac{38.7\: g}{39.10\: g/mol} = 0.990\: mol}\)

\(\large\rm{N:\:\:\: \dfrac{13.9\: g}{14.01\: g/mol} = 0.992\: mol}\)

\(\large\rm{O:\:\:\: \dfrac{47.4\: g}{15.99\: g/mol} = 2.962\: mol}\)

Step 3: Divide each mole value by the smallest number of moles.

\(\qquad\large\rm\implies{\dfrac{0.990 mol}{0.990 mol} = 1}\)

\(\qquad\large\rm\implies{\dfrac{0.992 mol}{0.990 mol} = 1.002}\)

\(\qquad\large\rm\implies{\dfrac{2.962 mol}{0.990 mol} = 2.999}\)

Steo 4: Round the resulting values to the nearest whole number.

\(\qquad\qquad\huge\boxed{\rm{\:\:1 : 1 : 3\:\:}}\)

Therefore, the empirical formula of the compound is:

\(\qquad\qquad\huge\boxed{\boxed{\rm{\:\:KNO_3\:\:}}}\)

Learn more about empirical formula here:

https://brainly.com/question/14425592

Answer:

To make sure all the sulphuric acid has been used up

The molar mass of CCl₄ is 154 g/mol

Molar mass is the mass in grams of one mole of a substance and is given by the unit g/mol.

It is calculated by taking the sum of atomic masses of all the elements present in the given formula.

A mole is defined as the amount of substance containing the same number of atoms, molecules, ions, etc. as the number of atoms in a sample of pure 12C weighing exactly 12 g.

Atomic mass of C = 12

Atomic mass of Cl = 35.5

Molar mass = 12 + (35.5 × 4)

= 154 g/mol

Learn more about Molar mass, here:

https://brainly.com/question/12127540

#SPJ1

Answer:

3 electrons

Explanation:

Nitrate needs 3 electrons to achieve a stable electron configuration

Three is the answer. it needs three to complete its shell

Answer:

10000 g BaNO₃

General Formulas and Concepts:

Chemistry - Atomic Structure

Explanation:

Step 1: Define

3.02 × 10²⁵ formulas units BaNO₃

Step 2: Identify Conversions

Avogadro's Number

Molar Mass of Ba - 137.33 g/mol

Molar Mass of N - 14.01 g/mol

Molar Mass of O - 16.00 g/mol

Molar Mass of BaNO₃ - 137.33 + 14.01 + 3(16.00) = 199.34 g/mol

Step 3: Convert

\(3.02 \cdot 10^{25} \ formula \ units \ BaNO_3(\frac{1 \ mol \ BaNO_3}{6.022 \cdot 10^{23} \ formula \ units \ BaNO_3} )(\frac{199.34 \ g \ BaNO_3}{1 \ mol \ BaNO_3} )\) = 9996.79 g BaNO₃

Step 4: Check

We are given 3 sig figs. Follow sig fig rules and round.

9996.79 g BaNO₃ ≈ 10000 g BaNO₃

The units of measurement that can be used for precipitation with mm or inches is precipitation, and air temperature.

The Temperature is known to be how hot or cold the air or atmosphere is. It is often measured by the used of a thermometer (in Celsius (C) or Fahrenheit (F), or Kelvin (K) ).

The unit of measurement for precipitation is said to be in millimeters. The unit is known to be in linear depth, that is in millimeters (for volume/area), or in kg m–2 (for the mass/ area).

See full question below

A is air pressure and is a temperature

O A is humidity and precipitation

O A is precipitation, and B is air temperature

O A is wind speed, and B is humidity

Learn more about precipitation from

https://brainly.com/question/866725

The mass of oxygen is needed to react with 1.39 gal of methanol  is 6266.4g

Given:

methanol = 1.39 gal = 1.39 *3.79 =5.2681 L=5268.1 mL

density of methanol is 0.793 g/mL

weight of methanol = 0.793 * 5268.1 =4177.6 g

From the Balance Equation we know that 2 mole of methanol react with 3 mole of oxygen

since

mass of oxygen is needed to react = 4177.6/2 * 3 =6266.4g

complete Que :

What mass of oxygen is needed to react with 1.39 gal of methanol according to the balanced equation below? (1.00 gal - 3.79 L, and the density of methanol is 0.793 g/mL.) 2 CH2OH(1) + 3 02(g) 2 C02(%) + 4H2O

To learn more about mole refer,

https://brainly.com/question/15356425

#SPJ4

To calculate the number of equivalents of Mg2+ in a solution, we need to divide the number of moles by 2, as each mole of Mg2+ contains 2 equivalents. In this case, the solution containing 2.50 mol of Mg2+ has 1.25 equivalents of Mg2+.

To answer this question, we need to know the definition of an equivalent. An equivalent is the amount of a substance that can combine with or replace one mole of hydrogen ions in an acid-base reaction. In the case of Mg2+, it can replace two hydrogen ions, so one equivalent of Mg2+ is equal to half a mole of Mg2+.
Given that the solution contains 2.50 mol of Mg2+, we can calculate the number of equivalents by dividing the number of moles by 2. This is because each mole of Mg2+ contains 2 equivalents, as we discussed earlier.
2.50 mol Mg2+ / 2 = 1.25 equivalents of Mg2+
Therefore, the solution that contains 2.50 mol of Mg2+ has 1.25 equivalents of Mg2+.

To know more about equivalents visit:

https://brainly.com/question/22081358

#SPJ11

Option 2) Bromoethane and methanol is correct

The major products obtained upon treatment of ethyl methyl ether with excess HBr are Bromoethane and methanol.

What is ethyl methyl ether?

Ethyl methyl ether is a colorless gas that is used as a solvent. The IUPAC name for this compound is methoxyethane. It is a member of the ether family of compounds. When ethyl methyl ether reacts with excess HBr, it undergoes a substitution reaction and forms Bromoethane and methanol. The mechanism for this reaction is given below: Methoxyethane reacts with hydrogen bromide to produce methanol and ethyl bromide (bromoethane). Here are the products that are formed in this reaction: Bromoethane (C2H5Br) and Methanol (CH3OH)

The chemical equation for this reaction can be written as: CH3OCH2CH3 + HBr → CH3OH + CH3CH2Br \(\boxed{Option\ 2)}\)

Learn more about ethyl methyl ether

https://brainly.com/question/31388194

#SPJ11

Answer: Ik its too late but the answer is yeast.

Explanation: Sugar is yeasts food. If you mix sugar with yeast, and put it in something such as bread, a bottle with a balloon over it, or etc. It will cause it to rise.

Answer:

A. The chemical changes occurred because the chemicals changed.

Explanation:

When baking a cake several chemical reactions occur that change the chemical composition of the ingredients used in baking. An ingredient like baking powder releases carbon dioxide when it undergoes a temperature change in the oven. A chemical change is supposed to change the form of a substance.

An endothermic reaction also occurs when the ingredients absorb heat energy to produce several changes. The firmness of the cake occurs because of the heat absorbed by the proteinous content of the egg.

Answer:

fluorine (f) lies in group 17 and 2 period

Answer:

Explanation:

Answer: fluorine (f) lies in group 17 and 2 period

Answer: I believe it would be B. Genus

Explanation:

I looked up the definitions for you and genus is defined as the group above species. Picture of definition attached.