A cylinder containing carbon dioxide of volume 20L at 2.0 atm was connected to another cylinder of certain volume at constant temperature. The final pressure of the gas in the cylinders was found to be 380 mm Hg. Calculate the volume of the second cylinder.

To solve this problem is not necessary to have the chemical reaction. Just use the formula of Molarity and solve it for moles.

moles = 0.2 x 0.025=0.005.

The complete question is:

NaOH (aq) + HCl(aq) H2O + NaCl (aq)

If 25.0 mL of a 0.2 M NaOH solution is used for the reaction

shown above, how many moles of NaOH were involved in the

reaction? _moles.

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The number of moles for the chemical reaction will be equal to 0.005, if 25.0 ml of a 2.0 m NaOH solution are used.

The amount of a material is expressed in moles, which are represented by the symbol mol in the International System of Units. A substance's amount is a measurement of how many of its fundamental components are present in an object or sample. To define a mole, precisely 6.022140761023, elementary components are needed.

The term "mole" (symbol: mol) refers to the amount of matter in a system that contains the same number of atoms as there are in 0.012 kilograms of carbon 12. Previously, a mole was determined through experimentation to be the number of atoms present in 12 grammes of carbon-12.

moles = 0.2 x 0.025=0.005.

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The complete question is:

NaOH (aq) + HCl(aq) H2O + NaCl (aq)

If 25.0 mL of a 0.2 M NaOH solution is used for the reaction

shown above, how many moles of NaOH were involved in the

reaction? _moles.

The equilibrium concentration of A, B and C are 0.02 M, 2.38 M and 3.04 M respectively.

When the products and reactants do not alter over time, we say that a chemical is in equilibrium concentration.

In other words, a chemical reaction enters a state of equilibrium or equilibrium concentration when the rate of the forward reaction equals the rate of backward reaction.

We are given:

Concentration = Number of moles/ Volume

So, the concentration of A is 2.30M

The concentration of B is 3.90M

If we factor in the chemical equation given: 3A(g) + 2B(g) ---> 4C(g)

Initial:          2.30       3.90

At eqllm:   2.30-3x   3.90-2x    4x

After solving, we would get that the equilibrium concentration of A, B and C are 0.02 M, 2.38 M and 3.04 M respectively.

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Option (c) is correct. The number of neutrons will not be find in the periodic table.

Periodic table is the arrangement of chemical elements. Chemical elements are arranged in rows that is called periods and columns that is called groups according to increasing atomic number. Scientists use the periodic table to refer to information about an element like atomic mass and chemical symbol. The periodic table’s arrangement also allows to discern trends in element properties including electronegativity, ionization energy, and atomic radius. We can find the name of the element, symbol, atomic weight of the element, atomic number. We can not find the number of neutrons in the periodic table. the properties of the chemical elements exhibit an approximate periodic dependence on their atomic numbers.

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There will be 1.084×10²¹ formula units are left un-reacted.

A formula unit is the part of an ionic compound's chemical formula that lists the ions in the smallest ratio necessary to produce a neutral electrical charge. In chemistry, we utilize chemical formulae to explain the constituent parts or molecules of a substance.

Given, initial amount of CuSO4 = 0.0850 mole

amount of CuSO4 consumed in reaction = 0.0832 mole

remaining amount of CuSO4 = 0.0850 - 0.0832 = 0.0018 mole

now, 0.0018 mole CuSO4 × (6.02×10²³ f. u./1 mole) = 1.084×10²¹ f. u.

There will be 1.084×10²¹ formula units are left un-reacted.

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If the reaction uses up 0.0832 mol copper sulfate there will be 1.084×10²¹ formula units are left un-reacted.

A formula unit is the part of an ionic compound's chemical formula that lists the ions in the smallest ratio necessary to produce a neutral electrical charge. In chemistry, we utilize chemical formulae to explain the constituent parts or molecules of a substance.

Given, initial amount of CuSO4 = 0.0850 mole

amount of CuSO4 consumed in reaction = 0.0832 mole

remaining amount of CuSO4 = 0.0850 - 0.0832 = 0.0018 mole

now, 0.0018 mole CuSO4 × (6.02×10²³ f. u./1 mole) = 1.084×10²¹ f. u.

There will be 1.084×10²¹ formula units are left un-reacted.

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Organofluorines are organic molecules that include the greenhouse gas link. Foxine behavior discusses the composition of these chemicals.

Old paper documents like books, postage stamps, and awards can develop spots and discoloration due to foxing, a time of life process of degeneration. The stains' fox - like reddish-brown hue or the potential participation of the rusting chemical ferric oxide may be the sources of the term.

On old paper documents like books, postage stamps, old banknotes, and certificates, circa survive age-related process of weakening spots and browning. The stains' fox - like reddish-brown hue or the suspected participation of the rust ingredient ferric oxide may be the origin of the term.

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A liquid at 50 degrees Celsius would have a melting point of 50 degrees Celsius and a boiling point of approximately 173.15 degrees Celsius.

What is the liquid?

iquid is a state of matter that has a definite volume, but does not have a fixed shape. It is one of the four fundamental states of matter, along with solid, gas, and plasma. Liquids tend to have a greater volume than solids, but geneLrally take the shape of their container. Examples of liquids include water, milk, blood, gasoline, and oil. Liquids are composed of molecules that tend to have greater mobility and can easily flow past each other. Depending on the temperature, pressure, and composition of the liquid, it can undergo changes in the state of matter.

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In 1928, Sir Alexander Fleming was studying Staphylococcus bacteria growing in culture dishes. Bacterial infections are treated with penicillins

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Answer:

A Is the correct answer..

The amino acid sequence will be determined by the codons in the mRNA sequence that is being translated.

During translation, the mRNA sequence is read three nucleotides at a time, and each codon is translated into an amino acid based on the genetic code. This process is known as the "triplet code" because codons are made of three nucleotides.

The ribosome reads the mRNA sequence and translates it into a protein by recruiting amino acids in the correct order. The tRNA molecules carry the correct amino acids to the ribosome, where they are added to the growing polypeptide chain.

The ribosome continues to read the mRNA sequence until it reaches a stop codon, which signals the end of the translation and the completion of the amino acid sequence.

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A stopped car begins to accelerate at 2 m/s2 and continues this acceleration for 7 seconds, so its speed will be 14 m/s when it finishes accelerating, so the car's final speed is 14 m/s.

The speed of an object, such as a car, determines its velocity, and more importantly, the faster the speed, the faster the car arrives at its destination point, the calculation is shown below.

v = at + v₀,  (a= acceleration, v₀= initial velocity, t= time)

v= 2m/[tex]{s}^2[/tex] × 7 sec + 0 m/s

v= 14 m/s

Hence, a stopped car begins to accelerate at 2 m/s2 and continues this acceleration for 7 seconds, so its speed will be 14 m/s when it finishes accelerating, so the car's final speed is 14 m/s.

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The three industries that require batteries are the;

We know that batteries are pieces of hardware that are used to convert chemical energy into electrical energy. The chemical energy is stored in the battery. This energy can now be released by the use of some kind of electro chemical reactions.

Now, we should know that some industries tend to be more reliant on the use of battery technology than the other industries and there could be a lot of reasons for this.

For instance, in the medical sector, batteries are used to power a ,lot of gadgets that are used in medicine such as the pacemakers that can be able to serve as artificial hearts. In the electronic industries, the use of lithium ion batteries have become very common and they help in the production of gadgets. In the automotive sector, the batteries play a key role in the functioning of automobiles.

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Answer:

liquid carbon disulfide and oxygen gas produce carbon dioxide gas and sulfur dioxide gas

Explanation:

Answer: 0.31

Explanation:

molarity = 0.32 mol of solute / 1 L solution

find kg of solute: 0.32 mol of solute x 146.8 g/mol = 46.976 g = 0.046976 kg

find kg of solution: 1 L solution x (1000 mL / 1 L) x (1.08 g/mL) (1 kg / 1000 g) = 1.08 kg solution

find kg of solvent: 1.08 kg solution - 0.046976 kg solute =  1.033 kg water

molality = 0.32 mol solute / 1.033 kg water = 0.31 mol/kg

According to molar concentration , the molality of the solution upto second decimal place  is 0.31  m.

Molar concentration is defined as a measure by which concentration of chemical substances present in a solution are determined. It is defined in particular reference to solute concentration in a solution . Most commonly used unit for molar concentration is moles/liter.

The molar concentration depends on change in volume of the solution which is mainly due to thermal expansion.

molarity = 0.32 mol of solute / 1 L solution.To find kg of solute-0.32 mol of solute x 146.8 g/mol = 46.976 g = 0.046976 kg. To find kg of solution: 1 L solution x (1000 mL / 1 L) x (1.08 g/mL) (1 kg / 1000 g) = 1.08 kg solution. To find kg of solvent: 1.08 kg solution - 0.046976 kg solute =  1.033 kg water.

Thus, molality = 0.32 mol solute / 1.033 kg water = 0.31 mol/kg.

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The balanced chemical reaction of sodium and sulfur can best be described as: B. 2Na(s) + S(s) → Na₂S(s)

To represent the reaction between sodium and sulfur, we would express the elements and their states as shown above. So, 2 atoms of sodium would react with 1 atom of sulphur to yield a compund known as sodium sulphide.

This compound contains two atoms of sodium and 1 atom of sulphur. The physical state is solid. So, the correct option number that expresses this is B.

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The Equilibrium Constant Concentration of Fe(NO3)3 is Keq 2.79*10^2 and molar extinction coefficient is 4438 L/mol.

Slope of the above calibration curve represents molar extinction coefficient  in L/mol for Fe(SCN)2+.

Hence

= 4438 L/mol

B. Determination of K:

Test tube-2: A = 0.193

=> [Fe(SCN)2+]eq = A /

b = 0.193 / 4438 L/mol x 1 = 4.35x10-5 M 

[Fe3+]eq = 0.001 - 4.35x10-5 M = 9.565x10-4 M 

[SCN-]eq = 2.0x10-4 M - 4.35x10-5 M = 1.565x10-4 M

Keq = [Fe(SCN)2+]eq / ([Fe3+]eq x [SCN-]eq) 

=> Keq = 4.35x10-5 M / ( 9.565x10-4 Mx1.565x10-4 M) = 2.91x102 

Test tube-3: A = 0.331

=> [Fe(SCN)2+]eq = A /

b = 0.331 / 4438 L/mol x 1 = 7.46x10-5 M

[Fe3+]eq = 0.001 - 7.46x10-5 M = 9.254x10-4 M 

[SCN-]eq = 4.0x10-4 M - 7.46x10-5 M = 3.254x10-4 M

Keq = [Fe(SCN)2+]eq / ([Fe3+]eq x [SCN-]eq) 

=> Keq = 7.46x10-5 M / (9.254x10-4 Mx3.254x10-4 M) = 2.48x102 

Test tube-4: A = 0.512

=> [Fe(SCN)2+]eq = A /

b = 0.512 / 4438 L/mol x 1 = 1.15x10-4 M

[Fe3+]eq = 0.001 - 1.15x10-4 M = 8.85x10-4 M 

[SCN-]eq = 6.0x10-4 M - 1.15x10-4 M = 4.5x10-4 M

Keq = [Fe(SCN)2+]eq / ([Fe3+]eq x [SCN-]eq) 

=> Keq = 1.15x10-4 M / (8.85x10-4 Mx4.5x10-4 M) = 2.89x102 

Test tube-5: A = 0.634

=> [Fe(SCN)2+]eq = A

b = 0.634 / 4438 L/mol x 1 = 1.43x10-4 M

[Fe3+]eq = 0.001 - 1.43x10-4 M = 8.57x10-4 M 

[SCN-]eq = 8.0x10-4 M - 1.43x10-4 M = 6.57x10-4 M

Keq = [Fe(SCN)2+]eq / ([Fe3+]eq x [SCN-]eq) 

=> Keq = 1.43x10-4 M / (8.57x10-4 Mx6.57x10-4 M) = 2.54x102 

Test tube-6: A = 0.890

=> [Fe(SCN)2+]eq = A /



b = 0.890 / 4438 L/mol x 1 = 2.01x10-4 M  

[Fe3+]eq = 0.001 - 2.01x10-4 M = 7.99x10-4 M 

[SCN-]eq = 0.001 M - 2.01x10-4 M = 7.995x10-4 M

Keq = [Fe(SCN)2+]eq / ([Fe3+]eq x [SCN-]eq) 

=> Keq = 2.01x10-4 M / (7.99x10-4 Mx7.99x10-4 M) = 3.15x102 

Average Keq

= (2.91x102 +2.48x102 +2.89x102 +2.54x102 +3.15x102 ) / 5

=  2.79x102 

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The four types of verbal irony are verbal irony, sarcasm, innuendo, and hyperbole.

Verbal irony is the intentional use of words to express something different from what is said. It is a figure of speech often used for comedic effect, to emphasize a point or to add emphasis.

Sarcasm is a type of verbal irony that is used to mock, ridicule, or criticize someone. Innuendo is a type of verbal irony that implies a hidden meaning or suggests something without directly saying it.

Finally, hyperbole is an exaggerated statement used in an attempt to make a point or to emphasize something. All four types of verbal irony can be used to make a point more effectively or to add humor to a conversation.

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In chemistry, the empirical formula of a chemical compound is the simplest whole number ratio of atoms present in a compound.

The empirical formula is BH₃. Its B:H ratio is 1:3.

Assume that you have 100 g of the compound.

Then you have 78.14 g B and 21.86 g H.

Now, we must convert these masses to moles and find their ratios.

From here on, I like to summarize the calculations in a table.

Element  Mass/g    Moles     Ratio     Integers

B          78.14      7.2285    1                    1

H          21.86    21.686      3.0001          3

The empirical formula is BH₃.

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The empirical formula will have a boron to hydrogen ratio of 1:3.

In chemistry, the empirical formula of a chemical compound is the simplest whole number ratio of atoms present in a compound. A simple example of this concept is that the empirical formula of sulfur monoxide, or SO, would simply be SO, as is the empirical formula of disulfur dioxide, S2O2.

Thus, sulfur monoxide and disulfur dioxide, both compounds of sulfur and oxygen, have the same empirical formula. However, their molecular formulas, which express the number of atoms in each molecule of a chemical compound, are not the same.

The molecular formula, on the other hand, shows the number of each type of atom in a molecule. The structural formula shows the arrangement of the molecule. It is also possible for different types of compounds to have equal empirical formulas.

The empirical formula is BH₃. Its B:H ratio is 1:3.

Assume that you have 100 g of the compound.

Then you have 78.14 g B and 21.86 g H.

Now, we must convert these masses to moles and find their ratios.

From here on, I like to summarize the calculations in a table.

Element   Mass/g    Moles     Ratio     Integers

B              78.14      7.2285    1                    1

H              21.86    21.686      3.0001          3

The empirical formula is [tex]BH_{3}[/tex].

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The expected result as the concentration of HCl(aq) increases from 0.050 M to 0.50 M is: (B) The reaction time decreases, and the rate of the reaction increases.

An aqueous solution of hydrogen chloride is what is known as hydrochloric acid, also referred to as muriatic acid. It has an unmistakably strong odor and is colorless. It is categorized as a powerful acid. It is a part of the gastric acid in most animal species' digestive systems, including humans.

The expected result as the concentration of HCl(aq) increases from 0.050 M to 0.50 M is that the reaction time decreases, and the rate of the reaction increases. This is because as the concentration of the acid increases, the number of acid molecules in the solution increases and therefore the number of collisions between acid molecules and magnesium increases. This leads to more frequent and successful collisions and a faster rate of reaction.

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A monoprotic acid is an acid that donates one proton (H+) when dissolved in water. Thus option E is the correct answer.

A monoprotic acid is an acid that donates one proton (H+) when dissolved in water, thus forming the corresponding conjugate base and hydronium ions (H3O+). Examples of monoprotic acids include hydrochloric acid (HCl), sulfuric acid (H2SO4), and acetic acid (CH3COOH).

A diprotic acid is an acid that donates two protons when dissolved in water. An example of diprotic acid is sulfuric acid (H2SO4). A tricrotic acid is an acid that donates three protons when dissolved in water. An example of tricrotic acid is phosphoric acid (H3PO4). An analyte is a substance or ion that is being analyzed in a chemical or biological sample.

Salt is a neutral compound formed from the reaction of an acid and a base, which typically contains positively and negatively charged ions. A titrant is a solution of known concentration, used to determine the concentration of an unknown solution through a titration process.

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One single amino acid weighs 110 D a. Now, this problem is fairly simple. The way we find out, the weight of 701 amino acids is just multiplying. Ah, that number by 110. So all we have to dio is multiply 682 by 110. So our final answer will be 77,110.

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The correct condensed structure of hexene is CH₃CH₂CH=CHCH₂CH₃.

A condensed structural formula also termed as semi-structural formula and it is used to describe the organic compounds in a line of text. They will be illustrated in a single line of text and specifies the atoms in the order which are located in a molecule.

Hexene is a hydrocarbon having chemical formula C₆H₁₂. It s used as a comonomer in the production of the polyethylene. There are several number of isomers in hexene, depending on the geometry and position of the double bond in the chain. One of the most common useful of isomers is 1-hexene as well as an alpha-olefin.

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The molecular formula of the chemical substance is C2H3 * 2.068 = C4H6 which is option (c)

The empirical formula of a chemical substance gives the lowest whole-number ratio of atoms in a molecule. The molar mass of a substance is the mass of one mole of the substance. To find the molecular formula of a substance, we need to determine the ratio of atoms in the molecule and compare it to the ratio given by the empirical formula.

The molar mass of the substance is 54.091 g/mol, and the empirical formula is C2H3. To find the molecular formula, we can divide the molar mass by the molar mass of the empirical formula.

54.091 g/mol / (2 x 12.011 g/mol + 3 x 1.008 g/mol) = 54.091 g/mol / 26.042 g/mol = 2.068

Since the ratio of atoms in the molecule is 2.068 times that of the empirical formula, the molecular formula is C2H3 * 2.068 = C4H6 which is option (c)

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Answer:

C4H6 (c)

Explanation:

I took the test

The molecular formula gives the actual number of atoms of each element present in a molecule, while the empirical formula gives the simplest whole number ratio of atoms of each element present in a molecule.

The molecular formula and the empirical formula of a compound are related but they are not the same. The molecular formula is the actual number of atoms of each element present in a molecule of the compound, while the empirical formula gives the simplest whole number ratio of atoms of each element present in a molecule of the compound.

In other words, the molecular formula expresses the exact number of atoms of each element present in a molecule and the empirical formula expresses the relative number of atoms of each element. For example, glucose has a molecular formula of C6H12O6, but its empirical formula is CH2O, which gives the simplest ratio of atoms in the molecule. In general, the molecular formula can be a multiple of the empirical formula.

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The main idea of Amy Tan's text is the importance of communication through language.

It is the subject that the text wants to present.It is the subject that will guide all the information in the text.

In "Mother Tongue," Amy Tan uses her mother as an example to show the importance of communication. That's because it shows that her mother is a Chinese immigrant, who speaks "broken English."

Therefore, The main idea of Amy Tan's text is the importance of communication through language.

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The following statement is not true about lighteners- " They are used at relatively high levels'.

Skin lighteners are products that are designed and used to bleach the skin from dark spots and pigments. They are usually used to improve one's physical appearance such as blemishes, dark patches and birthmarks.

They work on the skin by reducing or slowly blocking the production of melanin in the skin. The pigment melanin is responsible for the colour it gives to our skin. It also protects our skin from the harmful effects of the sun.

It usually takes few weeks or even three to four months for lighteners to show effective results on continued usage.

Thus, option (a) is correct.

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The limiting reagent in a chemical reaction is HCl (aq); the maximum output of CO2/mol is 0.05; and the reactant that is consumed first is CO2.

The limiting reactant, sometimes referred to as the limiting reagent, regulates how much product is produced in a chemical process. If the limiting reactant has been found, the theoretical yield of the reaction may be calculated.

The limiting reagent is the one that will completely consume itself in a chemical process. Once that reactant has been used up, the reaction cannot go on. As a result, it stops the reaction from getting stronger. The excess reagent would have continued to react if the other reactant hadn't been consumed.

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Parts per million is the type of concentration calculated when the grams of solute is divided by the grams of solution, and the result is multiplied by 1,000,000 (option 2)

Parts per million, or ppm, is one method of expressing concentration. The formula involves dividing the grams of solute and the grams of solution, then multiplying the result by 1,000,000 (one million). One milligram of solute per kilogram of solution is equal to parts per million.

This stands for "parts per million" and can also be written as mg/L (milligrams per liter). The mass of a chemical or contamination per volume of water is the unit of measurement here. On a lab report, ppm or mg/L both mean the same thing.

The absolute fractional amount multiplied by one million equals one ppm. To better understand ppm, imagine placing four droplets on a table.

The question is incomplete, it should be:

Which type of concentration is calculated when the grams of solute is divided by the grams of the solution, and the result is multiplied by 1 000 000?

(1) molarity

(2) parts per million

(3) percent by mass

(4) percent by volume

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So, sodium and chloride make up 39.3% and 60.7%, respectively, of NaCl.

Example:

What is the % composition of a compound with a total mass of 34.37 g, of which 21.43 g is phosphorous and 12.94 g is magnesium?

Mass percent of magnesium equals 12.94g/34.37g, or 37.6%

21.43g/34.37g or 62.4% of the mass is made up of P.

Magnesium and phosphorous make up 37.6% and 62.4%, respectively, of this compound's percent composition.

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Sister chromatids is the term for the chromosomes that are identical after DNA replication.

Sister chromatids are identical chromosomes that are created during the process of DNA replication. DNA replication is the process where a DNA strand is copied, creating a new strand. During this process, each chromosome is split in half, forming two identical halves.

These halves are known as sister chromatids and are held together by a centromere. Sister chromatids are attached to one another during the interphase stage of the cell cycle and are separated during the metaphase stage of the cell cycle.

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