A teacher carried out a class demonstration on
diffusion similar to that using ammonia (M = 17)
and hydrochloric acid (M = 36.5) (Figure 1.21).
However, they replaced the ammonia with
methylamine (M, = 31), which reacts in a similar
way to ammonia (note that M, is the relative
molecular mass of the substance).
g water
a
Where would you predict the position of the
smoke ring to be in this experiment? Explain
your answer

A stoichiometric mixture is a mixture of fuel and oxygen for which the masses of these two components are exactly those needed for complete combustion.

A stoichiometric mixture is a balanced mixture of fuel and oxygen.

The fuel and the oxygen react completely without the excesses of either.

The opposite of a stoichiometric mixture is called feeding an excess, when minimum one reactant is an excess amount.

Balanced chemical equation for reaction of combustion one type of a fuel: C₈H₁₈ + 25/2O₂ → 8CO₂ + 9H₂O

Stoichiometric mixture for this example is when fuel (C₈H₁₈) and oxygen(O₂) react in proportion 1 : 12.5.

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A given short peptide, SGYAL contains four peptide bonds. Any given short peptides/protein contain at least one amino group(s) (nh3 ) and one carboxyl group(s) (-coo- ).

SGYAL stands for secretaria general y asuntos legales. Sgyal is also written as Ser-Gly-Tyr-Ala-Leu . The structure of SGYAL is shown in the image attached. SGYAL contains four peptide bonds as highlighted by yellow color in the structure of SGYAL.

Peptide bond is formed by the condensation of carboxylic group of one molecule and amino group of other molecule. Any given short peptides/protein contain at least one amino group(s) ([tex]NH_{3}[/tex]) and one carboxyl group(s) ( -COO-).

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There are thousands of hydrogen atoms so together they can let off or group up to form all four colors.

Hydrogen is a chemical element with the symbol H and atomic number 1. Hydrogen is the lightest element. Under standard conditions, hydrogen is a diatomic molecular gas of the formula H2. It is colorless, odorless, tasteless, non-toxic, and highly flammable.

Hydrogen is an energy carrier that can be used to store, transfer, and deliver energy generated from other energy sources. Hydrogen fuel can be produced today by several processes. The most commonly used methods today are natural gas reforming (a thermal process) and electrolysis. It is found in the Sun and most stars, and the planet Jupiter is composed primarily of hydrogen. On Earth, hydrogen is most abundant as water. As a gas in the atmosphere, it is present in trace amounts, less than 1 ppm by volume.

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Explanation:

The body has levels of organization that build on each other. Cells make up tissues, tissues make up organs, and organs make up organ systems. The function of an organ system depends on the integrated activity of its organs. For instance, digestive system organs cooperate to process food.

A molecule has an empirical formula of ch, and its molar mass is known to be 26 g/mol and the  molecular formula is C₂H₂ ethyne

Molecular formula of compound is (CH)n and the given molar mass is 26g/mol

Molar mass of (CH)n, C=12=n(12+1)=13n

So 13n and n=2

=13×2=26 and given molar mass is also 26g/mol

So here two carbon and two hydrogen so molecular formula is C₂H₂ and name is ethyne

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The energy of the carbide released is 7262.5MJ.

We know that the reaction between calcium  oxide and carbon occurs in accordance with the reaction; [tex]CaO(s)+3C(s)----- > CaC_{2} (s)+CO(g)[/tex]. The reaction is seen to produce 464.8kJ of energy per mole of carbide produced.

Number of moles of [tex]CaC_{2}[/tex] produced = 1000 * 10^3 g/64 g/mol

= 15625 moles of calcium carbide

If 1 mole of [tex]CaC_{2}[/tex] transfers  464.8 * 10^3 J

15625 moles of calcium carbide transfers 15625 moles  * 464.8 * 10^3 J/ 1 mol

= 7262.5MJ

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If a mixture of quartz and bauxite contains 78% of quartz this means

There are 78gm of quartz in 100 gm of mixture/

There are 78gm of quartz for every 22 gm of bauxite.

There are 117gm of quartz for every 150gm of mixture.

If there is 78% of quartz in mixture of quartz and bauxite then

78% of quartz in 100% of mixture

If we suppose we have 100gm of mixture

Then ,

78% of 100 gm = 78gm

i.e. we have 78gm of quartz in mixture

100gm = quartz+ bauxite

100gm +78gm + bauxite

100- 78 = bauxite

Therefore bauxite = 22gm

Thus in 100 gm of mixture there is 78 gm of quartz and 22gm of bauxite.

If we suppose we have 150gm of mixture

Then ,

78% of 150 gm = 117gm

i.e. we have 117gm of quartz in mixture

150gm = quartz+ bauxite

150gm = 117gm + bauxite

150- 117 = bauxite

Therefore bauxite = 33gm

Thus in 150 gm of mixture there is 117gm of quartz and 33gm of bauxite.

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The number of NMR signals represents the number of different types of protons in a molecule.

What is molecule?

A molecule is defined as a collection of two or more atoms held together by the attractive forces known as chemical bonds; depending on the context, the term may or may not include ions that fit this criteria.

The spectrum has five signals which indicate five types of different protons.

What does a type of proton mean?

Here type of proton means protons are grouped in types based on their environments.

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Answer:

h20 + NH3

Explanation:

water plus ammonia gives or produces a weak qcid

Answer:

The answer is hydrogen bonding

Explanation:

The form of motion which is described is velocity as it is describing the speed as well as the direction.

Motion is defined as a phenomenon which is described with respect to change in object's position with respect to time.It is given in terms of displacement,velocity,distance ,acceleration,speed.

Branch of physics which deals with motion of objects without any reference to it's cause is called kinematics while the branch which studies forces and their effects on motion is called as dynamics.

Motion applies to various systems like objects,bodies, matter particles ,radiation ,curvature.There are three laws of motion which are proposed by Newton.Classical mechanics is based on Newton's law of motion.Relativistic  mechanics is based on modern kinematics.

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The elements Br₂ and ICl have the same number of electrons, yet Br₂ melts at -7.2°C and ICl melts at 27.2°C because Br₂ is a non-polar molecule with dispersion force as intermolecular interaction between them, whereas ICl is a polar molecule with dipole-dipole interactions and dispersion foces as intermolecular interaction.

ICl is with permanent dipole moment as the electronegativities of Cl and I are diffferent from each other.

The melting point of any compound rests on the intermolecular forces' stregth. More energy is required for stronger intermolecular forces so that it can overcome and have a higher melting point.

In Br₂ and ICl, the strength of dispersion force is similar because they have same number of electrons. But ICl have stronger dipole interactios too.

Therefore, strength of intermolecular forces is larger in ICl than in Br₂, so ICl have a high melting point of 27.2°C than Br₂ ( -7.2°C).

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4x + 13

4 * -3 + 13

-12 + 13

1

The correct answer is 7596.5 Joules of heat energy is required to raise the temperature of 193 g of ethanol from 19°C to 35°C.

The amount of heat required is calculated as follows:

Q = mC∆T

m = mass =193g of ethanol

C = specific heat = 2.46J/g°C

∆T = T f-Ti = 35-19°C = 16°C

Q = 193g *2.46J/g°C *16°C

Q = 7596.5 J

We are interested in the value of Q, which is the quantity of heat. We would use the equation Q = mCΔT to do so.  mass and specific heat  are known; using the initial and final temperatures, the T can be calculated. Once we know three of the four quantities in the relevant equation, we can substitute and solve for Q. The amount of heat energy required to raise the temperature of a substance is referred to as its specific heat energy.

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Vasoconstrictor Preservative is the solution that is added to the cartridge of local anesthetic that can trigger bronchospasms.

Contraction of the muscles that line the airways (bronchi) in your lungs is referred to as bronchospasms. This causes difficulty in breathing. Chest tightness, Wheezing, Shortness of breath, Difficulty breathing are some of the symptoms of bronchospasms.

Vasoconstrictor Preservative is an additive which is used in local anesthetic. It enhance the duration and quality of the local anesthetic and also decreases surgical blood loss. Local anesthetics without a vasoconstrictor should be used in patients with sulfite allergy. Epinephrine, Levonordefrin, and Norepinephrine are some of the vasoconstrictors used with local anesthetic.

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Polyprotic Acid : Acids that can mislay, and bases that can gather up, more than one H+ (e.g. diprotic H2A and triprotic H3A acids).

Ionization take place stepwise, and each and every step has its own Ka.

H3PO4 (aq) ⇌ H+ (aq) + H2PO4 - (aq) Ka1 = 7.2 x 10-3

H2PO4 - (aq) ⇌ H+ (aq) + HPO4 2- (aq) Ka2 = 6.3 x 10-8

HPO4 2- (aq) ⇌ H+ (aq) + PO4 3- (aq) Ka3 = 4.2 x 10-13

According to question

To decide the fractional concentrations of one and all species at assorted pH values, first write the Henderson-Hasselbalch equation for each and every dissociation reaction.

Formula of Henderson-Hasselbalch equation is :

pH = pKa + log10 ([A–]/[HA])

pH = pK1+log[H2PO^4-] / [H3PO4]

pH=pK2+log[ HPO^2-] / [H2PO^4-]

pH = pK3+log[PO^3- 4] / [HPO^2- 4]

a. Fraction of H3PO4: pH0 = 0.993; pH2 = 0.58; pH4 = 0.01 ; pH 6 is negligible.

b. Fraction of HPO4 ^2- : pH 0 is negligible and 0.06; pH8 = 0.86; pH10 = 1.0; pH12 = 0.72

c. Fraction of PO3 ^2- : negligible at any pH < 10 ; pH 12 = 0.28

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The Mole is the SI unit that expresses the amount of substance. Specifically, mole is defined as the amount of substance containing the same number of entities as there are in the 12 grams of Carbon - 12.

Mole is denoted by using symbol mol.

      Mole = 6.022 x 10²³ elementary entities.

These number of elementary entities in 1 mole is equal to or called as an Avogadro's number.  Mole is equal to 6.022 x 10²³ because this number of entity is same as in exactly 12 g of carbon-12.

It is a very important SI unit of measured which is used by the chemists. Moles are used in measuring in small or tiny things such as atoms, molecules and the other tiny particles.

A mole is the atomic weight of any molecule which is measured in grams. The concept of mole might be used for the mass and number of particles conversion.

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The nurse will administer an i.v. bolus, gently aspirate the I.V. catheter to check for the blood return.

What is atrial fibrillation?

A-fib, or atrial fibrillation, is an irregular and frequently very rapid heart rhythm (arrhythmia) that can cause heart blood clots. A-fib increases the risk of stroke, heart failure, and other heart-related problems.

AFib is mostly brought on by chaotic signals that cause the atria, the two top chambers of your heart, to contract quickly and out of time. Because of how swiftly they contract, the heart's walls fibrillate. AFib may result from electrical system damage to your heart.

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The average atomic mass of the element X is 85.5257 amu

Ffrom the question given above, the following data were obtained:

The average atomic mass of the element can be obtained as illustrated below:

Average atomic mass = [(Mass of isotope 1 × Abundance of isotope 1)/100] + [(Mass of isotope 2 × Abundance of isotope 2)/100]

Average atomic mass = [(83.9118 × 75.15)/100] + [(86.9092 × 25.85)/100]

Average atomic mass = 85.5257 amu

Thus, the average atomic mass of the element is 85.5257 amu

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Under certain conditions, excessive Sweating results in water depletion, which is called Dehydration. A sign of water depletion is Weight Loss.

Dehydration means less intake of fluid such as water, juices etc or by losing more fluid than the amount of fluid you have taken. Fluid can be lost in the form of sweat, tears, urine, vomiting, or diarrhoea.

A dehydration reaction can be defined as the chemical reaction between any two compounds where one of the products is water. Dry mouth and tongue, no tears when crying, Sunken eyes and cheeks are some of the signs of dehydration.

Under certain conditions, excessive Sweating results in water depletion, which is called Dehydration. A sign of water depletion is Weight Loss.

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The formula weight of ammonium sulfate ((NH₄)₂SO₄), rounded to the nearest integer, is 132 amu

Ammonium sulfate ((NH₄)₂SO₄) formula are as follow:

((NH₄)₂SO₄)

Now,28+8+32+64  = 132gm/mol

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A different scientist makes zinc iodide by the same method. the scientist obtains 12.5g of zinc iodide. the percentage yield in this reaction is 92.0% then the theoretical mass is 13.6 g.

Percent yield is defined as a measure of actual number of mole obtained by reactant in comparison to the theoretical yield.

Percent yield equal to actual yield divided by  theoretical yield  multiply by 100

As given percent yield is 92%, actual yield is 12.5 g

Then Theoretical yield = actual yield / theoretical yield x 100

= 12.5 / 92 x 100 = 13.6 g

Thus, different scientist makes zinc iodide by the same method. the scientist obtains 12.5g of zinc iodide. the percentage yield in this reaction is 92.0% then the theoretical mass is 13.6 g.

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The complete hydrolysis of a protein produces a mixture of free amino acids.

Acids are molecules or ions that can donate protons, known as Bronsted-Lowry acids, or form covalent bonds with electron pairs, known as Lewis acids. The first category of acids is proton donors or Brønsted-Lowry acids.

No oil is either an acid or a base. Neutral. Oil is a neutral, nonpolar chemical. That is, it is a viscous liquid at room temperature. It is immiscible with water, but soluble in alcohol and ether. Whole eggs are relatively pH neutral, but egg whites are one of the few foods that are naturally alkaline, with an initial pH of as high as 7.6 when eggs are laid, but the alkalinity increases as eggs age and reach increases. the pH of 9.2.

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The molecular mass of glucose is 180 g. To make 1 M solution of glucose , you should dissolve 1 mole of glucose in 1 litre of water.

The molecular mass of glucose is 180.16 g/mole, therefore 1 mole is 180.16 grams.

So, to make a 1 M solution, you should take 1 mole = 180.16 g of glucose and make up to 1 litre.

Working glucose solution is prepared by diluting the stock solution.

It can also be said that 1 M glucose solution is  -

                       1 M glucose solution = 180 g / 1000 m L

                                                          = 0.18.

So, it is 0.18 % w/v.  

Glucose solution is a mixture of glucose and water. It is used to treat low blood sugar and the water loss without the electrolyte loss. Glucose solution is an isosmotic solution. If it is in large amount, it produces hypertonic effects on the system.

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The empirical formula of a compound with molecules containing 12 carbon atoms, 14 hydrogen atoms, and 6 oxygen atoms is C₆H₇O₃.

The empirical formula gives the proportions of the elements present in a compound.

In this compound proportion od carbon, hydrogen and oxygen atoms is:

n(C) : n(H) : n(O) = 12 : 14 : 6 /÷2; in this example, molecular formula is divided by two

n(C) : n(H) : n(O) = 6 : 7 : 3

In the empirical formula, the proportion od carbon, hydrogen and oxygen atoms is 6 : 7 : 3, so the empirical formula is C₆H₇O₃.

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Natural law demonstrates constant composition wherever it is found, water always contains oxygen and hydrogen in the mass ratio of 8 to 1.

The above statement agreed by Law of constant proportions according to this law, a chemical compound always contains the same proportion of elements by mass. thus, irrespective of the source, or chemical compound always contains the element in a fixed ratio by mass for example, pure water obtained from river, sea, well always contains hydrogen and oxygen combined together in the ratio of 1:8 by mass that's why wherever it is found, water always contains oxygen and hydrogen in the mass ratio of 8 to 1. Taken by itself, this fact demonstrates constant proportions law  demonstrates as natural law

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Answer:

its placebo it is inactive substance not active like outer drugs which forms bonds with chemicals present in our body

The placement of electrons in orbitals surrounding an atomic nucleus is known as electronic configuration

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