For the water + acetone + chlorobenzene system, construct the equilibrium diagram. Experimental data is shown in the table below. Plot the binodal curve, the critical point and the conjugation line eq

The relation between half-life and rate at which it is decaying is given by

t(1/2) = log2/rate

now in the above problem half-life is given as 1459 years substituting in the above equation we get the value of rate at which it is decaying to be rate=0.0001075.

The amount of substance that is present after t years given that the half-life of the substance is h is calculated through the equation,

A(t) = A(o)(0.5^t/h)

The 1/2-life of a radioactive isotope is the quantity of time it takes for one-1/2 of the radioactive isotope to decay. The half of-existence of a selected radioactive isotope is consistent; it's miles unaffected by using situations and is independent of the initial quantity of that isotope.

1/2-life (symbol t1⁄2) is the time required for an amount (of substance) to reduce to half of its initial price. The time period is commonly utilized in nuclear physics to explain how speedy volatile atoms undergo radioactive decay or how long strong atoms survive.

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Answer:

Reflection

Explanation:

Answer:

b

Explanation:

The probability that at least one of the specialists will detect tuberculosis in this person is 0.9994.

Given that a person with tuberculosis is given a chest x-ray. Four tuberculosis x-ray specialists examine each x-ray independently. If each specialist can detect tuberculosis 79% of the time when it is present.The probability that at least 1 of the specialists will detect tuberculosis in this person is to be calculated.

P( at least 1 specialist detects tuberculosis )=?

The probability that each specialist can detect tuberculosis = P(Detecting tuberculosis) = 79/100 = 0.79

The probability that the specialist cannot detect tuberculosis = P(Not detecting tuberculosis) = 1 - P(Detecting tuberculosis) = 1 - 0.79 = 0.21

Let A be the event that the specialist can detect tuberculosis.

Let B be the event that the specialist cannot detect tuberculosis.

Then, P(A) = 0.79, and P(B) = 0.21

Now, we need to find the probability that at least one of the specialist detects tuberculosis.The probability that at least one of the specialist detects tuberculosis is given as :

P(at least one of the specialist detects tuberculosis) = 1 - P(no specialist detects tuberculosis)

P(no specialist detects tuberculosis) = P(Not detecting tuberculosis) for the 1st specialist × P(Not detecting tuberculosis) for the 2nd specialist × P(Not detecting tuberculosis) for the 3rd specialist × P(Not detecting tuberculosis) for the 4th specialist = 0.21 × 0.21 × 0.21 × 0.21 = (0.21)^4

Putting this value in the formula :

P(at least one of the specialist detects tuberculosis) = 1 - P(no specialist detects tuberculosis)

= 1 - (0.21)^4 = 0.9994= 0.9994 (rounded to four decimal places)

Therefore, the probability is 0.9994.

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Avogadro's number (6.02*1023) of something is defined as 1 mole. So one mole of sulfur (or any other element) equals 6.02*1023 atoms. 4.56 moles is only 4.56 times as much.

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Answer:

1. Sulphuric acid

2. Car battery acid

3. Washing up liquid

4. Milk of magnesia

5. Metal polish

6. Oven cleaner

Explanation:

Universal paper can determine the pH of a solution. It ranges from dark red (pH 0 - very acidic) to orange/yellow, to green (pH 7 - neutral) to blue, dark blue and purple (pH 14 - very alkaline)

Sulphuric acid has the lowest pH as the universal indicator is red.

The next is car battery acid which is pink - not as acidic as red.

The next is washing up liquid, which is yellow, around pH 3 or 4.

The next is milk of magnesia with light blue, around pH 9 or 10.

Metal polish is dark blue - around pH 11.

Oven cleaner is the darkest, with purple.

The compound is called 2,4-dimethylpentane.

2,4-dimethylpentane is a hydrocarbon compound consisting of five carbon atoms arranged in a linear chain with two methyl groups attached to the second and fourth carbon atoms. The prefix "2,4-dimethyl" indicates the positions of the methyl groups, while "pentane" signifies the presence of a five-carbon chain. This compound belongs to the alkane family, which is characterized by single bonds between carbon atoms and saturated hydrocarbon structures.

2,4-dimethylpentane is an organic compound commonly used as a solvent in various industries, including pharmaceuticals, paints, and coatings. Its unique molecular structure and chemical properties make it an effective choice for dissolving nonpolar substances. It is a clear liquid with a strong hydrocarbon odor and is highly flammable.

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The general equation for a double-displacement reaction is

A + BX ---> AX + B or AX + BY ---> AY + BX

Here, A and B represent two different chemical species (such as ions or molecules), and X and Y represent their respective chemical partners.

The positively charged species (A and B) exchange partners (X and Y) in a double displacement process to create new compounds (AX and BY). Because the positively charged species "switch" partners, this kind of reaction is often referred to as a "swap" reaction.

Double-displacement reactions include the following examples:

1. The transformation of silver nitrate (AgNO3) into sodium nitrate (NaNO3) by the reaction of sodium chloride (NaCl) and AgNO3:-

NaCl(aq) + AgNO3(aq) AgCl(s) + NaNO3(aq)

2. The transformation of barium chloride (BaCl2) into barium sulfate (BaSO4) and sodium chloride (NaCl) via the following equation:-

BaCl2(aq) + Na2SO4(aq) BaSO4(s) + 2NaCl(aq)

Depending on the chemical makeup of the reactants, not all double-displacement reactions are metathesis reactions, it is crucial to keep in mind.

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Answer:

b

Explanation:

I'm guessing don't hold me to it

Answer: 3. C) a cave

Explanation:

A sinkhole is a hole in the ground caused by the decline of water levels and disturbance of the soil. If you'd like to imagine how it looks, search "sinkhole".

If a sinkhole occurs, more cracks form and the hole itself becomes larger, what do you expect would happen?

The formation could become a cave.

The answer is C. A cave.

Hope this helps!

Answer:

people or scientist tend to observe the nature of the continents that described by jigsaw fit,geological similarity among the continents

1) Mass of aluminum powder is 2.7 g.

2) Mass of magnesium sulfate is 19.9 g.

3) Mass of calcium oxide is 14g.

4) Mass of lead 412.2 g.

1) In the thermite reaction :

2Al     +     Fe₂O₃   ----->  Al₂O₃   +   2Fe

mass of  Fe₂O₃ = 8.0 g

molar mass of   Fe₂O₃ = 159.6 g/mol

number of moles = mass / molar mass

                             = 8.0 g / 159.6 g/mol

                             = 0.050 moles

1 mole of  Fe₂O₃ react with 2 mole of Al ,

0.050  Fe₂O₃ moles react with 2 × 0.050 = 0.1moles of Al

number of moles of Al = mass / molar mass

mass of Al = no. of moles × molar mass

                 = 0.1 mol × 27 g/mol

                 = 2.7 g

Thus, the mass of aluminum powder is needed to react with 8.0 g of iron (III) oxide is 2.7 g

2) the reaction is :

MgCO₃ +   H₂SO₄  ----->   MgSO₄   +   CO₂    +   H₂O

mass of MgCO₃ = 14.0 g

no. of moles of MgCO₃ = mass / molar mass

                                      = 14 g / 84.3 g/mol

                                      = 0.166 moles

1 mole of MgCO₃  produced 1 mole of MgSO₄,

0.166 mole of MgCO₃  produced 0.166 mole of MgSO₄

mass of MgSO₄ = 120.3 g/mol

no. of moles of MgSO₄ = mass / molar mass

mass of MgSO₄ = no. of moles × molar mass

                          = 0.166 mol × 120.3 g/mol

                          = 19.9 g

Thus, mass of magnesium sulfate crystals can be made from14.0g of magnesium carbonate and an excess of dilute sulfuric acid is 19.9 g

3) the reaction is :

CaCO₃   ----->   CaO + CO₂

mass of calcium carbonate = 25 g

molar mass of CaCO₃ = 100 g/mol

no. of moles of = mass / molar mass

                         = 25 / 100

                         = 0.25 mol

0.25 moles of CaCO₃ produced 0.25 moles of CaO

molar mass of  CaO = 56 g/mol

mass of CaO = no. of moles × molar mass

                      = 0.25mol × 56 g/mol

                      = 14 g

the mass of CaO produced 14 g.

4) PbO  +   H  ----->    Pb   + H₂O

mass of PbO = 446g

no. of moles = mass / molar mass

                     = 446 g / 223.3 g/mol

                     = 1.99 mols

1.99 moles of PbO produced 1.99 moles of Pb

molar mass of Pb = 207.2 g/mol

mass of Pb = no. of moles × molar mass

                   = 1.99 mol × 207.2 g/mol

                   = 412.2 g

Thus, Lead (ii) oxide PbO, reacts with hydrogen to for lead and steam. calculate the mass of lead in formed when 446g of lead (ii) oxide is 412.2g.

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The sugar is the covalent compound. The sugar is composed of the carbon, the oxygen, and the hydrogen .

The Sugar, are composed of the carbon, the oxygen, and the hydrogen and has the covalent bonds. The covalent bond is formed when the bond is formed by the mutual sharing of the electrons in between the atoms or the molecules.

The compound formed by the covalent bond is called as the covalent compounds. Therefore, the sugar is the covalent compound as  all the covalent bonds in the sugar molecules arise by the  result of the electron sharing in between the atoms.

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When atoms form chemical bonding then the atoms attain Noble gas configuration.

Noble gas configuration of an atom includes the fundamental image of the ultimate noble fueloline previous to that atom, observed via way of means of the configuration of the ultimate electrons.so for sodium, we make the substitution of [Ne] for the 1s22s22p6 a part of the configuration. Sodium's noble fueloline configuration becomes [Ne]3s1.

Covalent bonds, atoms percentage pairs of electrons, at the same time as in ionic bonds, electrons are absolutely transferred among atoms in order that ions are formed.During the formation of a chemical bond, the predicted end result is that the electrons will whole a noble fueloline configuration in each atoms. Typically, while atoms shape a chemical bond, the predicted end result is that the electrons.

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Answer:

C

Explanation:

they can be put in other languages

they are literally the name of the chemical

they don't show quantity

The "major drawback" to using word equations is that they are not quantitative. Option C is correct.

Chemical reactions are written in word equations to give a clear and concise understanding of the reaction taking place. However, word equations are not quantitative. A equation is a way of representing a chemical reaction using words. It identifies the reactants and products and their physical states as well as the condition under which the reaction is taking place.

For example, the word equation for the reaction between hydrogen gas and oxygen gas to produce water is:

Hydrogen gas + oxygen gas → water

Quantitative equations use chemical formulas, numbers and symbols to represent the reactants and products in a chemical reaction. They provide a quantitative understanding of the reaction in terms of the number of atoms and molecules involved.

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Answer:

The correct answer is 25 %

Explanation:

According to the chemical reaction:

Xe(g) + 2 F₂ (g) → XeF₄ (g)

1 mol of Xe(g) reacts with 2 mol of F₂(g), so the stoichiometric ratio os reactants is 2 mol F₂/mol Xe.

We have 2.2 mol Xe and 2.0 mol F₂, so the ratio is:

2.0 mol F₂/2.2 mol Xe = 0.909 mol F₂/mol Xe

The molar ratio of reactant we have is lower than the required, so F₂ is the limiting reactant.

By using the limiting reactant, we calculate the theoretical amount of product (XeF₄). For this, we know that 1 mol of XeF₄ is formed from 2 mol of F₂ (1 mol XeF₄/ 2 mol F₂), and we have 2.0 mol F₂:

2.0 mol F₂ x (1 mol XeF₄/ 2 mol F₂)= 1 mol XeF₄

If we only obtained 0.25 mol XeF₄, the percent yield of the experiment is:

Yield = experimental amount/theoretical amount x 100%

        = 0.25 mol XeF₄/ 1 mol XeF₄ x 100% = 25 %

The percent yield of the solution is 25%.

The equation of the reaction is;

Xe(g) + 2F₂ (g) → XeF₄ (g)

From the reaction equation;

1 mole of Xe reacts with 2 moles of F2

2.2 moles of Xe will react with 2.2 moles × 2 moles /2 moles

= 4.4 moles of F2

We can see that there is not enough  F2 hence it is the limiting reactant

2 moles of F2 yields 1 mole of XeF4

2 moles of F2 yields 2 moles ×  1 mole/2 moles = 1 mole of XeF4

% yield = actual yield/Theoretical yield × 100

% yield =  0.25 mole/ 1mole × 100

% yield =  25%

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Answer:

A fractional crystallisation method is used for separating a mixture of two solids, if their solubilities in a particular solvent differ widely.

Explanation:

B. The final speed of the ball when it hits the ground is determined as 24.2 m/s.

The final speed of the ball can be determined by applying the principle of conservation of energy as follows;

K.E = P.E

¹/₂mv² = mgh

v² = 2gh

v = √2gh

where;

Substitute the given parameters and solve for the maximum speed of the ball.

v = √(2 x 9.8 x 30)

v = 24.2 m/s

Thus, the final speed of the ball when it hits the ground is determined as 24.2 m/s.

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Answer:

A, And D

Explanation:

I did this before and i got it right ❤

Answer:

mol = 6.75

Explanation:

Remember the equation for Molarity:

Molarity = mol/liters

So,

1.5M = mol/4.5

not isolate mol by multiplying 4.5 by both sides, using algebra

mol = 6.75

I found this. hope it helps!

Answer:

The SAE curriculum includes practical farming tasks conducted outside the scheduled classroom and laboratory period by students. SAEs offer a method for students in agricultural education to gain real-world work opportunities that they are most interested in in the field of agriculture. Supervised agricultural experience is an essential component of agricultural education, and all Agriculture, Food and Natural Resources (AFNR) courses are a necessary component.

Explanation: Hope it helps

Answer:

The correct answer is - 1, 2, and 4 statements.

Explanation:

Beta and gamma turns are common plots or turns in proteins and contain intra-turn hydrogen bonds. This hydrogen bond is present between CO of residue i and NH of residue i+3 that holds the confirmation in beta turns.

Beta turns, assist the protein to get their globularity, as the aim of beta turns is to reverse the direction of the polypeptide. The two main of beta turns are type-I and type-Il. and their minor images are type-I and type-Il.

Thus, the correct answer is - 1, 2, and 4 statements.

The concentration (in molarity) of the gas if that gas were sealed to the 250 mL of space in the flask is 0.3776 M.

Molarity of any substance is defined as the number of moles of solute present in per liter of the solution and it will be represented as:

M = n/V, where

n = moles = 0.0944mol

V = volume = 250mL = 0.25L

On putting values, we get

M = 0.0944 / 0.25 = 0.3776 M

Hence required molarity is 0.3776 M.

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The number of stereoisomers possible for each compound is:

a) square planar [Pt(NH3)2Cl2] has 1 stereoisomers.

b) tetrahedral [NiClBr3]²- has 2 stereoisomers.

c) octahedral [PtBr4Cl2]²- has 3 stereoisomers.

a) For the square planar compound [Pt(NH3)2Cl2], there is only 1 stereoisomer possible. This is because the arrangement of ligands in a square planar geometry does not produce any distinct spatial orientations that could be considered as different stereoisomers.

b) For the tetrahedral compound [NiClBr3]²-, there are 2 stereoisomers possible. These are the enantiomers (mirror image isomers) due to the presence of a single central atom with four different ligands attached in a tetrahedral arrangement.

c) For the octahedral compound [PtBr4Cl2]²-, there are 3 stereoisomers possible. These include 1 cis isomer and 2 trans isomers, as the octahedral geometry allows for distinct spatial arrangements of the ligands with respect to each other.

In summary, [Pt(NH3)2Cl2] has 1 stereoisomer, [NiClBr3]²- has 2 stereoisomers, and [PtBr4Cl2]²- has 3 stereoisomers.

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Oxygen is a nonmetal and it has 6 valence electrons. (2s subshell has two and 2p subshell has four)

The element's size shrinks as it moves from left to right in a period, while its electronegativity rises. Therefore, we can conclude that an element's non-metallic property grows as an element moves from left to right over time.Elements get bigger and have lower electronegativities as they move down the group. As a result, their ionization energy drops and they become more metallic.Therefore, if we look at oxygen, it is situated in the sixteenth group, which is to the right of the periodic table, and the second period, which is smaller in size than other elements.

As a result, we can infer that the oxygen atom will have a significant non-metallic character because of its tiny size and strong electronegativity.

The electrons in an atom's outermost shell are called valence electrons. Because the electrons in the outermost shells of two atoms are the first to come into contact with one another and are the ones that control how an atom will react in a chemical reaction, when two atoms interact.

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Answer:

Oxygen is a non metal, and has 6 valence electrons.

Explanation:

I did it on plato