.645 kg of molten silver is at its melting point 962 is added to .8 kg of water at 20 c what is the final equilibrium temp

The substance in the image above would be classified as a mixture of elements (option E).

A compound is a substance formed by chemical bonding of two or more elements in definite proportions by weight.

On the other hand, a mixture is made when two or more substances are combined, but they are not combined chemically.

According to this question, an image is shown with two different substances or elements as distinguished by coloration (white and purple). These elements are combined but not chemically bonded, hence, is a mixture.

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Element M reacts with nitrogen to form compound \(M_3N_2\)with a mass of 43.5g. The name of element M is magnesium.

Based on the information provided, the compound \(M_3N_2\)is formed when element M reacts with nitrogen. The subscript "3" in the formula indicates that three atoms of element M combine with two atoms of nitrogen.

To determine the name of element M, we need to refer to the periodic table and find an element that can combine with nitrogen to form \(M_3N_2\). By looking at the periodic table, we can identify that the element with the symbol M should have a molar mass that corresponds to the given mass of 43.5g. Comparing the molar masses of elements, we find that the element with the symbol M is magnesium (Mg). Therefore, the name of element M is magnesium.

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Answer:

12 nitrogen atoms

Explanation:

This is essentially 3 molecules of Lead (IV) Nitrate, And since there were originally 4 nitrogen atoms in this single ionic compound, there are now 12 total

Answer:

pretty sure that's an old jolly rancher

Answer:

The blood circulatory system (cardiovascular system) delivers nutrients and oxygen to all cells in the body. It consists of the heart and the blood vessels running through the entire body. The arteries carry blood away from the heart; the veins carry it back to the heart. The system of blood vessels resembles a tree. The smallest arteries end in a network of tiny vessels known as the capillary network.

There isn't just one blood circulatory system in the human body, but two, which are connected, The systemic circulation provides organs, tissues and cells with blood so that they get oxygen and other vital substances. The pulmonary circulation is where the fresh oxygen we breathe in enters the blood.

Explanation:

Answer:

yes you are doing it right my chemistry teacher said said so

1.0608 mol/L is the concentration of the compound measured using UV/Vis spectrophotometer.

The equation for the Beer-Lambert Law has the following structure:

A=E×b×c

Where b is the sample's route length, E is the molar absorptivity, A is absorbance, and c is the compound's concentration in solution.

In question: E is 0.296 m- 1cm-1. A is .314 and path length is 1.00 cm.

By adding values in formula the answer is 1.0608 mol/L.

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It is important for understanding the electron configuration of elements when writing orbital diagrams because It is important in order to write all electrons with parallel spins, in order to write the correct number of total electrons, in order to write the correct number of paired and unpaired electrons and in order to indicate the order in which orbitals fill.

So, the correct answer is A, B, C and D.

Writing orbital diagrams is essential for understanding the electron configuration of elements. It is important because:

a) it ensures all electrons with parallel spins are properly depicted, following Hund's Rule;

b) it accurately represents the correct number of total electrons, which is vital for chemical bonding and reactivity predictions;

c) it shows the correct number of paired and unpaired electrons, which influences an element's magnetic properties; and

d) it indicates the order in which orbitals fill, following the Aufbau Principle, which helps determine the element's position in the periodic table and its associated properties.

Overall, orbital diagrams are crucial for comprehending an element's behavior and characteristics.

Hence,the answer of the question is A, B, C and D.

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When cooking an egg and waiting for coagulation, two things to look for are the firmness of the egg white and the doneness of the yolk.

The egg white should become opaque and set, indicating that it has coagulated properly. The yolk can be cooked to different degrees of doneness, depending on personal preference. For a runny yolk, it should still be soft and slightly jiggly in the center. For a firmer yolk, it should be more set and less jiggly. By observing these two aspects, you can determine the coagulation stage of the egg and achieve the desired texture for your egg dish.

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The ions that will combine to form a salt in the neutralization reaction are Cl- and Cs+.

In a neutralization reaction between hydrochloric acid (HCl) and cesium hydroxide (CsOH), the hydrogen ion (H+) from HCl combines with the hydroxide ion (OH-) from CsOH to form water (H2O).

This is the neutralization step where the acid and base react to produce a salt and water.

The remaining ions, chloride ion (Cl-) from HCl and cesium ion (Cs+) from CsOH, combine to form the salt cesium chloride (CsCl).

Therefore, the ions Cl- and Cs+ are the ones that combine to form the salt in this reaction.

Neutralization reactions occur when an acid and a base react to form a salt and water. The hydrogen ion (H+) from the acid combines with the hydroxide ion (OH-) from the base to form water (H2O).

The remaining ions from the acid and base combine to form the salt. In this case, hydrochloric acid (HCl) donates its hydrogen ion (H+) to combine with the hydroxide ion (OH-) from cesium hydroxide (CsOH) to form water.

The chloride ion (Cl-) from HCl and the cesium ion (Cs+) from CsOH combine to form the salt cesium chloride (CsCl). The salt is an ionic compound composed of Cs+ cations and Cl- anions.

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The correct answer is "Convexity has high value when investors expect that market yields will not change much." This statement is incorrect about the convexity term of a bond.

Convexity is the curvature of the price-yield relationship of a bond and a measure of how bond prices react to interest rate shifts.

Convexity is a term used in bond markets to describe the shape of a bond's yield curve as it changes in response to a shift in interest rates.

Bond traders use the convexity term to estimate the effect of interest rate changes on bond prices more precisely.

Bond traders use the term convexity to measure the rate of change of duration, which is a measure of a bond's interest rate sensitivity.

Convexity term and its features Convexity is always positive for a plain-vanilla bond.

We can improve the estimation of a price change with regard to a change in interest rates by accounting for the convexity of the bond.

Convexity is higher when market yields are unstable or when the bond has more extended maturity and lower coupon rates.

Thus, the correct statement about the convexity term of a bond is:

Convexity is higher when market yields are unstable or when the bond has more extended maturity and lower coupon rates.

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295.8k

that is the procedure above

Answer:

12?

Explanation:

Answer:

8

Explanation:

haploid is half

Answer:

mu answer is A

Explanation:

i think it is a popular opinion because its the opinion of a country

Ba(NO3)2 will form a precipitate when mixed with an aqueous solution of sodium sulfate (Na2SO4)

Barium Nitrate Crystals, When each of these is combined with sodium sulfate, one of the results is sodium nitrate, and the other is the positive/metal ion with sulfate. To make a precipitate (solid/insoluble), we need to look for the positive ion that goes with sulfate. The Solubility Rules may be found on page 6 of the Reference Tables.

Calcium sulfate, strontium sulfate, barium sulfate, mercury sulfate, lead (II) sulfate, and silver sulfate are the only insoluble sulfates. Because its positive ion is barium, the answer must be , Barium nitrate is the inorganic compound with the chemical formula Ba(NO3)2. It, like most barium salts, is colorless, toxic, and water-soluble.

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Answer:

Internal Cue

Explanation:

Answer:

an internal cue

Explanation:

just think

The current passing through the circuit is 0.5A

Data Given

To solve this question, we need to find out the total resistance in the remote.

The total resistance is given by

R = 6Ω

The voltage in the circuit is

\(v = 1.5 * 2 = 3V\)

To find the current in the circuit, we would use the formula which is given as

\(I = V/ R\)

let's substitute the values into the equation and solve for I

\(I = V/R\\I = 3/ 6\\I = 0.5A\)

The current passing through the remote is 0.5A

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The enthalpy of formation of NaCl(s) from elemental Na(s) and Cl₂(g) is -411.65 kJ/mol.

The enthalpy of formation for NaCl(s) can be calculated using the given data as follows;

Na(s) → Na(g)

ΔH1 = +108 kJ/mol

1/2Cl₂(g) → Cl(g)

ΔH2 = +121 kJ/mol

Na(g) → Na+(g) + e-

ΔH3 = +496 kJ/mol

Cl(g) + e- → Cl-(g)

ΔH4 = -349 kJ/mol

Na+(g) + Cl-(g) → NaCl(s)

ΔH5 = -742 kJ/mol

The enthalpy of formation of NaCl(s) from elemental Na(s) and Cl₂(g) can be calculated using Hess’s law.

Therefore;

ΔH5 = ΔH1 + ΔH2 + ΔH3 + ΔH4

Now, substituting the given data into the above equation we get;

-742 kJ/mol = +108 kJ/mol + 1/2(+121 kJ/mol) + (+496 kJ/mol) + (-349 kJ/mol) + ΔH4

Therefore;

ΔH4 = -75.3 kJ/mol

Thus, the enthalpy of formation of NaCl(s) from elemental Na(s) and Cl₂(g) is given as;

ΔH5 = ΔH1 + ΔH2 + ΔH3 + ΔH4= 108 kJ/mol + 1/2(121 kJ/mol) + 496 kJ/mol - 349 kJ/mol - 75.3 kJ/mol

= -411.65 kJ/mol

Therefore, the enthalpy of formation of NaCl(s) from elemental Na(s) and Cl₂(g) is -411.65 kJ/mol.

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Answer:

Mass

Explanation:

Answer:

Chemical element, metallic, symbol Mg, situated in group IIa in the periodic table, atomic number: 12, atomic weight: 24,312. ... Magnesium is known for a long time as the lighter structural metal in the industry, due to it's low weight and to it's capability of forming mechanically resistant alloys.

Answer:

6.     True or False. The arrow labeled C represents a transfer of chemical energy to mechanical energy. Explain why this is true or false.

a.     This is __False_____ because: Factory uses Mechanical energy with is converted to chemical energy.

7.     True or False. The arrow labeled A represents a transfer of solar energy to chemical energy. Explain why this is true or false.

a.     This is __True_____ because:  Solar energy from the sun is first, then a chemical reaction makes food for the plant.

Explanation:

Change up the spelling, put it in your own words, I didn't use advanced grammar, don't copy and paste, don't get a 0.

Answer: I would choose ice

Ice is the solid state of water, a normally liquid substance that freezes to the slid state at temperatures of 0 °C (32 °F) or lower and expands to the gaseous state at temperatures of 100 °C (212 °F) or higer

Answer:

fire

Explanation:

just my opinion but.

If you have fire you could melt things and it defeats ice and ice is easily melted.

Fire is good in a "battle" too lol.

Specific heat is used to explain why different substances changes the temperature at different rate.

Temperature is a physical quantity which is expressed as quantitatively the perceptions of the coldness and hotness. Temperature is measured with a thermometer.

It is defined as the amount of heat which is used to require to increase the temperature by 1°C.

The SI unit thorough which it is measured is J/ g/ °C.

Let's take an example of specific heat of water which is 4.184J/ g/ °C.

Therefore, specific heat is used to explain why different substances changes the temperature at different rate.

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Let's understand the situation

You are using an oil based paint .We know oil contains hydrocarbons means CH- bonded compound . Hydrocarbons are known as organic compounds and non polar .The thing non polar doesn't matter much but thing organic matters .

Now coming to water ,water contains OH bonding ,a lone pair is present over O which makes water polar . Although water is also known as inorganic compound.

We know that like dissolves like .In that manner Organic compounds are soluble in only organic compounds and not in inorganic compounds like water .Thus oil paint is insoluble in water as particles don't dissolve

Hence to clean the oil you need organic solvents like toulenw,spirit ,Benzyl compounds etc .

If acetanilide is nitrated with access of NO2 and allowed to warm above room temperature, 2,4,6 trinitroacetanilide is formed.

Acetanilide is a ortho para directing group.

Ortho / para directing groups -

Electron donating groups in aromatic ring are called ortho/para groups for electrophilic aromatic substitution. While electron withdrawing halogens are also ortho/para detectors as they have lone pairs of electrons that are shared with the aromatic ring.

since acetanilide is a ortho para directing group, so when it is treated with excess of NO2 and allowed to warm above room temperature, no2 attached to ortho and para position and form 2,4,6-trinitroacetanilide.

So correct option is a. 2,4,6-trinitroacetanilide.

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The structures provided for the isomeric pairs. Isomers are pairs of compounds with the same molecular formula but different structures. 

To determine the number of configurational isomers for each compound, first draw each structure:

4-chloro-3-hexen-2-ol:
The structure of 4-chloro-3-hexen-2-ol contains a double bond between carbons 3 and 4 and an OH group at carbon 2. Since the double bond can have two possible configurations (cis or trans), there are two configurational isomers for this compound.

2,4-hexadiene:
The structure of 2,4-hexadiene contains two double bonds, one between carbons 2 and 3, and another between carbons 4 and 5. Each double bond can have two possible configurations (cis or trans), so there are a total of 2 x 2 = 4 configurational isomers for this compound.

3-chloro-1,4-pentadiene:
The structure of 3-chloro-1,4-pentadiene has a double bond between carbons 1 and 2, another double bond between carbons 4 and 5, and a Cl atom at carbon 3. Since the two double bonds are not adjacent, there are no cis or trans configurations to consider. Therefore, there is only one configurational isomer for this compound.

It seems that the structures provided for the isomeric pairs.

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In the 1H-NMR spectrum of 2-methylbut-2-ene, there are two different proton environments, one for methyl group and another for remaining hydrogens in the molecule.

In 1-bromo-4-chlorobutane, there are three different proton environments, corresponding to the four hydrogens on primary carbon,  two hydrogens on the secondary carbon, and the two hydrogens on tertiary carbon bearing halogens. In trans-2-pentene, there are two different proton environments, one for the terminal methyl group and another for  remaining hydrogens in molecule. The multiplicities of each proton environment in 2-methylbut-2-ene and trans-2-pentene would be a triplet and a quartet, respectively, due to coupling with adjacent hydrogens. The multiplicities of each proton environment in 1-bromo-4-chlorobutane would depend on  exact positions of the hydrogens and their coupling patterns.

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The final temperature of the bomb calorimeter is 30.9°C.

Combustion reactions are those reactions in which a compound completly decompose in to carbon dioxide and water molecule.

The final temperature will be calculated by using the equation:

Q = mc(T₂ – T₁), where

Q = relesed heat from calorimeter = 24kJ = 24000J

m = mass of calorimeter = 1.30kg = 1300g

c = specific heat of calorimeter = 3.41 J/(g°C)

T₁ = initial temperature of calorimeter = 25.5°C

T₂ = final temperature of calorimeter = to find?

On putting all these values on the above equation and calculate for T₂, we get

T₂ = 24000/(1300)(3.41) + 25.5

T₂ = 30.9°C

Hence, correct option is (1) i.e. 30.9°C.

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Answer:

30.9

Explanation:

right on edge 2022

Answer:fluorine

Explanation:

Answer:

The correct option is;

D. Manganese (Mn)

Explanation:

Manganese is very brittle, hard, iron like silvery-gray metal, that is difficult to melt. In air, Manganese slowly disintegrate in a similar manner to iron rusting in water

Manganese and iron have similar chemical and physical properties however manganese is more harder and more brittle than iron

A brittle material is one that easily breaks without deforming elastically

Therefore, manganese, due to its very iron like appearance and brittle nature will be suitable to replace the metal wall and crumble easily when the actor hits it.