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Answer:

Explanation:

To show the reactants and products, write the imbalanced equation.

Calculate the number of atoms of each element on each side of the reaction arrow.

To make the number of atoms of each element the same on both sides of the equation, multiply coefficients (the numbers in front of the formulas). ...

Check your work by indicating the state of matter of the reactants and products.

A cyclic diallylamine called 1-ethyl-3-methylcyclohexane is a feedstock used to create methicillin-resistant Staphylococcus aureus (MRSA).

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Name of Pb(NO3 )2 is Lead(II) nitrate.

Pb(NO3)2 is ionic as well as covalent

Pb is the symbol of lead and NO3  is a complex ion called nitrate. It has one nitrogen and three oxygens. Pb(NO3)2 is ionic as well as covalent. NO3 is covalent in nature because both nitrogen and oxygen are non-metals and therefore an ionic bond cannot be formed between them.

Ionic compounds are formed when a metal reacts with a nonmetal whereas covalent compounds are formed when two non -metals react with each other. Binary compounds containing hydrogen are usually covalent compounds as hydrogen is a non - metal.

An ionic bond  donates an electron to the other atom in the bond whereas electrons in a covalent bond are shared equally between the atoms.

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Answer:

what

Explanation:

To reach the create an object with symmetry, 184 mL of base, LiOH have been needed.

Chemicals that react with hydrogen atoms to neutralize acids are known as bases. The bulk of bases are composed of minerals, which react with acids to form water and salts. As examples of bases, consider the metal oxides, hydroxides, and calcite. The soluble bases are the alkalis.

One of the core units that can be used to create other units in a measurement system that relies on a phenomena or accepted norm. The metre, kilogram, second, ampere, farenheit, mole, and candela are the foundational elements of the World System of Units.

Acid volume, HCOOH (Vi) = 69.0 mL

Acid molarity is HCOOH (Milliamperes) = 0.4 M.

LiOH (Mb) has a molarity of 0.150 M.

MaVa / MbVb = nA / nB

(0.4 × 69) / (0.150 × Vb) = 1

27.6 / (0.150 × Vb) = 1

0.150 × Vb = 27.6

Divide both side by 0.150

Vb = 27.6 / 0.150

Vb = 184 mL

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The equilibrium constant has a definite value for every reversible reaction at a particular temperature. However it varies with change in temperature and it is independent of the initial concentration of the reactants. Here the expression of K is [CO][Cl₂]/[CoCl₂]. The correct option is C.

The ratio of the product of the molar concentrations of the products to that of the reactants with each concentration term raised to a power equal to its coefficient in the balanced chemical equation is called the equilibrium constant.

Here the equilibrium constant for the reaction is:

K = [CO][Cl₂]/[CoCl₂]

Thus the correct option is C.

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The presence of coliform bacteria in water can be an indicator of potential fecal contamination and the possible presence of pathogenic bacteria. However, it does not necessarily mean that the water is contaminated with a pathogenic pollutant, and further testing may be required to confirm the presence of harmful bacteria.

Coliform bacteria are a group of bacteria that are commonly found in the environment, including in soil, vegetation, and animal feces. While most coliform bacteria are not harmful, their presence in water can indicate that the water may be contaminated with fecal matter or other pathogens that can cause illness.

The presence of coliform bacteria in water is an indicator of potential contamination, rather than a direct measurement of pathogenic bacteria. Coliform bacteria are often used as a surrogate indicator for the presence of pathogenic bacteria in water, as they are easier and less expensive to detect than many pathogenic bacteria.

However, positive coliform results do not always mean that a water source is contaminated with a pathogenic pollutant. There are several reasons why this might be the case:

1. The coliform bacteria detected may not be fecal in origin: While coliform bacteria are commonly associated with fecal contamination, they can also be present in soil, vegetation, and other environmental sources. Therefore, the presence of coliform bacteria in water may not necessarily indicate fecal contamination.

2. The source of contamination may not be human or animal: Coliform bacteria can also be present in natural sources of water, such as streams and lakes, as well as in agricultural runoff and other non-human sources.

3. The pathogenic bacteria may not be present in sufficient numbers to be detected: While the presence of coliform bacteria in water can indicate potential fecal contamination, it does not guarantee the presence of pathogenic bacteria. Pathogenic bacteria may be present in such small numbers that they are not detectable by standard testing methods.

4. Other factors may be affecting the test results: Environmental factors such as temperature, pH, and nutrient availability can all affect the growth and detection of coliform bacteria in water. Therefore, test results may be affected by factors other than the presence of fecal contamination.

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Answer:

There is no bar graph attached to this question, however, the question can be answered based on the information given in the question.

The answer is A) average level of happiness

Explanation:

In an experiment, the dependent variable is the variable which is measured by the experimenter. It is the variable that responds to changes made to another variable called independent variable.

In the case of this question, it can be determined, even without the bar graph, that the experiment entails how candy allowance affects a child's happiness. Hence, the candy allowance is changed to influence or cause a response in the child's happiness, which is then measured. Therefore, the AVERAGE LEVEL OF HAPPINESS is the dependent variable.

Answer:Atomic radius gets bigger

Explanation:

Atomic radius bigger because not only do the atoms have more and more protons and neutrons, and thus more mass in general, there is also stronger shielding affect. Shielding affect is when electrons closer to the nucleus block the positive charge from reaching electrons farther from the nucleus, and thus those far electrons are not drawn towards the nucleus as strongly, and spread out more, increasing atomic radius.

Answer:

Chromium is a chemical element with symbol Cr and atomic number 24. Classified as a transition metal, Chromium is a solid at room temperature

Explanation:

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Answer:

The proportion of carbon and oxygen is different in different samples of the gas.

The ammonium ion is formed when ammonia accepts a proton from an acid.

The term conjugate acid  refers to a specie that is formed when a base accepts a proton. The conjugate acid of ammonia is the ammonium ion.

This is because, the ammonium ion is formed when ammonia accepts a proton from an acid.

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Taking into account the definition of molarity, the molarity of a solution that contains 0.75 moles of solute in 0.250 L of solution is 3 moles/L.

Molarity is a measure of the concentration of a solution expressed in the number of moles dissolved per liter of solution.

In other words, molarity indicates the number of moles of solute that are dissolved in a given volume.

The molarity of a solution is calculated by dividing the moles of solute by the volume of the solution:

molarity= number of moles of solute÷ volume of solution

Molarity is expressed in units moles/L.

In this case, you have:

Replacing in the definition of molarity:

molarity= 0.75 moles÷ 0.250 L

Solving:

molarity= 3 moles/L

Finally, the molarity is 3 moles/L.

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Nitinol, a shape memory alloy, is unique in its response to temperature compared to other metals.

Nitinol is composed of a nickel-titanium (Ni-Ti) alloy and exhibits a phenomenon called shape memory effect and superelasticity. These properties arise from the unique crystal structure and phase transitions of the alloy.

One key characteristic of Nitinol is its ability to undergo a reversible transformation between two crystal structures, known as austenite and martensite, in response to temperature changes. The transition temperature at which this transformation occurs is called the martensitic transformation temperature.

At temperatures below its martensitic transformation temperature, Nitinol exhibits a soft and easily deformable martensitic phase. However, when heated above its transformation temperature, Nitinol rapidly reverts to its rigid and predefined shape of the austenitic phase.

This temperature-dependent behavior of Nitinol is in contrast to other metals that do not exhibit such reversible shape memory effects or superelasticity. While most metals undergo gradual changes in their physical properties with temperature, Nitinol's unique alloy composition allows it to exhibit significant and reversible changes in shape and mechanical properties based on temperature fluctuations.

The distinct response of Nitinol to temperature makes it a valuable material in various applications, including biomedical devices, aerospace engineering, and robotics.

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The splitting apart of an ester in the presence of a strong acid and water is called hydrolysis.

In this process, an ester reacts with water under acidic conditions, breaking the ester bond and forming a carboxylic acid and alcohol as the products. This is different from saponification, neutralization, esterification, and reduction, which are other types of chemical reactions involving esters or related compounds.

Saponification is a type of hydrolysis that involves the hydrolysis of an ester under basic conditions. Neutralization is the reaction between an acid and a base to form salt and water. Esterification is the formation of an ester from a carboxylic acid and an alcohol. Reduction is the gain of electrons or decreases in an oxidation state of a molecule or ion.

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The splitting apart of an ester in the presence of a strong acid and water is called hydrolysis.

In this process, an ester reacts with water under acidic conditions, breaking the ester bond and forming a carboxylic acid and alcohol as the products. This is different from saponification, neutralization, esterification, and reduction, which are other types of chemical reactions involving esters or related compounds.

Saponification is a type of hydrolysis that involves the hydrolysis of an ester under basic conditions. Neutralization is the reaction between an acid and a base to form salt and water. Esterification is the formation of an ester from a carboxylic acid and an alcohol. Reduction is the gain of electrons or decreases in an oxidation state of a molecule or ion.

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Answer:

this reaction is so the answer should be A

At rest, K+ concentrations are higher inside neurons. K+ has the propensity to migrate out of the neuron down the concentration gradient because it can freely pass the neuronal membrane.

The inside of the cell contains more potassium ions than the outside does. The system as a whole is electrically neutral because an anion balances out each potassium ion (on either side of the membrane). As a result, there is a high concentration of sodium ions outside the cell and a high concentration of potassium ions inside. Additionally, the neuronal membrane contains specialized proteins known as channels that create gaps in the membrane that are only permeable to certain ions.

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[\(H^{+}\)] value of soft drink is 0.0001mol/l when given pH is 4.

Given:

pH = 4

Needs to find: [\(H^{+}\)]

Formula to find: pH=−log\(_{10}\) [\(H^{+}\)]

We can put the values of pH in above formula as,

pH=−log\(_{10}\) [\(H^{+}\)]

4 =−log\(_{10}\) [\(H^{+}\)]

To calculate hydonium ion concentration, formula is as follows;

[\(H^{+}\)] = \(10^{-pH}\)

[\(H^{+}\)] = \(10^{-4}\) = 0.0001mol/l

[\(H^{+}\)] value of soft drink is 0.0001mol/l

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Answer:

Explanation:

molecules NH3 = 1.47 moles x 6.02x1023 molecules/mole = 8.9x1023 molecules of NH3

Answer:

kinectic energy of all its molecules

A physical property can be observed and do not change the identity of the substance.

So for one of them, you could say something along the lines of "The shape of the sugar changed." You could say this because it does not change the identity of the sugar, and the physical properties of the sugar itself have changed.

For the other, you could say something along the lines of "The mass of the sugar would change." This would also work because when sugar is dissolving, it loses more and more sugar after a while, thus reducing the mass.

Note: Please feel free to tell me if you think I messed up on any of these. I also want to learn more about this and want to be as accurate as possible. Have a good day!

Answer:

chemical synthesis or chemical property

Explanation:

Answer:

6) 225.8 g

7) 1.01 g

8) 21.624 g

Explanation:

6) Molar Mass of Lithium Bromine: 86.845

86.845 * 2.6 = 225.8 g

7) Molar Mass of Neon: 20.180

20.180 * 0.05 = 1.01 g

8) Molar Mass of Water Vapor: 18.02

18.02 * 1.2 = 21.624 g

The amount of H2S formed in the reaction of 0.4 mol of HCl with excess Sb2S3 is 1.2 moles.

To calculate the amount of H2S formed when 0.4 mol of HCl reacts with excess Sb2S3, we need to use the balanced equation for the reaction:

Sb2S3 + 6HCl -> 2SbCl3 + 3H2S

From the balanced equation, we can see that for every mole of Sb2S3, 3 moles of H2S are produced.

We have the number of moles of HCl which is 0.4 mol, and we know that HCl is in excess. So we can assume that the reaction is limited by the amount of Sb2S3.

Therefore, the number of moles of H2S produced is:

0.4 mol Sb2S3 × (3 mol H2S / 1 mol Sb2S3) = 1.2 mol H2S

So, the amount of H2S formed in the reaction is 1.2 moles.

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1.905 M is the concentration in m (moles/l) of a solution that is 12.0% by weight of nitric acid.

To calculate the concentration in moles per liter (M) of a 12.0% by weight nitric acid (HNO₃) solution, follow these steps:
1. Determine the molecular weight of HNO₃:
HNO₃ = 1 (H) + 14 (N) + 3 × 16 (O) = 1 + 14 + 48 = 63 g/mol
2. Convert the percentage concentration to a mass concentration:
12.0% by weight means that there are 12.0 g of HNO₃ in 100 g of solution.
3. Calculate the moles of HNO₃ in the 100 g solution:
moles = mass / molecular weight
moles = 12.0 g / 63 g/mol = 0.1905 mol
4. Determine the volume of the solution:
Assume that the density of the solution is close to that of water, which is 1 g/mL.
Since there are 100 g of solution, the volume would be approximately 100 mL or 0.1 L.
5. Calculate the concentration in moles per liter (M):
concentration (M) = moles / volume
concentration (M) = 0.1905 mol / 0.1 L = 1.905 M
The concentration of the solution is approximately 1.905 M.

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The semi-crystalline polymer of the same composition, a completely amorphous polymer is expected to the crystallites scatter light.

Crystallization of polymers is a manner associated with the partial alignment of their molecular chains. these chains fold together and shape ordered areas called lamellae, which compose larger spheroidal systems named spherulites.

Semi-crystalline plastics can be taken into consideration for a selection of applications. choosing a plastic material for use in excessive temperature surroundings calls for a cautious assessment of fabric residence information. View our interactive Thermoplastics Triangle to evaluate substances.

Polyethylene is a partially crystalline solid whose residences are exceedingly dependent on the relative content of the crystalline section and amorphous section, i.e., crystallinity. Polyethylene is a polymer polymerized from monomeric ethylene.

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The mole ratio between sodium bicarbonate and that of acetic acid is 1:1

A mole ratio can be defined as that ratio in whole numbers between the amounts in moles of any two compounds involved in a balanced chemical reaction.

In conclusion, the mole ratio between sodium bicarbonate and that of acetic acid is 1:1

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