why does starch test negative in benedict's assay, even though starch contains a reducing group

- To calculate the length of wire we can use a mathematical Rule of Three:

- So, in this case the length would be:

We can write the math expression as:

Here, L is the length of wire and w is the wire weighs.

The molecular formula of a compound with the empirical formula ch and a formula mass of 78.114 amu is C6H6

The empirical formula is the simplest whole number ration that defines constituent atoms in a species. The molecular formula is always a multiple of the empirical formula.

The simplest whole number ratio of atoms in a compound is the empirical formula of a chemical compound in chemistry. Sulfur monoxide's empirical formula, SO, and disulfur dioxide's empirical formula, S2O2, are two straightforward examples of this idea.

As a result, both the sulfur and oxygen compounds sulfur monoxide and disulfur dioxide have the same empirical formula. They do not, however, have the same molecular formulae, which specify how many atoms are present in each molecule of a chemical compound.

The configuration or quantity of atoms are not mentioned in an empirical formula. It is typical for many macromolecules, such as silicon

Given the above:

molecular formula = n×(empirical formula)

Thus ,

molecular formula = 78.0g mol−1 = n

(12.011+1.00794) gmol−1

n = 78 /12.011 +1.00794 = 6

And

molecular formula = C6H6

Sometimes (but not here!)

molecular formula ≡ empirical formula , i.e. the multiple

n = 1

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Left- and right-handed mirror image molecules are known as stereoisomers. Stereoisomers have the same molecular formula and the same connectivity of atoms, but the arrangement of the atoms in space is different. Stereoisomers are formed due to the presence of a chiral center in the molecule

A molecule is said to be chiral if it has a non-superimposable mirror image. Chiral molecules cannot be superimposed on their mirror image. This means that the left- and right-handed mirror images of a chiral molecule are not identical and are not superimposable on each other. Chiral molecules are very important in the field of biology and pharmacology because they interact differently with other chiral molecules in biological systems and can have different biological activities or therapeutic effects.Most biological molecules, such as amino acids, sugars, and DNA, are chiral. Amino acids and sugars are chiral because of the presence of an asymmetric carbon atom in their structures. DNA is chiral because of the helical structure of its double-stranded form. The handedness of chiral molecules can have significant implications for their biological activity, as the interaction between two chiral molecules can depend on their relative handedness.The study of stereoisomers is important in the field of organic chemistry and biochemistry. Understanding the stereochemistry of molecules is essential for understanding their properties and behavior. Stereoisomers can have different physical properties, such as melting point and solubility, and different biological activities, such as receptor binding and enzyme catalysis.

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Option - a is correct answer, H₂SO₄ is a molecular compound that produces H⁺ ions when dissolved in water.

Molecule-shaped inorganic substances are known as molecular compounds. Examples include common compounds like water (H₂O) and carbon dioxide (CO₂). When compared to ionic compounds like sodium chloride, these compounds are very different (NaCl).

Molecules that have a formula that reflects the number of atoms actually bound together in the molecule make up a molecular compound. The bonds between the atoms are joined to form a distinct shape, which is determined by the bond lengths and angles.

Acid produces proton when there is water present.

H₂SO₄ + H₂O → H₃O⁺ + HSO₄⁻

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EXPLANATION:

Ethanol is commonly known as ethyl alcohol, pure alcohol, grain alcohol, and most importantly it is known alcohol present in alcoholic beverages.

The chemical formula of ethanol is written below as

Ethanol is very soluble in water and also, it has many functions due to the presence of hydroxyl as the functional group.

The next thing is to draw the structure of ethanol

Ethanol act as a fuel because the ethanol molecule contains oxygen, it allows the engine to more completely combust the fuel.

Answer:

Anthropogenic CO2?

i might be wrong

The first beaker will contain a single compound, while another beakers will contains mixture of components.

A mixture is defined as a composition made up of two or more chemical components that do not mix chemically.

It can also be defined as a substance formed by the combination of two or more separate substances that does not result in a chemical reaction.

There are two types of mixture.

Thus, the  first beaker will contain a single compound, while another beakers will contains mixture of components.

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Answer:

buring of paper, burning of wood etc are the examples of chemical change

It is a base because its pH is greater than 7

(not sure about the second sorry!)

Answer:

 ok        ,

Explanation:

     .

Answer:

The carbon footprint of one plastic bottle of mass 23.5 g is 34.390 g.

Explanation:

The carbon footprint of one plastic bottle can be estimated by simple rule of three. That is:

\(x = \frac{23.5\,g}{4100\,g}\times 6000\,g\)

\(x = 34.390\,g\)

The carbon footprint of one plastic bottle of mass 23.5 g is 34.390 g.

Answer:

Doctorate

Explanation:

Answer for PLATO

As per the balanced reaction given, 4 moles of ammonia reacts with 6 moles of NO. Therefore, the number of moles of NO required to react with 2.45 moles of ammonia is 3.46.

Nitric oxide is a covalent compound formed from the electron sharing between nitrogen and oxygen atom. Nitric oxide is a common gas found in atmosphere.

NO reacts with ammonia gas produces nitrogen gas and water as per the balanced chemical equation given. It is clear that 4 moles of ammonia reacts with 6 moles of NO.

The number of moles of NO required to react with 2.45 moles of ammonia is calculated as follows:

number of moles of NO  = 2.45 × 6 /4 = 3.46.

Therefore, 3.46 moles of NO is required to completely react with 2.45 moles of ammonia.

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Answer:

unit formula??

Explanation:

If the iron(III) chloride test gave a pale yellow color, it suggests the presence of a small amount of a compound that contains iron, but not necessarily the desired product.

As for the pale yellow color observed in the iron(III) chloride test, it could be due to the presence of impurities or incomplete reaction. Iron(III) chloride is typically used as a test for the presence of phenols, which produce a purple or violet color when reacted with iron(III) chloride. A pale yellow color suggests that the reaction may not have gone to completion or that the sample may have contained impurities that interfered with the reaction.

What is compound?

A compound is a substance made up of two or more different elements that are chemically bonded together in a fixed ratio.

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Answer:

2024.70 J

Explanation:

The heat capacity of the coffee cup calorimeter can be calculated using the following formula:

q_calorimeter = q_water + q_water_final

where q_calorimeter is the heat absorbed by the coffee cup calorimeter, q_water is the heat lost by the warm water, and q_water_final is the heat gained by the cold water.

First, calculate q_water:

q_water = m_water * c_water * ΔT

where m_water = 25.0 g is the mass of the warm water, c_water = 4.184 J/g°C is the specific heat of water, and ΔT = (40.0°C - 29.5°C) = 10.5°C is the change in temperature.

q_water = 25.0 g * 4.184 J/g°C * 10.5°C = 1057.35 J

Next, calculate q_water_final:

q_water_final = m_water * c_water * ΔT

where m_water = 25.0 g is the mass of the cold water, c_water = 4.184 J/g°C is the specific heat of water, and ΔT = (29.5°C - 20.0°C) = 9.5°C is the change in temperature.

q_water_final = 25.0 g * 4.184 J/g°C * 9.5°C = 967.35 J

Finally, calculate the heat capacity of the coffee cup calorimeter:

q_calorimeter = q_water + q_water_final = 1057.35 J + 967.35 J = 2024.70 J

So the heat capacity of the coffee cup calorimeter is 2024.70 J.

Answer:

H20 +CO2 >H2CO3

Explanation:

Please don't report me just want to help and if this helped please leave a heart.

The chemical reaction that represents a synthesis reaction is C +O2 → CO2.

A synthesis reaction is a type of chemical reaction in which new compounds or substance are formed from the interaction of two elements.

It is the formation of new substances or products.

Therefore, The chemical reaction that represents a synthesis reaction is C +O2 → CO2.

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Answer:

A

Explanation:

........................

Answer:

push or pull i think..okay?

The relative reactivity of various chemical species in redox reactions is predicted using conventional reduction potential tables. The conventional reduction potentials for half reactions, which are chemical

A species receives electrons during a reduction reaction, which lowers the oxidation state of the species. This can happen in a number of situations, including the synthesis of covalent bonds, electrochemical processes, and reactions in organic chemistry. Reduction in electrochemistry takes place at the cathode, where the species being reduced receives electrons, allowing it to acquire electrons and become reduced. In redox reactions, the opposing processes of oxidation and reduction frequently happen concurrently. Both industrial and biological activities, including photosynthesis and respiration, depend heavily  reduction. One example is the extraction of metals from their ores

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Carbon and other types of matter can move through the environment through a combination of physical, biological, and human processes.

Matter, including carbon, can move through an environment in several ways, including:

Diffusion: Diffusion is the movement of particles from an area of high concentration to an area of low concentration. Carbon can diffuse through the air or water from areas where it is more concentrated to areas where it is less concentrated.

Advection: Advection is the movement of matter due to the flow of a fluid, such as air or water. Carbon can be transported through the environment by advection, for example, by wind carrying carbon particles or by water currents transporting dissolved carbon.

Biogeochemical cycling: Carbon can also be cycled through the environment by biological and geological processes. Plants and algae take up carbon dioxide from the air or dissolved carbon from water and convert it into organic matter through photosynthesis. This organic matter can then be consumed by other organisms, leading to the transfer of carbon through the food chain. Carbon can also be stored in soils and sediments for long periods of time.

Human activities: Human activities can also move carbon through the environment. For example, the burning of fossil fuels releases carbon dioxide into the atmosphere, which can then be transported by diffusion and advection. Land-use changes, such as deforestation, can also affect the cycling of carbon through the environment.

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Answer:

In the world? I would say no, but at the same time there are a lot of variables to consider in this. But I'd say no. Just my opinion.

Explanation

Answer:

False the amount of water on earth has decreased over the years

Explanation:

The answers to the two questions are:

1. The percent abundance in the container which has 100 navy, 27 pinto, and 173 black-eyed peas beans is 33.3%, 9.0%, and 57.7% for navy bean, pinto bean, and black-eyed peas beans, respectively.

2. The weighted average score for the scores of 85, 75, 96 obtained from the evaluations of exams (20%), labs (75%), and homework (96%) is 84.1.      

1. The percent abundance by type of bean is given by:

\( \% = \frac{n}{n_{t}} \times 100 \)   (1)

Where:

n: is the number of each type of beans

\(n_{t}\): is the total number of beans

The total number of beans can be calculated by adding the number of all the types of beans:

\( n_{t} = n_{n} + n_{p} + n_{b} \)   (2)

Where:

\( n_{n} \): is the number of navy beans = 100

\( n_{p} \): is the number of pinto beans = 27

\(n_{b} \): is the number of black-eyed peas beans = 173  

Hence, the total number of beans is (eq 2):

\( n_{t} = 100 + 27 + 173 = 300 \)  

Now, the percent abundance by type of bean is (eq 1):

\( \%_{n} = \frac{100}{300} \times 100 = 33.3 \% \)

\( \%_{p} = \frac{27}{300} \times 100 = 9.0 \% \)

\( \%_{b} = \frac{173}{300} \times 100 = 57.7 \% \)

Hence, the percent abundance by type of bean is 33.3%, 9.0%, and 57.7% for navy bean, pinto bean, and black-eyed peas beans, respectively.

2. The average score (S) can be calculated as follows:

\( S = e*\%_{e} + l*\%_{l} + h*\%_{h} \)   (3)

Where:

e: is the score for exams = 85

l: is the score for lab reports = 75

h: is the score for homework = 96

\( %_{e} \)\(\%_{e}\): is the percent for exams = 70.0%

\( \%_{l} \): is the percent for lab reports = 20.0%

\( \%_{h} \): is the percent for homework = 10.0%

Then, the average score is:

\( S = 85*0.70 + 75*0.20 + 96*0.10 = 84.1 \)

We can see that if the score for each evaluation is 100, after multiplying every evaluation for its respective percent, the final average score would be 100.  

Therefore, the weighted average score will be 84.1.

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I hope it helps you!

Answer:

Metallic Bonding

Explanation:

Metallic Bonding

In metallic bonds, the valence electrons from the s and p orbitals of the interacting metal atoms delocalize. That is to say, instead of orbiting their respective metal atoms, they form a “sea” of electrons that surrounds the positively charged atomic nuclei of the interacting metal ions.

The combination of the given components yields -16.5.

To find the combination AV​/2 - 2By​ + 5CV​,

We need to substitute the given components of vectors A, B, and C into the expression.

Given:

Ax​ = 1.0

Ay​ = 2.0

Bx​ = 3.5

By​ = -4.0

Cx​ = -5.0

Cy​ = 6.

Substituting these values into the expression:

AV​/2 - 2By​ + 5CV​ = (Ax/2) - 2(By) + 5(Cx)= (1.0/2) - 2(-4.0) + 5(-5.0)

= 0.5 + 8.0 - 25.0

= -16.5

Therefore, the combination of the given components yields -16.5.

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The proposed solution, which has 10.0 grams of glucose in 100 gram of water, has a freezing point of 1.034 C.

The degree of heat in which a liquid becomes solid. precisely the temperatures at which a material's solid and liquid states are balanced at atmospheric pressure.

If a substance is kept below its freezing point, it may either become more or less dangerous. The freezing point additionally offers an essential safety standard for evaluating the impacts of occupational exposure to cold conditions.

m = molality

i = van 'toff factor,

molality = n/w*t of solvent

n = w*t of Glucose/M* w t

= 10/180*1/0.1

=0.555 w* t

= 1.86*0.555*1

= 1.034

T (solvent) - d= 0-1.034

freezing point = -1.034C

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Answer:

I guess 1-mole carbon dioxide contains 6.02 x 10^23 molecules.

Answer:

Mg

Explanation:

Mg forms 2+ ions and mgcl2 has a melting point over 700°C I believe.

Answer:

genetic mutation or the environmental exposures