Carbohydrates make up 75% of the mass of dried plant material. Cotton is at least 95% carbohydrate. Why do humans not include cotton in their diet?​

Answer:

18g6.02×1023molecules=500gx. 18 g 6.02 × 10 23 molecules = 500 g x .

Explanation:

Answer:

B. through food cycles

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0.361 moles of N₂ were required to produce 12.3 g of NH₃, using the balanced chemical equation N₂ + 3H₂ → 2NH₃.

The balanced chemical equation for the reaction is N₂ + 3H₂ → 2NH₃. We can use the balanced equation and the molar mass of NH₃ to calculate the number of moles of N₂ required to produce 12.3 g of NH₃,

1 mol NH₃ = 2 mol N₂ (from the balanced equation)

molar mass of NH₃ = 17.03 g/mol

moles of NH₃ = 12.3 g / 17.03 g/mol

moles of NH₃ = 0.722 mol

moles of N₂ = (0.722 mol NH₃) / 2

moles of N₂ = 0.361 mol

Therefore, 0.361 moles of N₂ were needed to produce 12.3 grams of NH₃.

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Complete question - For the reaction, N₂ + 3H₂ → 2NH₃. Given 12.3 grams of NH3, how many moles of N₂ were needed?​

Relative atomic mass or atomic weight: is a dimensionless physical quantity defined as the ratio of the average mass of atoms of a chemical element in a given sample to the atomic mass constant.

Its symbol is Ar

Answer:

Answer:

\(\Delta E=-52J\)

Explanation:

Hello!

In this case, since the first law of thermodynamics states that the heat added to system and the work done by the system are able to define the change in the internal energy as follows:

\(Q-W= \Delta E\)

Since this problem shows that the system releases 113.0 J of heat, we use it negative as well as the 61.0 J of work performed on the system; therefore we write:

\(\Delta E=-113.0J+61.0J\\\\\Delta E=-52J\)

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Ammonia (\(NH_3\)) and ammonium chloride (\(NH_4Cl\)) mixture could be a useful buffer in a solution. Option C

A buffer is a solution that can resist changes in pH when small amounts of acid or base are added. It consists of a weak acid and its conjugate base or a weak base and its conjugate acid. The buffer system works by the principle of Le Chatelier's principle, where the equilibrium is shifted to counteract the changes caused by the addition of an acid or a base.

In option A, acetic acid (\(CH_3CO_2H\)) is a weak acid, but hydrochloric acid (HCl) is a strong acid. This combination does not form a buffer because HCl is completely dissociated in water and cannot provide a significant concentration of its conjugate base.

Option B consists of sodium hydroxide (NaOH), which is a strong base, and elemental sodium (Na), which is a metal. This combination does not form a buffer as there is no weak acid-base pair involved.

Option D contains acetic acid (\(CH_3CO_2H\)), a weak acid, and ammonia (\(NH_3\)), a weak base. Although they are weak acid and base, they do not form a buffer system together as they are both weak acids or bases and lack the required conjugate acid-base pair.

Option C, ammonia (\(NH_3\)), is a weak base, and ammonium chloride (\(NH_4Cl\)) is its conjugate acid. This combination can form a buffer system. When ammonia reacts with water, it forms ammonium ions (NH4+) and hydroxide ions (OH-).

The ammonium ions act as the weak acid, while the ammonia acts as the weak base. The addition of a small amount of acid will be counteracted by the ammonium ions, and the addition of a small amount of base will be counteracted by the ammonia, thus maintaining the pH of the solution relatively stable.

Therefore, option C, consisting of ammonia (\(NH_3\)) and ammonium chloride (\(NH_4Cl\)), is the suitable mixture that could be a useful buffer in a solution.

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Answer:

2Fe(NO₃)₃  +  3MgO  →  Fe₂O₃  + 3Mg(NO₃)₂

Explanation:

Given chemical species:

  Reactants:  Iron(III) nitrate

                      Magnesium oxide

 Products:  Iron (III) oxide

                   Magnesium nitrate

The chemical symbols:

   Fe(NO₃)₃  +  MgO  →  Fe₂O₃  + Mg(NO₃)₂

The reaction of this type is called a double displacement reaction.

 Now let us ensure that it is balanced;

         aFe(NO₃)₃  +  bMgO  →  cFe₂O₃  + dMg(NO₃)₂

Conserving Fe;

           a  = 2c

Conserving N;

           3a  = 2d

 Conserving O

            9a  + b  = 3c + 6d

 Conserving Mg

           b  = d

let a  = 1, c  = \(\frac{1}{2}\) , d = \(\frac{3}{2}\), b =  \(\frac{3}{2}\)

 multiply through by 2;

     a = 2, c  = 1, d  = 3 and b  = 3

     2Fe(NO₃)₃  +  3MgO  →  Fe₂O₃  + 3Mg(NO₃)₂

Answer:

Option (2)

Explanation:

The two compounds formed will be AgCl and NaNO₃.

We can see that this will result in a balanced equation, so the answer is Option (2).

Answer:

B) NaNO3 + AgCl (s)

Explanation:

edge 2023

Answer:

An unprocessed chemical is one that is found in nature, such as chemicals from plants, micro-organisms, animals, the earth, and the sea. A synthetic chemical is a chemical that is extracted using a process that does not change its chemical composition but does alter its physical or physiological properties.

Explanation:

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The mass of the zinc that is required is 184.6 g.

We know that the term reaction has to do with the combination of two substances. Often times, we would have a new substances that is formed which is the product of the reaction.

Let us look at the reaction between zinc and copper II sulfate and that reaction is written as; \(Zn(s) + CuSO_{4} (aq) ------ > ZnSO_{4} (aq) + Cu(s)\)

Number of moles of the copper sulfate = 454 g/159.61 g/mol

= 2.84 moles

Now, the reaction is 1:1  we can see;

Number of moles = mass/molar mass

Mass of Zn = 2.84 moles * 65 g/mol

= 184.6 g

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When cyclic ester is reacted with ethyl alcohol in presence of heat and acidic medium, ethyl hexanoate is formed. The structure of ethyl hexanoate is attached in image.

Lactones are the name for cyclic esters. The COOH and OH groups that unite to generate water in these instances are a component of the same molecule.

German chemist Leopold Gmelin likely abbreviated the word "ester" from the German Essigäther, "acetic ether," when he first used it in 1848.

First, carbonyl oxygen abstracts a proton. The production of an ester on one side of the chain and alcohol on the other follow the attack of the ethyl molecule on the carbonyl carbon.

Thus, ethyl hexanoate is formed as a product.

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Answer:

In a chemical change, the atoms in the reactants rearrange themselves and bond together differently to form one or more new products with different characteristics than the reactants. When a new substance is formed, the change is called a chemical change.

Explanation:

Answer:what

Explanation:

Answer:

Explanation:

The density of a substance can be found by using the formula

\(density = \frac{mass}{volume} \\\)

From the question

mass = 555 g

volume = 250 cm³

We have

\(density = \frac{555}{250} = \frac{111}{50} \\ \)

We have the final answer as

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Answer:

C. Strong nuclear force.

Explanation:

First, let's review the definitions of the given concepts of the group of answer choices:

- Electrostatic force: It's the interaction that occurs between electrically charged particles (positive and negative charges).

- Force of gravity: is a fundamental interaction where there is a mutual attraction between all things that have mass or energy.

- Strong nuclear force: is what keeps nuclei together (protons and neutrons together).

- Weak nuclear force: this force is responsible for particle decay.

Based on these definitions, the force that holds the nucleus together would be C. Strong nuclear force.

Answer:

Explanation:

Determine the treatments you’ll be using on your eggs, and prepare the substances you’ll need. You can make salt-water solutions by dissolving different amounts of table salt in containers of water (e.g. 100g, 200g, 300g of salt (NaCl) per liter). You can make solutions of food coloring by adding a few drops of each color into containers of  

The Eggsperiment with Vinegar solution. The first experiment conducted was the egg placed in vinegar solution which allowed the egg to become soft and bouncy . Vinegar is a weak acid which is 5% acetic acid in water (meaning vinegar is largely just water). The egg has a shell that is made up of calcium carbonate   an air cell forms at the large end of the egg. While the embryo is growing, the shell membranes surround and contain the white or albumen of the egg. The albumen provides the liquid medium in which the embryo develops, and it also contains a large amount of the protein necessary for proper development. I hope this was hopeful

The ribbon after three complete vibrations will be in the first loop, in the same place as when it started. It is fundamental to understand waves.

A wave can be defined as a type of disturbance that extends from a given site to another through space.

Moreover, light and sound can be considered vibrations capable of moving through space.

In this case, the motion of a ribbon is in a direction transversal to the direction of propagation of the wave.

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The amount, in kJ, of heat needed to completely vaporize 50.0g of water at 100°C is 118.8 kJ.

The heat needed to completely vaporize 50.0g of water at 100°C can be calculated using the following formula:

q = m x Hv

where:

First, we need to convert 50.0g to moles by dividing by the molar mass of water which is approximately 18.015 g/mol3:

moles of water = 50.0 g / 18.015 g/mol moles of water = 2.776 mol

Thus:

q = (2.776 mol) x (40.65 kJ/mol) q = 112.8 kJ

In other words, 112.8 kJ of heat is needed to completely vaporize 50.0g of water at 100°C.

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Answer:

Explanation:

λ  =  \(10^8\)   meters

Explanation:

f : frequency

c :  velocity of light

λ  : wavelength

f  =  c/λ

λ  =  c /f

c  =  2.99  ⋅ \(10^8\) m/ s

λ  =  \(10^8\) meters

The percent by mass of nitrogen in ammonia (NH3) is approximately 82.15%

Calculating the mass of nitrogen to the total mass of the compound and then expressing the result as a percentage will allow us to determine the percent by mass of nitrogen in NH3 (ammonia).

Ammonia's molecular structure, NH3, indicates that it is made up of one nitrogen atom (N) and three hydrogen atoms (H). We must take both the molar masses of nitrogen and ammonia into account when calculating the percent by mass of nitrogen.

Nitrogen's (N) molar mass is roughly 14.01 g/mol. The molar masses of nitrogen and hydrogen are added to determine the molar mass of ammonia (NH3). Since hydrogen's molar mass is around 1.01 g/mol, ammonia's molar mass is:

(3 mol H 1.01 g/mol) + (1 mol N 14.01 g/mol) = 17.03 g/mol = NH3.

Now, we can use the following formula to get the nitrogen content of ammonia in percent by mass:

(Mass of nitrogen / Mass of ammonia) / 100% is the percentage of nitrogen by mass.

Ammonia weighs 17.03 g/mol and contains 14.01 g/mol of nitrogen by mass. By entering these values, we obtain:

(14.01 g/mol / 17.03 g/mol) 100% 82.15 % of nitrogen by mass

Ammonia (NH3) has a nitrogen content that is roughly 82.15 percent by mass.

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The largest effect on the population of trout in Wisconsin was caused by the introduction of non-native species into the ecosystem.

The introduction of non-native species into an ecosystem can cause a disruption in the food chain, leading to a decrease in the population of native species. In Wisconsin, the introduction of non-native species such as the brown trout and rainbow trout has had a significant impact on the population of native brook trout.

The non-native species compete with the native brook trout for food and habitat, which has led to a decrease in the brook trout population. This highlights the importance of preserving the natural balance of ecosystems and avoiding the introduction of non-native species.

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a. The chemical equation for the electrolysis of water is:

2H2O(l) → 2H2(g) + O2(g)

b. The gas obtained at the anode during the electrolysis of water is oxygen (O2).

c. The volume of gas obtained at the anode is 0.002232 moles or approximately 0.05 L of oxygen gas.

a. The chemical equation for the electrolysis of water is:

2H2O(l) → 2H2(g) + O2(g)

b. The gas obtained at the anode during the electrolysis of water is oxygen (O2).

c. According to the balanced chemical equation, for every 2 moles of water (H2O) electrolyzed, 1 mole of oxygen gas (O2) is obtained. Since 1 mole of any gas occupies 22.4 L at standard temperature and pressure (STP), we can use the stoichiometry of the reaction to determine the volume of oxygen gas produced.

Given that 50 cm³ of gas is obtained at the anode, we need to convert this volume to liters:

50 cm³ = 50/1000 L = 0.05 L

Using the stoichiometric ratio of the balanced equation, we find that 2 moles of water produce 1 mole of oxygen gas. Therefore, 0.05 L of oxygen gas is equivalent to:

0.05 L × (1 mole/22.4 L) = 0.002232 moles

Thus, the volume of gas obtained at the anode is 0.002232 moles or approximately 0.05 L of oxygen gas.

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The molecular weight of unknown gas : 23.46 g/mol

Given

A vessel contains 10% of oxygen and 90% of an unknown gas.

diffuses rate of mixed gas = 86 s

diffuses rate of O₂ = 75 s

Required

the molecular weight of unknown gas (M)

Solution

The molecular weight of mixed gas :(M O₂=32 g/mol)

\(\tt 0.1\times 32+0.9\times M=3.2+0.9M\)

Graham's Law :

\(\tt \dfrac{r_{O_2}}{r_{mixed~gas}}=\sqrt{\dfrac{M_{mixed}}{M_{O_2}} }\\\\\dfrac{75}{86}=\sqrt{\dfrac{3.2+0.9M}{32} }\\\\0.76=\dfrac{3.2+0.9M}{32}\\\\24.32=3.2+0.9M\\\\21.12=0.9M\rightarrow M=23.46~g/mol\)

Answer:

Yes, displacement is 45 meters, time is three seconds, and the direction is toward the goal. Velocity is 15 m/s towards the goal.

Explanation:

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1mol H_2O requires 44kJ heat

Moles of water

Heat required

As per the reaction given

Moles of H_2O=1

Moles of water in 9g

∆H

Answer:

0.00133 g/cm^3 or 28.97 g/mol.

Explanation:

To solve the problem, we'll need to use the ideal gas law: PV = nRT

Where:

P = Pressure (we'll assume atmospheric pressure, since it's not specified in the problem)

V = Volume (1.05 x 10^3 cm^3)

n = moles of gas

R = Gas Constant (0.08206 L.atm/K.mol)

T = Temperature (25 + 273.15 K = 298.15 K)

First, let's find the mass of the gas alone:

Mass of gas = Mass of container + gas - Mass of container Mass of gas = 837.6 g - 836.2 g

Mass of gas = 1.4 g

Next, we need to find the number of moles of gas:

n = m/M

where: m = mass of gas (1.4 g) M = molar mass of the gas (unknown)

We don't know the molar mass of the gas yet, so let's rearrange the ideal gas law to solve for it:

M = m/ (n/V) RT

Substitute the values we know so far:

M = 1.4 g / [(n/V)RT]

We'll need to find n/V to substitute into the equation. This can be found using the density formula:

Density = mass/volume

Rearrange the formula to solve for n/V:

n/V = Density / Molar mass

Substitute the values we know:

Density = mass/volume = 1.4 g / 1.05 x 10^3 cm^3

Density = 0.00133 g/cm^3

Substitute this value into the formula to find n/V: n/V = 0.00133 g/cm^3 / M

Substitute n/V into the equation to solve for M: M = 1.4 g / [(0.00133 g/cm^3 / M) (0.08206 L.atm/K.mol) (298.15 K) (1 cm^3 / 1 x 10^-6 L)]

Simplifying this equation gives: M = 28.97 g/mol

Therefore, the molar mass of the gas is approximately 28.97 g/mol.

The structural formula of butanol is C4H9OH. It consists of a chain of four carbon atoms, with a hydroxyl (-OH) group attached to one of the carbon atoms. Butanol has several structural isomers, which have the same molecular formula but different structural formulas.

A structural isomer is a compound that has the same molecular formula as another compound but has a different arrangement of its atoms. A string of 4 C atoms are bonded above, below, left, and right to H, except the second C, which is bonded below to O, which is bonded below to H is a structural isomer of butanol.

This is called butan-2-ol. The structural formula of butan-2-ol is CH3CH(OH)CH2CH3. In this isomer, the hydroxyl group is attached to the second carbon atom in the chain, whereas in butanol, the hydroxyl group is attached to the first carbon atom in the chain.

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Answer:

It is A.

Explanation:

I hope this helps have a great day.

Answer:

A

Explanation:

an individual that produces sperm and an individual that produces eggs

you need egg and sperm for a new offspring aka a zygote

Answer:

1.765x10²⁵ molecules

Explanation:

First we convert 7.328 moles of propane (C₃H₈) into moles of H₂O, using the stoichiometric coefficients of the balanced reaction:

Then we convert 29.312 moles of H₂O into molecules, using Avogadro's number:

Answer:

Neon-20 would be the most abundant isotope among the three.

Explanation:

The relative atomic mass of an element is the average of the relative isotope mass of its naturally-occurring isotopes, weighted according to the relative abundance of each isotope.

The relative isotope mass of an isotope atom is approximately the same as its mass number. The relative isotope mass of one neon-20 atom is approximately \(20\). Similarly, the relative isotope mass of one neon-21 atom and one neon-22 atom will be \(21\) and \(22\), respectively.

The relative atomic mass of neon is approximately \(20.180\) (as seen on a modern periodic table.) This number is supposed to be the weighted average of the relative isotope mass of neon-20, neon-21, and neon-22 according to their relative abundance.

If the three isotopes were to have a relatively equal abundance, then the relative atomic mass of neon should be very close to \(21\). However, that's not actually the case. The commonly-accepted relative atomic mass of neon, \(20.180\), is significantly tilted towards \(20\), which is the (approximate) relative isotope mass of neon-20.

The question assumes that neon-20, neon-21, and neon-22 are the only three naturally-occurring isotopes of neon. In other words, there's no naturally-occuring isotope of neon with an isotope mass smaller than that of neon-20. Based on that assumption, neon-20 must have been considerably more abundant than the heavier neon-21 and neon-22 to ensure that weighted average \(20.180\) is much smaller than the relative isotope mass of neon-21 and neon-22.