3. why is a solid used as the primary standard? discuss your answer in the context of significant figures for solid vs. liquid measurements. (2 points)

Reducing or eliminating the usage or manufacture of hazardous compounds is the main goal of "green chemistry" in industrial production. A branch of chemistry is known as "green chemistry,"

often known as "sustainable chemistry," is concerned with developing goods and procedures that reduce or completely do away with the usage and production of hazardous compounds. Green chemistry is concerned with how chemicals affect the environment as opposed to environmental chemistry, which is concerned with how chemicals affect nature. The output of the industrial sector of the economy is measured by industrial production. Manufacturing, mining, and utilities all fall within the industrial sector. Although these industries only make up a minor fraction of the GDP, they are quite susceptible to interest rates and consumer demand.

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Answer:

The volume of O2 is 7.11L.

Explanation:

1st) It is necessary to balance the chemical reaction:

The reaction is balanced, because there is the same amount of each element in both sides of the reaction.

2nd) From the balanced reaction, we know that from 2 moles of hydrogen peroxide (H2O2), 1 mole of oxygen gas is produced. Now, using the molar mass of hydrogen peroxide (34g/mol), we can calculate the number of moles of O2 that will be produced from 28g of H2O2:

- Conversion from grams to moles:

- Number of moles of O2 produced:

3rd) Finally, we can calculate the volume of O2 using the Ideal Gases formula, replacing the values of pressure (2.0atm), number of moles (0.41moles) and temperature (150°C=423K):

Remember that to use the Ideal Gases formula, the units must be: atm, liter, mol and Kelvin.

So, the volume of O2 is 7.11L.

The structure for 5-chloro-2-propyl-1-heptanol can be drawn by drawing a 7 carbon chain with (OH) functional group on C1, adding propyl group on C2 and  Cl on C5                                  

5-Chloro-2-propyl-1-heptanol is an organic compound that belongs to the class of alcohols.

The IUPAC name of the compound is 5-chloro-2-propylheptan-1-ol, which denotes the position of the hydroxyl group on the carbon chain. The prefix "heptan-" refers to the seven-carbon chain, and the suffix "-ol" denotes the presence of an alcohol functional group (-OH).

5-Chloro-2-propyl-1-heptanol is a colorless to pale yellow liquid with a strong odor. It is a primary alcohol. It is a versatile chemical intermediate that can be used to prepare a variety of other compounds, including pharmaceuticals, agrochemicals, and flavors. It is also used as a solvent and a reagent in organic synthesis

Thus, the structure for 5-chloro-2-propyl-1-heptanol can be drawn by drawing a 7 carbon chain with (OH) functional group on C1, adding propyl group on C2 and  Cl on C5  

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The Proteins are often made up of contiguous regions that show specific, coherent patterns of folding or function.

These regions are called domains. Domains are typically composed of 40 to 350 amino acids, and they can be folded independently of the rest of the protein.

Domains are often responsible for specific functions, such as binding to other molecules or catalyzing chemical reactions.

The terms oligomers, peptides, sites, and subunits are all related to proteins, but they have different meanings. Oligomers are proteins that are made up of multiple subunits.

Peptides are short chains of amino acids. Sites are specific locations on a protein that can interact with other molecules. Subunits are the individual polypeptide chains that make up a protein.

Domains are the specific regions of a protein that are responsible for its structure and function.

Other terms related to proteins, such as oligomers, peptides, sites, and subunits, have different meanings.

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The function y = |x| - 3 is translated 3 units downward from the parent function.

The parent function of y = |x| is the absolute value function. The function y = |x| - 3 is obtained by subtracting 3 from the parent function.

we make a comparison in order to determine the translation of the function, it to the parent function.

In the question,  the translation is in the vertical direction and because  we subtract 3 from the parent function, the graph of y = |x| - 3 is shifted downward by 3 units compared to the parent function y = |x|.

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Answer:

C. 1,500 kg · m/s

The product of the reaction when 1-bromobutane is exposed to magnesium, followed by acetone and then aqueous acid is 2-Methyl-2-hexanol.

What is a chemical reaction?

In a chemical reaction, one or more substances—also known as reactants—are changed into one or more additional substances—also known as products.

1-Bromopropane (n-propylbromide or nPB) is an organobromine compound with the chemical formula CH₃CH₂CH₂Br.

CH₃CH₂CH₂Br + Mg → CH₃CH₂CH₂MgBr

When 1-bromobutane reacts with magnesium in ether, a Grignard reagent is created.

With carbonyl compounds, the Grignard reagent reacts to produce the corresponding alcohols.

When formaldehyde is the carbonyl compound, primary alcohols are produced.

When an aldehyde other than formaldehyde is the carbonyl compound, secondary alcohols are produced.

Grignard reagents and ketones react to produce tertiary alcohols.

Given that the carbonyl compound in question is Acetone (ketone), the result will be a tertiary alcohol.

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Hydrogen gas is represented by the symbol H2. In the production of hydrogen gas, the equation will involve reactants that will undergo a chemical reaction to form hydrogen gas. The reaction will be balanced so that the number of atoms on each side of the equation will be equal.

The balanced chemical equation that represents the production of hydrogen gas can be represented as follows: 2H2O(l) → 2H2(g) + O2(g)In this equation, water (H2O) is the reactant that will undergo a chemical reaction to produce hydrogen gas (H2) and oxygen gas (O2).

The coefficient 2 in front of the H2O indicates that two molecules of water are required to produce two molecules of hydrogen gas and one molecule of oxygen gas. The production of hydrogen gas is an important industrial process that has a wide range of applications, including in the production of ammonia for fertilizers and in the production of methanol for fuels.

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Answer:

Explanation:

A

Answer:

Explanation: I also have a question if anyone can help in chem please

Answer:

The charge of an element is equal to the number of protons minus the number of electrons. The number of protons is equal to the atomic number of the element given in the periodic table. The number of electrons is equal to the atomic number minus the charge of the atom.

Explanation:

The correct options for blank 1, 2, 3 and 4 are mineral oil, combine with, combine with and combine with respectively.

To determine the layers in a separation of organic and aqueous solutions, you can add a small amount of mineral oil to the top. If the top layer is aqueous, the addition will combine with the top layer. If the bottom layer is aqueous, the addition will combine with the top layer and combine with the bottom layer.

You can sprinkle some mineral oil on top of the mixture to help you identify the layers. Due to its immiscibility with water, mineral oil is a non-polar liquid that forms a separate layer on top of aqueous solutions. You clearly define the division between the organic and aqueous phases by adding mineral oil.

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The  percentage abundance of Mass of N-14 is 99.6 % while the percentage abundance of N-15 is 0.4%.

We know that an element is composed of several isotopes. The isotopes of an element has the same atomic number but different mass numbers. The reason for the difference in the mass number of the elements is the fact that the elements do not have the same number of neutrons.

Now we have the following information;

Mass of  N-14 = 14.0031 amu

Mass of  N-15 = 15.001 amu

Atomic mass of nitrogen = 14.00674 amu

Let the percentage abundance of Mass of  N-14 be x and the percentage abundance of N-15 be 1 - x

We now have;

14.00674 =  14.0031x + 15.001(1 - x)

14.00674 =  14.0031x + 15.001 - 15.001x

14.00674 -  15.001 =  14.0031x - 15.001x

-0.9943 = -0.9979x

x = 0.996

Hence;

percentage abundance of Mass of  N-14 =0.996  or 99.6 %

percentage abundance of N-15 = 1 - 0.996 = 0.004 or 0.4%

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Answer:

Nonbiodegradable substance

The two ways in which the physical state of matter can be changed are melting and freezing.

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Answer:

Normally, it explains that matter cannot be created or destroyed. It demonstrates different chemical reactions that help show the different transformations of the matter but will never destroy it or create it.

Answer:

they're a non renewable source

Explanation:

Coal and petroleum, are formed by the deposit of organisms that have died a million years ago. under pressure and high temperature underground the dead organisms that used to live millions of years ago are formed into petroleum. however, coal is formed by the deposit of dead plants in the same process as petroleum. for the formation of petroleum and coal it takes a long term of time for it to be formed (millions of years). and that's why its limited

Answer:

Hi!!

Coal and petroleum deposits in the earth are limited.

They are non renewable resources. They are formed after a long period. They are formed by the remains of dead plants and animals present deep inside the earth crust. It took millions of years to get converted into coal and petroleum.

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Answer:

3.0 moles of C6H6 can produce 18.0 moles of carbon dioxide.

Explanation:

To determine the moles of carbon dioxide (CO2) produced from the reaction of 3.0 moles of C6H6, we need to refer to the balanced chemical equation for the reaction. Since the equation is not provided, let's assume the combustion reaction of benzene (C6H6) to produce carbon dioxide and water:

C6H6 + O2 -> CO2 + H2O

From the equation, we can see that for every 1 mole of C6H6, 6 moles of CO2 are produced. Therefore, if we have 3.0 moles of C6H6, we can calculate the moles of CO2 using the mole ratio:

3.0 moles C6H6 x (6 moles CO2 / 1 mole C6H6) = 18.0 moles CO2

So, 3.0 moles of C6H6 can produce 18.0 moles of carbon dioxide.

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The molecular formulas of maleic and fumaric acids are identical, but fumaric acid is a trans isomer while maleic acid is a cis isomer. The two acids have different physical properties even though they have the same molecular structure.

The melting point of fumaric acid is higher than that of maleic acid. In this case, polarity is much less critical than intermolecular hydrogen bonding in determining the relative stability of the crystal lattice and, consequently, the melting temperature of both acids. The carboxyl groups in fumaric acid can hydrogen bond with their neighbors, whereas the carboxyl groups in maleic acid form an intramolecular hydrogen bond. It requires more effort to break the bonds in the trans isomer than in the cis isomer because of the efficient packing structure of fumaric acid. Since fumaric acid has strong intermolecular forces, its melting point is higher.

The cis configuration, dipole-dipole interaction, and hydrogen bonding of the molecule make maleic acid polar, which makes it soluble in water. Because water is also polar, it can dissolve quickly in it. Fumaric acid is a non-polar molecule, but is not very soluble in water, despite the instantaneous induced dipole that the London Dispersion forces have for the molecule.

After losing the H⁺ ion, malic acid's cis isomer can create intramolecular H bonds, which makes the conjugate base more stable than the trans form (Fumaric acid).

Maleic acid has a higher tendency to lose H⁺ than fumaric acid because intramolecular H-bonding stabilizes the conjugate base by H-bonding, as shown in the first and second figures of the image given below:

Because maleic acid contains intramolecular H-bonding, fumaric acid has a lower pKa₂ than maleic acid when the second H is taken out.

As the acidity rises, the value falls because pKa is the negative logarithm of Ka. Maleic acid has a higher initial dissociation constant than fumaric acid as a result of stable conjugate base synthesis, which increases the former's acidity. Due to the structures of the singly dissociated ions, fumaric acid undergoes the second dissociation more quickly. Fumaric acid is a simple two distinct carboxylate group that dissociates relatively separately.

Maleic acid, on the other hand, only undergoes one dissociation to form a more robust resonant ring structure. The remaining hydrogen can now alternately bond to the oxygen in positions 2 and 3 to form an alternating 3 Center bond because it is a 1,4 dicarbonyl with an alkene between those two positions. The alternating 3 Center bond creates a seven-part aromatic ring because an alkene is located next to it. The conjugate base of maleic acid is stabilized and has fewer acidity thanks to aromatic rings. Look at the image below, specifically the third number figure.

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Among the given weak bases, aniline is the weakest electrolyte in an aqueous solution.What is an electrolyte?An electrolyte is a substance that conducts electricity in an aqueous solution or in a molten state.

In water, they break up into ions and conduct electricity. Electrolytes may be categorized into two types: strong and weak electrolytes. Strong electrolytes dissociate completely into ions in aqueous solution, whereas weak electrolytes only partially dissociate into ions and exist in equilibrium with undissociated molecules. In the given weak bases, aniline is the weakest electrolyte.

Here's how to solve the problem: Aniline has a Kp of 4.0 × 10-10, which is the smallest value of Kp among all the given weak bases. Therefore, aniline is the weakest electrolyte in an aqueous solution.

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Answer:

host

Explanation:

the virus exploits your cells

Answer:

parasite is worse than throwing up

Explanation:

throwing up tells you that you can't have an infection in every way possoble

Answer:

Mass and Distance

Explanation:

Because I know.

Answer:

"Gravity is a force of attraction between two objects that depends on two things: mass and distance. Mass: The greater the mass of two objects, the greater the gravitational force between the objects."

Explanation:

During a perigee moon, the tides at sites x and y would be higher. This occurs when the moon is at its closest point to Earth during a perigee moon, increasing its gravitational attraction. Perigee tides, which are higher tides as a result, result.

The moon is further from Earth during an apogee moon, which causes a weaker gravitational pull and lower tides, or apogee tides.

The moon and sun's gravitational pull on Earth's oceans is what causes tides. The moon has a higher gravitational pull on Earth than the sun because of its proximity to the planet. The moon orbits Earth in an oval shape, which causes variations in the distance between the moon and Earth.

The moon is at its closest to Earth during a perigee moon, increasing the strength of the moon's gravitational pull. Higher tides come from the oceans' increased bulge as a result of this. On the other side, the moon's gravitational pull is weaker during an apogee moon since it is farther away from Earth. As a result, the tides are lower and the oceans don't bulge as much.

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Rounded to the nearest whole number, y is 42. Therefore, the molecular formula of the hydrocarbon is C4H42.

To find the molecular formula of the hydrocarbon, we first need to determine the molecular weight. We know that the mass ratio between hydrogen and carbon is 1:10, which means that for every 1 gram of hydrogen, there are 10 grams of carbon in the molecule.

Let's assume that we have x number of carbon atoms and y number of hydrogen atoms in the molecule. The molecular weight can then be expressed as:

Molecular weight = (x x atomic weight of carbon) + (y x atomic weight of hydrogen)

Since the mass ratio between hydrogen and carbon is 1:10, we can write:

y = 10x

Now, we can substitute y in the equation for molecular weight:

Molecular weight = (x x atomic weight of carbon) + (10x x atomic weight of hydrogen)

Molecular weight = x(atomic weight of carbon + 10 x atomic weight of hydrogen)

We also know that one liter of hydrogen at 127°C and 1 atm pressure weighs 2.8 g. Using the ideal gas law, we can calculate the number of moles of hydrogen in one liter:

PV = nRT

n = PV/RT

n = (1 atm x 1 L) / (0.0821 L.atm/mol.K x 400 K)

n = 0.0305 mol

The molecular weight of the hydrocarbon can be calculated as follows:

Molecular weight = 2.8 g / 0.0305 mol

Molecular weight = 91.80 g/mol

Now, we can solve for x in the equation for molecular weight:

91.80 g/mol = x(12.01 g/mol + 10 x 1.01 g/mol)

91.80 g/mol = 12.01x + 10.10x

91.80 g/mol = 22.11x

x = 4.15

Since x represents the number of carbon atoms in the molecule, we can round it to the nearest whole number, which is 4. Similarly, y can be calculated as:

y = 10x = 41.5

Rounded to the nearest whole number, y is 42. Therefore, the molecular formula of the hydrocarbon is C4H42.

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Steam is a gas. ... The difference between a liquid and the other states of matter is that liquid molicules are more spread apart than solid molicules but less spread apart than gas molicues. Water is the base for both ice and steam.on:

The main difference between  ice, liquid water, and steam is that ice is a solid, liquid water is a liquid, and steam is a gas.

The first difference between ice, liquid water, and steam is that ice is solid, liquid water is liquid, and steam is gas.

The second difference between ice, liquid water, and steam is that ice is solid so the molecule of solid are closely packed and intermolecular space is negligible, liquid water is a liquid so the molecule are little far with each other and intermolecular space between molecules are more as compare to solid, and steam is gas so the molecule s are scattered freely and intermolecular space is very high as compare to solid and liquid.

The third difference between ice, liquid water, and steam is that 32°F is the freezing point of water, when temperature arises from 32°F water starts melting and converted from solid to liquid.

Therefore, the main difference between  ice, liquid water, and steam is that ice is a solid, liquid water is a liquid, and steam is a gas.

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Answer:

biological

Explanation:

An atom has single valence electron in an excited p state. The excitation of this electron left a hole in a lower d state. The possible values for the total angular momentum (I) of this atom are 1 and 2.

To determine the possible values for the total angular momentum (I) of an atom with a single valence electron in an excited p state and a hole in a lower d state, we need to consider the quantum numbers associated with angular momentum.

In this case, the total angular momentum (I) is determined by the addition of the individual angular momenta of the valence electron and the hole. The angular momentum of an electron is given by the quantum number l, which can take integer values from 0 to (n-1), where n is the principal quantum number. The total angular momentum (I) is given by the sum of the angular momenta of the electron (l) and the hole (l-1).

Therefore, the possible values for the total angular momentum (I) can be calculated by adding the range of possible values for l and (l-1) in the excited p and lower d states, respectively.

For the excited p state, the possible values of l are 1.

For the lower d state, the possible values of l are 2.

Now, we can find the possible values for the total angular momentum (I) by adding the values of l and (l-1):

When l = 1 (p state) and (l-1) = 0 (d state):  I = 1 + 0 = 1

When l = 1 (p state) and (l-1) = 1 (d state):  I = 1 + 1 = 2

Therefore, the possible values for the total angular momentum (I) of this atom are 1 and 2.

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Answer:

amount of gas and pressure

The answer of the mathematical operation to the correct number of significant figures is 1.71x10⁻⁴

The answer of the mathematical operation to the correct number of significant figures is 7.2

The no of significant figures in the answer depends on the no of significant figures in the problem given.

It is given 1.05x10⁻³/6.135 , so the number of significant figures in 1.05x10⁻³ is 3 and in 6.135 is 4. So the answer of this operation will be rounded off to have 3 significant figures only. Since the calculated amount comes out as 0.17114x10⁻³. But it has to be rounded to 4 significant figures. So the answer will be 1.71x10⁻⁴

It is given 21-13.8 , so the number of significant figures in the operation are 2 and 3 respectively. So the calculated amount comes to be 7.2 and it already has 2 significant figures.

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