35.0 ml. of a 0.250 M solution of /OH is titrated with 0.150 M HCI. After 35.0 mL of the HCl has been added, the resultant

The molar mass of the hemoglobin is 16138 g

We know that the percentage by mass of an element in a compound is the ratio of the mass of the element to the molar mass of the compound multiplied by 100.

Now we have the percent by mass of iron in the compound to be 0.347%. We can now write;

0.347 = 56/MM * 100

Where MM refers to the molar mas of the hemoglobin

0.347 = 5600/MM

MM = 5600/ 0.347

MM = 16138 g

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Answer:

The stigma.

Explanation:

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Draw cyclohexanol with a double bond and without the OH- group. next draw water

Two atoms sharing two sets or electrons result in a double bond. Always shared in pairs, electrons. Covalent bonds are referred to as each shared electron pair. A double bond between two atoms requires more energy to break than a single bond because four electrons are divided between the two atoms in a dual bond.

When two atoms join one couple of electrons, they form a single bond; when they share two pairs, they form a double bond (four electrons). To form triple bonds, three pairs free electrons (six atoms) share space.

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Answer:

90%

Explanation:

it will be 81/90 ×100/1

81 over 90 × 100 over 1

1. The IUPAC name of N is nitrogen.

2. Nitrogen dioxide

3.The IUPAC name of O is oxygen

4.The IUPAC name of OH is hydroxyl.

The IUPAC name of ·0 is a radical. It is commonly found in organic chemistry and plays an important role in many reactions.

IUPAC names for the given compounds are:1.1. N: Nitrogen

The IUPAC name of N is nitrogen.

It is a non-metal and belongs to group 15 in the periodic table. It has an electronic configuration of 1s2 2s2 2p3.1.2. NO2: Nitrogen dioxide

Explanation: NO2 is a chemical compound that is formed by the combination of nitrogen and oxygen. It is a reddish-brown gas that has a pungent odor.

The IUPAC name of NO2 is nitrogen dioxide.1.3. O: Oxygen

Explanation: The IUPAC name of O is oxygen.

It is a non-metal and belongs to group 16 in the periodic table. It has an electronic configuration of 1s2 2s2 2p4.

X: UnknownExplanation: No IUPAC name can be given to an unknown compound as the structure and composition are not known.

Y: Hydroxyl Explanation: The IUPAC name of OH is hydroxyl.

It is a functional group that is composed of an oxygen atom and a hydrogen atom (-OH). It is commonly found in alcohols and phenols. ·0: RadicalExplanation: A radical is a molecule or an ion that contains an unpaired electron.

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Note: The complete question is given below

Provide the IUPAC names for the following compounds:

\(CH_3CH_2CH(CH_3)CH_2CH_2CH_2CH_3\)

C6H5CH(CH3)2

H2NCH2CH2CH2CH2CH2NH2

CH3CH2CH2CH2CH2OH

CH3CH2CH2CHOHCH3

Explanation:

Medicinal chemistry and pharmaceutical chemistry are disciplines at the intersection ofchemistry, especially synthetic organicchemistry, and pharmacology and various other biological specialties, where they are involved with design,chemical synthesis and development for market of pharmaceutical agents, or bio-active ...

Answer:  There are three main types of forests: tropical rainforests, deciduous forests, and coniferous forests. Tropical rainforests are found near the equator (the center of Earth), where they are warm all year round.

Explanation:

Ecosystems are defined as a geographical region where biotic factors like animals, plants and microorganisms live together and interact with the abiotic factors.

The three forest ecosystems are temperate, boreal and tropical.

Tropical forest ecosystems have high precipitation and temperature also a high humidity rate. The plant has a twelve-month growing period and the forests are found near the equator regions.

Temperate is found in between the boreal and the tropical forests, it has a high level of rainfall and humid conditions and is covered with the deciduous type of trees.

Boreal or the taiga forest ecosystems are located in the subarctic regions with low temperatures and have long winters. They are covered majorly by the scale-leaved evergreen and the needle leaves cones.

All three forest ecosystems have great species diversity, the tropical and the temperate forest have dense vegetation and the temperate and boreal have evergreen forests.

Therefore, three forest ecosystems are temperate, boreal and tropical.

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Answer:

physical properties include melting point, boiling point, strength, and malleability.

Explanation:

Answer:

Metal properties.

Explanation:

metal has its fix point to melt and boil expect mercury because it doesn't have its own fix point of melting or boiling, strength- if metal is heated then it can be strength and we can give it shape by heating

The factor that can reduce the required number of kWh for heating is the lower use of the electrical equipment that is option C.

The electrical power is defined as the amount of energy that a device is capable of transfering per unit time.

The electrical power is usually measured in kilowatts per hour. That is KWh.

To determine the total amount of power consumed by an electrical device is to multiple the power use (in kilowatts, kW) by the number of hours during which the power is consumed.

But when there is reduction in the use of the electrical device, the amount of power consumed reduces.

Therefore, to reduce the amount of required number of power consumed (kWh) for heating, the number of times the electrical device is being used should be reduced.

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Psychology is useful in explaining current behavior and predicting future behavior.

Psychology is an empirical investigation of the intellect and conduct, encompassing a vast scope of subjects such as cognitive processes, affective states, volition, individual traits, and interpersonal dynamics.

Psychologists employ a diverse array of approaches to examine behavior, including careful observation, in-depth interviews, comprehensive surveys, and controlled experiments.

By discerning the underlying determinants, psychology serves as a tool to elucidate present conduct. These determinants may involve biological, psychological, and sociocultural influences.

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Answer:

1. 0.28M

2. 24mL

3. 0.002295moles of NaOH.

Explanation:

1. The 6.0M HCl solution is diluted from 35mL to 750mL, that is:

750mL / 35mL = 21.43 times

The 6.0M HCl solution is diluted 21.43 times, the final concentration is:

6.0M / 21.43 = 0.28M

2. First, we need to convert grams of CuNO3 to moles and then, as molarity is moles per liter we can solve for volume of solution in liters and convert it to mililiters:

Moles CuNO3 -Molar mass 124.9g/mol:

2.49g * (1mol / 124.9g) = 0.020 moles of CuNO3

Volume is:

0.020 moles * (1L / 0.830mol) = 0.0240L * (1000mL / 1L) = 24mL

3. In 13.5mL = 0.0135L of 0.17M NaOH the moles are:

0.0135L * (0.17mol / L) = 0.002295moles of NaOH

Explanation:

It is known that the chemical formula of aluminum sulfite is given by:

The sulfite ion = SO3-2, so it has 3 x 1 SO3-2 = 3 sulfite ions

Answer: 3

The non-metal elements in Group 7 – known as the halogens – get less reactive as you go down the group

Answer & Explanation:

The reactivity of elements in Group VII, also known as Group 17, decreases with increasing atomic radius. This is because halogens have high electronegativities and a proclivity to gain electrons in noble gas configurations. Myths are traditional stories or beliefs that explain cultural or societal beliefs, customs, or natural phenomena. They can be passed down through generations and can be based on true or fictitious events. Mythology, on the other hand, is the collection of myths associated with a specific culture or religion. Mythology can be amplified through retelling, incorporation into religious practices; association with significant events or figures, and adaptation into other media forms such as literature, film, or art.

Answer:

Explanation:

We can see that this picture can be used to show Ohm's Law graphically so it illustrates Ohm's  Law.

According to Ohm's Law electric current is directly proportional to voltage and inversely proportional to resistance.

Mathematically, V ∝ I,

or                       V=IR,

where,       V  ⇒ voltage difference between two points,

                 I  ⇒ current flowing through the resistance,

                 R ⇒ proportionality constant or resistance.

According to the picture voltage ( SI unit Volt ) is supporting the current  ( SI unit Ampier ) to move out from the barrier while the resistor ( SI unit Ohm )is acting as a barrier to its way . As it is satisfying the Ohm's Law it illustrates the relationship between voltage, current, and resistance.

Answer:

We need more? What else is in the question? This is unanswerable.

Explanation:

Answer:

Preventing erosion – Land Reclamation

Protecting nesting areas – Protecting Biodiversity

Preventing littering – Land Reclamation

Preventing habitat disruption – Protecting Biodiversity

Protecting native species – Protecting Biodiversity

Preventing contamination of soil – Land Reclamation

Explanation:

I really hope I'm right! I tried my hardest, please give me brainliest :)

have a good day!

The calculated formula masses to 133.5 amu, we find that the substance with a formula mass closest to 133.5 amu is (d) AlCl3. Therefore, the answer is option D.

To identify the substance with a formula mass of 133.5 amu, we need to calculate the formula mass of each given substance and compare it to 133.5 amu.

(a) MgCl2:

The formula mass of MgCl2 can be calculated by adding the atomic masses of magnesium (Mg) and chlorine (Cl).

Mg: atomic mass = 24.31 amu

Cl: atomic mass = 35.45 amu

Formula mass of MgCl2 = (24.31 amu) + 2(35.45 amu) = 95.21 amu

(b) SCl:

The formula mass of SCl can be calculated by adding the atomic masses of sulfur (S) and chlorine (Cl).

S: atomic mass = 32.07 amu

Cl: atomic mass = 35.45 amu

Formula mass of SCl = 32.07 amu + 35.45 amu = 67.52 amu

(c) BCl:

The formula mass of BCl can be calculated by adding the atomic mass of boron (B) and chlorine (Cl).

B: atomic mass = 10.81 amu

Cl: atomic mass = 35.45 amu

Formula mass of BCl = 10.81 amu + 35.45 amu = 46.26 amu

(d) AlCl3:

The formula mass of AlCl3 can be calculated by adding the atomic mass of aluminum (Al) and 3 times the atomic mass of chlorine (Cl).

Al: atomic mass = 26.98 amu

Cl: atomic mass = 35.45 amu

Formula mass of AlCl3 = 26.98 amu + 3(35.45 amu) = 133.78 amu. Option D

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Answer: Electrons are taken up by \(PbO_2\) and they are lost by \(HCl\)

Explanation:

Redox reaction is defined as the reaction in which oxidation and reduction take place simultaneously. It is also called the reaction where the exchange of electrons takes place.

An oxidation reaction is defined as the reaction in which a chemical species loses electrons takes place. In this reaction, the oxidation state of a substance gets increased.

A reduction reaction is defined as the reaction in which a chemical species gains electrons takes place. In this reaction, the oxidation state of a substance gets reduced.

For the given chemical reaction:

\(PbO_2+4HCl\rightarrow PbCl_2+Cl_2+2H_2O\)

The half-reactions for this redox rection follows:

Oxidation half-reaction:  \(2HCl\rightarrow ClO_2 + 2e^-\)

Reduction half-reaction:  \(PbO_2+2e^-\rightarrow PbCl_2\)

Hence, electrons are taken up by \(PbO_2\) and they are lost by \(HCl\)

Answer:

it had wings that flapped similat to birds wings

The pOH of the 0.001 M NaOH solution is approximately 3.

To determine the pOH of a solution, we need to know the concentration of hydroxide ions (OH-) in the solution.

In the case of a 0.001 M NaOH solution, we can assume that all of the NaOH dissociates completely in water to form Na+ and OH- ions. Therefore, the concentration of hydroxide ions in the solution is also 0.001 M.

The pOH is calculated using the equation:

pOH = -log[OH-]

Substituting the concentration of hydroxide ions, we have:

pOH = -log(0.001)

Using a calculator, we can evaluate the logarithm:

pOH ≈ 3

Therefore, the pOH of the 0.001 M NaOH solution is approximately 3.

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Answer:

Explanation:

The volume of a substance when given the density and mass can be found by using the formula

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

From the question we have

\(volume = \frac{244}{2.7} \\ = 90.370370...\)

We have the final answer as

Hope this helps you

The alkene that can be converted into trans-1-ethyl-2-propylcyclopropane via a Simmons-Smith reaction is 1-pentene.

A Simmons-Smith reaction involves the use of a reagent called diiodomethane (CH2I2) and a metal such as zinc to form a carbene intermediate that can react with alkenes to form cyclopropanes. In this case, 1-pentene can react with diiodomethane and zinc to form trans-1-ethyl-2-propylcyclopropane.

The reaction proceeds via a cyclic intermediate, where the carbene adds across the double bond of 1-pentene to form a cyclopropane ring. The resulting product has a trans configuration due to the stereochemistry of the reaction.

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Answer: A typical hydrogen fuel cell produces 0.5 V to 0.8 V per cell. To increase the voltage individual cells can be connected in series.

There is no reason to run these solutes at the 20 MWCO because they are both much smaller than the MWCO of the membrane.

The MWCO (molecular weight cut off) is the molecular weight of a solute at which it will be retained by a membrane during a process such as ultrafiltration or dialysis. If a solute has a molecular weight higher than the MWCO of a membrane, it will be retained and not pass through the membrane. If the molecular weight of a solute is lower than the MWCO, it will pass through the membrane.

In this case, glucose has a molecular weight of 180 g/mol (6 carbons x 12 g/mol per carbon + 6 oxygens x 16 g/mol per oxygen) and albumin has a molecular weight of approximately 81,942 g/mol (607 amino acids x 135 g/mol per amino acid). Both of these solutes have molecular weights that are much lower than 20,000 g/mol, which is a typical MWCO for ultrafiltration or dialysis membranes.

They would both easily pass through the membrane and be lost during the process. Instead, a membrane with a much lower MWCO would be needed if we wanted to retain these solutes during a process such as ultrafiltration or dialysis.

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The compound that has a functional group containing two oxygen atoms is peroxide. In addition to peroxides, there are other compounds that contain functional groups with two oxygen atoms. These include carboxylic acids and esters.

Peroxide compounds, such as hydrogen peroxide (H₂O₂) or organic peroxides, have a functional group (-O-O-) where two oxygen atoms are bonded together. This group is responsible for the characteristic properties and reactivity of peroxides.

Carboxylic acids: Carboxylic acids have the functional group -COOH, which consists of a carbonyl group (C=O) and a hydroxyl group (-OH) bonded to the same carbon atom. While carboxylic acids have one oxygen atom from the carbonyl group, the hydroxyl group provides the second oxygen atom.

Esters: Esters have the functional group -COO-, which consists of a carbonyl group (C=O) and an oxygen atom (-O-) bonded to the same carbon atom. This arrangement gives esters two oxygen atoms within their functional group.

Hence, the compounds with functional groups containing two oxygen atoms include peroxides, carboxylic acids, and esters.

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The precipitate formed when a solution of manganese(II) nitrate and

potassium sulfide react is Manganese sulfide (MnS)

To obtain the precipitate formed when a solution of manganese(II) nitrate and potassium sulfide react, we shall write the balanced ionic equation. This is illustrated below:

Manganese (II) nitrate => Mn(NO₃)₂

Potassium sulfide => K₂S

In solution, they will react as follow:

Mn(NO₃)₂ (aq) —> Mn²⁺(aq) + 2NO₃¯(aq)

K₂S(aq) —> 2K⁺(aq) + S²¯(aq)

Mn(NO₃)₂ (aq)  + K₂S(aq) —>  

Mn²⁺(aq) + 2NO₃¯(aq) + 2K⁺(aq) + S²¯(aq) —> MnS(s) + 2K⁺(aq) + 2NO₃¯(aq)

Cancel out the spectator ions (i.e K⁺ and NO₃¯)

Mn²⁺(aq) + S²¯(aq) —> MnS(s)

From the net ionic equation above, we can see that MnS is insoluble.

Therefore, the precipitate formed when a solution of manganese(II) nitrate and potassium sulfide react is Manganese sulfide (MnS)

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Approximately 631.5 liters of dry air at 25°C and 750 torr would need to be processed to produce 150 liters of liquid \(O_2\) -183°C.

To solve this problem, we need to consider the ideal gas law and the molar volume of gases.

First, we can calculate the number of moles of oxygen in 150 L of liquid \(O_2\) at -183°C. To do this, we divide the mass of liquid oxygen by its molar mass:

Mass of liquid oxygen = volume of liquid oxygen * density of liquid oxygen = 150 L * 1.14 g/mL = 171 g

Molar mass of oxygen (O2) = 32 g/mol

Number of moles of oxygen = mass of oxygen / molar mass of oxygen = 171 g / 32 g/mol ≈ 5.34 mol

Since the mole fraction of oxygen in dry air is given as 0.21, we can calculate the total moles of dry air needed to produce 5.34 mol of oxygen:

Moles of dry air = moles of oxygen / mole fraction of oxygen = 5.34 mol / 0.21 ≈ 25.43 mol

Now, we can use the ideal gas law to calculate the volume of dry air at 25°C and 750 torr (convert to atm) that corresponds to 25.43 mol:

PV = nRT

P = 750 torr * (1 atm / 760 torr) ≈ 0.987 atm

V = volume of dry air (unknown)

n = 25.43 mol

R = 0.0821 L·atm/(mol·K)

T = 25°C + 273.15 = 298.15 K

Solving for V:

V = nRT / P = (25.43 mol)(0.0821 L·atm/(mol·K))(298.15 K) / 0.987 atm ≈ 631.5 L

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a. The rate law for this reaction is: Rate = k[Cl] [H₂]. This means that the rate of the reaction is directly proportional to the concentrations of both Cl and H₂ molecules.

Rate law is an equation that describes the rate of a chemical reaction as a function of the concentrations of reactants. The rate law allows us to describe how the rate of a reaction changes when the concentrations of reactants are changed. It is derived from the rate equation, which is a mathematical expression that can be used to calculate the rate of a reaction from the concentrations of the reactants and the rate constant.

b. The rate law for this reaction is: Rate = k[O] [Os]. This means that the rate of the reaction is directly proportional to the concentrations of both O and Os molecules.
c. The rate law for this reaction is: Rate = k[NO₂]₂. This means that the rate of the reaction is directly proportional to the square of the concentration of NO₂ molecules.

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Complete Question:

Antioxidants are the substance that prevent oxidation process in a cell, oxidation produce free radical, and free radicals harm the cell. The oxidation number is the count of electrons present in an atom.

Ascorbic acid (vitamin C) is  a water-soluble vitamin that is present in the citrus fruits and vegetables.

Ascorbic acid act as an antioxidant and prevent the production of free radicals in a cell.

Thus, Antioxidants are the substance that prevent oxidation process in a cell, oxidation produce free radical, and free radicals harm the cell. The oxidation number is the count of electrons present in an atom.

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Hello, this is Bing. I can help you with your question. Based on the information I found on the web, **H2** can be broken down into its two atoms of hydrogen (H) by supplying enough energy to overcome the bond that holds them together⁴. This process is called **dissociation** and requires an energy equal to or greater than the **dissociation energy** of H2, which is about 436 kJ/mol⁴.

One way to break down H2 is by using **electricity** to split water (H2O) into hydrogen (H2) and oxygen (O2) through a process called **electrolysis**¹. In this process, water is decomposed into its elements by passing an electric current through it. The electric current is provided by a battery or another source of electricity and the water needs to have an **electrolyte**, such as salt or acid, added to it to make it conductive¹. Two electrodes, usually made of metal or other conductive material, are inserted into the water and connected to the battery. The electrode connected to the positive terminal of the battery is called the **anode** and the one connected to the negative terminal is called the **cathode**¹. When the electric current flows through the water, hydrogen gas bubbles form at the cathode and oxygen gas bubbles form at the anode¹. The overall chemical reaction for electrolysis of water is:

2 H2O → 2 H2 + O2

Another way to break down H2 is by using **heat** to cause a reaction between hydrogen and oxygen that produces water and releases a large amount of energy. This reaction is called **combustion** or **oxidation** and can be ignited by a spark or a flame³. The reaction is very fast and explosive and can be dangerous if not controlled. The overall chemical reaction for combustion of hydrogen is:

2 H2 + O2 → 2 H2O

I hope this helps you understand how H2 can be broken down and what methods are used to do so.