What is the major organic product obtained from the following sequence of reaction? nh2nh2 koh triehtylene glycol

To obtain the desired 80% alcohol solution, you will need to add 60 mL of the 95% alcohol mixture to the 70% alcohol mixture.

To obtain a 80% alcohol solution, you need to determine how much of the 95% alcohol mixture to add to the 70% alcohol mixture.

Let's start by calculating the amount of pure alcohol in the 70% alcohol mixture. Since the mixture is 70% alcohol, we can multiply the volume of the mixture (90 mL) by 0.7 to find the amount of pure alcohol it contains. This gives us 90 mL * 0.7 = 63 mL of pure alcohol.

Next, let's calculate the amount of pure alcohol we need in the final solution. Since we want an 80% alcohol solution, we want 80% of the total volume to be pure alcohol. Let's assume the total volume of the final solution is x mL. Therefore, the amount of pure alcohol we need is 80% of x mL, which is 0.8x mL.

Now, we can set up an equation to solve for x. We have 63 mL of pure alcohol from the 70% mixture, and we need to add a certain amount of the 95% alcohol mixture to obtain the desired 80% solution. So, the equation becomes: 63 mL + amount of pure alcohol from the 95% mixture = 0.8x mL.

To find the amount of pure alcohol from the 95% mixture, we'll assume we need y mL of the 95% mixture. Since the 95% mixture is 95% alcohol, the amount of pure alcohol from the 95% mixture is 0.95y mL.

Substituting these values into the equation, we get: 63 mL + 0.95y mL = 0.8x mL.

To solve for x, we need another equation. Since we have two unknowns, x and y, we'll use the fact that the total volume of the final solution is the sum of the volumes of the two mixtures. Therefore, x mL = 90 mL + y mL.

Now, we can substitute this equation back into the previous equation: 63 mL + 0.95y mL = 0.8(90 mL + y mL).

Simplifying the equation, we get: 63 mL + 0.95y mL = 72 mL + 0.8y mL.

Moving the terms around, we have: 0.15y mL = 9 mL.

Solving for y, we find that y = 60 mL.

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Answer:

0.1 and 0.2.

Explanation:

The person's blood is 0.1 decreases and become more acidic if it has a pH of 7.3 compared to its preferred 7.4 while on the other hand, the person's blood is 0.2 increases and become more alkaline it has a pH of 7.6rather than its preferred 7.4. There is 0.1 decrease and 0.2 increase in the pH of the person's blood. If the pH decreases so it means it moves towards more acidic whereas, if the pH increases there is moves towards alkaline.

Answer:

start moving faster

Explanation:

i would guess because they slow down our freeze when they get cold

Answer:

To obtain crystals of potassium chloride from the solution, you can follow the following steps:

1. Heat the solution to evaporate some of the water and concentrate the solution.

2. Continue heating the solution until crystals start to form at the bottom of the container.

3. Remove the container from heat and allow it to cool down to room temperature.

4. Once the solution has cooled, you can use a filter paper and funnel to filter out the crystals from the remaining solution.

5. Wash the crystals with a small amount of cold distilled water to remove any impurities.

6. Dry the crystals by placing them on a watch glass or filter paper in a warm place until all the water has evaporated.

By following these steps, you should be able to obtain pure crystals of potassium chloride from the solution.

Answer:

When two or more atoms are chemically joined together, this is called a molecule. In some cases, such as hydrogen and oxygen, the molecule is made entirely of the same atom, such as hydrogen gas (a molecule) is made entirely of two hydrogen atoms. Here, converting molecules to atoms is as simple as dividing by two.

Atoms can join together - they form bonds together - to make MOLECULES. For example, two atoms of hydrogen hook together to form a molecule of hydrogen

The mass of sodium chloride, NaCl needed to make a 2.5 M solution with a volume of 500 mL is 73.125 grams

We shall begin our calculation by obtaining the mole of NaCl in the solution. Details below:

Molarity = Mole / Volume

Cross multiply

Mole of NaCl = molarity × volume

Mole of NaCl = 2.5 × 0.5

Mole of NaCL = 1.25 mole

Finally, we shall determine the mass of NaCl needed. Details below:

Mass = Mole × molar mass

Mass of NaCl = 1.25 × 58.5

Mass of NaCl needed = 73.125 grams

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Skeletal structure is missing, so i have attached it.

Answer:

Option B: Omega 6 fatty acid

Explanation:

Arachidonic Acid is defined as an essential and unsaturated fatty acid. It's usually found in animal and human fat including the liver, brain, and also glandular organs. While in animals, it is a constituent of their phosphatides.

Arachidonic Acid is formed as a result of the synthesis from dietary linoleic acid and it's a preliminary stage in the biosynthesis of prostaglandins, thromboxanes, and leukotrienes.

In short, Arachidonic acid is basically a long-chain fatty acid which is a C20, Omega 6 polyunsaturated fatty acid that has four Z-double bonds.

A man have to get their friend bond with someone they like a lot closer. Then, if the man is ready to confess his feeling, try buying his love of his life their favorite flower or favorite candy/food.

hope this help-(even though im a girl ;v;)

The molecular formula of the compound is C6H6, which is benzene.

To determine the molecular formula, we need to first find the empirical formula and then determine the molecular formula based on the molar mass.

Assuming 100 g of the compound, the percentage composition by mass of carbon and hydrogen can be calculated as follows:

Mass of carbon = 92.3 g

Mass of hydrogen = 100 g - 92.3 g = 7.7 g

Next, we can convert the mass of each element to moles using their respective atomic masses:

Moles of carbon = 92.3 g / 12.01 g/mol = 7.69 mol

Moles of hydrogen = 7.7 g / 1.01 g/mol = 7.62 mol

To obtain the simplest whole number ratio of atoms in the compound, we divide the number of moles of each element by the smallest number of moles:

C: 7.69 mol / 7.62 mol ≈ 1

H: 7.62 mol / 7.62 mol = 1

Therefore, the empirical formula of the compound is CH.

To determine the molecular formula, we need to know the molar mass of the compound. The molar mass of the empirical formula CH is:

Molar mass of carbon = 12.01 g/mol

Molar mass of hydrogen = 1.01 g/mol

Molar mass of CH = (1 × 12.01 g/mol) + (1 × 1.01 g/mol) = 13.02 g/mol

To calculate the molecular formula, we divide the experimental molar mass (78.12 g/mol) by the empirical formula mass (13.02 g/mol):

Molecular formula factor = 78.12 g/mol ÷ 13.02 g/mol ≈ 6

The molecular formula is obtained by multiplying the subscripts in the empirical formula by the molecular formula factor:

Molecular formula = (C1H1) × 6 = C6H6

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Answer:

C. is the correct answer

Explanation:

I took the test

In thermodynamics, heat and temperature are closely related concepts with precise definitions. Heat, qstart text, q, end text, is thermal energy transferred from a hotter system to a cooler system that are in contact. Temperature is a measure of the average kinetic energy of the atoms or molecules in the system.

Hope this helps! :)

Answer:

Any unapposed interaction that will change the motion of an object.

Explanation:

My physics teacher had us write this down last week.

The boiling point of methanol when the pressure is 1.27 atm can be calculated using the Clausius-Clapeyron equation. The correct answer is option E) 331.45 K.

The Clausius-Clapeyron equation relates the boiling point of a substance to its vapor pressure at a given temperature. It can be expressed as:

ln(P2/P1) = (-ΔHvap/R) * (1/T2 - 1/T1)

Where:

P1 and P2 are the initial and final pressures, respectively.

T1 and T2 are the initial and final temperatures, respectively.

ΔHvap is the enthalpy of vaporization.

R is the ideal gas constant.

Let's solve for T2:

P1 = 1 atm (normal pressure)

T1 = 337.75 K (normal boiling point)

ΔHvap = 35.2 kJ/mol = 35.2 * 10^3 J/mol

R = 8.314 J/(mol·K)

P2 = 1.27 atm (given pressure)

Substituting the values into the equation and solving for T2:

ln(1.27/1) = (-35.2 * 10^3 J/mol / (8.314 J/(mol·K))) * (1/T2 - 1/337.75)

0.247 = -4231.27 (1/T2 - 1/337.75)

1/T2 - 1/337.75 = -0.000058

1/T2 = 0.000058 + 1/337.75

T2 = 1 / (0.000058 + 1/337.75)

T2 ≈ 331.45 K

Therefore, the boiling point of methanol when the pressure is 1.27 atm is approximately 331.45 K, which corresponds to option E).

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The molar mass (in units of g/mol) of the solute is 175 g.

The molar mass of atoms of an element is given by means of the relative atomic mass of the element accelerated via the molar mass steady, The definition of molar mass is genuinely the variety of grams that one mole of a substance weighs. every other definition of molar mass, is the sum of the atomic weights of the atoms that make up a molecule

One mole of any substance is equal to the Avogadro wide variety. This range as price 6.023 instances 10^{23}. it's miles useful to measure the goods in any chemical reaction. accordingly 6.023 instances 10^{23} of atoms, molecules or debris are 1 mol of atoms, molecules etc.

Solution;

T f = 2.34° C

mass of ascorbic acid = 55g

weight of solvent = 250 g = 0.25 kg

K f = 1.86 °C/m

Molar mass of the ascorbic acid by using formula

        T f = m*K f

molality = \(\frac{mass of ascorbic acid }{molar mass * weight}\)

So, molar mass = 1/0.25 * 55/molar mass *1/0.25 * 1.86  °C/m

Molar mass = 1/0.25 *55/2.34 * 1.86 1.86 °C/m

molar mass = 174.8 = 175 g/mol

Hence answer is  175 g/mol

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Answer:

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

\(n = \frac{N}{L} \\\)

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

\(n = \frac{2.997 \times {10}^{25} }{6.02 \times {10}^{23} } \\ = 49.784053\)

We have the final answer as

Hope this helps you

Answer:

61.75 °C

Explanation:

According to the law of conservation of energy,

Qtin = - (Qliquid)

(m×c×∆T)tin = -(m×c×∆T) ethylene glycol

Where; m = mass

c = specific heat capacity

∆T = change in temperature

According to the information given in this question;

For tin: m= 10.04g, c= 0.213 J/g °C, initial temperature= 14.77 °C, final temperature=?

For ethylene glycol: m= 24.11g, c= 2.36 J/g °C, initial temperature= 63.52 °C, final temperature=?

Hence; (m×c×∆T)tin = -(m×c×∆T) ethylene glycol

10.04 × 0.213 × (T - 14.77) = - {24.11 × 2.36 × (T - 63.52)}

2.139 (T - 14.77) = - {56.899 (T - 63.52)}

2.139T - 31.59 = -56.899T + 3614.225

2.139T + 56.899T = 31.59 + 3614.225

59.038T = 3645.815

T = 3645.815/59.038

T = 61.75 °C

The final temperature of tin and ethylene glycol is 61.75 °C

The most likely amino acid residue to be found in the transmembrane domain of EGFR is Val. The EGFR transmembrane domain consists of a hydrophobic domain that is embedded in the lipid bilayer of the cell membrane. Amino acid residues in the transmembrane domain are primarily hydrophobic amino acids such as leucine, valine,

isoleucine, phenylalanine, tryptophan, and methionine.The transmembrane domain of EGFR is an important region that mediates the signaling activity of EGFR. The transmembrane domain is also critical for EGFR's ability to interact with

other proteins in the cell membrane. Mutations in the transmembrane domain of EGFR have been implicated in cancer, where they can lead to the activation of EGFR signaling in the absence of ligand binding.In conclusion, Val is the most

likely amino acid residue to be found in the transmembrane domain of EGFR. The transmembrane domain consists of hydrophobic amino acid residues that are critical for the function of EGFR. Mutations in the transmembrane domain of EGFR have been associated with cancer.

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Answer:it could be 7

Explanation:

The amount of heat required to heat 2.02 kg of water from 11.67°C to 35.87°C is 2.0220748 × 10³kJ.

To calculate the amount of heat required to heat the water, we can use the specific heat capacity formula:

q = m × c × ΔT

Where:

The specific heat capacity of water is approximately 4.184 J/g°C or 4.184 kJ/kg°C.

Let's perform the calculation:

Mass of water (m) = 2.02 kg

Specific heat capacity of water (c) = 4.184 kJ/kg°C

Change in temperature (ΔT) = (35.87°C - 11.67°C) = 24.2°C

q = (2.02 kg) * (4.184 kJ/kg°C) * (24.2°C)

q = 2022.0748 kJ

Expressing the answer in scientific notation:

q = 2.0220748 × 10³ kJ

Therefore, the amount of heat required to heat 2.02 kg of water from 11.67°C to 35.87°C is 2.0220748 × 10³ kJ.

The complete question should be:

Be sure to answer all parts.

Calculate the amount of heat (in kJ) required to heat 2.02kg of water from 11.67°C to 35.87°C . Enter your answer in scientific notation.

q=____×_____kJ

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Answer:

why would you do that...

Answer:

the answer should be true

hope this helps :)

Explanation:

Answer: The correct option is C) decomposition

Explanation:

Single displacement reaction is defined as the reaction where a more reactive element displaces a less reactive element from its salt solution.

\(AX+B\rightarrow BX+A\)

Element B is more reactive than element A

Double displacement reaction is defined as the reaction where an exchange of ions takes place in a solution

\(AX+BY\rightarrow AY+BX\)

Decomposition reaction is defined as the reaction where a single large chemical species breaks down into two or more smaller chemical species.

\(AB\rightarrow A+B\)

Synthesis reaction is defined as the reaction where two or more smaller chemical species combine together in their elemental state to form a single large chemical species.

\(A+B\rightarrow AB\)

For the given chemical reaction:

\(2H_2O(l)\rightarrow 2H_2(g)+O_2(g)\)

Here, water is breaking down into two smaller species of oxygen and hydrogen gas. Thus, it is a decomposition reaction.

Hence, the correct option is C) decomposition

Answer:

Decomposition

Explanation:

Learning to pan or sifting and sorting for gold is simple. In compared to most other prospecting tools, gold pans are affordable. Generally speaking, gold pans are portable, lightweight items that can be transported almost anywhere.

Within a medium-sized pan, panning employs water to separate heavy gold particles from other lighter ones. In this procedure, water and sediment or ore presumed to contain gold are added to a large, curved pan.

Use your fingers to break up any dirt or clay pieces, taking cautious not to allow any material escape. Place the pan in the shower. Pick up the classifier and comb through it with your fingers for gold nuggets once the rocks on top have been thoroughly cleaned.

By utilizing a sifting and sorting to recover gold from a placer deposit, placer mining, also known as gold panning, is a conventional mining method. Due to its low cost and relative simplicity, the method is one of the easiest ways to extract gold and is well-liked among geology enthusiasts.

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The exact reactants needed to produce the ester in question, please provide the specific ester's chemical formula or name, along with the options available in each set (A, B, and C).

An ester can be formed by the reaction between a carboxylic acid and an alcohol in the presence of an acid catalyst, typically a strong acid such as sulfuric acid (H2SO4) or hydrochloric acid (HCl). The general reaction is as follows:

Carboxylic Acid (RCOOH) + Alcohol (R'OH) → Ester (RCOO-R') + Water (H2O)

In an acid-catalyzed esterification reaction, you need to select one carboxylic acid from set A and one alcohol from set B. The acid catalyst, which belongs to set C, will promote the reaction and facilitate the formation of the ester.

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Answer:

Balanced Chemical Equation

2FeBr3 + 3Ba(OH)2 → 2Fe(OH)3 + 3BaBr2

Explanation:

Reaction Information

Ferric Bromide + Barium Hydroxide = Iron(III) Hydroxide + Barium Bromide

Reaction Type

Double Displacement (Metathesis)

Reactants

Ferric Bromide - FeBr3

FeBr3

Molar Mass of Br3Fe Oxidation State of Br3Fe

Barium Hydroxide - Ba(OH)2

Caustic Baryta Barium Hydroxide Lime Ba(OH)2 Barium Dihydroxide Hydrate

Molar Mass of BaH2O2 Oxidation State of BaH2O2

Products

Iron(III) Hydroxide - Fe(OH)3

Ferric Hydroxide Ferric Oxide Yellow

Molar Mass of FeH3O3 Oxidation State of FeH3O3

Barium Bromide - BaBr2

Molar Mass of BaBr2 Oxidation State of BaBr2

FeBr3 + Ba(OH)2 = Fe(OH)3 + BaBr2

Instructions

To balance a chemical equation, enter an equation of a chemical reaction and press the Balance button. The balanced equation will appear above.

i hope it's help you

Answer:

The electronic configuration of ions formed are:

Li+ (2) => 1s2

Cl- (18) => 1s2 2s2 2p6 3s2 3p6

Explanation:

Lithium metal, Li will lose 1 electron to lithium ion Li+. Chlorine atom, Cl will receive the 1 electron to form the chloride ion Cl- as shown by the following equation below:

Li —> Li+ + e

Cl+ e —> Cl-

Combine both equation

Li + Cl + e —> Li+ + Cl- + e

Cancel out 'e'

Li + Cl —> Li+ Cl-

Thus, we can write the electronic configuration for the reaction as follow:

Before reaction:

Li (3) => 1s2 2s1

Cl (17) => 1s2 2s2 2p6 3s2 3p5

After reaction

Li+ (2) => 1s2

Cl- (18) => 1s2 2s2 2p6 3s2 3p6

Therefore, the electronic configuration of the ions formed are:

Li+ (2) => 1s2

Cl- (18) => 1s2 2s2 2p6 3s2 3p6

Answer:

Explanation:

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

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

From the question

mass = 18.015 g

volume = 15 cm³

We have

\(density = \frac{18.015}{15} \\ = 1.000833333...\)

We have the final answer as

Hope this helps you

Round off .00042557 to three significant digits is = 0.000426

Given

The digit of 00042557

Three significant digits is 0.000426

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Answer:

Mesosphere. This layer extends from around 31 miles (50 km) above the Earth's surface to 53 miles (85 km). The gases, including the oxygen molecules, continue to become denser as one descends. As such, temperatures increase as one descends rising to about 5°F (-15°C) near the bottom of this layer.

Explanation:

I hope this helpful♡♡ plssplss pa brainliest po ako