Which image best depics the nitrogen after it has boiled?.

Answer:

3ml

Explanation:

10ml-7ml=3ml

Answer:

3 electrons

Explanation:

Nitrate needs 3 electrons to achieve a stable electron configuration

Three is the answer. it needs three to complete its shell

At equivalence there is no more HA and no more NaOH, for this particular reaction. So that means we have a beaker of NaA and H2O. The H2O contributes 1 x 10-7 M hydrogen ion and hydroxide ion. But NaA is completely soluble because group 1 ion compounds are always soluble. So NaA breaks apart in water and it just so happens to be in water. So now NaA is broken up. The Na+ doesn't change the pH but the A- does change the pH. Remember that the A anion is from a weak acid. That means it will easily attract a hydrogen ion if one is available. What do you know? The A anion is in a beaker of H+ ions! So the A- will attract H+ and become HA. When this happens, it leaves OH-, creating a basic solution, as shown below.

The disaccharide are composed of the glucose and the fructose is the sucrose.

The disaccharide composed of the glucose and the fructose is sucrose. The sucrose is commonly called as the table sugar. The glucose and the fructose both are the monosaccharides and if they combined together , they form the disaccharide sugar.

The sucrose is produced as naturally in the plants and is then extracted and will processed to form the sugar and this is used in the cooking as the sweetener. The sucrose is the one of the most abundant and it consists of the  molecule of the  α-glucose and the β-fructose linked together.

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A primary explosive is a sensitive explosive that almost always explodes with a single ignition from a primary heat source of sufficient intensity, such as a spark, flame, impact, or other primary heat source.

Primary explosives can explode as a result of a spark or a relatively weak mechanical stress. They start the primary explosive when used as blasting caps (detonators). Additionally, they are loaded with friction-mixed materials and other ingredients in percussion caps.

A highly brisant starting explosive with a high triggering velocity is required. Mercury fulminate, lead azide, lead trinitroresorcinate, silver azide, diazodinitrophenol, and tetrazene, which is a primer additive, are the most significant primary explosives.

Only if they have already been pressed into capsules must initiation charges be transported.

Therefore, A primary explosive is a sensitive explosive that almost always explodes with a single ignition from a primary heat source of sufficient intensity, such as a spark, flame, impact, or other primary heat source.

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Answer:

Required number is the vertical coordinate of the intersection point of a line at 60°C with the graph of the KNO₃.

Answer:

K potassium have least ionization energy among these four

Explanation:

Ionization energy values are given in kilo joule per mole

Ca 590

Ge 762

K 419

Ga 579

From above data we can understand stand K has least and Ge has highest ionization energy

Answer:

Explanation:

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In this question, we have to choose two neutral atoms that will present the same number of valence shell electrons, in order to do that, we can look for these elements in the periodic table, the elements that are in the same group will have the same number of electrons in the valence shell, this is the case of Sulfur and Selenium, both are in group 6 and present 6 electrons in the valence shell

Given metallic chloride formula =MCl3

It belongs to Nitrogen(N) family.

But the condition is that its transition element.

EC given by

\(\\ \sf\longmapsto 1s^22s^22p^63s^23p^64s^23d^3\)

\(\\ \sf\longmapsto [Ar]3d^3\)

The symmetries of each mode

a. NH3 - Number of IR-active modes: 3; Number of Raman-active modes: 3; Symmetries: A1 + E.

IR-active is a term used to describe a substance or material which is capable of absorbing infrared radiation. This term is most commonly used to refer to molecules which contain certain types of bonds, such as those between carbon-hydrogen, carbon-carbon, and carbon-oxygen. These molecules are able to absorb infrared radiation because the bonds vibrate at frequencies that correspond to the infrared part of the electromagnetic spectrum. This absorption of infrared radiation causes the molecules to heat up, thus making them IR-active.

b. H2O - Number of IR-active modes: 4; Number of Raman-active modes: 2; Symmetries: A1 + B2 + E.

c. [PtCl4]^2- - Number of IR-active modes: 10; Number of Raman-active modes: 4; Symmetries: A1 + A2 + E.

d. [PtCl6]^2- - Number of IR-active modes: 12; Number of Raman-active modes: 6; Symmetries: A1 + A2 + B1 + E.

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Answer:

0.1mole

Explanation:

Given parameters:

Pressure = 0.0884atm

Temperature  = 6°C  = 6 + 273  = 279K

Volume occupied  = 26.5L

Unknown:

Number of moles  = ?

Solution:

To solve this problem, we are going to use the ideal gas equation:

           PV  = nRT

P is the pressure

V is the volume

n is the number of moles

R is the gas constant  = 0.082atmLmol⁻¹k⁻¹

T is the temperature.

  Insert the parameters and solve for n;

     0.084 x 26.5  = n x 0.082 x 279

              n  = 0.1mole

Answer:

Francium is a chemical element with the symbol Fr and atomic number 87. Prior to its discovery, it was referred to as eka-caesium. It is extremely radioactive; its most stable isotope, francium-223, has a half-life of only 22 minutes.

Answer:

They all are made up of cells

Answer: They are all made of cells.

Explanation:

The Solubility of a substance is defined as the maximum amount that dissolves in a given amount of solvent at a specified temperature.

Solubility is the most awareness of a solute that can dissolve in a solvent at a given temperature. at the maximum concentration of solute, the solution is said to be saturated.

The most amount of a substance that can be dissolved in a given volume of solvent is referred to as solubility. frequently, the solubility in water is expressed in gram/a hundred mL. an answer that has now not reached its most solubility is called an unsaturated solution.

Solubility is described because the maximum amount of a substance that it will dissolve in a given amount of solvent at a distinct temperature. Solubility is a characteristic property of a particular solute-solvent aggregate, and unique materials have significantly differing solubilities.

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Answer: Mg is a cation and Cl is an anion

Explanation: In more detail, if you look at the periodic table, the group number (or columns) of the elements, describe how many valence electrons, or how many electrons the element has available to have a complete an electron shell. Magnesium being in group 2, it has one 2 electrons that will be "donated" to an anion that it bonds with. However, Chlorine being in group 17, (look at the single digit number for double digit groups), it has 7 valence electrons. Knowing that a full electron shell is usually 8 electrons, it needs only one. Since Magnesium has 2 valence electrons to give away, two atoms of Chlorine gas will then bind to the Magnesium, where the 2 Chlorine atoms will take the electrons to fill their shells. Magnesium Chloride, in terms of charges when in ions, [Mg]2+ and 2 [Cl]-1

Magnesium chloride is formed when magnesium ion formed from the loss of two electrons and two chloride ions formed by accepting one electron each are held together by electrostatic attractive forces.

Magnesium chloride is an ionic compound which consists of magnesium ions and chloride ions.

Therefore, magnesium chloride is formed when magnesium ion formed from the loss of two electrons and two chloride ions formed by accepting one electron each are held together by electrostatic attractive forces.

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The group 12 elements have different properties than group 13 elements because both have different number of valence electron.

The electron present in valence shell is called valence electron.

The electronic configuration group 12 and group 13 is given below.

Electronic configuration Group 12 = (n-1)d10 ns2

Electronic configuration Group 13 = ns2np1

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Water has a much higher specific heat, than air, because it takes more energy to heat water than it does to heat air.

This is a term which is referred to as the quantity of heat which is required to raise the temperature of one gram of a substance by one Celsius degree.

Water has a higher specific heat because it requires more energy to heat water than it does to heat air and an example is result of the specific heat  of the two variables from various studies by scientists in various parts of the world.

Water has a specific heat of 4.186 J/g degrees celsius, versus air, which has a specific heat of 1.005 J/g degrees celsius which is therefore the reason why water was chosen as the correct choice and the one which has a higher specific heat.

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Answer:

red

Explanation:

red shows if solution is acidic

Answer

%Yield = 87.2%

Explanation

Given:

mass of NH3 reacted = 73 g

mass of H2O produced = 101 g

We know:

molar mass of NH3 = 17,031 g/mol

molar mass of water = 18.01528 g/mol

Required: % Yield

Solution:

The formula used to calculate the percentage yield is:

%Yield = (actual yield/theoretical yield) x 100

The actual yield of H2O produced = 101 g

Now lets calculate the theoretical yield first.

First find the number of moles of NH3, and use stoichiometry to find the theoretical mass of water.

n = m/M n is the moles, m is the mass and M is the molar mass.

n = 73/17,031 g/mol

n = 4.29 mol

Using the stoichiometry, there molar ratio between NH3 and H2O is 4:6

Therefore the moles of H2O = 4.29 x (6/4)

n of H2O = 6.43 mol

The theoretical mass can then be calculated:

m = n x M

m = 6.43 mol x 18.01528 g/mol

m = 115.83 g

%Yield = (101 g/115.83)*100

%Yield = 87.2%

The number of moles of the gas present is  0.6245 moles.

STP stands for Standard Temperature and Pressure, which is defined as a temperature of 273.15 K (0°C) and a pressure of 1 atmosphere (atm). At STP, one mole of any ideal gas occupies a volume of 22.4 L.

Using the ideal gas law, we can calculate the number of moles of hydrogen gas present in a sample of 14.1 L at STP:

PV = nRT

where P = pressure, V = volume, n = number of moles, R = gas constant, and T = temperature.

At STP, P = 1 atm and T = 273.15 K. The gas constant R is 0.08206 L atm/mol K.

Substituting the values into the equation, we get:

(1 atm) (14.1 L) = n (0.08206 L atm/mol K) (273.15 K)

Simplifying and solving for n, we get:

n = (1 atm x 14.1 L) / (0.08206 L atm/mol K x 273.15 K)

= 0.6245 mol

Therefore, there are 0.6245 moles of hydrogen gas present in a sample of 14.1 L at STP.

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Answer:

The existence of hydrogen bonding in water explains its_____

a. volatility

b. low boiling point

c. high boiling point

d. both A and C

A. volatility

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Answer:

[He] 2s2 2p2

Explanation:

The mass of nitrogen in 7.43x10^-4 moles of 3TC is 0.036 grams.

To calculate the mass of nitrogen in 7.43x10^-4 moles of 3TC, we first need to determine the number of moles of nitrogen in 1 mole of 3TC. The molar mass of 3TC is 229.26 g·mol^-1, and the molecular formula of 3TC is C8H11N3O3S. The molar mass of nitrogen is 14.01 g·mol^-1, so the molar mass of the nitrogen atoms in 3TC is (14.01 g·mol^-1) x (3 moles of nitrogen per mole of 3TC) = 42.03 g·mol^-1. Therefore, the fraction of the molar mass of 3TC that comes from nitrogen is (42.03 g·mol^-1) / (229.26 g·mol^-1) = 0.1834.Next, we can calculate the mass of nitrogen in 7.43x10^-4 moles of 3TC by multiplying the number of moles of 3TC by the fraction of the molar mass that comes from nitrogen and by the molar mass of nitrogen: (7.43x10^-4 mol) x (0.1834) x (14.01 g·mol^-1) = 0.036 g. Therefore, the mass of nitrogen in 7.43x10^-4 moles of 3TC is 0.036 grams.

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The pH of a solution made up of 25 millilitre of water and 0.375 g of a monoprotic acid with a molar mass of 245 g/mol is 1.21.

The pH of a solution with 0.375 g of a monoprotic acid (molar mass is 245 g/mol) dissolved in water to produce 25 ml of solution can be calculated as follows:

The first step is to calculate the number of moles of the acid in the solution, using the formula:

n = m/M

where n is the number of moles, m is the mass of the acid, and M is the molar mass of the acid.

Substituting the given values:

n = 0.375/245 = 0.00153 moles

The next step is to calculate the molarity of the solution, using the formula:

M = n/V

where M is the molarity of the solution, n is the number of moles of solute, and V is the volume of the solution in liters.Substituting the given values:

M = 0.00153/0.025 = 0.0612 M

Finally, we can use the relationship between pH and the concentration of H+ ions in a solution:

pH = -log [H+]

where pH is the pH of the solution, and [H+] is the concentration of H+ ions in moles per liter.

To find [H+], we can use the fact that the acid is monoprotic, meaning that it donates one H+ ion per molecule of acid when it dissolves in water. Therefore, the concentration of H+ ions in the solution is equal to the concentration of the acid itself, which we calculated to be 0.0612 M.

Substituting this value into the formula for pH:

pH = -log (0.0612) = 1.21 (rounded to two decimal places)

Therefore, the pH of the solution is 1.21.

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Answer:

A

Explanation:

I would say A because the sun makes energy right so if you are looking for an arrow or arrows I would say A I hope this helps!! and have a great day or night

Answer:

A and E

Explanation:

the other guy was correct but E also demonstrate a conservation of mass and energy.

Answer:

Explanation:

The density is measured by: D=mV . Therefore, for the piece of wood in question the density could be calculated by: D=mV=57g125cm3=0.46gcm3 .

Answer:

P₂ = 300 atm

Explanation:

Given that,

Initial volume, V₁ = 600 L

Initial pressure, P₁ = 400 atm

We need to find the pressure if the volume is 800 L.

We know that the relation between pressure and volume is given by :

\(P\propto \dfrac{1}{V}\\\\\dfrac{P_1}{P_2}=\dfrac{V_2}{V_1}\\\\P_2=\dfrac{P_1V_1}{V_2}\\\\P_2=\dfrac{600\times 400}{800}\\\\P_2=300\ atm\)

So, the new pressure is equal to 300 atm.

Answer:

a. Decomposition.

Explanation:

A combination reaction is a reaction where two or more elements or compounds combine to form a single compound. Such reactions may be represented by equations of the following form: X + Y ⇒ XY.

Hence, the answer is a decomposition reaction.

The 4-step synthesis of 1-cyclobutylethan-1-ol from ethyl acetoacetate involves a Claisen condensation, Wolff-Kishner reduction, ring-opening reaction, and a carbocation reduction. By carefully selecting the reagents and following these steps, the desired product can be obtained.

To devise a 4-step synthesis of 1-cyclobutylethan-1-ol from ethyl acetoacetate, we need to plan a series of reactions that will convert ethyl acetoacetate into the desired product. Here is a step-by-step synthesis using the best reagents:

Step 1: Ethyl acetoacetate undergoes a Claisen condensation reaction with an alkoxide base, such as sodium ethoxide (NaOEt), to form the β-keto ester intermediate. In this case, the reagents would be ethyl acetoacetate and sodium ethoxide.

Step 2: The β-keto ester intermediate is then subjected to a Wolff-Kishner reduction. This reaction is typically carried out by treating the intermediate with hydrazine in the presence of a strong base, like potassium hydroxide (KOH). The result is the formation of a cyclobutanol intermediate.

Step 3: To convert the cyclobutanol intermediate into the desired product, we can perform a ring-opening reaction. This can be achieved by treating the cyclobutanol with a strong acid, such as hydrochloric acid (HCl). The acid will protonate the alcohol group, leading to the formation of a carbocation intermediate.

Step 4: Finally, the carbocation intermediate can be reduced to yield the 1-cyclobutylethan-1-ol product. This reduction can be accomplished using a reducing agent like sodium borohydride  in the presence of a solvent such as methanol (MeOH). The reducing agent will donate a hydride ion, resulting in the formation of the desired alcohol.
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