How to prepare 0.2mol of iodine in 13gram of the solution

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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The amount of oxygen that are produced when 1.06 grams of potassium chlorate decompose completely is 0.64 grams.

Relation between the mass and moles of any substance will be represented as:

Moles of potassium chlorate = 1.66g / 122.5g/mol = 0.0135mole

Given chemical reaction is:

2KClO₃ → 2KCl + 3O₂

From the stoichiometry of the reaction, it is clear that:

2 moles of KClO₃ = produces 3 moles of O₂

0.0135 moles of KClO₃ = produces (3/2)(0.0135)=0.02 moles of O₂

Mass of oxygen = (0.02mol)(32g/mol) = 0.64 g

Hence produced mass of oxygen is 0.64 grams.

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Answer: Joules (J)

Explanation:

Answer:

Joules or Newton metre

Explanation:

Work = Force × distance

Force = kgm/s² (Newton)

×

Distance = m

= kgm²/s² (Newton metre or Joules) (Nm or J)

Answer:

its sodium hydroxide

Explanation:

Answer: 5,266

Explanation:

5,266

The balanced molecular equation for the reaction of magnesium nitrate, Mg(NO₃)₂ and sodium phosphate, Na₃PO₄ is:

3Mg(NO₃)₂(aq) + 2Na₃PO₄(aq) → 6NaNO₃(aq) + Mg₃(PO₄)₂(s)

The balanced molecular equation for the reaction of magnesium nitrate, Mg(NO₃)₂ and sodium phosphate, Na₃PO₄ can be written as illustrated below:

Mg(NO₃)₂(aq) + Na₃PO₄(aq) → NaNO₃(aq) + Mg₃(PO₄)₂(s)

There is 1 atom of Mg on the left side and 3 atoms on the right. It can be balanced by writing 3 before Mg(NO₃)₂ as shown below:

3Mg(NO₃)₂(aq) + Na₃PO₄(aq) → NaNO₃(aq) + Mg₃(PO₄)₂(s)

There is 1 atom of P on the left side and 2 atoms on the right. It can be balanced by writing 2 before Na₃PO₄ as shown below:

3Mg(NO₃)₂(aq)  + 2Na₃PO₄(aq) → NaNO₃(aq) + Mg₃(PO₄)₂(s)

There are a total of 6 atom of Na on the left side and 1 atom on the right. It can be balanced by writing 6 before NaNO₃ as shown below:

3Mg(NO₃)₂(aq) + 2Na₃PO₄(aq) → 6NaNO₃(aq) + Mg₃(PO₄)₂(s)

Now, the equation is balanced.

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A neutral atom contains two charged particles; protons and electrons. Neutrons are neutral particles.

Neutrons and protons are present inside the nucleus of the atom. Electrons revolve around the nucleus of the atoms in orbital paths known as shells.

The number of electrons in an atom is always equal to the number of protons. Therefore, the charge on a neutral atom is always zero. When an atom loses or gains electrons, it becomes a charged particle. This charged particle is known as ion.

Therefore, only a neutral atom has zero charges.

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Answer:

Power plants are not located in cities. Power has to travel a long distance over power lines to reach cities.

Explanation:

In 250 mL of volumetric flask add 0.975875 grams of \(CaF_2\) and dissolve it in the 250 mL of water.

Given:

The solid of calcium fluoride.

To prepare:

The 250 mL solution of 0.100 M of fluoride ions from solid calcium fluoride.

Method:

Molarity of the fluoride ion solution needed = M = 0.100 M

The volume of the fluoride ion solution needed = V = 250 mL

\(1 mL = 0.001L\\V=250 mL=250\times 0.001 L=0.250 L\)

The moles of fluoride ion needed = n

According to the definition of molarity:

\(M=\frac{n}{V}\\0.100M=\frac{n}{0.250 L}\\n=0.100M\times 0.250 L=0.025 mol\)

Moles of fluoride ion = 0.025 mol

We know that solid calcium fluoride dissolves in water to give calcium ions and fluoride ions.

\(CaF_2(s)\rightarrow Ca^{2+}(aq)+2F^-(aq)\)

According to reaction, 2 moles of fluoride ions are obtained from 1 mole of calcium fluoride, then 0.025 moles of fluoride ions will be obtained from:

\(=\frac{1}{2}\times 0.025 mol=0.0125 \text{mol of } CaF_2\)

Moles of calcium fluoride = 0.0125 mol

Mass of calcium fluoride needed to prepare the solution :

\(=0.0125 mol\times 78.07 g/mol=0.975875 g\)

Preparation:

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Answer:

\(\huge\boxed{\sf no.\ of\ moles = 1.55\ moles }\)

Explanation:

Given:

Number of atoms = \(9.32 \times 10^{23}\) atoms

Avogadro's Number = \(6.023 \times 10^{23}\) atom / mol

Required:

Moles = ?

Formula:

\(\displaystyle No.\ of\ moles = \frac{no. \ of \ atoms }{avogadro's \ no.}\)

Solution:

\(\displaystyle no. \ of \ moles = \frac{9.32\times 10^{23}}{6.023 \times 10^{23}}\)

no. of moles = 1.55 moles

\(\rule[225]{225}{2}\)

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Answer:

1.44 g/cm^3

Explanation:

The equation for density is d=m/v.

Answer:

C2H2CaO6

Explanation:

Ca same

H × 2

C × 2

O3 × 2

I hope this helps you :)

The mass is only one quantity which is present in all of them .

1) The relationship between the mass and Molarity is

Molarity is directly proportional to the mass of solute.

2) Relation between Molality and mass is they both are directly proportional to each other.

3) Mole fraction is all about mass and and molar mass

Xa=Na /Nb+Na

where Na is the no of moles of A and Nb is no of moles of B .

4) The ratio of the mass of solute that is present in  a solution, relative to the volume of the solution as  a whole.

From above statement we can see that mass is common in very formula ,so that is why we tend assume the Mass.

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The seasons are a result of Earth's axis tilt. Diverse regions of Earth experience the Sun's strongest rays at various times of the year. The Northern Hemisphere experiences summer as a result of the North Pole's tilt towards the Sun. Winter also occurs in the Northern Hemisphere when the South Pole tilts towards the Sun.

The Sun rises in the east (far arrow), rises in the south (to the right) while travelling to the right, culminates in the west (close arrow), and sets in the east. In midsummer and midwinter, respectively, both the rising and set positions are moved to the north. The direction of south in the Southern Hemisphere is to the left.

In order to change our seasons, the Earth's 23.5 degree tilt is crucial.

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The preferred arrangement of electrons in a molecular structure can be determined by calculating the electronic configuration of each atom in the molecule.

What is electronic configuration?

The electronic configuration of an atom is determined by the number of protons in the nucleus and the specific rules governing the filling of energy levels and orbitals. The electronic configuration is usually represented using a notation that indicates the number of electrons in each energy level or orbital.

what is delocalized electron ?

Delocalized electrons are electrons that are not restricted to a specific location or region in a molecule or material, but instead are spread out over multiple atoms or molecules. In other words, delocalized electrons are free to move throughout a larger region instead of being confined to a single atom or bond.

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Answer:

The answer is 11 electron and 11 protons respectively

Explanation:

Since the sodium is in it neutral state, number of electron is the same as the number of proton, which is 11.

Answer:

Explanation:

you are welcome

Mass O2 = = 16.832 g

Given

43 grams of potassium chlorate

Required

Mass of O2

Solution

Reaction

2KClO3 ⇒3O2 + 2KCl

Mol KClO3 :

= mass : MW

= 43 g : 122,55 g/mol

= 0.3509

From the equation, mol O2 :

= 3/2 x moles KClO3

= 3/2 x 0.3509

= 0.526

Mass O2 :

= 0.526 x 32 g/mol

= 16.832 g

Answer: B.) -12.4

Explanation: This is because the sign of heat transfer is determined by the system's perspective. In this case, the system is releasing heat to the surroundings, which means that heat is flowing out of the system, making the heat transfer negative. The magnitude of the heat transfer is 12.4 J.

The particles that electromagnetic radiation consists of are called photons. These photons exhibit both wave and particle behavior. The greater the momentum of a photon, the shorter its wavelength.

Electromagnetic radiation is the emission of energy in the form of electromagnetic waves or photons from electrically charged particles. Electromagnetic radiation is classified according to its frequency or wavelength. The electromagnetic spectrum is a graphical representation of all the types of electromagnetic radiation, from gamma rays to radio waves.Photons have wave-particle duality, which means they behave like both particles and waves. This implies that they may have a certain amount of momentum as particles and can also exhibit diffraction as waves.The wavelength of a photon is inversely proportional to its momentum, and the greater the momentum of a photon, the shorter its wavelength. Photons, like all other particles, have momentum as a result of their mass and velocity. The energy and frequency of a photon are proportional to each other, with the frequency being inversely proportional to the wavelength.

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Answer:

hi how are you I am fine what about you

Biotechnology is the use of living organisms or other biological systems in the manufacture of drugs or other products or for environmental management, as in waste recycling: includes the use of bioreactors in manufacturing, microorganisms to degrade oil slicks or organic waste, genetically engineered bacteria to produce human hormones, and monoclonal antibodies to identify antigens.

Biotech offers the possibility of improving human health, the environment, and agriculture while creating more sustainable modes of production.

In noncyclic photophosphorylation, electrons flow in a one-way path from water to NADP⁺.

Photophosphorylation is the conversion of ADP to ATP by using the sunlight. the water molecules is split into the hydrogen and the oxygen this whole process is known as photolysis. In noncyclic photophosphorylation, electrons flow in a one-way path from water to NADP⁺ known as hill reaction. The process of cooperative production of energy is called as non cyclic photophosphorylation. The proton produces by the splitting of water molecule is combine with electron reduces the NDAP to NDAPH₂.

Thus, In noncyclic photophosphorylation, electrons flow in a one-way path from water to NADP⁺.

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Answer:

Volume = 3.4 L

Explanation:

In order to calculate the volume of CO₂ produced when 15.2 g of CaCO₃ is heated, we need to first write out the balanced equation of the thermal decomposition of CaCO₃:

CaCO₃ (s) + [Heat] ⇒ CaO (s) + CO₂ (g)

Now, let's calculate the number of moles in 15.2 g CaCO₃:

mole no. = \(\mathrm{\frac{mass}{molar \ mass}}\)

                 = \(\frac{15.2}{40.1 + 12 + (16 \times 3)}\)

                 = 0.1518 moles

From the balanced equation above, we can see that the stoichiometric molar ratios of CaCO₃ and CO₂ are equal. Therefore, the number of moles of CO₂ produced is also 0.1518 moles.

Hence, from the formula for the number of moles of a gas, we can calculate the volume of  CO₂:

mole no. = \(\mathrm{\frac{Volume \ in \ L}{22.4}}\)

⇒ \(0.1518 = \mathrm{\frac{Volume}{22.4}}\)

⇒ Volume = 0.1518 × 22.4

                 = 3.4 L

Therefore, if 15.2 g of CaCO₃ is heated, 3.4 L of CO₂ is produced at STP.

Answer:

To convert joules to calories, you can use the conversion factor:

1 calorie = 4.184 joules

To find out how many calories are in 4,180 joules, divide the given value by the conversion factor:

4,180 joules / 4.184 joules per calorie = 0.9 calories (approximately)

Therefore, there are approximately 0.9 calories in 4,180 joules.

Answer:

\(The \ phase\ with \ the \ greater \ density \ is \ \ \mathbf{Solid } \ \ argon \ because \ the \ liquid\)

\(slope \ of \ the \ solid/liquid \ \ equilibrium \ \ line \ (also \ called \ the \ fusion \ curve) \ is \ \ \mathbf{positive}\)

\(meaning \ that \ an \ increase \ in \ pressure \ on \ \ \mathbf{liquid } \ \ argon \ will \ result \ in \ the\)

\(formation \ of \ \ \mathbf{solid} \ \ argon.\)

Explanation:

A phase diagram is a graphical representation with axes, representing temperature and pressure, showing the equilibrium conditions of a given substance to be a solid, liquid, or gas.

From the information given, the substance here is Argon.

So, the phase diagram of Argon can be seen in the image below.

From the diagram, it is obvious that the slope of the fusion curve is positive. Hence, the density of the solid argon will be greater than that of the liquid argon.

Answer: Temperature measures thermal energy, and heat is the flow of thermal energy

Explanation:

Heat describes the transfer of thermal energy between molecules within a system. Heat measures how energy moves or flows. It is measured in Joules.

Temperature measures the hotmess or coldness of a body or how much thermal energy it contains . Temperature describes the average kinetic energy of molecules within a material or system. It is measured in Celsius (°C), Kelvin(K), or Fahrenheit (°F).

Thus the correct option is Temperature measures thermal energy, and heat is the flow of thermal energy

Answer:

its c

Explanation:

edg 2021

Mass/corresponding weight of liquefied phenol = 1.5408 grams

Mass/corresponding weight of propylene glycol = 63.6 grams

Given that :

Total volume of the water bottles = 24 * 15 ml

                                                        = 360 ml

Volume of recipe after pure water is added = 100 ml

the number of units required = Total volume of water / volume of recipe

                                                = 360 / 100 =  3.6 units

i) Determine the Mass ( weight ) of liquefied phenol

amount of liquefied phenol = 0.4 ml * 3.6 = 1.44 ml

given that density of liquefied phenol = 1.07 g/ml

∴ mass of liquefied phenol = density * volume

                                         = 1.07 * 1.44 = 1.5408 grams

ii) Mass( weight ) of propylene glycol

amount = 17 * 3.6 =  61.2 ml

density of propylene glycol = 1.04 g/ml

∴ mass of propylene glycol = 61.2 * 1.04 = 63.648 grams

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The speed of sound is the speed at which sound travels from one point to another.

The speed of sound is the speed at which sound travels from one point to another. We know that the speed of sound varies from place to pace owing to the density ad the kind of particles that are found in the medium.

Thus, we are going to convert the following now to units of meter per second.

1) For 5.4 × 103 cm/s we have  5.4 × 10^3 cm/s /100 = 54 m/s

2) For 1.97 × 104 ft/s  we have r 1.97 × 10^4 ft/s / 0.3048 = 6.46 m/s

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How you can check to make sure your work is error-free is by:

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