liquid homogeneous mixture​

Answer:

the volume is 12.79ml

Explanation:

12.8+12.7+12.78+12.88=51.16

51.16/4

=12.79

Answer:

He supported the ideology of Marxism.

He opposed the tsar and was exiled.

He led the Bolsheviks.

Explanation:

Lenin was Russian Revolution political theorist. He served as first founding head of government of Soviet Russia. He supported the ideology of Marxism and opposed Tsar.

Answer:

Sodium oxide is the product

Explanation:

4Na+O2->2Na2O

Because of aromaticity, benzene is significantly more stable than one would expect for a compound with three alkenes in a ring.

Aromaticity refers to a property of certain cyclic organic compounds that possess a ring of atoms with delocalized electrons, which creates a particularly stable molecular structure. In benzene, the six carbon atoms form a planar, hexagonal ring with three double bonds, which creates a system of six pi electrons that are delocalized throughout the ring. This arrangement of electrons creates a particularly stable structure that is resistant to addition reactions and other forms of chemical reactivity. Additionally, the delocalization of electrons in the pi system creates a uniform distribution of electron density around the ring, which results in a lack of dipole moment and non-polar nature of the molecule. Overall, the unique electronic structure created by the aromaticity of benzene is responsible for its exceptional stability and resistance to chemical reactions, which has made it an important component of many industrial and pharmaceutical applications.

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Answer:

0.25

Explanation:

The first step is to determine how many moles of glucose there are, which means first finding out the molar mass of glucose. Carbon has a molar mass of about 12, hydrogen 1, and oxygen 16, so the total molar mass of glucose is about 6(12)+12(1)+6(16)=180 grams. This means that 90 grams is half a mole. Half a mole of substance divided by two liters of solution is (1/2)/2=1/4, or a molarity of 0.25. Hope this helps!

The molar concentration of Na ions in 0.0400 M solutions of NaCl, Na2CO3, and Na3PO4 in water are 0.0400 M, 0.0800 M, and 0.1200 M, respectively

The molar concentration of Na ions can be calculated using the formula:

Molar concentration of Na ions = molarity of the sodium salt x number of Na ions per formula unit

For the given sodium salts:

1. NaCl
Number of Na ions per formula unit = 1
Molar concentration of Na ions = 0.0400 M x 1 = 0.0400 M

2. Na2CO3
Number of Na ions per formula unit = 2
Molar concentration of Na ions = 0.0400 M x 2 = 0.0800 M

3. Na3PO4
Number of Na ions per formula unit = 3
Molar concentration of Na ions = 0.0400 M x 3 = 0.1200 M

Therefore, the molar concentration of Na ions in 0.0400 M solutions of NaCl, Na2CO3, and Na3PO4 in water are 0.0400 M, 0.0800 M, and 0.1200 M, respectively.

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Because K and Cl have such a large disparity in their electronegativities, KCl is a bipolar ionic molecule.

Polar covalent bonds develop when the distribution of electrons among atoms is uneven, whereas nonpolar side chains develop when the distribution of electrons is more even. The reason for the unequal sharing of electrons is because the atoms receiving them have various electronegativities.

Whenever a single pair of electrons is not shared equally, a polar molecule bond is created. This is caused by the electronegativity difference between the two elements. An unit of h as well as an unit of bromine share a pair of electrons, but not evenly.

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Answer:

because its hard as a rock, rn

Explanation:

Answer:

well you can cook it how ever long you want but many people cook is slow

Explanation:

Answer:

B

Explanation:

production ca3(PO4)2

4x2=8

The density of liquid 1 is greater than the density of liquid 2. Because the liquids do not mix and liquid 1 rests on top of liquid 2 in the U-tube, the denser liquid will be at the bottom and the less dense liquid will be at the top. This is due to the principle of buoyancy, which states that an object will float or sink in a fluid depending on its density relative to the fluid.

I believe the density p1 is greater than the density p2.

Since the liquid is at equilibrium in the open U-tube, the pressure at which the liquids meet should be the same. That is at the position where they are in contact, the pressure that liquid 1 exerts at that point is the same as the pressure exerted by liquid 2 at the point.

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Answer: The Mass of an electron is 9.1093837 x 10^-31 kgs

Explanation:

Answer: NaCl is an ionic compound

Explanation: Sodium Chloride is formed from Na+ and Cl- ions.

It is soluble in water, it has crystalline structure, it has high melting point and

It is insulator as solid form. Water solution leads current.

Answer:

is there choices you have to pick from

Explanation:

or do you have to describe a covalent bond ?

Answer:

sharing of electron between two atoms

Explanation:

these electrons are simultaneously attracted by two atomic nuclei..covalent bond are formed when the difference between the electronegativities of two atoms is too small for an electron transfer to occur to form ions.

The balanced nuclear equations for the following:(c) Alpha decay of ²¹²₈₃Bi is ^22688Ra → ^22286Rn + ^42He

Alpha decay usually occurs in heavy nuclei such as uranium or plutonium, and therefore is a major part of the radioactive fallout from a nuclear explosion.

Alpha decay occurs most often in massive nuclei that have too large a proton to neutron ratio. An alpha particle, with its two protons and two neutrons, is a very stable configuration of particles.

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Increasing [Ag+] should be done in the following order: Solution X, Solution Y, and Solution Z. saturated solution.

What is saturated solution?

A saturated solution is one in which, at a specific temperature and pressure, the maximum amount of solute has been dissolved. In other words, under those circumstances, no additional solute can be dissolved in the solvent.

.We must evaluate the solubility of silver compounds in each saturated solution in order to establish the sequence of increasing [Ag+] (silver ion concentration) for the solutions X, Y, and Z.

AgCl, followed by AgBr and AgI, has the lowest solubility product constant (Ksp) value, as can be seen from the table. The solubility of the molecule and the concentration of the corresponding ions in the solution decrease with decreasing Ksp values.

Based on this knowledge, we can arrange the answers in the following sequence, increasing [Ag+]:

Solution Z: AgI will produce the highest [Ag+] concentration since it is the most soluble of the three silver compounds.

Solution Y: Because AgBr is less soluble than AgI, Solution Y will have a lower [Ag+] concentration than Solution Z but a greater concentration than Solution X.

The lowest [Ag+] concentration among the solutions may be found in Solution X, which contains AgCl, which is the least soluble of the three silver compounds.

Therefore, increasing [Ag+] should be done in the following order: Solution X, Solution Y, and Solution Z.

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The number of moles of PbSO₄(s) precipitated from the resulting solution would be 0.0141 moles.

A precipitation reaction will take place in which the Na₂SO₄(aq) and Pb(NO₃)₂(aq) will react and form PbSO₄(s) solid and NaNO₃(aq).

This is the balanced chemical reaction that takes place:Na₂SO₄(aq) + Pb(NO₃)₂(aq) → PbSO₄(s) + 2NaNO₃(aq)

We first need to determine the number of moles of Na₂SO₄(aq) that is available:0.0200 L × 0.00187 mol/L = 3.74 × 10⁻⁵ mol Na₂SO₄(aq)

Since the reaction has a 1:1 molar ratio between Na₂SO₄(aq) and PbSO₄(s), the number of moles of PbSO₄(s) that will form will be the same.

Therefore, 3.74 × 10⁻⁵ mol PbSO₄(s) will form.In order to calculate the mass of PbSO₄(s) that will precipitate out, we can use the formula:m = n × MM

where m = mass in grams, n = number of moles, and MM = molar mass of PbSO₄The molar mass of PbSO₄ is:1 Pb + 1 S + 4 O = 207.2 g/molSo, mass of PbSO₄(s) = 0.00775 g

We can use the solubility product constant (Ksp) to determine if all of the PbSO₄(s) will precipitate out.Ksp = [Pb²⁺][SO₄²⁻] = 2.5 × 10⁻⁸[Pb²⁺] = [SO₄²⁻] = xMoles of Pb²⁺ and SO₄²⁻ = 0.0141 mol

The molarity of PbSO₄(s) is thus:0.0141 mol ÷ 0.051 L = 0.276 M

This is greater than the Ksp of 2.5 × 10⁻⁸, so not all of the PbSO₄(s) will precipitate out.

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Answer:

Hello! Lithium is a Alkali metal, and is located on the left of the periodic table, right below Hydrogen (H), and right above Sodium (NA) .

Fluorine is located on the right of the table, next to Oxygen (O) and Neon (NE), and right above Chlorine (Cl).

Hope this helps !! :)

Explanation:

We have to balance the following equation:

__ H₂O + __ F₂ -------> __ HF + __ O₂

First we have to determine the number of atoms of each element that we have on both sides of the equation.

__ H₂O + __ F₂ -------> __ HF + __ O₂

O: 1 O: 2

H: 2 H: 1

F: 2 F: 1

We have 2 atoms of O on the right side and 1 atom of O on the left side. To balance the O atoms we can change the coefficient for H₂O and write a 2 in front of it.

2 H₂O + __ F₂ -------> __ HF + __ O₂

O: 2 O: 2

H: 4 H: 1

F: 2 F: 1

Then we have 4 atoms of H on the left and 1 atom of H on the right side of the equation. We can change the coefficient for HF to balance the H atoms.

2 H₂O + __ F₂ -------> 4 HF + __ O₂

O: 2 O: 2

H: 4 H: 4

F: 2 F: 4

And finally we have 2 atoms of F on the left and 4 atoms of F on the right. We can change the coefficient for F₂ and write a 2 there.

2 H₂O + 2 F₂ -------> 4 HF + __ O₂

O: 2 O: 2

H: 4 H: 4

F: 4 F: 4

The equation is balanced.

Answer: 2 H₂O + 2 F₂ -------> 4 HF + O₂

Answer:

A and D option

Explanation:

Erosion amd Compaction

Answer

The formula form of Manganese (IV) perbromate is

Explanation

The formula of Manganese is Mn

The formula for perbromate is BrO₄⁻

Oxidation number of Manganese (IV) = +4, That is Manganese (IV) is Mn⁺⁴

Therefore, multiply the charge of manganese by 1 and perchlorate by 4 t

Answer:

The correct answer is - reduce carbon emission, decrease deforestation snd increase plantation, use renewable energy.

Explanation:

Global warming is the process that is caused by human activities to increase the temperature of the earth. It increases the heat of the climate of the earth that leads to a negative impact on the environment. Increasing the greenhouse gas emission leads to trapping heat and cause global warming.

The three major solutions are:

1. reduce carbon and greenhouse gases: The main cause of global warming is the emission of greenhouse gases and an increase in carbon in the atmosphere, so reduce these gas emissions by avoiding fossil fuels that release carbon.

2. reduce deforestation and increase the plantation: trees take carbon dioxide from the environment, So prevent them from cutting and planting new trees will help reducing carbon from the environment.

3. Using renewable energy will help them to not depend on fossil fuels or water waste that will help in reducing global warming.

For the first query, the total reaction would take 7 moles of zinc and 7 moles of hydrochloric acid. This is because the equation specifies that in order to generate one mole of zinc chloride and one mole of hydrogen gas, two moles of hydrochloric acid are required for every mole of zinc.

Regarding the second query, it would need 4.6 moles of zinc to make 2.3 moles of zinc chloride. This is due to the equation's assertion that two moles of zinc are required for every mole of zinc chloride generated in order for the metal to react with hydrochloric acid.

In the third case, 3.6 moles of zinc would react completely with 7.2 moles of hydrochloric acid.

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To determine the stability of the given closed-loop transfer functions, we need to analyze the locations of the poles in the complex plane. If all the poles have negative real parts, the system is stable.

If any pole has a positive real part, the system is unstable. If there are poles on the imaginary axis or have zero real parts, further analysis is required.

a) Transfer function: 8Kc / (5S + 1)

The pole of this transfer function is at S = -1/5. Since the real part of the pole is negative, the system is stable.

b) Transfer function: 8Kc / (S^2 + 3S + 2)

The poles of this transfer function are at S = -1 and S = -2. Both poles have negative real parts, so the system is stable.

c) Transfer function: 8Kc / (S^3 + 6S^2 + 12S + 8 + 8Kc)

To determine the stability of this transfer function, we need to find the roots of the polynomial in the denominator. The characteristic equation is S^3 + 6S^2 + 12S + 8 + 8Kc = 0.

By analyzing the roots of the characteristic equation for different values of Kc, we can determine the stability. If all the roots have negative real parts for any value of Kc, the system is stable.

However, without a specific value for Kc provided, we cannot conclusively determine the stability of the system. The stability of the system will depend on the specific value of Kc and the locations of the roots of the characteristic equation. Further analysis is required to determine the stability.

In summary:

a) The system is stable.

b) The system is stable.

c) The stability requires further analysis as it depends on the specific value of Kc and the locations of the roots of the characteristic equation.

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Answer:

C. Lower Electronegativity

Periodic table is divided into metals, non metals, semiconductors and noble gases on the basis of electron gain or loss. Metals have lower electronegativity. The correct options is option C.

Metals are those elements which is hard, conduct electricity, ductile, lustrous and malleable.

Lets take properties

1.Since metals have free electrons that's why they can conduct electricity.

2. Since atoms in metals are very closely packed in a definite crystal so these are solid. Metals are not brittle that is, it can not be broken down easily

3.Metals  do not react with water easily.

4.Metals are denser than water hence sink in water.

5. Metals are meant to give electrons so these have low ionization energy. and lower electronegativity.

6. Metals form basic form of oxide.

7. Metals have lower electron shielding.

Therefore the correct options is option C.

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The final temperature of the gas is approximately 0.04218 k. To calculate the final temperature of the gas, we can use the formula:

(V1/T1) = (V2/T2)

where V1 and T1 are the initial volume and temperature, and V2 and T2 are the final volume and temperature. We can rearrange this formula to solve for T2:

T2 = (V2/T1) * V1

Plugging in the given values, we get:

T2 = (5.800/275.0) * 2.000

T2 = 0.02109 * 2.000

T2 = 0.04218 k

Therefore, the final temperature of the gas is approximately 0.04218 k.

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The molar solubility of Na3PO4 in a saturated solution where [Na+] = 0.30 M is 1.0 x 10^-26 M.

The molar solubility of Na3PO4 can be determined using the solubility product constant (Ksp) expression for the dissociation reaction of Na3PO4:
Na3PO4(s) ⇌ 3Na+(aq) + PO43-(aq)
Ksp = [Na+]^3[PO43-]
Since the solution is saturated, the concentration of Na+ is given as 0.30 M. Therefore, we can substitute this value into the Ksp expression and solve for the molar solubility (x) of Na3PO4:
Ksp = (0.30 M)^3 (x)
Simplifying the expression, we get:
Ksp = 0.027x
Rearranging the equation, we can solve for x:
x = Ksp / 0.027
The value of Ksp for Na3PO4 is 2.7 x 10^-28 (at 25°C), so substituting this value into the equation gives:
x = (2.7 x 10^-28) / 0.027
x = 1.0 x 10^-26 M
Therefore, the molar solubility of Na3PO4 in a saturated solution where [Na+] = 0.30 M is 1.0 x 10^-26 M.

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Which of the following factors can precipitate as po₄³⁻ ions in an aqueous solution: ca²⁺.

Precipitate: In chemistry, a stable substance occurs due to a chemical reaction that reduces the solubility of a solid or an exchange of reactions due to a change in temperature. In meteorology, precipitation is liquid or strong water falling from the sky (rain, snow, etc.). Fehling's solution is blue due to dissolved Cu2. When silver nitrate and sodium chloride are mixed with water, the silver chloride precipitates out of the solution as a heavy precipitate. In this situation, the precipitate is silver chloride.

A precipitate has a strong form in a chemical reaction that is unique to both reactants. This occurs when solutions containing ionic compounds combine to form insoluble products. Sediment identification can usually be addressed by reviewing solubility recommendations. The correct answer is a homogeneous aggregate of two or more materials. A precipitate is a stable substance that separates from the solution as in a chemical reaction.

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