What is Displacement reaction . Explain with an example.​

Answer:

a) alternate interior angles are congruent

Explanation:

on edgen

Answer:

A mixture of chlorine gas (Cl2) and fluorine gas (F2):

✔ London dispersion forces

Explanation:

The frequency is used to measure the number of waves that pass through a fixed point in a certain amount of time. That is option B.

A wave is defined as a disturbance in a medium that travel from a point to another in an organised fashion.

There are different properties of a wave that include the following:

The frequency of a wave is defined as the property of a wave that shows the the number of crests (high points) of waves that pass the fixed point in a given number of time.

Therefore, frequency of a wave measures the number of waves that pass through a fixed point in a certain amount of time.

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Wave frequency measures the waves that pass through a fixed point in a certain amount of time (option B)

Frequency of a wave is defined as the number of complete oscillations, vibrations or waves made in 1 second. This is written formula:

Frequency (f) = Number of oscillation (n) / time (s)

f = n / t

The SI unit of wave frequency is Hertz.

Wave frequency is related to speed of wave and wavelength according to the following formula:

Velocity (v) = wavelength (λ) × frequency (f)

v = λf

Wave frequency is also related to the period of a wave according to the following formula:

Frequency (f) = 1 / Period (T)

f = 1 / T

With the above information about wave frequency, we can conclude that the correct answer to the question is option B

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Answer:

when 445 grams of H2O are reacted, 4,300 grams (or 4.3 kilograms) of MnO2 are produced.

Explanation:

The balanced chemical equation for the reaction is:

16H+ (aq) + 2MnO4- (aq) + 10Br- (aq) → 2MnO2 (s) + 5Br2 (aq) + 8H2O (l)

According to the equation, 2 moles of MnO4- react to produce 2 moles of MnO2. Therefore, we need to find out the number of moles of MnO4- that react with the given amount of H2O and then use stoichiometry to calculate the number of moles of MnO2 produced.

First, let's calculate the number of moles of H2O:

mass of H2O = 445 g

molar mass of H2O = 18.015 g/mol

number of moles of H2O = mass/molar mass = 445 g/18.015 g/mol = 24.7 mol

From the balanced equation, we can see that 1 mole of H2O reacts with 2 moles of MnO4-. Therefore, the number of moles of MnO4- required to react with 24.7 mol of H2O is:

number of moles of MnO4- = 2 × number of moles of H2O = 49.4 mol

Since 2 moles of MnO4- produce 2 moles of MnO2, we can say that 1 mole of MnO4- produces 1 mole of MnO2. Therefore, the number of moles of MnO2 produced is also 49.4 mol.

Finally, we can calculate the mass of MnO2 produced:

mass of MnO2 = number of moles of MnO2 × molar mass of MnO2

mass of MnO2 = 49.4 mol × 86.94 g/mol = 4,300 g

Therefore, when 445 grams of H2O are reacted, 4,300 grams (or 4.3 kilograms) of MnO2 are produced.

Answer:

The Northern Hemisphere is tilted away from the sun.

Explanation:

Kevin travels from the United States to Australia for the winter, but when he gets there it feels more like summer. Which statement explains this? The Northern Hemisphere is tilted away from the sun. When it is winter, the United States receives the least direct solar energy, as compared with the rest of the year.

The answer is B) The Southern Hemisphere is experiencing an equinox.

The two days of the year on which neither hemisphere is tilted toward or away from the sun.

This means that if he goes to the Northern Hemisphere it will be warm. And if he goes to the Southern, he will be warm too.

The Southern Hemisphere is experiencing an equinox.

Kevin travels from the United States to Australia for the winter, but when he gets there it feels more like summer. Which statement explains this? The Northern Hemisphere is experiencing an equinox. The Southern Hemisphere is experiencing an equinox. The Southern Hemisphere is tilted toward the sun, so it is summer in Australia.

Therefore, your answer is B) The Southern Hemisphere is experiencing an equinox.

If this helped then..

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Although sodium and phosphorus are both found in the same period of the periodic table, the nature of their oxides is different. Although P2O5 is acidic, Na2O is basic.

Metal oxides are basic, whereas non-metal oxides are acidic. The metallic character of the elements lessens as you move from left to right over time, while the non-metallic character grows.

Since the oxides in an element's higher oxidation state are more acidic than those in its lower oxidation state, dinitrogen pentoxide is the most acidic oxide compared to nitrogen dioxide and nitrogen tetraoxide.

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Answer:

ako po kailangan ko po nga ayuda

Explanation:

thanks for the points ❤️

A. The limiting reactant is copper (I) oxide

B. The theoretical yield of copper is 384 grams

C. The percent yield would be  96.56%

D. The amount of excess reagent that remains would be 103 grams.

The balanced equation of the reaction is as follows: \(2Cu_2O + Cu_2S -- > 6Cu + SO_2\)

The mole ratio of the reactants is 2:1.

Mole of 286.2 g of copper (I) oxide = 286.2/143 = 2 mol

Mole of 262.2 g of copper (I) sulfide = 262.2/159 = 1.65 mol

Going by the mole ratio, copper (I) oxide is limiting. The actual amount of copper (I) sulfide required would be:

1/2 x 1 = 1 mol

Thus, excess copper (I) sulfide = 1.65 - 1 = 0.65 mol

0.65 mol = 0.65 x 159 = 103 grams

To get the theoretical yield of copper: mole ratio of copper (I) oxide and copper produced = 1:3

2 mole of copper (I) oxide = 6 moles of copper

6 mol copper = 6 x 64 = 384 grams

If the actual yield is 370.8 grams:

Percent yield = 370.8/384 x 100

                      = 96.56%

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Answer:

Si14- Si^4+

As33- As^3-

Mg12- Mg^2+

Rb37- Rb^+

F9- F^-

Ge32- Ge^4+

Sn50- Sn^2+, Sn^4+

Explanation:

The elements shown in the answer have their common ions written beside them.

Silicon mostly forms positive ions in oxyacids and complex ions. Arsenic mostly forms its anion. Magnesium forms only the +2cation just as rubidium only forms the +1 cation. The fluoride ion is F^- while tin may for a +2*or +4 cation. Germanium usually forms the +4 cation.

Answer:

d

Explanation:

i just did it

The  functional group in the following molecule CH₃CH₂OCH₂CH₃ is ether.

Functional group is defined as a substituent or group of atoms or an atom which causes chemical reactions.Each functional group will react similarly regardless to the parent carbon chain to which it is attached.This helps in prediction of chemical reactions.

The reactivity of functional group can be enhanced by making modifications in the functional group .Atoms present in functional groups are linked to each other by means of covalent bonds.They are named along with organic compounds according to IUPAC nomenclature.

Functional group inter conversion is also possible by retro -synthesis.In some cases , functional groups can be charged molecules.

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The partial charges on each fluorine atom are negative. Option B) The central O atom is the correct answer. Option B

The partial charges in a molecule are determined by the electronegativity values of the atoms involved. Electronegativity is the ability of an atom to attract electrons towards itself in a chemical bond. In the case of \(F_2O\), fluorine (F) is more electronegative than oxygen.

Fluorine is the most electronegative element on the periodic table, meaning it has a high ability to attract electrons. Oxygen is also relatively electronegative but less so than fluorine. When fluorine atoms bond with oxygen, the shared electrons will be pulled more towards the fluorine atoms, creating a polar covalent bond.

In \(F_2O\), each fluorine atom will pull the shared electrons towards itself, resulting in a higher electron density around the fluorine atoms. This creates a region of partial negative charge around the fluorine atoms.

Conversely, the oxygen atom will have a region of lower electron density and, therefore, a partial positive charge. This is because the shared electrons spend more time around the fluorine atoms due to their higher electronegativity.

Option B

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The pH of the buffer solution can be determined using Henderson equation. The pH is obtained as 4.51.

A buffer solution is a solution with constant pH and its maintains the pH of a solution upto a desired point. The pH of a buffer solution is determined using Henderson equation as written  below:

pH = Pka + ln [A-]/[HA]

Where, [A-] be the concentration of the salt and [HA ] be that of the acid.

Given that 10 g of acid and its salt are dissolved in 1 L solution. Thus,

no.of moles of acid = 10 g / 46  = 0.217 in L means 0.217 M

concentration of salt = 10 g/ 84 g in one L = 0.119 M.

ka = 1.8 × 10⁴

pka = log Ka = 4.25

pH = 4.25 + ln (0.119 / 0.217)

     = 4.51

Therefore, the pH of the solution is 4.51.

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The methyl orange indicator will change from red to yellow at the titration's endpoint.

An acid-base indicator called methyl orange changes color between the pH ranges of 3.1 and 4.4. In acidic and basic solutions it is red and yellow, respectively

In this instance, an acid, hydrochloric acid, is being used to titrate the barium hydroxide solution. The pH of the solution will fall as we add the acid since it will neutralize the base. The hue of the methyl orange indicator will vary when the pH ranges from 3.1 to 4.4

All of the barium hydroxide will have interacted with the hydrochloric acid by the time the titration is complete leaving a neutral solution. When the methyl orange indicator becomes yellow the solution's pH is in the basic range.

Therefore, the methyl orange indicator will change from red to yellow at the titration's endpoint.

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Answer:

12.5g

Explanation:

Half life = 2.4 Minutes.

The half life of a compound is the time it takes to decay to half of it's original concentration or mass.

Time lapsed= 7.2 minutes. This is equivalent to 3 half lives ( 3 * 2.4)

Initial mass = 100g

First half life;

100g --> 50g

Second half life;

50g --> 25g

Third half life;

25g --> 12.5g

The amount of Zn-71 that remains after 7.2 mins has elapsed is 12.5 g

We'll begin by calculating the number of half-lives that has elapsed. This can be obtained as follow:

Half-life (t½) = 2.4 mins

Time (t) = 7.2 mins

\(n = \frac{t}{t_{1/2}} \\\\n = \frac{7.2}{2.4} \\\\\)

Thus, 3 half-lives has elapsed.

Original amount (N₀) = 100 g

Number of half-lives (n) = 3

\(N = \frac{N_{0}}{2^{n}} \\\\N = \frac{100}{2^{3 }}\\\\N = \frac{100}{8}\\\\\)

Thus, the amount of Zn-71 that remains after 7.2 mins is 12.5 g

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The chemical formula O₂ which is oxygen is a molecule as it is made up  of 2 oxygen atoms.

Chemical  formula is a way of representing the number of atoms present in a compound or molecule.It is written with the help of symbols  of elements. It also makes use of brackets and subscripts.

Subscripts are used to denote number of atoms of each element and brackets indicate presence of group of atoms. Chemical formula does not contain words. Chemical formula in the simplest form  is called empirical formula.

It is not the same as structural formula and does not have any information regarding structure.It does not provide any information regarding structure of molecule as obtained in structural formula.

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Answer: They grow deep, allowing plants to gather water from far below Earth's surface- D

Explanation: Sorry I dont have time to explain its D on edgen

To solve this we must be knowing each and every concept related to gymnosperms. Therefore, the roots that gymnosperms  grow deep, allowing the plants to gather water from far below Earth’s surface. The correct option is option D.

Unlike angiosperms, and flowering plants, because seeds are closed by fully developed ovaries, or fruits, gymnosperms, or any vascular plant, reproduce by the use of a exposed seed, or ovule.

Many gymnosperms bear their seeds in cones, which are known as "seeds" because they are never visible until they are fully developed. The roots that gymnosperms  grow deep, allowing the plants to gather water from far below Earth’s surface.

Therefore, the roots that gymnosperms  grow deep, allowing the plants to gather water from far below Earth’s surface. The correct option is option D.

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Answer:

\(n_O=6.00molO\)

Explanation:

Hello.

In this case, since the molecular formula of barium sulfate is:

\(BaSO_4\)

Which has four oxygen atoms, we can also say that one mole of barium sulfate has four moles of oxygen; in such a way, the moles of oxygen atoms in 1.50 moles of barium sulfate are:

\(n_O=1.50molBaSO_4*\frac{4molO}{1molBaSO_4} \\\\n_O=6.00molO\)

Best regards.

Answer:

21.46 kg.

Explanation:

Hello!

In this case, when a variety of measurements are said to contribute to a total, we understand we need to add them all up in order to get that total; in such a way, since the given seafood is composed by 15 kg of salmon, 4.7 kg of crab and 1.76 kg of oysters, the total mass turns out:

\(m_T=15kg+4.7kg+1.76kg\\\\m_T=21.46kg\)

Best regards!

The rate constant for the reaction is either 7.14×10−3 s−1 or 2.50×10−3 s−1, depending on which rate was used to calculate it.

The rate of the reaction is given by the equation:

Rate = -k[A]

where k is the rate constant and [A] is the concentration of the reactant.

Rate at t=140 s:

Rate = (8.00×10−2 M - 0 M) / (140 s - 0 s)

= 5.71×10−4 M/s

Rate at t=400 s:

Rate = (4.00×10−2 M - 0 M) / (400 s - 0 s)

= 1.00×10−4 M/s

Since this is a zero-order reaction, the rate of the reaction is constant, and we can use either rate to calculate the rate constant:

k = Rate / [A]

Using the rate at t=140 s:

k = 5.71×10−4 M/s / 8.00×10−2 M = 7.14×10−3 s−1

Using the rate at t=400 s:

k = 1.00×10−4 M/s / 4.00×10−2 M

= 2.50×10−3 s−1

The rate constant for the reaction is either 7.14×10−3 s−1 or 2.50×10−3 s−1.

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Answer:

amplitude= distance between midpoint of a wave and crest

crest= highest point of transverse wave

wavelength= distance traveled in one wave cycle

medium= matter distributed by energy

trough=lowest point of transverse wave

frequency=number of waves that pass per second

Explanation:

A wave is a dynamic perturbation of one or even more quantities that propagates in a specific medium.

A wave is a dynamic perturbation of one or even more quantities that propagates in physics, mathematics, or related sciences. When waves oscillate frequently around an equilibrium position at a certain frequency, they are said to be periodic. A traveling wave is one in which the whole waveform moves inside one direction; in contrast, a standing wave is one in which two periodic waves are overlaid and move in the opposing directions.

In a wave form, there are some points in which the wave amplitude seems reduced or even zero, and these positions have null vibration amplitudes. A wave equation or perhaps a one-way wave equation describing single wave propagation inside a specific direction is frequently used to describe waves.

amplitude= distance between midpoint of a wave and crest

crest= highest point of transverse wave

wavelength= distance traveled in one wave cycle

medium= matter distributed by energy

trough=lowest point of transverse wave

frequency=number of waves that pass per second

Therefore, a wave is a dynamic perturbation of one or even more quantities that propagates

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The smallest difference between two objects that can be faithfully detected by a measuring device would be resolution.

Other options are incorrect because:

Resolution, on the other hand, refers to the smallest measurable distance between two points or objects. Hence, the correct option is resolution.

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Answer:

Mass of Nacl = 4.92 gram (Approx)

Explanation:

Given:

Hydrochloric acid = 3.3 g

Sodium hydroxide = 5 g

Computation:

Hcl + NaoH ⇒ Nacl + H₂O

Number of mole of Hcl = 3.3 / 36.46 = 0.0905 moles

Number of mole of NaoH = 5 / 40 = 0.125 moles

We, know that number of moles in Hcl is less then number of mole in NaoH

So,

Number of mole of Hcl = Number of mole of Nacl

So,

Mass of Nacl = Number of mole of Nacl × Molar mass of Nacl

Mass of Nacl = 0.0905 × 54.4

Mass of Nacl = 4.92 gram (Approx)

Answer:

.

Explanation:

.

Answer:

Option B is correct.

Only this option has the first underlined element with a lower oxidation number than the second amongst the options.

Explanation:

Complete Question

In which pair of substances does the first underlined atom have a lower oxidation number than the second?

A. NH₃OH⁺, NH₄⁻ (N is underlined)

B. H₂O, H₂O₂ (O is underlined)

C. SO₃, SO₄²⁻ (S is underlined)

D. HCHO, C (C is underlined)

Solution

In determination of the oxidation number of an atom in a compound, we first name the unknown oxidation number x.

Then, the total oxidation number of the atoms in the compound is equal to the charge of on the compound (or radical).

So, elements in their neutral state have no charge and no oxidation number.

A. NH₃OH⁺, NH₄⁻ (N is underlined)

N in NH₃OH⁺

Oxidation number of N = x

Oxidation number of H = +1

Oxidation number of O = -2

x + (3×+1) + (-2) + (+1) = +1

x - 3 - 2 + 1 = 1

x = +5

N in NH₄⁻

Oxidation number of N = x

Oxidation number of H = +1

x + (4×1) = -1

x + 4 = -1

x = -1 - 4 = -5

First underlined element has a greater oxidation number than the second. So, this doesn't qualify.

B. H₂O, H₂O₂ (O is underlined)

O in H₂O

Oxidation number of H = +1

Oxidation number of O = x

(2×1) + x = 0

2 + x = 0

x = -2

H₂O₂

Oxidation number of H = +1

Oxidation number of O = x

(2×1) + (2×x) = 0

2 + 2x = 0

2x = -2

x = (-2/2) = -1.

First underlined element has a lower oxidation number than the second. So, this qualifies.

C. SO₃, SO₄²⁻ (S is underlined)

S in SO₃

Oxidation number of S = x

Oxidation number of O = -2

x + (3×-2) = 0

x - 6 = 0

x = +6

SO₄²⁻

Oxidation number of S = x

Oxidation number of O = -2

x + (4×-2) = -2

x - 8 = -2

x = 8 - 2 = +6

First underlined element has the same oxidation number as the second. So, this doesn't qualify.

D. HCHO, C (C is underlined)

C in HCHO

Oxidation number of H = +1

Oxidation number of C = x

Oxidation number of O = -2

+1 + x + 1 - 2 = 0

x = 0

C in C

Oxidation number of C = x

x = 0

First underlined element has the same oxidation number as the second. So, this doesn't qualify.

Hope this Helps!!!

Answer:

When the light energy from sunlight hits matter, heat energy is formed

Answer:

A

Explanation:

when light energy hit matter heat energy formed

Answer:

heated the water

Explanation:

The moles of N2 formed when 38 moles of CuO is consumed 12.66 mol.

What is moles?

A mole of a substance can be defined as an amount of substance having 6.022 x 10^23 particles in it. This number is known as Avogadro's number. All the balanced chemical equations are written using number of moles of reactants and products.

The balanced chemical equation of the reaction can be written as,

2 NH3 + 3 CuO ------> 3 Cu + N2 + 3 H2O

Here, 2 moles of ammonia is reacting with 3 moles of CuO to give 3 moles of Cu, 1 mole of N2 and 3 moles of water. So when 38 moles of CuO is consumed,

Moles of N2 = 38 x 1 / 3 = 12.66 mol.

Therefore, 12.66 mole of N2 is formed when 38 moles of CuO is consumed in the reaction.

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The molar mass of hydrogen sulfide is 34.1 g/mol.

To begin, rearranging the equation to determine the number of moles in this solution. No. Molarity (M) x Volume (L) = 0.5 x 2. = 1 mol.

The molar mass of NaCl is 58.44 g/mol. We may now utilize the rearranged equation. (g) = No. 1 x 58.44 = 58.44 g. Moles (mol) × Molar Mass (g/mol) = 1 x 58.44 = 58.44 g.

1 milliliter = 1 gram of water. The weight of the other components varies. 1 mL of milk equals 1.04 g, 1 mL of flour = 0.53 g, and 1 mL of sugar equals 0.85 g.

The concentration represents the solution’s mass concentration, which is represented in density units (often g/l or g/ml). Molar mass is the mass of one mole of a substance.

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