Another type of stress is a change in ______________.
A) temperature B) liquid C) solid D) catalyst

Answer:

3 electrons more

explanation

minus sign in chemistry means more

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Answer:

Percentage of yield = 1%

Explanation:

Given:

Amount of yield = 5g

Total amount of product = 500 gram

Find:

Percentage of yield = ?

Computation:

⇒ Percentage of yield = [Amount of yield / Total amount of product]100

⇒ Percentage of yield = [5g / 500g]100

⇒ Percentage of yield = [0.01]100

⇒ Percentage of yield = 1%

Answer:

sublimation

Explanation:

solid => liquid   Melting

liquid => solid   freezing

liquid => gas     evaporation

gas => liquid     condensation

solid => gas      sublimation

gas => solid      deposition (e.g.; formation of frost), however some scholars will also refer to this process as sublimation.

1

1

The general molecular formula for phenol is C6H5OH. It is an aromatic organic compound with a hydroxyl group bonded to a carbon atom of a cyclic structure. The ring structure has alternate double and single bonds. The formula of phenol is C6H5OH. Benzene has the formula C6H6. It is a hexagonal ring of six carbon atoms bonded with alternate single and double bonds. Each carbon atom in benzene has a bond with a hydrogen atom. In phenol, a hydroxyl group replaces one of the hydrogen atoms.

The reaction of CuCl2, HNO3, and AgNO3 is a redox reaction. In a redox reaction, one substance loses electrons and is oxidized, while another substance gains electrons and is reduced. In this reaction, CuCl2 is oxidized to Cu2+, HNO3 is reduced to NO, and AgNO3 is reduced to Ag.

The balanced equation for the reaction is:

CuCl2 + 2HNO3 + 2AgNO3 → Cu2+ + 2NO + 2AgCl

The products of the reaction are copper(II) ions, nitrogen monoxide gas, and silver chloride precipitate.

Here are some of the properties of phenol:

Phenol is a white crystalline solid that is soluble in water.

Phenol has a strong, characteristic odor.

Phenol is a mild acid.

Phenol is toxic and can cause burns to the skin and eyes.

Phenol is used in a variety of products, including disinfectants, antiseptics, and plastics.

The molarity of the solution prepared by dissolving 0.355 moles of NH₃ in enough water to make 3.84 L of solution is 0.092 M

First, we shall list out the given parameters from the question. This is given below:

Molarity of a solution is defined as mole per unit volume i.e

Molarity of solution = mole / volume

Inputting the various parameters, we have:

Molarity of solution = 0.355 / 3.84

Molarity of solution = 0.092 M

Thus, from the above calculation, it is evident that the molarity of the solution is 0.092 M

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Answer:

C. increase crop yields

Explanation:

Genetically modified organisms are those organisms that have been improved using genetic engineering procedures. Genetic engineering/modification is the manipulation of an organism's genome in order to get an improved organism with desirable traits.

The organisms being genetically modified or engineered is called GMO or transgenic organisms. Hence, in this case, one feature of the crops being genetically modified is to have an INCREASED YIELD.

Explanation:

Depositional landforms are the visible evidence of processes that have deposited sediments or rocks after they were transported by flowing ice or water, wind or gravity. Examples include beaches, deltas, glacial moraines, sand dunes and salt domes.

hope it helps!

Answer:

Following are the solution to these question:

Explanation:

Calculating the mean:

\(\bar{x}=\frac{175+104+164+193+131+189+155+133+151+176}{10}\\\\\)

  \(=\frac{1571}{10}\\\\=157.1\)

Calculating the standardn:

\(\sigma=\sqrt{\frac{\Sigma(x_i-\bar{x})^2}{n-1}}\\\\\)

Please find the correct equation in the attached file.

\(=28.195\)

For point a:

\(=3s+yblank \\\\=3 \times 28.195+50\\\\=84.585+50\\\\=134.585\\\)

For point b:

\(=3 \ \frac{s}{m}\\\\ = \frac{(3 \times 28.195)}{1.75 \times 10^9 \ M^{-1}}\\\\= 4.833 \times 10^{-8} \ M\)

For point c:

\(= 10 \frac{s}{m} \\\\= \frac{(10 \times 28.195)}{1.75 x 10^9 \ M^{-1}}\\\\ = 1.611 \times 10^{-7}\ M\)

It is calculated by using the slope value that is \(1.75 \times 10^9 M^{-1}\). The slope value \(1.75 \times 10^9 M^{-1}\)is ambiguous.

The standard enthalpy change of reaction for the given reaction is -46.9 kJ/mol. Since the enthalpy change is negative, it indicates that the reaction is exothermic and releases energy in the form of heat.

What is Enthalpy?

Enthalpy (H) is a thermodynamic property that describes the total heat content of a system at constant pressure. It is a measure of the internal energy of a system, which includes the energy required to create or destroy the system as well as the energy required to maintain its temperature and pressure.

The standard enthalpy change of reaction (ΔHr0) can be determined using the standard enthalpies of formation (ΔHf0) of the reactants and products.

2HCl(aq) + Ca(OH)2(s) → CaCl2(s) + 2H2O(l)

The standard enthalpy change of reaction can be calculated using the following equation:

ΔHr0 = Σ(nΔHf0(products)) - Σ(nΔHf0(reactants))

ΔHf0(HCl(aq)) = -167.2 kJ/mol

ΔHf0(Ca(OH)2(s)) = -986.1 kJ/mol

ΔHf0(CaCl2(s)) = -795.8 kJ/mol

ΔHf0(H2O(l)) = -285.8 kJ/mol

Substituting the values into the equation, we get:

ΔHr0 = [2(ΔHf0(H2O(l))) + ΔHf0(CaCl2(s))] - [2(ΔHf0(HCl(aq))) + ΔHf0(Ca(OH)2(s))]

ΔHr0 = [2(-285.8 kJ/mol) + (-795.8 kJ/mol)] - [2(-167.2 kJ/mol) + (-986.1 kJ/mol)]

ΔHr0 = (-571.6 kJ/mol - 795.8 kJ/mol) - (-334.4 kJ/mol - 986.1 kJ/mol)

ΔHr0 = -1367.4 kJ/mol + 1320.5 kJ/mol

ΔHr0 = -46.9 kJ/mol

Therefore, the standard enthalpy change of reaction for the given reaction is -46.9 kJ/mol. Since the enthalpy change is negative, it indicates that the reaction is exothermic and releases energy in the form of heat.

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Answer:

Tangible

Explanation:

Tangible alone means it is "perceptible by touch," meaning you physically observe the object with your sense of touch.

Having tangible motivation is like working for money or a trophy.

Considering the ideal gas law, the volume occupied by 3.25 moles of an ideal gas at a temperature of 18.00°C is 686.71 L.

An ideal gas is the behavior of those gases whose molecules do not interact with each other and move randomly. Under normal conditions and under standard conditions, most gases exhibit ideal gas behavior.

An ideal gas is characterized by three state variables: absolute pressure (P), volume (V), and absolute temperature (T), related by a simple formula called the ideal gas law:

P×V = n×R×T

Where:

In this case, you know:

Replacing in the ideal gas law:

1.13 atm×V = 3.25 mol× 0.8205 L.atm/K.mol× 291 K

Solving:

V = (3.25 mol× 0.8205 L.atm/K.mol× 291 K)÷ 1.13 atm

V= 686.71 L

Finally, the volume is 686.71 L.

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Answer:

D

Explanation:

Because, it is lol

Answer: D.

Explanation:

Asexual reproduction requires only one parent, making it more efficient and take a shorter amount of time than sexual reproduction.

The mass concentration of Sodium ethanedioate is 82 g/dm^3 while its molar concentration is 0.6125 M.

The term redox reaction refers to a reaction that involves the loss/gain of electrons. The redox reaction here is shown as;

2MnO4^-(aq) + 5C2O4^2- (aq) + 16H^+ ---->2Mn^2+(aq) + 10CO2(g) + 8H2O(l)

Number of moles of permanganate = 0.05 * 24.50/1000 = 1.225 * 10^-3 moles

2 moles of permanganate reacts with 5 moles of ethanedioate

1.225 * 10^-3 moles of permanganate reacts with 1.225 * 10^-3 moles *  5 moles /2 moles = 3.1  * 10^-3 moles

Since concentration = number of moles / volume

concentration of ethanedioate = 3.1  * 10^-3 moles/ 5.00 * 10^-3

= 0.6125 M

Mass concentration = molar concentration * molar mass = 0.6125 M * 134 g/mol = 82 g/dm^3

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Answer:

The 3rd one " C " because it surrounds the nucleus it's not known the inside

An electron is found in the space surrounding the nucleus.

An electron is a sub-atomic particle which is found in the extra-nuclear part of an atom. They are found revolving int the shells which surround the nucleus.It carries a negative charge of  minus 1 .

They are the elementary particles as they do not  have known components or structure. It has a mass which is approximately equal 1/1836 th that of proton.No two electrons can occupy the same  quantum state according to the Pauli exclusion principle.

As all elementary particles, it too does possess both particle and wave characteristics. They can collide with each other and cause diffraction . Wave properties of electrons are easier to observe  with aid of experiments, because of lower mass and longer de Broglie wavelength.

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Answer:

im gonna say b

Explanation:

Answer:

\(V_2 = 0.0167L = 16.7 mL\)

Explanation:

\(c_1 V_1 = c_2 V_2\\2.0 M \cdot 0.100L = 12M \cdot V_2\\V_2 = \frac{2.0M \cdot 0.100L}{12M} = 0.0167L = 16.7 mL\)

The concentration of the HNO₃ solution needed to neutralize the 27.60 mL of 1.00 M NaOH is 2.76 M

The balanced equtaion is given below:

HNO₃ + NaOH —> H₂O + NaNO₃

Now, we shall obtain the concentration of the HNO₃ solution needed for the neutralization reaction. This is shown below:

CaVa / CbVb = nA / nB

(Ca × 10) / (1 × 27.6) = 1

(Ca × 10) / 27.6 = 1

Cross multiply

Ca × 10 = 27.6

Divide both side by 10

Ca = 27.6 / 10

Ca = 2.76 M

Thus, the concentration of the HNO₃ solution needed is 2.76 M

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The balanced reaction is shown as ;\(2H_{2} O + 2OH^- + 2CoCl_{2} +Na_{2} O_{2} ---- > 2CoCl_{3} + 4Cl^- + 2Na^+\)

We know that a redox reaction is a kind of reaction where one specie is oxidized while the other specie is reduced in the reaction. In this case, we are trying to see how to balance the reaction that is shown under basic conditions.

We know that under basic conditions, we would have to add the hydroxide ions and water so that we can be able to balance the reaction as shown. We would now have; \(2H_{2} O + 2OH^- + 2CoCl_{2} +Na_{2} O_{2} ---- > 2CoCl_{3} + 4Cl^- + 2Na^+\). Thus the reaction is balanced under basic conditions.

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Answer:

1) No, 2) Yes, 3) Yes

Explanation:

Refer to solubility rules to understand if a precipitate occurs between a mix of solutions.

Two solutions form a precipitate if they react to yield an insoluble product.

Let us now consider each of the reacting species one after the other.

In the first case;

Zn(NO3)2(aq) + FeI2(aq) ----> ZnI2(aq) + Fe(NO3)2(aq)

The two products of the reaction are soluble so no precipitate is formed.

In the second case;

2KBr(aq) + Pb(NO3)2(aq) ------>  2KNO3(aq) + PbBr2(s)

An insoluble product PbBr2 is formed hence a precipitate is formed.

In the third case;

NH4Br(aq) + NaOH(aq) -------> NH4OH(aq) + NaBr(aq)

No insoluble product is formed so the there is no precipitate.

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Answer:

Option A, 931 Kg

Explanation:

As we know that weight is equal to the product of mass and acceleration due to gravity.

Thus,

\(W = M * 9.8\) m/s2

Substituting the given values in above equation, we get -

\(W = 95 * 9.8 \\W = 931\)Kg

Hence, option A is correct

Answer:

As Earth rotates on its axis, the different locations on Earth change position in relation to the Sun. A city on Earth that faces toward the Sun at noon will rotate to face away from the Sun 12 hours later. The positions of Earth and the Sun over the course of a 24-hour rotation cause sunrise, sunset, day, and night.

Answer:

The Earth's rotation affects the direction sunlight rises and sets by the Earth's rotation on its axis.

Explanation:

It makes one complete turn every 24 hours. it turns towards east. As the Earth rotates toward east, it looks like the sun is moving west.

Answer:

its false

Explanation:

srry if its wrong ;-;

Sry I'm a minor and do not have the amount of brain cells to compute this equation. :')

The total number of moles of reactants and products in the chemical reaction given is 9 moles

The total number of mole of reactants and products in the chemical reaction can be obtained as follow:

2H₂S + 3O₂ -> 2H₂O + 2SO₂

The following were obtained from the above equation:

Total number of mole = Mole of reactants + mole of products

Total number of mole = 5 mole + 4 moles

Total number of mole = 9 moles

Thus, we can say that the total number of mole is 9 moles

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Answer:

1. 179.2 L

2. 303.62 g

Explanation:

1. Determination of volume of H₂O (g).

We'll begin by calculating the number of mole in 144 g of H₂O. This is illustrated below:

Mass of H₂O = 144 g

Molar mass of H₂O = (2×1) + 16 = 2 + 16 = 18 g/mol

Mole of H₂O =?

Mole = mass /Molar mass

Mole of H₂O = 144/18

Mole of H₂O = 8 moles

Finally, we shall determine volume of H₂O (g) as follow:

1 mole of any gas occupy 22.4L at stp.

Therefore, 8 moles of H₂O (g) will occupy =

8 × 22.4 = 179.2 L

Thus, 144 g of H₂O (g) occupies 179.2 L

2. Determination of the mass of H₂O₂ (g).

We'll begin by calculating the number of mole of H₂O₂ (g) that occupied 200 L at STP. this can be obtained as follow:

1 mole of any gas occupy 22.4 L at stp.

Therefore, Xmol of H₂O₂ (g) will occupy 200 L at STP i.e

Xmol of H₂O₂ (g) = 200/22.4

Xmol of H₂O₂ (g) = 8.93 moles

Thus, 8.93 moles of H₂O₂ (g) occupied 200 L at STP.

Finally, we shall determine the mass of H₂O₂ (g) as follow:

Mole of H₂O₂ (g) = 8.93 moles

Molar mass of H₂O₂ = (2×1) + (2×16) = 2 + 32 = 34 g/mol

Mass of H₂O₂ =?

Mole = mass /Molar mass

8.93 = mass of H₂O₂ /34

Cross multiply

Mass of H₂O₂ = 8.93 × 34

Mass of H₂O₂ = 303.62 g

Some examples of safer but more expensive disinfectants include hydrogen peroxide, quaternary ammonium compounds, electrolyzed water, and ultraviolet light.

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Answer: pH=-log[H+]

pH=-log(2.5x10^-4)

pH=3.6

Explanation: