The pungency of chillies is due to ____________.​

The mean of the data set is approximately 4.0626, and the 90% confidence interval is [4.060925, 4.064275].

The sample mean (x) is calculated as follows:

x = (4.0620 + 4.0550 + 4.0650 + 4.0740 + 4.0550 + 4.0660) / 6

x ≈ 4.0626 (rounded to four decimal places)

The 90% confidence interval is calculated as follows;

Standard deviation (s):

(4.0620 - 4.0626)² = 0.00000036

(4.0550 - 4.0626)² = 0.00000576

(4.0650 - 4.0626)² = 0.00000006

(4.0740 - 4.0626)² = 0.00001328

(4.0550 - 4.0626)² = 0.00000576

(4.0660 - 4.0626)² = 0.00000012

average of the squared differences:

(0.00000036 + 0.00000576 + 0.00000006 + 0.00001328 + 0.00000576 + 0.00000012) / 6 ≈ 0.00000624

s = √(0.00000624)

s ≈ 0.002496

the standard error of the mean (SEM):

SEM = 0.002496 / √6

SEM ≈ 0.001018

For a 90% confidence interval, the z value is approximately 1.645.

ME = 1.645 * 0.001018 ≈ 0.001675

CI = x ± ME

CI = 4.0626 ± 0.001675

CI ≈ [4.060925, 4.064275]

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Answer:

solids, liquids, gases

ANSWER

STEP-BY-STEP EXPLANATION:

You are given the below expression from the question provided

Answer:

Energy added to solid water will turn it into liquid water; add energy into liquid water and it will be turned into water vapor.

Explanation:

Adding energy is basically adding heat; the more heat, the more excited the molecules of H2O gets. In solid water, the molecules aren't really moving because they don't have a lot of energy, so it is solid. In liquid water (which is water in room temperature), it has a medium amount of energy; the molecules aren't stuck together but it isn't completely dispersed, so it is in liquid form. However, in water vapor, the energy becomes very high and the molecules are excited. The hydrogen bonds holding the molecules together break and the water is released as a vapor.

Answer:

Sedimentary

Explanation:

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:

Isotopes are variants of an element, where the number of neutrons is different but its number of protons stay the same.

Explanation:

If the number of protons had changed then it would just be a different element.

Electron number changing simply adds charge to the atom, and doesn't change it or anything.

PLS GIVE BRAINLIEST

Answer:

Isotopes are one of two or more forms of the same chemical element.

Explanation:

Different isotopes of an element have the same number of protons in the nucleus, giving them the same atomic number,but a different number of neutrons giving each element isotope of a different atomic weight.

Answer:I'm going to give some fictitious values just so that we can get some perspective on the matter.

Let's say that the surface temperature of our sun is 10, the surface temp of the bigger star- the red giant formed from leaving the main sequence, has a temp of 0.2. of that- 2.

We can also say that the radius of our sun is 10, and the radius of the red giant is 1000. (100 times more)

Using the equation:

L

=

σ

A

T

4

σ

= The Stefan-Boltzmann constant =

5.67

×

10

−

8

But we can ignore the constant, as we are only interested in a ratio of these values.

L

S

u

n

=

4

π

(

10

)

2

×

10

4

=

1.26

×

10

7

L

S

t

a

r

=

4

π

(

1000

)

2

×

2

4

≈

2.01

×

10

8

2.01

×

10

8

1.26

×

10

8

≈

16

So the newly formed, red giant star is almost 16 times more luminous than the sun. This is owing to the increased surface area of the star due to the massively increased radius.

A small sidenote:

There is an equation that might be useful for comparing the radii, temperature and luminosity of main sequence stars. As red giants are not on the main sequence it could not be used here, but if you stumble across a question where they ask you to find the radius, luminosity or temperature given the other two, you can relate it to the sun's characteristics:

r

s

t

a

r

r

s

u

n

=

√

L

s

t

a

r

L

s

u

n

×

(

T

s

u

n

T

s

t

a

r

)

2

(I know, it's not a beauty to look at- but it works)

Where

X

s

u

n

is the radius, temperature, and luminosity of the sun. These are not often given in numerical values, but this equation serves well when asked to find e.g the radius of a star, in solar radii given that a star is twice as luminous and has 5 times the temperature of that of the sun.

Hence:

T

s

t

a

r

=

5

T

s

u

n

L

s

t

a

r

=

2

L

s

u

n

r

s

t

a

r

r

s

u

n

=

√

2

L

s

u

n

L

s

u

n

×

(

T

s

u

n

5

T

s

u

n

)

2

(cancel the common terms)

r

s

t

a

r

r

s

u

n

=

√

2

×

(

1

5

)

2

r

s

t

a

r

≈

0.057

r

s

u

n

(divide both sides by 0.0057)

17.5

r

s

t

a

r

≈

r

s

u

n

So the star's radius is almost 17.5 times that of the sun.

Hopefully, you find this info useful!

Explanation:

Ph 2 will ahve more strength due to the fact that its more acidic compared to pH 5.

the lower the number of a pH, the more it is heading towards being acidic, but the higher the number, the more it heads towards being an alkali. here is a ppt i made along time ago. hope it can help you . have a nice day

Answer:

OsBr2.

Explanation:

Osmium decobromide is the same as osmium bromide. This is the result of the reaction between osmium hydroxide (Os(OH)2) and hydrobromic acid (HBr) to form water and a salt (osmium bromide):

So, osmium bromide has the formula: OsBr2.

The volume of the gas in the tank at 293K and 3.0 atm pressure is 248 L. Hence, option B is correct.

Given:

T1 = 473K

T2 = 293K

P1 = 0.92 atm

P2 = 3.0 atm

The ideal gas law equation is:

PV = nRT

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

n1 = (PV)/(RT)

= (0.92 atm × 500.0 L)/(0.0821 Latm/molK × 473K)

= 10.42 mol

Use the ideal gas law again to find the final volume of the gas in the tank under high pressure:

V2 = (n1 × R × T2)/P2

= (10.42 mol × 0.0821 Latm/molK × 293K)/(3.0 atm)

= 248 L

Therefore, the volume of the gas in the tank at 293K and 3.0 atm pressure is 248 L.

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Answer:

Using the ideal gas law, PV=nRT, where P is pressure, V is volume, n is the number of moles, R is the gas constant, and T is temperature in Kelvin, we can solve for n:

n = PV/RT

We know that the initial volume is 500.0 L, pressure is 0.92 atm, and temperature is 473K. We can use this information to find the initial number of moles:

n1 = (0.92 atm x 500.0 L)/(0.08206 L atm/mol K x 473K) = 11.80 mol

Next, we can use the ideal gas law again to find the final volume. We know that the final pressure is 3.0 atm and the final temperature is 293K:

V2 = nRT2/P2

V2 = (11.80 mol x 0.08206 L atm/mol K x 293K)/3.0 atm = 95 L

Therefore, the volume of the gas at the lower temperature and higher pressure is approximately 95 L. Answer: 95 L.

1) If the temperature of the system increases, the equilibrium constant k decreases.

2) the concentration of H₂ increases.

The reaction is given as :

CO +  2H₂   ⇄  CH₃OH                          ΔH = -91.8 KJ ( exothermic reaction)

1) Temperature is the only factor that changes the equilibrium constant for the given reaction. As temperature increases equilibrium constant decreases because the reaction is exothermic reaction.

                K = [ CH₃OH ] / [CO] [H₂]²

2) If the temperature increases the position of equilibrium moves to the left and concentration of H₂ increases.

Thus, 1) If the temperature of the system increases, the equilibrium constant k decreases.

2) the concentration of H₂ increases.

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The average speeds of gas molecules in cylinders A, B, C, and D are 0.03 m/s, 0.009 m/s, 0.1 m/s, and 1.5 m/s respectively. Cylinder A contains gas that is closest to absolute zero.

Absolute zero, often known as 0 kelvin, is the lowest point on the thermodynamic temperature scale, when the enthalpy as well as entropy of a cooled ideal gas reach their lowest values.

According to international treaty, absolute zero is defined as 273.15 degrees Celsius, which really is equivalent to 459.67 degrees Fahrenheit. The average speeds of gas molecules in cylinders A, B, C, and D are 0.03 m/s, 0.009 m/s, 0.1 m/s, and 1.5 m/s respectively. Cylinder A contains gas that is closest to absolute zero.

Therefore, Cylinder A contains gas that is closest to absolute zero.

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The partial pressure of each gas is the product of its mole fraction and total pressure. The partial pressure of carbon dioxide is 2.46 atm and the partial pressure of water vapor is 0.034.

Dalton's law of partial pressure states that the partial pressure of the component gases in a mixture is the product of its mole fraction and the total pressure.

Given that, number of moles of carbon dioxide = 0.197 moles.

number of moles of water vapor =0.00278 mole.

mole fraction of carbon dioxide = 0.197 / (0.197 + 0.00278) = 0.98

Total pressure = 2.50 atm

then partial pressure of carbon dioxide = 0.98 × 2.50 = 2.46 atm

Mole fraction of water vapor =  0.00278 / (0.197 + 0.00278) = 0.0139

partial pressure of water vapor = 0.0139 × 2.50 = 0.034 atm.

Therefore, the partial pressure of carbon dioxide and water vapor are 2.46 and 0.034 atm respectively.

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Answer:

8.8mol/l

Explanation:

but I'm not percent sure.

TT with Tt

or TT with TT

would give a tall plant

Answer:

A student performed titration to find the concentration of acetic acid. Titrant was sodium hydroxide. He went beyond the indicator color change by adding too much titrant.

Explanation:

hope it helps you

The term that refers to the passing of a wave through an object is "transmission."

Transmission refers to the process by which a wave passes through an object or medium. In the context of sound, transmission occurs when sound waves travel through different substances, such as air, water, or solids.

When a sound wave encounters an object, it can be transmitted through it, reflected off it, or absorbed by it, depending on the properties of the object and the medium through which the sound is traveling.

For example, when you speak into a microphone, the sound waves produced by your voice travel through the air and are transmitted to the microphone's diaphragm. The diaphragm converts the sound waves into electrical signals, which can then be amplified and reproduced as sound through speakers.

In summary, transmission is the term used to describe the passage of a wave, such as a sound wave, through an object or medium. It is an essential concept in understanding how waves interact with their surroundings and how sound propagates through different materials.

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Answer:

iron,oxygen,and water

Explanation:

I just learned this in chem today.

Answer:

I will find the different between the samples

To reduce the amount of leftover ingredients, we can modify the amount of starting ingredients. Here's how we can balance the equation using stoichiometry:

Given:

2 moles of water = 236 g + 236 g = 473 g

1 mole of sugar = 198 g

Let's assume we have x moles of sugar and y moles of water. The balanced equation would be:

x moles of sugar + y moles of water -> x moles of glucose + y moles of fructose

To minimize the amount of leftover ingredients, we need to find the ratio of moles of sugar to water that gives us the least amount of excess. We can use the mole-to-mass conversion factors to determine this ratio:

x moles of sugar * 198 g/mole = x * 198 g

y moles of water * 18 g/mole = y * 18 g

We need the ratio of x/y to be equal to 198/18 = 11. So, x = 11y.

By substituting x = 11y into the equation for x moles of sugar, we get:

x = 11y = 11 * y

x * 198 g = 11 * y * 198 g

x * 198 g / 11 = y * 198 g

x * 18 g = y * 198 g

x = y * 11

So, we need 11 moles of water for every 1 mole of sugar. This means that for every 198 g of sugar, we need 11 * 18 g = 198 g of water. This will minimize the amount of leftover ingredients.

About Mole

Mole comes from the word moles which means a certain amount of mass or in other water a small amount of mass. In chemistry, the mole is the unit for the amount of a substance. In the field of physics, mole has a standard definition as the amount of mass of a substance that contains as many particles as atoms contained in 12 grams of C-12.

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The reaction is spontaneous under conditions of low pressure and high temperature

We can say that a reaction is spontaneous when we know that the reaction is able to go on on its own. This implies that there is a mnimum energy that is required for the reaction to proceed.

The reaction is thus a sort of a self propagating system that goes on freely of its own accord.. We can see that what is going on here is the decomposition of the nitrogen V oxide gas as shown.

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Answer:

Tapeworms and roundworms both belong to the same phylum however, their families are different from one another.

Tapeworms are flat, segmented intestinal parasites of the cat and dog and humans sometimes. They are present in the intestines of pets and depend on them, therefore, are parasites. These parasites look like tape which gives it its name.

Roundworms can also infect humans and the most common cases are among children. When not treated immediately, they can cause severe damage to a human host and can even cause blindness. Tapeworms are white in color with a long, segmented body.

2.65g/ml is the density of a piece of granite whose volume is 20 mL and mass is 53grams. Density is the mass of a specific material per unit volume.

Density is the mass of a specific material per unit volume. Density is defined as d = M/V, in which d represents density, M is weight, as well as V is volume. Density is generally expressed in grams every cubic centimetre. Water, for example, has a density of 1 gram per square centimeter, but Earth has a density of 5.51 kilograms per cubic centimetre.

Density is sometimes measured in kilos per cubic centimeter (in metre-kilogram-second or SI units). The density of air, for example, is 1.2 kilos per cubic metre. 

density = mass / volume

            =53/ 20

            =2.65g/ml

Therefore, 2.65g/ml is the density of a piece of granite whose volume is 20 mL and mass is 53grams.

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Answer: do you want to become the best of friends well if you do all you have to do is say yes in the comments and ill give you the answer to your little problem here so all i want you to do is join this link tomorrow and come at 8:00 and zoom bomb my class this is the zoom link

join up tomorrow at 8:00 or just email me what's the link and i'll even give it to you but with an lambo like the one i have i have a brand spanking new Lamborghini 2021 aventador svj

Density is simply defined as the mass per unit volume of a substance. Mathematically, it is expressed as:

\(Density = \frac{mass}{volume }\)

To solve the question given above, we'll begin by calculating the volume of the metal. This can be obtained as follow:

Volume of water = 25 mL

Volume of water + metal = 46.5 mL

Volume of metal = (Volume of water + metal) – (Volume of water)

Volume of metal = 46.6 – 25

Finally, we shall determine the density of the metal. This can be obtained as follow:

Mass of metal = 254 g

Volume of metal = 21.5 mL

\(Density = \frac{mass}{volume }\\\\Density = \frac{254}{21.5} \\\)

Therefore, the density of the metal is 11.81 g/mL

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The equation that shows the formation of cobalt (III) ion from the neutral atom of cobalt is written as below:

\(\rm Cu \rightarrow Cu^{3+} + 3 e^{-}\)

Oxidation is the process of reaction with oxygen or donation of electrons to form the higher oxidation state. When a neutral atom donates one electron to other atom, it gains positive charge. Thus oxidizes to one higher oxidation state.

Cobalt is a transition metal exhibiting variable oxidation states as other transition metals. The possible oxidation states of cobalt are  +1, +2 and +3.

When cobalt atom donates 3 electrons from its valence shell. It forms the ion Co³⁺. The reaction can be represented as written above. The number of electrons donated is written in the right of the arrow.

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