Dark surfaces such as the black paper Response area more light and Response area than the lighter surfaces such as yellow or pink paper. A simple experiment that you could try is to place two bottles out in the sun. Place the black paper under one bottle and white paper under the other. After a few minutes, measure the temperature of the water in each bottle. The glass with the Response area paper on it should be hotter than the other bottle. Lighter surfaces Response area more light, that is why people wear lighter colored clothes in the Response area.

Answer:

it has 17 electrons

Explanation:

seventeen el...

The new volume will be 7.65 litres

It is given that

Initial volume of sample = V1 = 1.53L

Initial pressure of sample = P1 = 5.00atm

Final pressure of sample = P2 = 1.00atm

Final volume of sample = ?

There exists a relationship between pressure and volume through Boyle's Law. It states that when temperature is held constant in thermodynamic syatems, the volume increases as the pressure decreases (and is true the other way around).

It can be expressed as P1V1 = P2V2 where P1 is first pressure, V1 is first volume, P2 is second pressure, and V2 is second volume

P1V1 = P2V2

5 x 1.53 = 1 x V2

V2 = 7.65 litres

Hence, new volume will be 7.65 litres

Learn more about Boyle's law here:

https://brainly.com/question/26040104

#SPJ13

Answer:

The Atomic Number of an element is always equal to the Number of protons. The mass Number of an element is equal to the Protons added to the Neutrons. The element Sodium has an atomic Number of 11, and an average at

The element Sodium has an atomic number of 11 and an average atomic mass of 22.98 which makes the mass number 23.

Therefore

An atomic number of 11 means this atom will have 11 protons.

A mass number of 23 means 23 - 11 this atom will have 12 neutrons.

Since this atom is neutral the positive protons must be equal to the negative electrons. This atom will have 11 electrons.

Protons 11

Neutrons 12

Electrons 11

Answer:

election

Explanation:

The broadcast wavelength of the radio station 100.7 FM is 2.979 m

The frequency and wavelength of a wave are related according to the following equation

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

v = λf

With the above formula, we can obtain the wavelength. Details below.

From the question given above, the following data were obatained:

We can obtain the wavelength as follow:

v = λf

3×10⁸ = λ × 100.7×10⁶

Divide both sides by 100.7×10⁶

λ = 3×10⁸ / 100.7×10⁶

λ = 2.979 m

Thus, the wavelength of the radio station is 2.979 m

Learn more about wave:

https://brainly.com/question/14630790

#SPJ1

The equilibrium constant at this temperature is Kc= 4.17 x 10⁻⁶.

Since the equilibrium constant depends on the equilibrium concentration of both the reactants and the products of the chemical reaction.

Balanced reaction equation

2CH₄(g)⇌C₂H₂(g)+3H₂(g)

The initial concentration of the CH₄ = 0.093 M

The equilibrium concentration of the H = 0.017 M

Equilibrium constant = ?

Let's make the ice table

2CH₄(g) ⇌ C₂H₂(g) + 3H₂(g)

0.093 M 0 0

-2x +x +3x

0.093-2x x 0.017 M

3x = 0.017 M

Therefore, x =0.017 M /3 = 0.00567 M

Therefore, the equilibrium concentration of CH₄ =

0.093 M – 2x = 0.093 M – (2 x 0.00567 M) = 0.0817 M

Equilibrium concentration of the C₂H₄ = x = 0.00567 M

Let's write the equilibrium constant expression

Kc= [C₂H₄[H2]³/[CH₄]²

Let's put the values in the formula

Kc= [0.00567][0.017]³/[0.0817]²

Kc= 4.17 x 10⁻⁶

Therefore, the equilibrium constant is 4.17 x 10⁻⁶.

To learn more about equilibrium constant, refer to the link:

https://brainly.com/question/12971169

#SPJ9

The excess reactant would be H2 by 6.8 g.

N2 and H2 react according to the following balanced equation:

\(N_2 +3H_2 --->2 NH_3\)

The mole ratio of N2 and H2 is 1:3. For every 1 mole of N2. 3 moles of H2 would be needed for complete reaction.

If, mole = mass/molar mass

mole of 15.0 g of N2 = 15/28

                                     = 0.536 moles

Mole of 10.0 g of H2 = 10/2

                                  = 5 moles

Stoichiometrically, the mole of H2 required for 0.536 mole of N2 should be:

                                0.536 x 3 = 1.6 moles.

Thus, the excess mole of H2 would be:

                 5 - 1.6 = 3.4 moles

Mass of excess moles of H2 = 3.4 x 2

                                                = 6.8 g.

More on calculating moles can be found here: https://brainly.com/question/21085277

Answer:

D. double displacement reaction

Socraticorg

Answer:1.29atm

Explanation: We are given P2,V1,V2,T1, and T2. We are looking for P1.

We can plug it into the combined gas laws formula.

P1 = ?

V1 = 5.31 L

T1 = 371 K

P2 = 1.03 atm

V2 = 4.90 L

T2 = 273 K

\(P1 = \frac{(1.03)(371)(4.90)}{(273)(5.31)} \\\)

P1 = 1.29 atm

The rate of the formation of nitrogen dioxide can be obtained as 0.800 mol/L. Option D

The rate of reaction depends on various factors, including the nature of the reactants, the concentrations of the reactants, the temperature, the presence of catalysts, and the surface area of the reactants. It is determined by the collision of particles and their energy, orientation, and the effectiveness of the collision in breaking and forming chemical bonds.

We have that;

1/4d[\(O_{2}\)]/dt = d[\(NO_{2}\)]/dt

Thus;

Rate of formation of the nitrogen dioxide = 2 * 0.200 mol/L

= 0.800 mol/L

Learn more about rate of reaction:https://brainly.com/question/30546888

#SPJ1

Although the data for the experiment was not provided, we can offer a generalized answer in that when performing an experiment to achieve absolute zero temperatures, the value will never match the exact value.

Absolute zero is the lower limit of temperature. It is considered the coldest possible temperature that can exist. However, any attempt to reach this temperature in a controlled environment has failed, scientists do not think it is possible to recreate this temperature.

Therefore, we can confirm that the value of the absolute zero experiments did not match the accepted value. If the hypothesis was that it would be difficult or impossible to achieve, then the data would support the hypothesis, otherwise, it would fail to do so.

In summary, absolute zero is a temperature that cannot be recreated in a lab, so the value in this experiment does not match the accepted value and there is no further exploration to be done on this matter.

To learn more about absolute zero visit:

https://brainly.com/question/79835?referrer=searchResults

Answer:

2.25g of NaF are needed to prepare the buffer of pH = 3.2

Explanation:

The mixture of a weak acid (HF) with its conjugate base (NaF), produce a buffer. To find the pH of a buffer we must use H-H equation:

pH = pKa + log [A-] / [HA]

Where pH is the pH of the buffer that you want = 3.2, pKa is the pKa of HF = 3.17, and [] could be taken as the moles of A-, the conjugate base (NaF) and the weak acid, HA, (HF).

The moles of HF are:

500mL = 0.500L * (0.100mol/L) = 0.0500 moles HF

Replacing:

3.2 = 3.17 + log [A-] / [0.0500moles]

0.03 = log [A-] / [0.0500moles]

1.017152 = [A-] / [0.0500moles]

[A-] = 0.0500mol * 1.017152

[A-] = 0.0536 moles NaF

The mass could be obtained using the molar mass of NaF (41.99g/mol):

0.0536 moles NaF * (41.99g/mol) =

The proximity of unsaturated groups (C=C, C=O, aromatic) and electronegative atoms (O, N, halogen) has an impact on the proton NMR chemical shift. Electronegative groups shift to the left (down field; ppm rise).

The chemical shift in nuclear magnetic resonance (NMR) spectroscopy refers to the atomic nucleus' resonant frequency in relation to a standard in a magnetic field. The location and quantity of chemical changes frequently serve as diagnostic indicators of molecular structure.

You take into account the chemically non-equivalent proton(s) one at a time while making chemical shift predictions. Find the origin of each proton or proton pair that is not chemically comparable. Whether the proton(s) is/are linked to a methyl, methene, or methine determines the beginning point.

learn more about nuclear magnetic resonance

https://brainly.com/question/21024524

#SPJ1

Ammonia (\(NH_3\)) and ammonium chloride (\(NH_4Cl\)) mixture could be a useful buffer in a solution. Option C

A buffer is a solution that can resist changes in pH when small amounts of acid or base are added. It consists of a weak acid and its conjugate base or a weak base and its conjugate acid. The buffer system works by the principle of Le Chatelier's principle, where the equilibrium is shifted to counteract the changes caused by the addition of an acid or a base.

In option A, acetic acid (\(CH_3CO_2H\)) is a weak acid, but hydrochloric acid (HCl) is a strong acid. This combination does not form a buffer because HCl is completely dissociated in water and cannot provide a significant concentration of its conjugate base.

Option B consists of sodium hydroxide (NaOH), which is a strong base, and elemental sodium (Na), which is a metal. This combination does not form a buffer as there is no weak acid-base pair involved.

Option D contains acetic acid (\(CH_3CO_2H\)), a weak acid, and ammonia (\(NH_3\)), a weak base. Although they are weak acid and base, they do not form a buffer system together as they are both weak acids or bases and lack the required conjugate acid-base pair.

Option C, ammonia (\(NH_3\)), is a weak base, and ammonium chloride (\(NH_4Cl\)) is its conjugate acid. This combination can form a buffer system. When ammonia reacts with water, it forms ammonium ions (NH4+) and hydroxide ions (OH-).

The ammonium ions act as the weak acid, while the ammonia acts as the weak base. The addition of a small amount of acid will be counteracted by the ammonium ions, and the addition of a small amount of base will be counteracted by the ammonia, thus maintaining the pH of the solution relatively stable.

Therefore, option C, consisting of ammonia (\(NH_3\)) and ammonium chloride (\(NH_4Cl\)), is the suitable mixture that could be a useful buffer in a solution.

For more such question on buffer visit:

https://brainly.com/question/13076037

#SPJ8

There are two modes in which unstable nuclei of radioactive elements may decay. They are by α - emission or by β - emission. Among the given options, the α - emission is ₆₄¹⁴⁸Gd → ₆₂¹⁴⁴Sm + ₂⁴He. The correct option is D.

According to the theory of radioactive disintegration, the atoms of all the radioactive elements undergo spontaneous disintegration with the emission of α or β particles to yield atoms of new elements. When a radionuclide decays by emitting an  α - particle, it is called α - decay.

When a radionuclide undergoes  α - emission, i.e. a helium nucleus there occurs a decrease of 2 units in the atomic number and a decrease of 4 units in the mass number. The new nuclide produced has an atomic number 2 units less and a mass number 4 units less than the parent.

₆₄¹⁴⁸Gd → ₆₂¹⁴⁴Sm + ₂⁴He represents α - emission.

Thus the correct option is D.

To know more about α - emission, visit;

https://brainly.com/question/14921881

#SPJ7

Answer:

phosphoric

Explanation:

pls mark me as brainliest

Answer:

hydrochloric acid is a substance that is a binary acid .

Answer:

The law of conservation of mass is crucial to balancing equations because the law states that mass in an isolated system cannot be created nor destroyed. Therefore, it's related to balancing equations because you cannot add more moles of an element or compound to the product side without adding it to the reactant side. Everything on one side of the equation MUST be present on the other side.

Answer:

C)Grassland biomes contain mostly grasses.

Explanation:

The main differences between a savanna biome and a grassland is that grasslands biomes contain mostly grasses.

Savanna are made up of both grasses and shrubs.

I wrote it down for you these are 100% right answer i hope it helped.

Answer:

mixture

Explanation:

Physical separation techniques, such as filtration, can be used to separate mixtures into their component parts. As a result, mixture separation is less difficult than chemical compound separation. Therefore, option B is correct.

A substance made up of two or more separate chemical compounds that are not chemically linked is referred to as a mixture. A mixture is the actual coming together of two or more substances while maintaining their individual identities.

Because they are not chemically linked to one another, the components of a mixture are extremely simple to separate. We'll examine five various techniques for separating mixtures: Filtration. Crystallization.

A mixture's constituent parts are distinguished from one another by differences in their physical characteristics, such as particle size. The separation of the compounds is made easier by how varied their properties are. Tea leaves can be filtered using a strainer because they do not dissolve in water.

Thus, option B is correct.

To learn more about the mixture, follow the link;

https://brainly.com/question/24898889

#SPJ2

Answer:

Explanation:

Nuclear Fission

Nuclear fission, subdivision of a heavy atomic nucleus, such as that of uranium or plutonium, into two fragments of roughly equal mass. The process is accompanied by the release of a large amount of energy. In nuclear fission the nucleus of an atom breaks up into two lighter nuclei.

Nuclear fission is a process where the nucleus of an atom is split into two or more smaller nuclei, known as fission products. The fission of heavy elements is an exothermic reaction, and huge amounts of energy are released in the process.

Given,

\(V = 5.2 L\\\\M = 1.1 KOH\\\\V_2 = 2.3 L\\\\M_2 = 0.2 Sc(OH)_3\)

moles of each substance,

moles of base = \(M*V = 5.2L * 1.1M = 5.72 moles of KOH\)

mole of \(Sc(OH)_3 = M*V = 2.3*0.2 = 0.46 moles of Sc(OH)_3\)

Assume

\(Sc(OH)3 ---> Sc+3 and 3OH-\)

therefore,

there is 3x the amount of moles of \(Sc(OH)_3\) per mol of \(OH-\)

\(0.46 * 3 = 1.38 mol of OH-\)

Adding all OH- moles

\(1.38+5.72 = 7.1 mol of OH- present\)

The total volume:

\(V_T = V_1+V_2 = 5.2+2.3 = 7.5 L\)

The concentration of  ions

\([OH-] = \frac{mol OH}{V}= \frac{7.1}{7.5} = 0.94667\)

\(pOH = -log(OH-) = -log(0.94667) = 0.0238\)

Therefore,

\(pH = 14 - pOH\\\\pH = 14 - 0.0238 = 13.97\)

For more information on pH of mixtures, visit

https://brainly.com/question/23659500?referrer=searchResults

Answer:

your answer should be B.273 K

Explanation:

Statement a is true, as the melting points of saturated fatty acids do increase with increasing chain length. Statement b is false, as saturated fatty acids do not contain double bonds. Statement c is false, as △9, 12-all cis, 18:3 represents alpha-linolenic acid, not linoleic acid. Statement d is true, as glycerol is indeed a by-product of the hydrolysis of fats.

a. True. The melting points of saturated fatty acids increase with increasing chain length. This is because longer fatty acid chains have stronger intermolecular forces, such as van der Waals forces, which require more energy to break and result in higher melting points.

b. False. Saturated fatty acids do not have double bonds. They are composed of only single carbon-carbon bonds. Double bonds are found in unsaturated fatty acids.

c. False. △9, 12-all cis, 18:3 is not linoleic acid. It represents the structure of alpha-linolenic acid. Linoleic acid is △9, 12-18:2, which means it has two double bonds located at the 9th and 12th carbon positions.

d. True. A by-product of the hydrolysis of fats is glycerol. When fats undergo hydrolysis, they are broken down into their constituent fatty acids and glycerol. Glycerol is a three-carbon molecule that is a component of triglycerides (fats).

During hydrolysis, the ester bonds between the fatty acids and glycerol are cleaved, resulting in the release of fatty acids and glycerol.

For more such question on double bonds visit:

https://brainly.com/question/27879143

#SPJ8

The right response is B. 103.5 g. The mole ratio of sodium to chloride is 1:1 according to the equation Na+ + Cl NaCl. Since 4.5 moles of chloride are provided, the equation requires 4.5 moles of sodium to be balanced. We must utilise the molar mass of sodium, which is 22.99 g/mol, to get the mass of sodium.

We obtain 103.5 g of sodium by multiplying 4.5 moles of sodium by 22.99 g/mol. The correct response is B. 103.5 g.

The equation requires 1 mole of sodium for every mole of chloride, giving 4.5 moles of sodium and 103.5 g.

Learn more about  NaCl at:

https://brainly.com/question/18385870

#SPJ1

Answer:

Water has strong hydrogen bond dipole-dipole intermolecular forces that give water a high surface tension and a high heat of vaporization and that make it a strong solvent.

Explanation:

Answer:

D. no definite shape or. definite volume

Explanation:

Gases do not have a definite shape or volume because the molecules in gases are very loosely packed, they have large intermolecular spaces and hence they move around. The particles of solid are closely packed and occupy less space while particles of gases are loosely packed and occupy the complete space available.