Rudy wanted to assess the internal consistency of his measure of happiness so he measured reliability estimates by comparing items within his test. he reported a reliability estimate of 0.75. what measure of

Explanation:

(1) they are heterogenous mixture

(2) the size of particles of colloids is too small to be seen by bare eyes.

(3) they scatter light passing through them making it's path visible.

Answer:

Since it has 2 valence electrons

Explanation:

Answer:

B

Explanation:

Answer:

4NO + 6H2O = 4NH3 + 5O2

Explanation:

Think about it this way: there are 4N's 4O's and 12H's and 10O's on both sides that's what makes it balanced

Hope this helps :)

Answer:

V₂ = 33.32 L

Explanation:

Given data:

Initial volume = 27.7 L

Initial pressure = 70692 torr

Final pressure = 58775 torr

Final volume = ?

Solution:

The given problem will be solved through the Boyle's law,

"The volume of given amount of gas is inversely proportional to its pressure by keeping the temperature and number of moles constant"

Mathematical expression:

P₁V₁ = P₂V₂

P₁ = Initial pressure

V₁ = initial volume

P₂ = final pressure

V₂ = final volume  

Now we will put the values in formula,

P₁V₁ = P₂V₂

70692 torr × 27.7 L = 58775 torr × V₂

V₂ = 1958168.4 torr.L/ 58775 torr

V₂ = 33.32 L

Al is most reactive metal than Zn and Cu. Least reactive metal is Cu.

Cu +, Zn 2+, and Al 3+ have ionic radii of 77, 74 and 53.5 pm, respectively.

The electron configuration is the distribution of electrons of an atom or molecule in atomic or molecular orbitals. The electronic configurations of Cu +, Zn 2+, and Al 3+, on the other hand, are 3d 10 4s 1, 3d 10 4s 2, and 3d 10 4s 2 4p 1, respectively. Cu, Zn, and Al have electronegativities of 1.9, 1.65, and 1.61, respectively. The ionization energy of Al Cu and Zn are 5.98eV, 7.72eV and 9.39eV respectively. Ionization enthalpy, also known as ionization energy or Ei, is the minimal amount of energy needed to liberate the valence electron, the most loosely bonded electron, from an isolated neutral gaseous atom or molecule. Therefore, the least amount of Ionization energy required to move the valence electron is for Al.

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Answer: D. Slow down the chain reaction by absorbing free neutrons

Explanation: just got it right on the quiz A P E X

Answer:

D

Explanation:

The description of each volcano is

Volcanoes erupt with a highly destructive mixture of ash, lava, hot, dangerous gases, and rock. Explosions from volcanoes have claimed lives.

Volcanic eruptions can bring about additional health risks like wildfires, floods, mudslides, power disruptions, and contaminated drinking water.

The tectonic plate borders are home to 60% of all active volcanoes. The majority of volcanoes are situated along the Pacific Ocean's "Ring of Fire," which is a band of volcanic activity.

Some volcanoes, such as those that make up the Hawaiian Islands, develop at locations known as "hot spots" inside of plates.

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An electron accelerates when it decelerates from a higher to a lower energy level. We are aware that charged particles in acceleration emit energy as electromagnetic radiation.

An atom is a discrete piece of matter that uniquely describes a chemical element. An atom's core nucleus is surrounded by one or more negatively charged electrons, it is made up of all of them. The positively charged nucleus contains one or more protons and neutrons, which are relatively heavy particles.

An electron moves from one energy level to another, absorbing energy in the process. When an electron changes from one energy level to another, energy is released (often as light).

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Entropy will change as a result of a change in the number of gas motes present in a response.

Entropy is the intensity present in the substance frame with steady pressure. The entropy change of the response goes up as the operative number goes up.

In a loose sense, entropy is a measure of energy quality, with lower entropy indicating advanced quality. The energy put down in a painstakingly requested manner( the effective library) has lower entropy.

Entropy is high in chaotically stored energy( the arbitrary-pile library). The substance's intelligence and molarity have a direct impact on the response's entropy.

It is known that the entropy increases when there are more intelligencers of the product.

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Answer:

The molecular formula of butane is C4H10. Calculate its molar mass.58.1 g/mole 14. is answer.

Explanation:

I hope it's helpful!

Answer:

"Anion" is correct option

Explanation:

An anion is an ion that has gained one or more electrons, acquiring a negative charge.

Answer:

32÷5

I'm just tryna get points I'm sorry

goodluck tho❤

Answer:

A liquid evaporated slow at higher temperature bz the vapour pressure of the is higher so few molecule can escape the surface

Answer:

The correct answer is D. A liquid evaporates faster at higher temperatures because more particles have a higher speed and can overcome attractions in the liquid.

Explanation:

I just got it right on Edge.

Hope this helped!

Brainliest would be greatly appreciated :D

They form a new compound with new properties from the original element.

The same components are always present in the same ratios in a compound. Compounds' characteristics differ, sometimes significantly, from the characteristics of the constituent . This is due to the fact that when elements in such a compound combine, a whole new substance with distinct features results.

A compound contains special characteristics that set it apart from the characteristics of its basic elements.

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Answer:

165.3 cm^3

Explanation: hope this is correct!!

P1 * V1 / T1 = P2 * V2 / T2

P1 = 84.6 kPa

V1 = 215 cm³

T1 = 23.5°C = 23.5 + 273 K = 296.5 K

At STP:

P2 = 101.3 kPa

V2 = ?

T2 = 273 K

Heating 500.0 grams of copper (II) sulfate pentahydrate will produce 319.33 grams of anhydrous copper (II) sulfate.

To solve this problem, we need to use the molar mass of copper (II) sulfate pentahydrate.

The molar mass of copper (II) sulfate pentahydrate is:

CuSO₄.5H₂O = 63.55 + 32.07 + (4 × 16.00) + (5 × 18.02) = 249.68 g/mol

The molar mass of anhydrous copper (II) sulfate is:

CuSO₄ = 63.55 + 32.07 + (4 × 16.00) = 159.61 g/mol

The number of moles:

Number of moles of CuSO₄.5H₂O = mass ÷ molar mass

Number of moles of CuSO₄.5H₂O = 500.0 g ÷ 249.68 g/mol = 2.002 mol

Using the mole ratio between CuSO₄.5H₂O and CuSO₄, we know that 1 mole of CuSO₄.5H₂O produces 1 mole of CuSO₄.

Number of moles of CuSO₄ = number of moles of CuSO₄.5H₂O = 2.002 mol

Mass of CuSO₄ = number of moles × molar mass

Mass of CuSO₄ = 2.002 mol × 159.61 g/mol = 319.33 g

Therefore, heating 500.0 grams of copper (II) sulfate pentahydrate will produce 319.33 grams of anhydrous copper (II) sulfate.

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Answer:

(b)  19.9 moles

Explanation:

To convert from moles Al to moles O₂, you need to multiply the given value by the mole-to-mole ratio of each component. This ratio is constructed via the coefficients in the balanced reaction. The desired unit (moles O₂) should be placed in the numerator to allow for the cancellation of units.

2 Al₂O₃ ----> 4 Al + 3 O₂
                    ^         ^            

26.5 moles Al           3 moles O₂
---------------------  x  ----------------------  =  19.9 moles O₂
                                 4 moles Al

Question 19: The fusion of hydrogen releases energy because the mass of a helium nucleus is smaller than the mass of four protons.Question 20: Fusion in the core of a stable massive star cannot proceed beyond iron because it would require temperatures that even stars cannot generate.

Question 19 addresses the reason why the fusion of hydrogen releases energy. The correct statement is that the mass of a helium nucleus is smaller than the mass of four protons. This mass difference results in the release of energy during fusion reactions. In fusion, hydrogen nuclei (protons) combine to form helium nuclei, and in the process, some mass is converted into energy according to Einstein's famous equation, E=mc^2. This energy is released in the form of photons, which can be observed as light and heat.

Question 20 explains why fusion in the core of a stable massive star cannot proceed beyond iron. The correct statement is that it would require temperatures that even stars cannot generate. Fusion reactions in stars involve the fusion of lighter elements to form heavier elements, releasing energy in the process.

However, fusion reactions that produce elements heavier than iron require extremely high temperatures and pressures, which are not achievable in the core of a stable massive star. Iron has the highest binding energy per nucleon, meaning that fusion of iron nuclei would require an input of energy rather than releasing energy. As a result, fusion reactions cease beyond the formation of iron in the core of a star.

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Answer:

water

for one molecule of water each atom has the atomic mass unit, u,shown.

Explanation:

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With the production of Jacopo Peri's mostly forgotten Dafne in Florence in 1598, opera began in Italy at the end of the 16th century.

Particularly from Claudio Monteverdi's L'Orfeo and quickly spread throughout Europe: Jean-Baptiste Lully in France, Henry Purcell in England, and Heinrich Schütz in Germany

The first nation where opera gained popularity was Italy. Claudio Monteverdi and Jacopo Peri called it home. This exciting form of entertainment eventually spread throughout the remainder of Europe. Italy, France, and Germany are the primary producers of opera.

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Answer:

Methane -1,Ethene 2 , Ethane 2,Pentane 5,Propene 3,Hexane 6,Ethyne 2,Propane 3,Octane 8,Heptane 7 Decane 10,Butyne 4,Butane 4,Propyne 3,Butene 4

Answer:

Methane: 1

Ethane: 2

Ethene: 2

Pentane: 5

Propene: 3

Hexane: 6

Ethyne: 2

Propane: 3

Hexane: 7

Octane: 8

Decane: 10

Butyne: 4

Butane: 4

Propyne: 3

Butene: 4

Explanation:

Use the chemical formula of the compounds:

Methane ⇒ \(CO_4\)             Hexane ⇒ \(C_6H_14\)        Decane ⇒  \(C_10H_22\)

Ethane ⇒ \(C_2H_6\)                Ethyne ⇒ \(C_2H_2\)          Butyne ⇒ \(C_4H_6\)

Ethene ⇒ \(C_2H_4\)             Propane ⇒ \(C_3H_8\)         Butane ⇒ \(C_4H_10\)

Pentane ⇒ \(C_5H_12\)             Hexane ⇒ \(C_7H_16\)      Propyne ⇒ \(C_3H_4\)

Propene ⇒ \(C_3H_6\)           Octane ⇒ \(C_8H_18\)            Butene ⇒ \(C_4H_8\)

In the chemical formulas above, each formula has things known as coefficients (elements) and subscripts (atoms).

So to further explain, take methane as an example, there is a "C" at the beginning. C is capital as it is a pure substance and is a element. This also means there is 1 carbon atom in methane while there is 4 oxygen atoms. But to explain further, let's review definitions:

A pure substance composed of two or more elements composed of two or more elements.

A pure substance is a single element or compound, not mixed with any other substance

One of a class of substances that cannot be separated into simpler substances by chemical means.

A chemical formula that indicates the kinds of atoms and the number of each kind in a molecule of a compound.

So after reviewing let's find the carbon atoms.

The subscripts in each chemical formula that are to the right to the "C" are the amount of carbon atoms. If a capital letter does not have a subscript, it is assumed to have 1 atom only.

Your answers can be found above.

Answer:

Changing the concentration of one solution in the cell will increase the voltage potential of the cell because you are putting the system further out of equilibrium. Because the concentration in only one side of the cell has changed, the concentration gradient across both sides of the cell becomes steeper. In order for this experiment to work, the salt bridge must be concentrated enough to effectively separate the two electrolyte solutions, but it must also be porous enough to allow ionic flow.

Explanation:

think so you like it

The value calculated by using excess if NaOH by overshooting endpoint  during titration will be not correct.

The value of concentration is supposed to change when excess of NaOH is used. it will be little too high than the correct value. Thus, titration require precise values. Overshooting the endpoint will result in a calculation error for the solution that is being titrated. The calculation for the titrated solution will be off if the moles of titrant are incorrect because the volume of titrant is incorrect because it is higher than it should be.

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Answer: it is D

Explanation:its D cause that is a opinion it is not sientificly correct

D) 2.05 g N. The molar mass of N2H4 is 32.045 g/mol. To calculate the mass of N in 2.34 g of N2H4, we need to first calculate the number of moles of N2H4:

moles of N2H4 = (mass of N2H4) / (molar mass of N2H4)
moles of N2H4 = 2.34 g / 32.045 g/mol
moles of N2H4 = 0.073 mol

Since there are two N atoms in one N2H4 molecule, we need to multiply the number of moles of N2H4 by 2 to get the number of moles of N:

moles of N = 2 x moles of N2H4
moles of N = 2 x 0.073 mol
moles of N = 0.146 mol

Finally, we can calculate the mass of N:

mass of N = (moles of N) x (molar mass of N)
mass of N = 0.146 mol x 14.007 g/mol
mass of N = 2.05 g

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Peroxide is sprayed on all samples before any indicator so as to bleach the samples  before staining by the indicators

peroxide is any of a class of chemicals in which 2 oxygen atoms are linked together by a single covalent bond peroxide is useful in bleaching as they are agents bleaching.

The peroxide when applied to the sample it reduces color bodies in pulp by oxidizing the carbonyl group making the samples colorless.

When the indicator is applied to a sample that is bleached the indicator penetrates this highlights important features of the tissue as well as enhances the tissue contrast.

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Ruthenium is a transition metal and it is located in period 5 and group 8 of the periodic table, along with iron (Fe) and osmium (Os).

Ruthenium is commonly found in many industrial and commercial applications, including in the production of hard disk drives, electrical contacts, and jewelry. Some common molecules and compounds that ruthenium is a part of include:

Ruthenium dioxide (RuO2) - a compound commonly used in the production of resistors and other electronic components.

Ruthenium tetroxide (RuO4) - a highly toxic and volatile compound that is used as an oxidizing agent in organic chemistry.

Ruthenium red - a dye used in biological staining and electron microscopy.

Ammonium hexachlororuthenate (NH4)2[RuCl6] - a ruthenium compound used in electroplating and as a precursor for other ruthenium compounds.

Various ruthenium complexes - such as [Ru(bpy)3]2+, which is a commonly used photochemical catalyst.

These are just a few examples of the many molecules and compounds that ruthenium is a part of.

Since potassium bromide is replaced by element X to generate KX and Br2, we can infer from the reaction that element X is more reactive than bromine.

As a result, potassium bromide is represented by the formula KBr, but when the potassium and bromide ions are written separately, they are K+ and Br.

As a result, when chlorofluorocarbon gas is passed through a potassium bromide aqueous solution, bromine gas is released, which causes the solution to turn brown.

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