the process in which an atom or ion experiences a decrease in its oxidation state is _____________.

Answer:

host

Explanation:

the virus exploits your cells

Answer:

parasite is worse than throwing up

Explanation:

throwing up tells you that you can't have an infection in every way possoble

The number of moles are equal to 4.0 × 10²⁵ atoms of tungsten is 0.6624 moles.

Mole is the amount of substance that contain the element chemical units present in 12 g of carbon - 12.

given that :

number of  present in atoms of tungsten =  4.0 × 10²⁵

1 mole contains = 6.022 × 10²³ atoms

therefore, 4.0 × 10²⁵ atom will contains :

number of moles = 4.0 × 10²⁵ / 6.022 × 10²³

number of moles = 0.6642 moles.

Thus, The number of moles are equal to 4.0 × 10²⁵ atoms of tungsten is 0.6624 moles.

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Answer:The formula for molality is m = moles of solute / kilograms of solvent.

Explanation:

Glucose is the simplest sugar and carbohydrate that provides energy. The simplified model of glucose (C₆H₁₂O₆) shows carbon, hydrogen, and oxygen atoms linked together.

Glucose is an example of a carbohydrate macromolecule that is further classified as a monosaccharide. They are crystalline and fundamental units of carbohydrates.

The molecular formula of glucose is C₆H₁₂O₆ and the mass is 180.156 g/mol. It is an aldohexose that contains an aldehydic functional group. In its structure, there are six oxygen atoms, six carbon atoms, and twelve hydrogen atoms.

Therefore, the glucose molecule is composed of C, H, and O.

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The given reaction is the calcium carbide reaction of calcium hydroxide with water to produce acetylene.

The balanced equation is CaC2+2H2OCa(OH)2+C2H2.

Molar mass of acetylene, C2H2 = 2x12+2x1 = 26 g/mol

we get 64 g of CaC2 becomes 26 g of C2H2. 5.0g CaC2..

Molecular weight of Ca(OH)2=1(atomic weight of Ca)+2(atomic weight of O)+2(atomic weight of H)=40+2(16)+2(1)=40+32+2=74.

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True, the specific heat capacity of an object depends only on the substance from which the object is made.

Specific heat capacity is defined as the amount of heat required to raise the temperature of one gram of a substance by one degree Celsius.

The SI unit of specific heat capacity is joule per kelvin per kilogram.

The specific heat capacity at constant volume is written as,

\(C_{V} = (du/dt)_{V}\)

The specific heat capacity at constant pressure is written as,

\(C_{P} = (dh/dT)_{P}\)

here, u is the internal energy of system in kJ/kmol and h is the enthalpy of system in kJ/kmol.

For an Ideal gas the relation between heat capacity at constant volume and at constant pressure can be written as ,

\(C_{P} - C_{V} = R\)

Specific heat capacity is an intensive property i.e., independent of quantity. No matter how much substance we have, its ability to absorb heat energy at a particular temperature is the same.

So, we can say that the specific heat capacity of an object depends only on the substance from which the object is made and not on its quantity.

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The molarity of a stock solution of 0.100m potassium permanganate required to prepare 100 mL of 0.0250 m potassium permanganate solution is 0.0625m.

The volume of the stock solution needed can be calculated using the formula given below:

Volume of stock solution = (Molarity of dilute solution x Volume of dilute solution) ÷ Molarity of stock solution

M1V1=M2V2, where M1 and V1 are the molarity and volume of the stock solution, and M2 and V2 are the molarity and volume of the diluted solution we need to prepare.

Using the above formula, we can calculate the required volume of stock solution as follows: M1V1 = M2V2

Hence, (0.0250 x 100) = 0.100×V1

Hence, V1 = 25 ml

Therefore, 25 ml of 0.100m potassium permanganate stock solution is needed to prepare 100 ml of 0.0250 m potassium permanganate solution.

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To make 100 mL of 0.0250 M potassium permanganate from a 0.100 M stock solution, you would need to dilute 25.0 mL of the stock solution to a total volume of 100 mL.

A stock solution is a concentrated solution of a chemical that is used to prepare working solutions of a desired concentration. Stock solutions are typically prepared by dissolving a known weight of the chemical in a solvent to a known volume. Working solutions are prepared by diluting the stock solution with a solvent to the desired concentration.

Target concentration = 0.0250 M

Stock concentration = 0.100 M

Target volume = 100 mL

Required volume of stock solution = (Target concentration * Target volume) / Stock concentration

= (0.0250 M * 100 mL) / 0.100 M

= 25.0 mL

Hence, you would need to dilute 25.0 mL of the 0.100 M potassium permanganate stock solution to a total volume of 100 mL to obtain a 0.0250 M potassium permanganate solution.

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We can see here a CER that explains how Newton's second law of motion applies to the activity:

Claim:

Newton's second law of motion states that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to the mass of the object.

The given claim means that the more force you apply to an object, the faster it will accelerate, and the more mass an object has, the slower it will accelerate.

Evidence:

In the activity, we observed that the cart accelerated more when we applied a greater force to it. We also observed that the cart accelerated less when we increased the mass of the cart. This is consistent with Newton's second law of motion.

Reasoning:

The greater the force acting on an object, the greater the acceleration. This is because the force is what causes the object to change its motion. The more mass an object has, the more inertia it has.

Conclusion:

Newton's second law of motion is a fundamental law of physics that describes the relationship between force, mass, and acceleration. It is a powerful tool that can be used to understand and predict the motion of objects.

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The pressure at the bottom : 19600 N/m²

Given

A ground water tank has its height 2m

Required

The pressure at its bottom

Solution

Hydrostatic pressure is the pressure caused by the weight of a liquid.  

The weight of a liquid is affected by the force of gravity.  

The hydrostatic pressure of a liquid can be formulated:  

\(\large{\boxed{\bold {P_h ~ = ~ \rho.g.h}}\)

Ph = hydrostatic pressure (N / m², Pa)  

ρ = density of liquid (kg / m³)  

g = acceleration due to gravity (m / s²)  

h = height / depth of liquid surface (m)  

ρ = density of water (kg / m³) = 1000

g = acceleration due to gravity = 9.8 m/ sec²

The pressure

\(\tt P=1000\times 9.8\times 2=19600~N/m^2\)

The characteristics and the type of molecular bond they describe:

1. Bonds found in Halite (between Na⁺ and Cl⁻): Ionic bond

2. Bonds found between Si and O in the Si-O tetrahedron: Covalent bond

3. Bonds inside the water molecule (between the H and O): Covalent bond

4. Bonds that exist between two water molecules: Hydrogen bond

5. Strongest bond type: Covalent bond

6. Weakest bond type: Van der Waals bond

7. Bonds that are used by water to dissolve salt: Ionic bond

The ionic bond is a type of molecular bond found in halite (between Na⁺ and Cl⁻). The Si-O tetrahedron is held together by a covalent bond. The bond inside the water molecule (between the H and O) is also a covalent bond. The hydrogen bond is the type of bond that exists between two water molecules. The covalent bond is the strongest bond type, while the van der Waals bond is the weakest bond type. Water uses the ionic bond to dissolve the salt.

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24 ticks will be equivalent to  5184 bulps

6 gobs = 1 bulp

18 bulps=1 lith

12 liths = 1 tick

If 1 tick equals 12 lith, then 24 ticks will be:

                   12 x 24 = 288 liths

If 1 lith equals 18 bulps, then 288 liths will be:

                18 x 288 = 5184 bulps.

If 1 bulp equals 6 gobs, then 5184 bulps will be:

                           6 x 5184 = 31104 gobs.

In summary, 24 ticks will be equivalent to 5184 bulps or 31104 gobs.

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The scientific statement is

D. There is life on some other planet in the universe aside from Earth.

A scientific statement is a statement that is based on empirical evidence, logical reasoning, and the scientific method. It is a claim or proposition that can be tested, observed, or measured, and is subject to scrutiny and verification.

Scientific statements are characterized by objectivity, reliance on evidence, and the potential for falsifiability or validation through experiments or further investigation. these statements aim to describe, explain, or predict phenomena in the natural world and are an essential part of scientific inquiry and the advancement of knowledge.

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complete question

Which sentence is a scientific statement?

A.

Food cooked in ceramic pots has a better aroma than food cooked in copper pots.

B.

A tall glass of water tastes better with a lemon wedge and ice cubes.

C.

Today, there are more viewers watching baseball than ice hockey on television.

D.

There is life on some other planet in the universe aside from Earth

Energy required to take a 22. 0-g sample of liquid water at 25. 0 °c to steam at 145. 0 °c is 58.6 KJ.

q1 = heat required to warm the water from 25.0 °C to 100.0 °C.

    = mCΔT

    = 22.0 g x  4.184 J∘C−1g−1 x 75

    = 6903.6 J

q2 = heat required to vapourize the water to steam at 100 °C.

    = mΔH vap  

    = (22.0 g  x 40.7  103  J/ mol )/18 g/ mol

    = 49744. 4 J

q3= heat required to warm steam from 100°C to 145.0 °C.

    = mCΔT

    = 22.0 g x  2.01 J∘C−1g−1 x 45°C

    =  1989.9 J

Total energy required to  take a 22.0 g sample of liquid water at 25.0 degrees Celsius to steam at 145.0 degrees Celsius is:

   =  q1   +  q2  + q3

   =  6903.6 J  + 49744. 4 J + 1989.9 J

   = 58,637.9 J

   = 58.6379 KJ

   = 58.6 KJ

Energy is described as having the "ability to conduct work, which is the capacity to apply a force that causes an item to be displaced.

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Answer:

- The chemical reaction is not balanced. There is two oxygens on the reactant's side while there's only one oxygen on the products side.

- I would not say it's following the law of conservation of mass as it's not a balanced equation.

- To balance this equation, you would need to add the coefficient of '2' to Magnesium (Mg) on the reactants side, and add the coefficient of '2' to the products side.  This would make it so that there's 2 Mg's and 2 O's on both the reactant's side and products side.

edit: I hope this helped you in some way. ^^

To calculate the value for the molecular weight of your unknown been affected if a small quantity of the unknown stuck to the metal stirring rod and failed to dissolve in the benzophenone following is the process:

Your mass of counted solute added to the detergent would be lower than the recorded value performing in a lower temperature change grounded on mass of solute. A lower temperature change will affect in a lower number of calculated intelligencers of solute present. This will give a advanced molar mass for your unknown compared to the real molar mass( lower number of intelligencers divided into the mass of solute gives a larger molar mass).

These two scenarios are predicated on a solute-solvent mixture's lower freezing-point (or melting-point) as compared to pure solvent. A nonelectrolyte solute's equation is:

ΔTf = Kfm

Kf is the solvent's specific molal freezing-point depression constant, and m is the molality of the solution mixture.

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Answer:

the fish is the organism that evolved last

Answer:

A-cycles of the moon

Explanation:

The people of Ancient Greece, Rome and China counted their year based on a 12 moon cycle ( that is, about 354 days). A 13th cycle of the moon is included so that the lunar year remains in step with the seasons of the year.

Today, the Gregorian calendar is mostly used around the world. This calendar was

actually adapted from an earlier lunar version. Ancient civilizations used the phases of the moon to help identify the seasons.

The major difference between the lunar calendar and the solar calendar is the kind of celestial body that is used to determine time.

Answer:

In chemistry and atomic physics, the main group is the group of elements whose lightest members are represented by helium, lithium, beryllium, boron, carbon, nitrogen, oxygen, and fluorine as arranged in the periodic table of the elements. The main group includes the elements in groups 1 and 2, and groups 13 to 18.

Answer:

omg

Explanation:

omg omg omg omg omg omg omg omg omg omg I can't either ehhhhhh

Chiral and devoid of any symmetry components, the complex [Cr(ox)3]3 is. It has two different forms: d and l. The achiral complexes cis [PtCl2 (en)], cis [RhCl2(NH3)4]+and have symmetry components.

cis‐[PtCl2(en)] Due to the twist in the en ligand, this molecule would be chiral. In the octahedral cobalt(II) and zinc(II) complexes made from the Schiff base, the chiral conformation of the diamine precursor is preserved. The chiral component of the two is cis-[CrCl2(OX)2]3. Geometrical isomerism may be present because two chlorine ligands may be trans in one isomer and cis in the other. It is impossible to achieve optical isomerism because both isomers contain a plane of symmetry.

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Answer:

Im like 75% sure that the answer is C.

Explanation:

Hope this helps! Have a great day. Remember your amazing and you got this! Alycia <3

the real gas pressure for above question was 91.4atm

what is van der waals equatio?

The Van der Waals equation (or Van der Waals equation of state) is an equation of state used in chemistry and thermodynamics that extends the ideal gas law to take into account the effects of interactions between molecules in a gas as well as accounting for the finite size of the molecules.

The ideal gas law views gas molecules as point particles that interact only with their surroundings and not with one another, which means that when they collide, they do not occupy any space or change their kinetic energy.

The volume V occupied by n moles of any gas has a pressure P at a temperature T determined by the following relationship, according to the ideal gas law, where R is the gas constant:

PV=nRT

(pxn2a/v2) (v-nb)=nRt

p 10x1.36/2.41x2.41-10x0.0318

p 13.6/2.41x2.092

nRt=p2.69

10x0.08206x300/2.69

=91.4atm

therefore the real gas pressure =91.4atm

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The first blank should be filled with "chemical shift." The chemical shift is the position of a signal on the NMR spectrum, and it is measured in parts per million (ppm). The chemical shift is determined by the magnetic field experienced by the hydrogen atoms in the molecule and is influenced by the surrounding electron density.

The second blank should be filled with "splitting." Splitting is the appearance of a signal on the NMR spectrum and is caused by the spin-spin coupling between neighboring hydrogen atoms. The splitting is based on the formula N+1, where N is the number of equivalent neighboring hydrogen atoms. The splitting pattern gives information about the number and arrangement of hydrogen atoms in the molecule.

The third blank should be filled with "integration." Integration is the area under a signal on the NMR spectrum and is proportional to the number of hydrogen atoms that produce the signal. Integration allows us to determine the relative number of hydrogen atoms in different parts of a molecule and is useful in determining the molecular formula of an unknown compound.

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The order of the reducing strength for the given metals can be determined by their standard reduction potential values. The higher the standard reduction potential value, the stronger the reducing agent. The order from strongest to weakest reducing agent is Mg, Zn, Cu, and Pb.

A strong reducing agent is a substance that easily loses electrons and can reduce other substances, while a weak reducing agent loses electrons with difficulty and cannot reduce other substances easily.

The balanced chemical reaction for Ag metal reducing Cu2+ is as follows: 2Ag + Cu2+ → 2Ag+ + Cu.

Cu2+ gains two electrons as it goes from Cu. This difference in the number of electrons is reflected in the balanced equation by adding two electrons to the left side of the equation.

Ag is a stronger reducing agent than Cu, Mg, Zn, and Pb, as it has a higher standard reduction potential value.

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a) Balanced equation: \(2 HNO_3 + Ca(OH)_2\)  →\(Ca(NO_3)_2 + 2 H_2O\)

b) Molarity of \(HNO_3:\) 0.514 M

c) Molarity of the base: 1.14 M

a) The balanced equation for the acid-base reaction between \(HNO_3\)(nitric acid) and Ca(OH)2 (calcium hydroxide) is:

\(2 HNO_3 + Ca(OH)_2\)→ \(Ca(NO_3)_2 + 2 H_2O\)

b) To find the molarity of HNO3, we need to calculate the number of moles of solute (HNO3) and divide it by the volume of the solution in liters. Given that the molar mass of HNO3 is 4 g/mol and the mass of the solute is 10.3 g, we can calculate the number of moles:

Number of moles = Mass of solute / Molar mass of solute

= 10.3 g / 4 g/mol

= 2.575 mol

The volume of the solution is given as 900 mL, which is equivalent to 0.9 L. Therefore, the molarity of HNO3 is:

Molarity = Number of moles / Volume of solution

= 2.575 mol / 0.9 L

≈ 2.861 M

Rounded to three significant figures, the molarity of HNO3 is approximately 0.514 M.

c) To determine the molarity of the base, we can use the stoichiometry of the balanced equation. From the equation, we can see that 2 moles of HNO3 react with 1 mole of Ca(OH)2. This means that the mole ratio of acid to base is 2:1.

Given that 35 mL of the base reacts with 15 mL of acid, we can calculate the volume ratio:

Volume ratio = Volume of base / Volume of acid

= 35 mL / 15 mL

= 2.33

Since the mole ratio is 2:1, the molarity of the base is also 2.33 times that of the acid.

Molarity of base = 2.33 * Molarity of acid

= 2.33 * 0.514 M

≈ 1.20 M

Rounded to three significant figures, the molarity of the base is approximately 1.14 M.

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Explanation:

hope it make sense to u :)

Answer:

B

CuO

H2

Explanation:

hydrogen will oxidized to form water

Copper(II) oxide reacts with hydrogen.

\(CuO + H_2\) → \(Cu + H_2O\)

Oxidising agent - \(Cuo\)

Reducing agent - \(H_2\)

A chemical reaction that takes place between an oxidizing substance and a reducing substance.

The oxidizing substance loses electrons in the reaction, and the reducing substance gains electrons.

In the reaction  \(CuO + H_2\) → \(Cu + H_2O\)  

\(Cuo\) is the oxidising agent and  \(H_2\) is the reducing agent because \(Cuo\)  is oxidising  \(H_2\) and \(H_2\) is the reducing agent because it is removing oxygen from \(Cuo\).

Hence, option B is correct.

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