you are given two samples of elements, and each sample has a mass of 10 grams. if the number of atoms in each of these samples is the same, what must be true of the two elements?

The only ion that is seen to be a negative ion in cobalt III sulfide is the sulfide ion.

The term anion just means a negative ion. We know that when we have an ionic compound, the ionic compound would have a positive ion which would have a plus sign and a negative ion which would have a minus sign.

We have to look at the compound that is called cobalt sulfide. there are two ions here, the cobalt III ion and the sulfide ion. The cobalt III ion is positive while the sulfide ion is negative.

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The  spin quantum number will be 2 and 2.5 and multiplicity in each case will be 5 and 6.

The angular momentum of such an electron is described by its spin quantum number (ms). An electron carries orbital angular momentum in addition to angular momentum around its axis of rotation. The Spin Quantum Number (s) really does have a magnitude (1/2) and a direction (+ or -) since angular momentum would be a vector.

(i) If an atom has 4 electrons then it will have total

Total spin quantum number = 1/2+1/2+1/2+1/2 = 4/2=2

Multiplicity = 2S+1= 2×2+1=5

(ii)  If an atom has 5 electrons then it will have

Total spin quantum number = 1/2+1/2+1/2+1/2+1/2 = 5/2 = 2.5

Multiplicity = 2S+1= 2×2.5+1=6

Therefore, the spin quantum number will be 2 and 2.5

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volume of HCl would you need for the neutralization is 4 ml .

What is neutralization reaction  ?

In chemistry, neutralization or neutralization (see spelling difference) is a chemical reaction in which acids and bases react quantitatively with each other. When reacting in water, neutralization does not generate excess hydrogen or hydroxide ions in solution. The pH of the neutralized solution depends on the acidity of the reactants.

In the context of chemical reactions, the term neutralization is used for reactions between acids and bases or alkalis. Historically, this reaction was expressed as

Example:

HCl + NaOH → NaCl + H2O

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The correct option are option C,E that is bonds between a sulfur atom and two hydrogen atoms were broken.  Zinc atom formed a bond with one sulfur atom.

Chemical reaction is a process in which two or more than two molecules collide in right orientation and energy to form a new chemical compound. The mass of the overall reaction should be conserved. There are so many types of chemical reaction reaction like combination reaction, double displacement reaction.

In the give reaction, bonds between a sulfur atom and two hydrogen atoms were broken. zinc atom formed a bond with one sulfur atom.

Therefore, the correct option are option C,E.

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since you  have  Sulphur dioxide in the experiment    . Use Charles' Law,  to know the volume [tex]V 1 /T 1 = V 2/ T 2[/tex]

what is the volume of the gas ?

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2.5 moles of chloride ions can be found in a solution made from 1.25 moles of magnesium chloride.

Magnesium Chloride is an remedy used to save you and deal with low amounts of magnesium inside over the counter blood. Magnesium is crucial for over the counter everyday functioning of cells, muscle mass, bones, nerves, and over-the-counter heart. This medicine is to be had as an injectable solution and isn't always covered over-the-counter aid of Medicare.

Eye may reason mild eye irritation and skin can also motive skin inflammation. Ingestion causes gastrointestinal inflammation with nausea, vomiting and diarrhea. Inhalation may also motive breathing tract inflammation.

Magnesium chloride is likewise safe for guys, ladies, children, and throughout pregnancy. over the counter magnesium chloride can also help over-the-counter body process and soak up some over the counter critical mineral, calcium. Magnesium has also been shown to contribute to a healthy coronary heart, ordinary blood stress degrees, strong bones.

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Answer:

linear

Explanation:

carbon doixide is a nonpolar covalent bond since their polar charges repels each other at 180 degrees that is why its linear.

please rate it,thanks.

If you take 0.0072 grams, you should Penicillin dose for newborns is 7.2 mg per kilogram of body weight.

Infections brought on by bacteria are treated with penicillins. By eradicating the germs or stopping their growth, they function. Penicillins are available in numerous varieties. Different infections are treated with each differently.

To treat staphylococcal and streptococcal bacterial infections, penicillin is a common antibiotic that is administered. Penicillin is a member of the antibiotic class known as beta-lactams, whose members all work by preventing the growth of bacterial cells, which eventually results in bacterial eradication.

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The current that flows in the circuit is obtained as 1.23 A.

We know that the RLC circuit is one that contains a resistor in addition to a capacitor or an inductor. In either case, the resistance that is offered to the flow of current by the capacitor or the inductor as the case may be is called the reactance.

Given that;

Impedance (Z) = √R^2 + XC^2

R = resistance

XC = capacitive reactance

Z = √(40)^2 + (70)^2

Z = 81 ohms

Now;

V = IZ

V = voltage

I = current

I = V/Z

I =  100 volts/81 ohms

I = 1.23 A

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Answer:

Solubility is the best to dissolve

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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Answer:B

Explanation: according  to the law of electrostatics it states that  "unlike charge attract each other and like charges repel each other ".

The most accurate method of weighing for this student to obtain the mass of crude acetanilide without pre-weighing is by taking the difference between weights of the crude acetanilide with the flask and the empty flask.

What are some of the different ways of weighing compounds in laboratory?

The most accurate way of weighing the crude acetanilide without pre-weighing is to weigh the crude acetanilide with the Erlenmeyer flask and then empty it completely and weigh the empty flask again. Then calculate the difference to get the mass of crude acetanilide.

Therefore, the weighing by difference method can be used to measure the weight of the crude acetanilide.

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Wegener suggested that the deserts of Africa were once covered in ice and that the striations were formed by the movement of the ice across the desert floor.

Glacier striations are grooves or scratches in the bedrock that have been created by a glacier sliding over the surface. They are typically found in areas where the ice has melted away, revealing the bedrock beneath.

Wegener suggested that the deserts were once wetter and lusher. He proposed that the climate has gradually changed over time, making the deserts arider. This is supported by evidence of ancient riverbeds and lakes in the Sahara Desert.

Glacier striations can be used to help researchers learn about the history of a particular glacier and the climate in the area where it is located. For example, the direction of the striations can indicate the direction the glacier was moving and the depth of the striations can give clues about how deep the glacier was.

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Net Force = Mass × Acceleration, or F = m × a.

Acceleration is a change in an object's motion, like when Zeke speeds up on his skateboard. Every time an unbalanced force acts on an object, acceleration happens. Although the mass of the object also influences its acceleration, the acceleration of an object is primarily determined by the net force exerted on it.

Greater acceleration is possible for a given force when the mass of an object is smaller. These interactions are encapsulated by Newton's second law of motion. This rule states that an object's acceleration is equal to the net force exerted on it divided by its mass.

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The phrases that describes the similarities between problem space theory and how the brain looks at problems is option C: They can occur quickly or slowly.

The category of problem-solving techniques used in social science includes the problem space theory. The problem space theory employs the strategy of characterizing the issue before seeking a resolution. The focus of a problem space is on the stages and objectives involved in solving a problem rather than providing details of a solution.

Note that Your heart rate increases as your brain releases a surge of adrenaline, causing you to become stiff and shake. Despite the absence of difficulties, the brain is programmed to find solutions. The brain invents a new problem to remedy when there is nothing to tackle.

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See full question below

Which of the following phrases describes the similarities between problem space theory and how the brain looks at problems?

They have only three steps.

They can only be used in a laboratory setting.

They can occur quickly or slowly.

They are biased against the scientific method.

The digital signal is a signal that encodes data as a series of discrete values; at any one moment, it can only take on a maximum of one of a finite set of values.

A digital signal, in contrast, represents continuous values; it always reflects a real number within a continuous range of values. Information is represented by simple digital signals in discrete analogue level bands. The same information state is represented by all levels in a band of values. The signal in the majority of digital circuits can have two legitimate possible values; this is known as a binary signal or logic signal.

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The molar concentration of acetic acid in vinegar is 64.62 M

Titration is known as the quantitative concentration of a given solution. It is also known as the quantitative analysis.

In the given condition we have 33.38ml of 0.1936 molar of NaoH solution to titrate 10ml of HC2H3O2.

Therefore,

HC2H3O2 + NaoH - H2O + NaC2H3O2

       The concentration of the given base (NaoH) = 0.1936 molar.

        The volume of the given bae = 33.38ml.

         The volume of acetic acid = 10ml.

We can denote the concentration and volume of the given samples as,

Ca = concentration of acetic acid

Cb = concentration of the base( NaoH)

Va = volume of acetic acid

Vb = volume of base.

      By putting the value in equation, we get

Ca x Va = Cb x Vb

since, we need to find Ca, we need to shift the Va to the right-hand side.

Therefore,

Ca = Cb x Vb/ Va

Substituting the values we get,

Ca= 0.1936 x 33.38/ 10

Ca = 64.62 M

  Therefore, the molar concentration of acetic acid is 64.62M

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The rate constant for the reaction is the relation between the concentration of the reactant and the chemical rate of reaction.

The rate constant of the chemical reaction is the proportionality constant  that describes the relationship between the concentration of the reactants and the chemical rate of reaction. The symbol of rate constant is k. Rate is depends on the temperature.  unit for the zero order reaction is : L⁻¹ s⁻¹. unit of rate constant for the first order reaction is : s⁻¹. unit for the rate constant for second order reaction is : mol⁻¹ L s⁻¹.

Thus, The rate constant for the reaction is the relation between the concentration of the reaction and the chemical rate of reaction.

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The ability of solar energy to lower greenhouse gas emissions is the first and possibly most well-known advantage of this technology. This occurs as a result of solar energy as a coal energy substitute (the production of which harms the environment). Solar energy generation and consumption don't contribute to air pollution or the release of greenhouse gases.

As a result, making the simple effort to get in touch with local solar providers and switching to sustainable energy can have a significant long-term benefit.

Overall, switching to renewable energy will enable you to achieve your goals for sustainable living while also saving money. For instance, using solar energy lowers greenhouse gas emissions. Additionally, it prevents stress on the ecosystem and the world's water supply.

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Answer:

grams Sucrose = 0.0029214440066693 mole using the molecular weight calculator and the molar mass of C12H22O11.

Answer: 5.41 moles

N=m/M

  = 1850/12*12+22*1+16*11

N= 5.41 moles

For atleast 15 mins

Lab safety

For small liquid spill or splash that affects only a small area of skin, you should immediately flush skin with flowing water for at least 15 minutes (30 minutes for bases).

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A shorter, easier way to show chemical reactions, using symbols instead of words, is called a Chemical equation.

All the elements in chemistry have specific name and properties. Along with this, they all have a particular sign like Na for sodium, Ar for Argon and K for potassium.

Rather than writing the full name in words of the elements, we write only the symbols of the element along with the products and the reactants separated by using a arrow pointing towards products side.

For example,

Chemical reaction: Sodium hydroxide reacts with Hydrogen chloride to form Sodium chloride and water.

Chemical equation: NaOH + HCl → NaCl + H₂O.

So, as we can see from the example, the chemical equation is much more easier to understands and shorter.

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When writing the chemical equation for a reaction, a reactant in aqueous solution is indicated with (aq); formation of a solid is indicated with (s).

Chemical equations serve to represent the transformation of reactants into products. For instance, the combination of iron (Fe) and sulphur (S) results in iron sulphide (FeS). The plus symbol indicates that sulphur and iron react to form FeS.

The four primary categories of chemical reactions are single displacement, double displacement, breakdown, and synthesis. But keep in mind that other people refer to these reactions by other names.

They are equations that represent chemical reactions using chemical formulae and symbols. In a chemical equation, the reactants are represented on the left and the products are on the right. A symbol that denotes the reaction's direction separates these two entities.

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At 1 atm pressure the heat of sublimation of gallium is 277 kJ/mol and the heat of vaporization is 271 kJ/mol. heat is required to melt 0.500 mol of gallium at 1.00 atm pressure is 3 kJ.

The data given as follows :

The heat of sublimation of gallium = 277 kJ/mol

The heat of vaporization = 271 kJ/mol

The difference between the  heat of sublimation of gallium and the heat of vaporization is given as :

ΔH = heat of sublimation  -  heat of vaporization

ΔH = 277 kJ/mol - 271 kJ/mol

ΔH = 6 kJ/mol

The heat required = n ΔH

                              = 0.500 × 6

                              = 3 kJ

Thus, At 1 atm pressure the heat of sublimation of gallium is 277 kJ/mol and the heat of vaporization is 271 kJ/mol. heat is required to melt 0.500 mol of gallium at 1.00 atm pressure is 3 kJ.

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Dendrochronology and seriation give the idea of the past events around us. Therefore, option B is the correct answer.

Dendrochronology is both an old and a modern science. Just counting tree rings sounds simple, but in the context of forest dynamics tree age is an important and valuable parameter.

     Calculating the years of the formation of tree gives us the idea of how old and strong that particular tree is. It is important in case of geology.

    For a long time, dendrochronology was associated with the dating of old houses, paintings, and archaeological samples. In recent decades however it has become a science with a broad range of applications such as global climate change, canopy process decline, the carbon cycle, and many others.

   Seriation, also called artifact sequencing, is an early scientific method of relative dating, invented by the Egyptologist Sir William Flinders Petrie in the late 19th century

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Answer:

The answer is sophisticated earthquake early-warning systems, increasingly accurate storm forecasting, and innovative flood risk and flood mitigation projects provide communities with the tools they need to respond to impending hazard events, and infrastructure design and engineering improvements help to reduce the damage suffered

Explanation:

I hope this helps

Increasing the concentration of N2(g) will causes the equilibrium to shift to the right.

Chemical equilibria can be shifted by changing the conditions that the system experiences. We say that we "stress" the equilibrium. When we stress the equilibrium, the chemical reaction is no longer at equilibrium, and the reaction starts to move back toward equilibrium in such a way as to decrease the stress.

According to Le Chatelier's principle, a change in one of the variables that describe a system at equilibrium produces a shift in the position of the equilibrium that counteracts the effect of this change.

In the synthesis of ammonia the equilibrium will shift to right only when we increase the concentration of N2(g). Because increasing nitrogen gas causes more ammonia to be produced, so the concentration of ammonia must increase.

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