can you add different elements in a chemical equation

In the case of the equilibrium reaction provided, if the concentration of Co(H2O)2+ is increased, the reaction will shift to the right in order to consume the excess Co(H2O)2+ and produce more CoCl2 and H2O.

Conversely, if the concentration of CoCl2 is increased, the reaction will shift to the left in order to consume the excess CoCl2 and produce more Co(H2O)2+ and Cl- ions.

According to Le Chatelier's principle, a change in concentration of one or more of the reactants or products of a chemical reaction at equilibrium will cause a shift in the equilibrium position to counteract the change and re-establish equilibrium.

Specifically, if the concentration of one of the reactants is increased, the reaction will shift in the direction that consumes that reactant in order to restore equilibrium.

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Answer:

Due to the difference in the relative atomic masses and therefore, the molecular masses of Zn and Pb, one mole of Zn is about 3.2 times lighter than one mole of Pb

Explanation:

From the periodic table, we have;

The atomic number of zinc, Zn = 30

The atomic mass of zinc, Zn = 65.38 amu

The molar mass of zinc, Zn = 65.38 g/mol

The atomic number of lead, Pb = 82

The atomic mass of lead, Pb = 207.2 amu

The molar mass of lead, Pb = 207.2 g/mol

Therefore, whereby equal number of moles of Zn is lost and Pb is gained, we have;

Mass of 1 mole of Zn = 65.38 grams

Therefore, 1 gram of Zn = 1/65.38 moles = 0.0153 moles

0.12 grams of Zn = 0.12×0.0153 = 0.00184 moles of Zn

Given that equal number of moles of Zn and Pb are involved in the reaction, the number of moles of Pb gained = 0.00184 moles

The mass of Pb gained = Number of moles of Pb gained × Molar mass of Pb

The mass of Pb gained = 0.00184 × 207.2 = 0.38 g ≈ 0.4 g.

Amount of Pb gained = 0.43 g ≈ 0.4 g

Answer:

anticyclone

Explanation:

Answer:

There are 2.41 x 1019 molecules of Freon-12 in this sample and there is 0.00284 grams of chlorine in this sample.

The mass of chlorine in 5.56 mg of Freon 12 is 2.41 x 10¹⁹ molecules

Mass is the quantity of matter in a physical body. The product of the molar mass of the compound and the moles of the substance are defined as mass.

Chlorine is a chemical element. It is a gas and a chemical element and has an atomic number of 17.

Given the mass of chlorine is 5.56 mg

The molar mass of chlorine is 35.453

First, we will calculate the number of moles, then the mass of chlorine in 5.56 mg of freon-12

1 x 12g/mol

2 x  35.5g/mol

2 x 19g/mol = 121g/mol

Where the three molar masses I found were from Carbon, Chlorine, and Fluorine respectively.

4.43 mg Freon-12

1g / 1000 mg

1mol / 121g

6.02 x 10²³ molecules / 1mol = 2.41 x 10¹⁹ molecules

Thus, the mass of chlorine is 2.41 x 10¹⁹ molecules.

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Answer:

The combustion will release -3,321 KJ/mol of energy

Explanation:

What we need to do here is to first calculate the number of moles of methane burnt.

Mathematically, the number of moles of methane burnt = mass of methane/molar mass of methane

Molar mass of methane = 16g /mol

Thus the

number of moles will be ;

59.7/16 = 3.73 moles

Now, 1 mole of methane produces -890 KJ/mol if energy

Then the energy produced by by 3.73 moles of methane would be 3.73 * 890 = -3,320.8125

which is approximately -3,321 KJ/mol

Kindly note that the amount of heat is negative because it is an exothermic reaction

C. Walking on wet floors shows that Friction is undesirable

The pH of common solutions like bleach, shampoo, vinegar, and mouthwash as determined using pH test strips or a pH meter are as follows:

The pH of a solution is a measure of its acidity or alkalinity as determined by the concentration of hydrogen ions in the solution.

The pH scale ranges from 0 to 14, where pH 7 is considered neutral, pH values below 7 indicate acidity, and pH values above 7 indicate alkalinity.

The pH of a solution can be determined using various methods such as pH indicator papers or meters that produce color changes or give out readings of pH values.

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Answer:

Explanation: Analog signal is continuous in nature as it is well defined for every specific time. More specifically, it is the one defined continuously for a range of values with time. These are represented as a sinusoidal waveform. The figure below represents an analog signal:

analog signal

As we can see here that the signal is continuous in nature as its every value is specified for each particular interval of time, thus, is referred as the continuous-time signal. For the purpose of recording the analog signals, the actual signal must be preserved as only in that case we can record the accurate analog signal.

However, whenever in any application there arises a need to change an analog signal into a digital one then through sampling this can be achieved. In the sampling technique, this signal is sampled at certain fixed time intervals and the sampled voltage is converted into digital values.

Definition of Digital Signal

A type of signal which is non-continuous in nature as it is defined only for a set of discrete times is known as a digital signal. More simply, we can say, it is specified at some particular time instants only. Thus, here the information is represented as a set of discrete values. The figure given below shows the signal representation in digital form:

digital signal

Here it is clear that the data is discretely positioned in time axis thus is shown in the form of bits i.e., 0 and 1. This means that here the signal performs the sudden transition between 0 and 1 where these two values correspond to the two voltage levels. For the purpose of recording the signals, in the digital one, only the samples of the actual signal are taken and not the whole signal.

Key Differences Between Analog and Digital Signal

Analog and digital signals are differentiated mainly on the basis of their way to carry the information. Analog signals represent the information as a continuous function of time. As against, digital signals are represented discretely at specific time intervals.

Analog signals deteriorate more easily than digital one as their susceptibility towards noise is higher.

The devices that operate on an analog signal need more power for transmission and reception than the devices that work on the digital signal.

The information represented by the analog signal is comparatively more accurate than the digital signal due to its continuous range of values.

Analog signals are transmitted at a slower rate than digital signals as the information holds more values thus is precise.

An analog signal is defined by the amplitude, phase, frequency, etc. While the digital signal is mainly associated with bit rate, bit intervals, etc.

The sinusoidal representation of the analog signal makes it difficult to understand or get decoded thus encryption is not required in analog signals. But as the digital signals are in the form of square waves, thus, it can be decoded easily hence need to be encrypted for secured communication.

On the basis of processing, it is said that the continuous nature of the signal offers easy processing of the analog signal. However, the discrete nature of the signal offers difficultly in the processing of the digital signal.

Conclusion

Thus, the above discussion concludes that due to the way of representing the signal, the two are differentiated. And because of this, the two types of signals possess different properties and are used in different applications. Like analog signals are used in radio wave transmission and reception whereas digital signals are used in the field of digital electronics.

Answer:

true

Explanation:

A polyatomic ions is the combination of same kind or different kind of elements with a single charge as a whole . Hence, the statement is true.

What is a polyatomic ions?

A polyatomic ions is a group of elements joined together and possess a single charge as a whole. For example NH₄+. Here, nitrogen with four hydrogens forms a covalent bond with one unit of positive charge as a whole remains.

Polyatomic ions either three or more contains same or different kinds of elements. In the case of CO₃²⁻ , the carbonate ion contains 4 atoms and 2 units of negative charge which is possessed by the whole group.

Similarly, NO₃⁻, SO₄²⁻ etc are other examples of polyatomic ions. They are formed by gaining or losing electrons from their acidic or basic forms. Therefore, the statement is true.

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Secondary amine is what it is. Option (B3-dimethylbutan-2-amine )'s is the primary organic product created during the following reaction. Thus, if more hydrogen is added to carbon, we will obtain the main product, according to the Markovnikov Rule.

As a result, the main product produced by adding hydrogen to carbon-1, which has a higher concentration of hydrogen, and adding bromine to carbon-2 is 2-bromopropane. When a reaction follows Markovnikov's rule, a chemical or product is said to be a major organic product. The tertiary alkyl iodide is the largest byproduct of the second process, which transforms alcohol into alkyl iodide, while the secondary alkyl iodide is the minor byproduct.

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Green plants absorb sunlight with a frequency of approximately 4.67 x 10^14 Hz to power photosynthesis.

To calculate the frequency of sunlight with a wavelength of 642 nm that is strongly absorbed by chlorophyll for photosynthesis, we'll need to use the following formula:

Frequency (ν) = Speed of light (c) / Wavelength (λ)

First, we'll convert the given wavelength from nanometers to meters:

1 nm = 1 x 10^(-9) m
642 nm = 642 x 10^(-9) m = 6.42 x 10^(-7) m

Now, we'll plug the values into the formula:

Speed of light (c) = 3.00 x 10^8 m/s
Wavelength (λ) = 6.42 x 10^(-7) m

Frequency (ν) = (3.00 x 10^8 m/s) / (6.42 x 10^(-7) m)

Frequency (ν) ≈ 4.67 x 10^14 Hz

So, green plants absorb sunlight with a frequency of approximately 4.67 x 10^14 Hz to power photosynthesis.

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Equation 4 is given as:pH = pKa + log ([A-]/[HA])Where pH is the negative log of the hydrogen ion concentration and pKa is the negative log of the acid dissociation constant. [A-] is the concentration of the conjugate base and [HA] is the concentration of the acid.

Using equation 4, the buffer capacity of water can be calculated using the following formula:

β = dC/dpH

where β is the buffer capacity, dC is the change in concentration of the acid or the base, and dpH is the change in pH per unit concentration.

To calculate the buffer capacity of water, we need to know the acid dissociation constant (Ka) of water. The Ka of water is 1.0 x 10-14 M at 25°C.

Therefore, the pKa of water is 14.0 at 25°C.We can assume that the concentration of water is constant, so the change in concentration of water (dC) is zero. Therefore,β = dC/dpH = 0/dpH = 0The buffer capacity of water is zero because water cannot act as a buffer since it is a neutral substance with no acid or base properties.Showing the work for Answer 14:β = dC/dpHwhere dC = 0 (since the concentration of water is constant) and dpH = 1Therefore,β = 0/1 = 0M/pHThe buffer capacity of water is zero M/pH.

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A diet low in sodium and favoring whole grains is called a heart-healthy diet.

A heart-healthy diet is one that is rich in nutrient-dense whole grains, lean proteins, and an abundance of fruits and vegetables. Foods that are high in salt, saturated fat, and added sugars should be avoided or limited as much as possible to minimize the risk of heart disease and stroke, which are the leading causes of death in the United States. In particular, consuming a low-sodium diet can help to lower blood pressure, reduce fluid buildup in the body, and decrease the risk of heart attack and stroke.

Additionally, eating whole grains has been shown to improve heart health by lowering cholesterol levels and reducing the risk of developing type 2 diabetes. Therefore, a heart-healthy diet is one that is low in salt, saturated fat, and added sugars, while being high in nutrient-dense whole grains, lean proteins, fruits, and vegetables.

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There is great relationship between the SI unit for volume and length because the base unit is same.

The base units of length and volume are linked to each other in the metric system because the unit of volume is cubic meters while on the other hand, the unit of length is meter. The unit of volume is three times of the unit of length. There is direct relationship between volume and length due to the similar of their base units. So volume and length are related to each other.

So we can conclude that there is great relationship between the SI unit for volume and length because the base unit is same.

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Answer:

reduces friction

Explanation:

Lubrication is a crucial element in the efficiency and life-expectancy of any rotating equipment. Lubrication (reduces friction) and allows moving machine parts to slide smoothly past each other.

Answer:

A chemical reaction in which an uncombined element replaces an element that is part of a compound is called a simple substitution reaction or simple displacement reaction.

Explanation:

A simple substitution reaction or simple displacement reaction, called single-displacement reaction, is a reaction in which an element of a compound is substituted by another element involved in the reaction. The starting materials are always pure elements and an aqueous compound. And a new pure aqueous compound and a different pure element are generated as products. The general form of a simple substitution reaction is:

AB + C → A +BC

where C and A are pure elements; C replaces A within compound AB to form a new co, placed CB and elementary A.

So, in a Single replacement reaction an uncombined element replaces an element.

A chemical reaction in which an uncombined element replaces an element that is part of a compound is called a simple substitution reaction or simple displacement reaction.

Answer:

9.370 x 10 to the 23 molecules

Explanation:

91.72/1 x 1 mole Co/58.933g x 6.02 x 10 to the 23/1 mole Co

Answer:

Explanation:

Mass 1 mole of CO

C = 12

O = 16

m = 28

Mols of 91.72 grams

m = given Mass / Molar Mass

m = 91.72 / 28

m = 3.28 mols

Molecules

1 mol of anything is 6.02 * 10^23 molecules (in this case)

3.28 mol of CO = x

1/3.28 = 6.02*10^23/x      Cross multiply

x = 3.28 * 6.02 * 10^23

x = 1.97 * 10^24

The concentration of ammonium ion in the given reaction is  0.734M. There are many types of molar (quantity) concentration, including normal  concentration as well as osmotic concentration.

Concentration in chemistry is calculated by dividing a constituent's abundance by the mixture's total volume. Weight concentration, molar concentration, integer concentration, or volume concentration are four different categories of mathematical description. Any type of chemical combination can be referred to by the term "concentration," however the solvents and solutes in solutions are most usually mentioned.

NH\(_4\)Cl(s) → \(NH_4^+\) (aq) + \(Cl^-\)(aq)

ΔGrxn, for the reaction is = –9.27 kJ/mole

ΔG°rxn = -7.74 kJ/mole

T = 250C = 298K

ΔGrxn = ΔG°rxn + RT(lnQ)

Q= e^ ((ΔGrxn - ΔG°rxn)/RT)

Q = e^(–9.27 kJ/mole – ( -7.74 kJ/mole)/8 .314 J/K·mole x 298K

Q = 0.53929

Q = [ \(NH_4^+\)][ \(Cl^-\)]

Q = x²

√Q = x

x = √0.53929

[NH4+] = 0.734M

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Answer: c

Explanation: the particles stay together but has some gain more heat they break apart.

Answer:

See explanation

Explanation:

1 - Physical change

2 - Mixture

3 - Liquid

4 - Physical Properties

5 - Physical change

6 - Chemical change

7 - Melting

8 - Equals

9 - Conservation of mass

10 - Physical Property

11 - Distillation

The use of sandpaper and brushes to remove the epidermis and portions of the dermis called a. dermabrasion

Dermabrasion is a cosmetic procedure that uses sandpaper or brushes to mechanically remove the outer layers of the skin, including the epidermis and portions of the dermis.

This process aims to improve the texture and appearance of the skin by promoting new skin cell growth and reducing the visibility of scars, wrinkles, and other skin imperfections. It is typically performed under local anesthesia and can be used to treat various skin conditions or as a preparation step for other cosmetic procedures.

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Mine tailings contain sulphide, which harms fish and other aquatic organisms.

Fish can swiftly perish from hydrogen sulfide's extreme toxicity. Fish that are exposed experience an increase in secondary bacterial, parasitic, and fungal infections as well as a possible premature demise. Water-life is harmed by hydrogen sulfide, a poisonous gas, especially when it is unionized. It might naturally occur at concentrations that are harmful to fish reproduction and survival (Colby and Smith, 1967). The materials left over after an ore is separated into its valuable and economically unviable components are known as tailings in the mining industry. The materials left over after an ore is separated into its valuable and economically unviable components are known as tailings in the mining industry.

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The kinetic energy is 0.5177 × 10⁻²¹ J more at 50°C compared to 25°C.

The average kinetic energy of a molecule is directly proportional to the absolute temperature of a gas.

KE = ( 3/2 ) ( R / Nₐ ) T

Where T is the temperature of the molecule, R is the gas constant, and Nₐ is Avogadro's number.

Now, R = 8.314 J/mol.K

Avogadro's number, Nₐ = 6.022 × 10²³ atoms/ mol

The average kinetic energy at 50° C is:

T = 50° C = 323 K

KE₁ = ( 3/2 ) × ( R / Nₐ ) × T₁

KE₁ = ( 3 × 8.314 × 323 ) / ( 2 × 6.022 × 10²³ )

KE₁ = 668.90 × 10⁻²³ J

KE₁ = 6.6890 × 10⁻²¹ J

The average kinetic energy at 25°C is:

KE₂ = ( 3/2 ) × ( R / Nₐ ) × T₂

KE₂ = ( 3 × 8.314 × 298 ) / ( 2 × 6.022 × 10²³ )

KE₂ = 617.13 × 10⁻²³ J

KE₂ = 6.1713 × 10⁻²¹ J

Now,

The average kinetic energy of the molecules at 50° C compared to 25° C is:

KE = KE₁ - KE₂

KE = 6.6890 × 10⁻²¹ - 6.1713 × 10⁻²¹

KE = 0.5177 × 10⁻²¹ J

Hence, the average kinetic energy is 0.5177 × 10⁻²¹ J more at 50° C compared to 25° C.

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To prepare 400 ml of a 3 mmol solution of EDTA, you will need approximately 0.447 grams of EDTA.

To prepare a 400 ml solution of EDTA with a concentration of 3 mmol/L, we need to calculate the amount of EDTA required in grams.

First, we need to convert the concentration from mmol/L to mol/L. Since 1 mmol is equal to 0.001 mol, the concentration becomes 0.003 mol/L.

Next, we multiply the concentration by the volume of the solution in liters to find the number of moles required. The volume is given as 400 ml, which is equivalent to 0.4 L.

Thus, the number of moles needed can be calculated as follows: 0.003 mol/L * 0.4 L = 0.0012 mol.

To convert moles to grams, we use the molecular weight of EDTA, which is given as 372.24 g/mol. Multiplying the number of moles by the molecular weight gives us the mass of EDTA required:

0.0012 mol * 372.24 g/mol = 0.446688 g.

Therefore, to prepare 400 ml of a 3 mmol solution of EDTA, you will need approximately 0.447 grams of EDTA.

In conclusion, you need approximately 0.447 grams of EDTA to prepare a 400 ml solution with a concentration of 3 mmol/L.

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Answer:

How do one confess feelings to her if he is introvert?

Answer:

conclusion

Explanation:

it can't be a hypothesis since tests are carried out to verify so it is not a theory

an introduction to an experiment only gives the basis of what we are investigating therefore nothing has been proven and the question is still unanswered

The overall takeaway of an experiment’s results is the conclusion. Hence, option C is correct.

A hypothesis is a testable statement about the relationship between two or more variables or a proposed explanation for some observed experiment.

The overall takeaway of an experiment’s results can't be a hypothesis since tests are carried out to verify so it is not a theory

An experiment only gives an idea about the investigation therefore nothing has been proven and the question is still unanswered.

Hence, the overall takeaway of an experiment’s results is the conclusion.

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Non polar: A bon in which neither atom takes more than its share of electrons

Metallic : A type of bond that allows valence electrons to move freely among its ions

Polar: A bond with a negative end and a positive end

Electronegativity: Determines what type of bond will form

Diatomic: Composed of two atoms