Anyone get this please help me, can you do it step by step please

Statement correctly describes a titration : A titration relies on a reaction that takes place in solution.

Basically, titration is a chemical method to determine the concentration of a solution. The trick is to react a solution in a certain volume with another solution whose concentration of the substance is known. This known solution is called a frozen solution. While the purpose of the titration itself is to determine the pH level of a chemical substance. The end point is when the indicator changes color.

This titration measurement usually uses several special tools, including a burette, stative, Erlenmeyer tube, rubber suction cup, watch glass, dropper pipette, measuring flask, and volume pipette. One of the conditions for the titration to run well is that it is characterized by a fast reaction, you can even use a catalyst to speed up the reaction. Furthermore, the reaction proceeds simply and the stoichiometric equation is clear. Then there are no side reactions that can affect the main reaction.

Based on the type, the titration is divided into four types. The three types are redox titrations, complexation titrations, and acid-base titrations and argentometry. For more details about these three types of titration, you can see in the following review.

Redox Titration

For this type of redox titration is a type of titration that processes with redox reactions. Redox in titration is still divided into three. Namely those that use I2 and are indirect titrations. This is because the reacted I2 is still made by the previous redox reaction. Meanwhile for the second type is iodometric titration which is used directly in I2 and can be called a direct reaction. The third type of redox is permanganometric where the reaction utilizes Mn2+ ions.

This type of complexation titration is actually a titration that uses complexation reactions and the formation of complex ions. Its use is usually to analyze metal levels. When you want to do a type titration there are several things to consider. This is more because the formation of complex ions is very specific under certain conditions.

The third type of titration is the acid-base titration. Actually, for this titration it refers more to a quantitative analysis method based on acid-base reactions. The indicators used are usually those that can profile the color change at a certain pH.

This last type is argentometric titration. This titration is a titration commonly used for precipitation reactions. Based on the principle of argentometric titration regarding solubility as well as the product constants of the reacting reagents. The method for Argentometric titration is divided into the Mohr method, the Volhard method, and the Fajans method.

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Answer:

1. Sulphuric acid

2. Car battery acid

3. Washing up liquid

4. Milk of magnesia

5. Metal polish

6. Oven cleaner

Explanation:

Universal paper can determine the pH of a solution. It ranges from dark red (pH 0 - very acidic) to orange/yellow, to green (pH 7 - neutral) to blue, dark blue and purple (pH 14 - very alkaline)

Sulphuric acid has the lowest pH as the universal indicator is red.

The next is car battery acid which is pink - not as acidic as red.

The next is washing up liquid, which is yellow, around pH 3 or 4.

The next is milk of magnesia with light blue, around pH 9 or 10.

Metal polish is dark blue - around pH 11.

Oven cleaner is the darkest, with purple.

The total time required for the decay is approximately 1416.0 hours, which is closest to the given option C. 1006.9 hours.

Option (C) is correct.

To calculate the number of half-lives required for the decay. The half-life of 140 Ba is given as 283.2 hours.

First, we calculate the fraction of the original amount remaining after each half-life. Since the half-life represents the time it takes for half of the substance to decay, the fraction remaining after each half-life is 1/2.

To find the number of half-lives required to decay from 35 mg to 1.0 mg, we can set up the following equation:

(35 mg) * (1/2)ⁿ = 1.0 mg

Where 'n' is the number of half-lives.

Now, let's solve for 'n':

(1/2)ⁿ = 1.0 mg / 35 mg

(1/2)ⁿ = 0.02857

To find 'n', we can take the logarithm (base 1/2) of both sides:

n = log base 1/2 (0.02857)

Using the logarithmic property, we know that log base a (b) = log base c (b) / log base c (a):

n = log (0.02857) / log (1/2)

Using a calculator, we can find:

n ≈ 4.243

Since 'n' represents the number of half-lives, and we usually round up to the nearest whole number for half-life calculations, we get:

n ≈ 5

Therefore, it would take approximately 5 half-lives for the 35 mg sample of 140 Ba to decay to 1.0 mg.

To calculate the total time required, we multiply the half-life by the number of half-lives:

Total time = 283.2 hours * 5

Total time ≈ 1416 hours

Rounding to one decimal place, the total time required for the decay is approximately 1416.0 hours, which is closest to the given option C. 1006.9 hours.

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We can analyze the relationship between the uncorrected dO (oxygen isotope) values and CO2 levels, as well as the corrected dashed black line values.

In terms of the uncorrected dO values, it is unclear how well they correspond with CO2 levels since the specific correlation or trend is not mentioned. Without further details or data, we cannot determine the exact relationship between the uncorrected dO values and CO2 levels.

However, regarding the corrected dashed black line values, we can observe their alignment with the horizontal dashed line at 0°C, which represents today's temperature. By assessing where the corrected values lie relative to this line, we can gain insights into temperature changes over time.

Based on the information provided, we cannot definitively conclude whether this argues for or against the notion that CO2 concentration is one of the main drivers of climate change. The given context focuses on comparing the dO values with CO2 levels and temperature, without explicitly addressing the relationship between CO2 concentration and climate change. To draw conclusions about the impact of CO2 concentration on climate change, further analysis and information about the specific trends and patterns are required.

Overall, without additional data and details, it is challenging to determine the exact correspondence between the uncorrected dO values and CO2 levels, as well as the implications for the role of CO2 concentration in climate change. Further examination of the provided paper and relevant scientific literature would provide a more comprehensive understanding of the topic.

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Answer:

option b is the correct answer

please mark me as brainlist

There is said to be a short circuit when one part of a parallel circuit has a very low resistance and almost all the current will flow through this part and very little current will flow through the other part.

Short circuit means when a normal wire comes in direct contact with another wire, then the resisitance value turns zero and flow of current is ebruptly increases.

So, if in any wire very little or no resistance is present and high amount of current will flow from that wire then in this case short circuit occur. It generally occurs in the parallel circuit because in the closed circuit that much of current flow is not present that cause short circuit.

Hence option (B) is correct.

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Answer: T = 9.74°C

Explanation: An ideal gas in a quasi-static adiabatic process follows the equation: \(pV^{\gamma} = constant\).

So:

\(1.10^{1.67} = constant\)

constant = 46.7735

Adiabatic conditions can be written as:

\(TV^{\gamma-1}=constant\)

Then, new temperature is

\(T.(10.4)^{1.67-1}=46.7735\)

\(T.(10.4)^{0.67}=46.7735\)

\(T = \frac{46.7735}{4.802}\)

T = 9.74°C

The new temperature is 9.74°C.

The pressure will be 7.53bar

According to Boyle's law, He gave the relation between pressure and temperature.

P1V1=P2V2

Where, P is pressure and V is volume.

As,

P1= 196.0L

V1 = 1.00bar

V2= 26.0L

Now,

P2=?

P1V1=P2V2

196*1=26*P2

P2= 196/26

P2=7.53bar

Therefore, pressure is required to compress 196.0 liters of air at 1.00 atm is 7.53bar

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The statement "molecules move in random directions when heated in a heat engine, and because of the lack of uniformity in the direction of molecular movement" is true.

When a heat engine is heated, molecules absorb heat energy and their kinetic energy increases. The kinetic energy of molecules causes them to move around. However, this movement is not uniform, and the molecules move in random directions.

A heat engine is a device that converts thermal energy into mechanical energy. Heat engines operate on the principle of thermodynamics.

They work by taking in thermal energy from a high-temperature reservoir, converting some of it into mechanical energy, and then releasing the remaining thermal energy to a low-temperature reservoir.The internal combustion engine in a car, the steam engine in an old locomotive, and the turbine in a power plant are all examples of heat engines. They all convert heat energy into mechanical energy to perform work.

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(C) 320 g

Explanation:

A = A02^(-t/hl)

where hl = half-life

A0 = original amount

A = present amount

t = elapsed time = 5 half-lives

10g = A02^(-5) = A0/32

A0 = 32×(10 g) = 320 g

answer :

this is the structure if you want it

7.77 × 10^(-4) in standard notation is 0.000777.

To convert a number from scientific notation to standard notation, we need to multiply the coefficient (7.77) by the power of 10 (-4). In this case, the given number is 7.77 × 10^(-4).

To convert it to standard notation, we need to move the decimal point to the left or right based on the exponent of 10. Since the exponent is negative (-4), we move the decimal point four places to the left.

Starting with the number 7.77, we move the decimal point four places to the left:

7.77 → 0.000777

Therefore, 7.77 × 10^(-4) in standard notation is 0.000777.

In standard notation, we express the number without any exponent or power of 10. It is a way to represent the number in a more conventional format, where the decimal point is placed in relation to the significant digits of the number.

Remember to correctly place the decimal point when converting between scientific notation and standard notation, considering the positive or negative exponent of 10.

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Answer:

Student 2. Sugar dissolves the fastest in hot liquids, which means immediately stirring it in a hot liquid and THEN adding a colder one will yield the best results.

Explanation:

This is actually how I was always taught to make sweet tea.

The molecular mass of the unknown gas is approximately 43.6 g/mol.

To determine the molecular mass of the unknown gas, we can use the ideal gas law equation: PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature in Kelvin.

First, let's convert the given mass of the gas to moles. The molar mass (M) of a substance is defined as the mass of one mole of that substance. Therefore, the number of moles (n) can be calculated using the formula n = m/M, where m is the mass of the sample and M is the molecular mass of the gas.

Given that the mass of the sample is 23.3g and the volume is 12.01 L, we can use the ideal gas law to calculate the number of moles:

PV = nRT

n = PV / RT

Plugging in the values:

n = (12.01 L) × (1 atm) / [(0.0821 L·atm/(mol·K)) × (273.15 K)]

Simplifying the equation:

n = (12.01 L) × (1 atm) / (22.41 L·atm/(mol·K))

n = 0.535 mol

Now, we can calculate the molecular mass (M):

M = m / n

M = 23.3g / 0.535 mol

M ≈ 43.6 g/mol

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Answer: A. H 0  μ1 = μ2 = μ3

Ha  μ1 ≠ 2μ ≠ μ3

2. Test Statistics is 95%

3. Critical F-Value is 3.76.

4. P-Value is 2.32.

5. Conclusion  Reject the null hypothesis.

6. Type of vehicle does effect the amount of green house gas emissions.

The correct order of the steps of a hypothesis test is given below.

1. Determine the null and alternative hypothesis.

2. Select a sample and compute the critical value F-test for the sample mean.

3. Determine the probability at which you will conclude that the sample outcome is very unlikely.

4. Make a decision about the unknown population.

All steps are performed in the given sequence to test a hypothesis.

The null hypothesis is rejected or accepted on the basis of level of significance. When the p-value is greater than level of significance we fail to reject the null hypothesis and null hypothesis is then accepted. It is not necessary that all null hypothesis will be rejected at 95% level of significance. To determine the criteria for accepting or rejecting a null hypothesis we should also consider p-value.

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Explanation:

Answer: Kinetic energy into heat energy.

Explanation:

We know that they temperature of the metal sheet increases, this means that there is heat energy. When the hammer strikes the metal sheet, this is known as kinetic energy, because it is striking.

Thus, the only option is kinetic into heat energy.

Eighty Billion Years

Answer:

H2

Explanation:

Calculate using the Avogadro's number

We have found that \(H_2\) (10 grams) contains the greatest number of hydrogen atoms.

The molar mass for every substance i:

We find the Number of moles of each substance as well

= mass (g) / molar mass (g/mol)

Number of moles = 10 g / 16.05 g/mol

Number of moles[= 0.623 moles

Number of moles = 10 g / 36.46 g/mol

Number of moles =  0.274 moles

Number of moles = 10 g / 2.02 g/mol

Number of moles =  4.95 moles

Number of moles = 10 g / 33.02 g/mol

Number of moles  =  0.303 moles

Now, let's consider the stoichiometry to determine the number of hydrogen atoms in each substance:

For \(CH_4\), there is 1 hydrogen atom per molecule.

For HCl, there is 1 hydrogen atom per molecule.

For \(H_2\), there are 2 hydrogen atoms per molecule.

For \(PH_3\), there are 3 hydrogen atoms per molecule.

We then find the total hydrogen atom in each substance and compare with other each other.

\(H_2\)  has the greatest number of hydrogen atoms,.

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\(\qquad \qquad\huge \underline{\boxed{\sf Answer}}\)

Here's the balanced equation for given Double displacement reaction ~

\( \sf Pb(NO_3)_2 +2 \: KI = PbI_2 +2 \: KNO_3\)

The products fored are : Lead Iodide ( PbI2 ) and Potassium Nitrate ( KNO3 )

\(\\ \rm\Rrightarrow Pb(NO_3)_2+2KI\longrightarrow 2KNO_3+PbI_2\)

On both sides

Answer:

Explanation:

Explanation: NA,Avogadro's number specifies 6.0221×1023 individual particles. It is simply another collective number like a dozen, or a score, or a gross. NA has the property that 6.0221×1023 individual cobalt atoms has a mass of 58.93⋅g

Answer:

6.0221×1023

Explanation:

Answer:

2Al + 3H2SO4 → Al2(SO4)3 + 3H2

2Fe + 3Cl2 → 2FeCl3

Explanation:

1. (SO4) 3 you see this 3 it means that 3 must be behind H2SO4. So now it's 3H2SO4.

2. If 3 is now behind one H2, it must be behind the other.

So now it's 3H2.

3. Al2 (SO4) 3 has 2 ahead of Al which means there will be 2Al in the reactants.

1. FeCl3 has 3 ahead of Cl, and Cl2 has 2. Which means that behind FeCl3 goes 2, and behind Cl2 goes 3 so now we have equated all Cl.

2. Since it is now 2FeCl3, we know that there must be 2 in the second Fe. It's 2Fe now.

The option which gives the correct mole ratios is H₂S : SO₂ = 2 : 2 and O₂ : H₂O = 3 : 2

It is a conversion factor between compounds in a chemical reaction, that is derived from the coefficients of the compounds in a balanced equation

Molar ratio also known as stoichiometry is the ratio in which the reactants and products are either formed or reacted in the given equation

The balanced equation for given reaction is as follows ;

2H₂S + 3O₂ --> 2SO₂ + 2H₂O

Molar ratio can be determined by the coefficients of the compounds in the balanced reaction

Coefficient is the number in front of the chemical compound and they are as follows

Therefore, correct option is H₂S : SO₂ = 2 : 2 and O₂ : H₂O = 3 : 2

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Even though the maximum absorbance of permanganate anion occurs in the yellow region, its characteristic purple colour is a result of the selective absorption and transmission of light in the visible spectrum.

The phenomenon observed with the permanganate anion, where its maximum absorbance occurs in the yellow region of the visible spectrum but it appears purple in colour, can be explained by complementary colours and selective absorption.

The colour we perceive is a result of the wavelengths of light that are absorbed by a substance and the wavelengths that are transmitted or reflected. In the case of the permanganate anion, it absorbs light most strongly in the yellow region, around 550-580 nm. This means that the yellow light is absorbed, resulting in a decrease in intensity in that region.

However, the colour we see is not solely determined by the wavelengths that are absorbed, but also by the wavelengths that are transmitted or reflected. In this case, the permanganate anion still transmits or reflects a significant amount of light in the blue and red regions of the spectrum. Our eyes perceive the combination of these transmitted or reflected wavelengths as purple.

Therefore, even though the maximum absorbance of permanganate anion occurs in the yellow region, its characteristic purple colour is a result of the selective absorption and transmission of light in the visible spectrum.

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In this instance, the equilibrium concentration of Cu⁺ with 0.10 M Br⁻ is similarly 0.10 M.

To determine the concentration of Cu⁺ in equilibrium with CuBr(s) and 0.10 M Br⁻, we need to consider the solubility equilibrium of CuBr.

The solubility equilibrium for CuBr can be represented as follows:

CuBr(s) ⇌ Cu⁺(aq) + Br⁻(aq)

The solubility product constant (Ksp) expression for this equilibrium is:

Ksp = [Cu⁺][Br⁻]

Since the stoichiometry of the reaction is 1:1 between Cu⁺ and Br⁻, the concentration of Cu⁺ in equilibrium will be equal to the concentration of Br⁻.

Therefore, in this case, the concentration of Cu⁺ in equilibrium with 0.10 M Br⁻ is also 0.10 M.

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The concentration of Cu+ in equilibrium with solid CuBr and 0.10M Br- is 7.9 x 10-5 M. This happens due to the common ion effect, which is the presence of extra Br- ions in solution that suppress the dissolution of CuBr.

You are asked to find the concentration of Cu+ in equilibrium with solid CuBr and 0.10M Br-. The solubility product constant (Ksp) defines the equilibrium between a solid and its constituent ions in a solution. The balanced equation for this dissolution process is:

CuBr(s) <==> Cu+ (aq) + Br- (aq)

For CuBr, the Ksp value is 7.9 x 10-5 M. This represents product of concentrations of its ions in the solution. However, we already have 0.10M Br-, which is much higher than that provided by the dissolution of CuBr. Therefore, the Cu+ concentration in equilibrium is essentially equal to the Ksp, i.e. 7.9 x 10-5 M.

Here, the concept of the common ion effect comes into play. The presence of extra Br- ions from the solution suppresses the dissolution of CuBr, thereby controlling the Cu+ concentration in the solution.

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D: radon-219

Radium-223, when it undergoes alpha decay, produces radon-219 as another product.

Radium-223 undergoes alpha decay and produces radon-219 (as well as a few other particles).

An alpha particle contains two protons and two neutrons.

As a result, when an alpha particle is emitted, the atomic number of the radium-223 (which is 88) reduces by two, and the mass number (which is 223) decreases by four.

This suggests that radium-223 transforms into an element with atomic number 86 (which is radon-219) after alpha decay.

Furthermore, radium-223 decays into another radionuclide, actinium-227, through a series of decays.

The half-life of radium-223 is 11.43 days.

This means that the time it takes for half of the radium-223 to decay to radon-219 is 11.43 days.

After an additional 3.05 minutes, radon-219 undergoes alpha decay to produce polonium-215, which also decays via alpha emission to yield lead-211, which is a stable element.

Note: Mass number is the sum of protons and neutrons, while atomic number is the number of protons in the nucleus of an atom.

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Answer:

The value is   \(k = 2 \ ppb\)

Explanation:

From the question we are told that

   The volume of the drinking water is  \(V = 500 \ mL = 500 *10^{-3} \ L = 500 *10^{-6} \ m^3\)

   The mass of  mercury it contains  \(m_c = 0.001 \ mg = 0.001 *10^{-3} \ g = 0.001 *10^{-6}\ kg\)

Generally the mass of water is mathematically represented as

       \(m = V * \rho\)

Here \(\rho\) is the  density of water with value  \(\rho = 1000 \ kg/m^3\)

So

       \(m = 500 *10^{-6 }* 1000\)

=>    \(m = 0.5 \ kg\)

Generally  ppb mean part per billon ,  and  1 billon is  100,000,000

So the part per billon which this represents is mathematically represented as

        \(k = \frac{0.001 *10^{-6}}{ 0.5} * 100 000 000\)

=>     \(k = 2 \ ppb\)

Answer:

2 ppb

Explanation:

I got it right in class!

Hope this Helps!! :))

Answer:

A change in pressure at any point in an enclosed fluid at rest is transmitted undiminished to all points in the fluid. With that said; in a hydraulic brake system, if the piston in the master cylinder(the part your foot pushes on) is one inch square area and you push with 100 pounds, then 100 pounds per square inch is transmitted to all parts of the hydraulic system. Now if the brake caliper piston(the part that pushes against the brake pad) is 2 square inches then there will be a total of 200 lbs of force being applied by the wheel cylinder, because each square inch has 100 pounds pushing on it. This is basically how cars brake systems are designed in order to reduce the amount of force required by the driver.

Btw if u want to give 67 points u must multiply that by 2 since two people answer and they get half of 67.    Im still happy with my 34 though!

Answer:

Cooffee

Explanation:

the answer is coffee because coffee might be bitter

Answer:Coffee

Explanation:Water is neutral, while the other answers are mostly organic acids but salt water is neither acidic nor basic