A cylinder measuring 7.2 cm wide and 8.7 cm high is filled with gas and the piston pushed down with a steady force. Calculate the force on the piston if the pressure in the gas is measured to be 617. kPa. Write your answer in units of kilonewtons. Round your answer to 2 significant digits.

In an acid-base neutralization titration, where the end point is a neutral solution, the unknown concentration of the receiving solution can be calculated because the concentration of he acid solution must match the concentration of the basic solution

Neutralization is a chemical reaction where an acid and a base react with each other in equimolar amount and acid base neutralization titration is based on acid base in quantitatively measurement and that's why it is called as acid base neutralization titration

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Answer:

From the image the answer is 24.

Answer:

24

Explanation:

thats from the image and every little line is 2 degrees Celsius and its 2 tiny lines away from 20

To calculate the concentration of the iron sample by using a spectrophotometric method, it is necessary to dilute the sample. The volume to which the sample should be diluted is a crucial question in achieving the most accurate result.

The process involves diluting the sample, and the concentration must be calculated to determine the precise result of the dilution. This question can be answered by calculating the uncertainty and identifying the value of the uncertainty. The value with the lowest uncertainty will be the best value to choose. The volume with the lowest uncertainty will be the ideal volume to dilute the 5 ml aliquot of the iron sample to achieve a result with the minimum level of uncertainty.
To determine the optimal volume for dilution, the uncertainty should be calculated.
This can be done by using the equation for propagation of uncertainty, which states that the uncertainty of the result is equal to the square root of the sum of the squares of the uncertainties of the individual components. When calculating the uncertainty of the diluted sample, the uncertainty of the initial sample and the uncertainty of the diluent must be considered. The uncertainty of the initial sample can be calculated using the calibration curve. As the expected iron content is 40-60%, the concentration of the sample is expected to be 8-12 ppm. The uncertainty of the calibration curve is given by the standard deviation of the calibration standards.
The diluent has a negligible uncertainty. The uncertainty of the diluted sample will be lower if a larger volume is used for dilution because the relative contribution of the uncertainty of the initial sample will decrease. However, the uncertainty of the measurement will increase if the sample is diluted too much because the concentration of the analyte will be too low to be detected accurately. A 100 mL volume is a good choice because it balances the need for sufficient dilution to reduce the uncertainty of the initial sample with the need for sufficient concentration to allow for accurate detection of the analyte.

The volume of the sample that should be diluted is 5 ml. The minimum level of uncertainty is obtained at a dilution of 100 ml. When the volume of the diluent is greater than 100 ml, the uncertainty of the measurement increases, and when the volume of the diluent is less than 100 ml, the uncertainty of the measurement also increases. Thus, a 100 ml volume of diluent is the ideal volume to minimize the uncertainty in the analysis of iron.

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The compounds BaO, Fe₂O₃, ZnO, they all are ionic compounds.

Ionic compounds are compounds made up of positive and negative ions. Electrostatic forces hold them together. The following elements commonly form ionic compounds: nonmetals and metals, polyatomic ions, and transition metals.

Covalent compounds are compounds made up of two or more non-metallic elements. They join together by sharing electrons to achieve a stable electron configuration

BaO: Ba is a metal, while O is a nonmetal, therefore it's an ionic compound

Fe2O3: Fe is a metal, while O is a nonmetal, therefore it's an ionic compound

ZnO: Zn is a metal, while O is a nonmetal, therefore it's an ionic compound

Thus, all of the above compounds i.e. BaO, Fe₂O₃, ZnO are ionic compounds.

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Answer:

we can connect it by velocity measurement because the choice of reference is related to speed  and velocity measurements

Explanation:

The moles of CO2 are in the tank is mathematically given as

n=1.431

Question Parameters:

A 10-liter tank of CO2 is at a pressure of 3.5 atm and a temperature of

25°C.

Generally, the equation for the ideal gas  is mathematically given as

PV=nRT

Therefore

n=PV/RT

n=354.638kpa*10/8.314 J/mol·K *298k

n=1.431

In conclusion,  moles of CO2 is in the tank is

n=1.431

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Answer: liquid water 2

Explanation:

Answer:

i believe it's D

Explanation:

Answer:

D

Explanation:

Answer:

Fundamental properties of atoms including atomic number and atomic mass. The atomic number is the number of protons in an atom, and isotopes have the same atomic number but differ in the number of neutrons.

Explanation:

Fundamental properties of atoms including atomic number and atomic mass. The atomic number is the number of protons in an atom, and isotopes have the same atomic number but differ in the number of neutrons.

Answer:

The moon is closer to earth

Explanation:

Around each new moon and full moon, the sun, Earth, and moon arrange themselves more or less along a line in space. Then the pull on the tides increases, because the gravity of the sun reinforces the moon's gravity. ... Thus, at new moon or full moon, the tide's range is at its maximum.

Answer:

7

Explanation:

Answer:

7

Explanation:

The significant figures are: 1,0,0,0,0,2,1

Remember the rules is

1. Non-digits are always significant.

2. Any zeros between two significant digits are significant.

3. A final zero or trailing zeros in the decimal portion only are significant

Those are three rules you have to follow in order to see how many significant figures there are in 10,000,210.

So I’m guessing 7 is the answer

Therefore the answer is 7.

Hope this helps! :)

Brainliest would be highly appreciated! Thanks! :)

Answer:

380

Explanation:

I couldn't find the answer anywhere so this is the correct answer. I got it graded.

44.95591 atomic mass units

Have a Merry Christmas!

Answer: what is this give more esplanation

Explanation:

The forces of attraction that are present or exist between molecules of \(CH_2F_2\)  are as follows:

The force of attraction may be defined as a type of property that pulls the body towards its surface. It is the one through which atoms in molecules or elements are held together with different characteristics on the basis of their structure and functions.

It is known that fluorine has a higher electronegativity than carbon atoms. This difference in electronegativity is responsible for constructing a polar molecule. This significantly illustrates dipole-dipole interaction. It also demonstrates London-dispersion force which refers to the force between atoms and molecules.

It is a mechanism that overall represents the characteristics of each and every element specifically. The force of attraction governs the stability and functionality of the element and molecule as well.

Therefore, The forces of attraction that are present or exist between molecules of \(CH_2F_2\)  are Dipole-dipole interaction, Hydrogen bonding, and the London Dispersion forces.

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Answer:

C. heat from the water moving through the cooler air  

I think it's C because when something cools down, it has to reach a point of thermal equilibrium with the matter (in this case air) around it. So heat transfer happens through convection from the heat in the pan to the cooler surrounding air. The heated air becomes less dense and rises, while cooler air, sinks to the surface of the water, gets heated, and rises. This convection cycle keeps happening until the water in the pan is around the same temperature with the air around it.

The difference in degrees Fahrenheit between the maximum expected temperatures by the end of the century between the lower and higher emissions scenarios can vary depending on various factors and assumptions.

However, in general, the lower emissions scenario is expected to result in a lower increase in global temperatures compared to the higher emissions scenario.

This means that the maximum expected temperature rise by the end of the century under the lower emissions scenario would be lower than that of the higher emissions scenario.

The specific temperature difference would depend on the specific projections and models used, but it highlights the significant impact that emissions reductions can have on mitigating future temperature increases.

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Answer:

1024

Explanation:

Each cell division splits one cell into two, so 1=2   2=4   4=8   8=16   16=32   32=64   64=128   128=256   256=512   512=1024. Therefore, your answer is 1,024.

To find out the pH of a solution prepared by mixing 500. mL of 0.10 M NaOCl and 500. mL of 0.13 M HOCl, the given information is,Volume of NaOCl, V1 = 500 mL = 0.5 LV1 = 500 mL = 0.5 LVolume of HOCl, V2 = 500 mL = 0.5 LV2 = 500 mL = 0.5 LMolarity of NaOCl, M1 = 0.10 MM1 = 0.10 MMolarity of HOCl, M2 = 0.13 MM2 = 0.13 M

The number of moles of NaOCl = M1 × V1 = 0.10 M × 0.5 L = 0.05 molThe number of moles of HOCl = M2 × V2 = 0.13 M × 0.5 L = 0.065 molFrom the balanced chemical equation for the reaction between NaOCl and HOCl, we get:NaOCl(aq) + HOCl(aq) ⟶ H2O(l) + Na+(aq) + OCl–(aq)The concentration of OCl– can be calculated as:OCl–(aq) = the concentration of NaOCl(aq) = 0.10 M [NaOCl is a salt and it will dissociate into its respective ions, Na+ and OCl–]The concentration of HOCl(aq) can be calculated as:HOCl(aq) = M2 – OCl–(aq) = 0.13 – 0.10 = 0.03 MOCl–(aq) acts as a base while HOCl(aq) acts as an acid. The base and acid reaction is given as:OCl–(aq) + H2O(l) ⇌ HOCl(aq) + OH–(aq)The value of K2 for the above reaction is given as:K2(HOCl) = 3.2 × 10⁻⁸The concentration of hydroxide ion can be calculated as follows:[OH–]²/[HOCl] = K2(HOCl)or [OH–]² = K2(HOCl) × [HOCl] = 3.2 × 10⁻⁸ × 0.03[OH–]² = 9.6 × 10⁻¹⁰[OH–] = √(9.6 × 10⁻¹⁰) = 3.10 × 10⁻⁵ MNow, the concentration of hydrogen ion can be calculated as follows:Kw = [H⁺] × [OH⁻]or 1 × 10⁻¹⁴ = [H⁺] × (3.10 × 10⁻⁵)or [H⁺] = 1 × 10⁻¹⁴/3.10 × 10⁻⁵[H⁺] = 3.22 × 10⁻¹⁰ MTherefore, pH of the solution prepared by mixing 500. mL of 0.10 M NaOCl and 500. mL of 0.13 M HOCl is:pH = -log[H⁺] = -log(3.22 × 10⁻¹⁰) = 9.49Therefore, the pH of the solution prepared by mixing 500. mL of 0.10 M NaOCl and 500. mL of 0.13 M HOCl is 9.49 (2 decimal places).

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As per the given data, the specific heat of the copper sample is approximately 0.384 J/g·°C.

For the specific heat of copper, we can use the formula:

q = mcΔT

Given that:

Mass of copper (m) = 5g

Change in temperature (ΔT) = 50°C - 10°C = 40°C

Heat absorbed (q) = 76.8 J

76.8 J = 5g × c × 40°C

76.8 J = 200g°C × c

c = 76.8 J / 200g°C

c ≈ 0.384 J/g·°C

Thus, the specific heat of the copper sample is approximately 0.384 J/g·°C.

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MgO > CaO > NaF > KCl are the following compounds with decreasing order of lattice energy.

With the help of the people success platform Lattice, leaders can create motivated, cohesive team that foster winning cultures. Launching 360-degree performance review cycles, engagement polls, tracking OKR/goals, getting real-time feedback, and promoting manager 1-on-1 meetings are all made simple with Lattice.

Any orderly configuration of points and objects over a region or in space, such as the geometric configuration of the atoms within a crystal. Fissionable material is arranged geometrically in a nuclear reactor and is also referred to as a "space lattice."

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Answer:

a is write

Explanation:

Why are all ionic compounds crystalline in structure?

Ionic compounds are generally hard, but brittle. ... The repulsive forces between like-charged ions cause the crystal to shatter. When an ionic crystal breaks, it tends to do so along smooth planes because of the regular arrangement of the ions.

Answer:

the answer is the number three

Answer: the right answer is 1,4&5

Answer:

they won

Explanation:

The melting of 1 mole of NaCl(s) is spontaneous at 500°C but not at 700°C.

To determine the spontaneity of the melting process at each temperature, we need to calculate the change in Gibbs free energy (ΔG) using the equation:

ΔG = ΔH - TΔS

S°NaCl(s) = 72.11 J/mol K

S°NaCl(l) = 95.06 J/mol K

ΔH°fusion = 27.95 kJ/mol

At 500°C (773 K):

ΔS = S°NaCl(l) - S°NaCl(s) = 95.06 J/mol K - 72.11 J/mol K = 22.95 J/mol K

ΔG = ΔH°fusion - TΔS = 27.95 kJ/mol - (773 K)(22.95 J/mol K) = 27.95 kJ/mol - 17.78 kJ/mol = 10.17 kJ/mol

Since ΔG is positive (10.17 kJ/mol > 0), the melting of NaCl(s) is non-spontaneous at 500°C.

At 700°C (973 K):

ΔS = S°NaCl(l) - S°NaCl(s) = 95.06 J/mol K - 72.11 J/mol K = 22.95 J/mol K

ΔG = ΔH°fusion - TΔS = 27.95 kJ/mol - (973 K)(22.95 J/mol K) = 27.95 kJ/mol - 22.33 kJ/mol = 5.62 kJ/mol

Since ΔG is still positive (5.62 kJ/mol > 0), the melting of NaCl(s) is also non-spontaneous at 700°C.

Therefore, the melting of 1 mole of NaCl(s) is spontaneous at 500°C but not at 700°C. The positive values of ΔG indicate that the process is non-spontaneous at both temperatures, meaning that energy input would be required for the solid NaCl to melt.

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Answer:

Diffusion and Dispersion.

Explanation:

The two processes that took place in the given experiment are Diffusion and Dispersion.

When a crystal of potassium magnet is added placed in the bottom of a beaker which contains cold water, after 5 minutes the particles of potassium magnet will diffuse with water through diffusion process and the colour of water turns purple.

After few hours, the colour of solution goes light purple because the tiny particles which were diffused earlier will dispersed in the water and the particles will spread and make the solution lighter in colour.

Hence, the two processes are Diffusion and Dispersion.

a. Molten KCl: The products formed are elemental potassium (K) at the cathode and chlorine gas (\(Cl_2\)) at the anode.

b. Aqueous KCl: The products formed are hydrogen gas (\(H_2\)) or potassium (K) at the cathode, chlorine gas (\(Cl_2\)) at the anode, and potassium hydroxide (KOH) if water is present in the solution.

a. When molten KCl (potassium chloride) is electrolyzed with inert electrodes, the products formed are potassium (K) metal and chlorine (Cl₂) gas. The overall reaction can be represented as:

2KCl (l) -> 2K (l) + Cl₂ (g)

In this case, the electrolysis of molten KCl results in the decomposition of the compound into its elements, with potassium being reduced at the cathode (negative electrode) and chlorine being oxidized at the anode (positive electrode).

b. When aqueous KCl (potassium chloride) is electrolyzed with inert electrodes, the products formed are hydrogen (H₂) gas and chlorine (Cl₂) gas. The overall reaction can be represented as:

2H₂O (l) -> 2H₂ (g) + O₂ (g)

However, since the electrolyte is KCl, the presence of chloride ions (Cl⁻) allows for another reaction to occur:

2Cl⁻ (aq) -> Cl₂ (g) + 2e⁻

Hence, the resulting products are hydrogen gas evolving at the cathode and chlorine gas evolving at the anode. The reduction of hydrogen ions (H⁺) to form hydrogen gas is preferred over the reduction of potassium ions (K⁺), while the oxidation of chloride ions (Cl⁻) to form chlorine gas occurs at the anode.

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According to the reaction, when 355 ml of 1.65 m Hydrochloric acid solution are combined with too much aluminum, 26.03 g of aluminum chloride is created.

An inorganic substance with the formula AlCl3 is aluminum chloride, also referred to as aluminum trichloride. It takes the form of [Al(H2O)6] hexahydrate. Aluminum chloride is ALCl3, which is composed of six water molecules. Aqueous hydrochloric acid, also referred to as muriatic acid, is a type of hydrochloric acid. It is a colourless solution with an overpowering odor. Strong acid is how it is categorized.

2 Al(s) + 6 HCl is the given reaction. ———-> 2 AlCl3 + 3H2

Using the provided data

The amount of HCl in moles is n= Volume * Concentration = 0.58575 mol (1.65 M * 355 ml)/1000 ml

based on the response,

It takes 6 mols of HCl. To neutralize 2 moles of aluminum, 0.58575 mol of hydrochloric acid must be used.

using the cross-multiplication method, 0.19525 moles are obtained by multiplying 0.58575% by 2/ 6.

Weight of the AlCl3 = 0.1952 moles * 133.340538 g/mol = 26.03 g

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Answer:

0.054 moles

Explanation:

It is the rounded off answer.

1st one

2_2_2

2nd one

3_1_1_3

i looked it up