Can someone please help I don’t now which one to put

Answer:

The final velocity of the motorcycle is 64.7 m/s

Note: Since the value for the acceleration of the motorcycle is not clear, it is assumed to be 4.55 m/s² in the calculation

Explanation:

Using the equation of motion that contains all the given values in the question: v² = u² + 2as

where v is final velocity; u is initial velocity; a is acceleration; s is horizontal distance

v = ?, u = 0 (since the motorcycle starts from rest), a = 4.55 m/s², s = 460 m

v² = 0² + 2 * 4.55 * 460

v² = 4186

take square root of both sides

v = 64.7 m/s

Therefore, the final velocity of the motorcycle is 64.7 m/s

The pressure of the gas in the aerosol container at 95°C would be 7.47 atm. Therefore, storing it at temperatures above 95°C is dangerous. The gas pressure in the container depends on its temperature and volume. The pressure of the gas in the aerosol container at 95°C would be 4.31 atm. Storing it at temperatures above 95°C is dangerous.

Given, The pressure of the gas in an aerosol container is 3.50 atm. The temperature of the gas is 24.0°C.The temperature above which it should not be stored is 95°C.The relationship between the pressure, volume, and temperature of a gas is given by the ideal gas law PV = nRT where P is the pressure, V is the volume, n is the number of moles, R is the universal gas constant, and T is the temperature. The given pressure of the gas is 3.50 atm and the temperature is 24.0°C. Hence, we need to convert it to Kelvin as follows:24.0°C + 273 = 297KThe temperature at which the aerosol container should not be stored is 95°C. Therefore, we need to convert this temperature into Kelvin as follows:95°C + 273 = 368KNow we can calculate the pressure of the gas at the given temperature using the ideal gas law: n, V, and R are constants, so we can write: P₁/T₁ = P₂/T₂ Thus, 3.50/297 = P₂/368Solving for P₂, we get: P₂ = 3.50 × 368/297P₂ = 4.31 atm Therefore, the pressure of the gas in the aerosol container at 95°C would be 4.31 atm. Storing it at temperatures above 95°C is dangerous.

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A dome on pendentives is an ancient building technique that could enclose the largest volume of space using the least amount of material. It is used in architecture.

A pendentive is an instrument used in buildings that allow the colocation of a circular and/or elliptical dome.

This circular and/or elliptical dome can be placed over a square/rectangular room.

The use of domes on pendentives is relatively common in certain architecture schools.

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The order of reaction is 1 and the value of the rate constant is 6.74*10^-5s^-1.What is the order of the reaction? To solve this question we have to check the half-life of a chemical reaction at different concentrations.

It is given in the question that when the initial concentration of reactant is 0.154m, it has half-life of 103s. Similarly, when initial concentration is 0.664m, it has half-life of 103s. To find the order of reaction, we have to use the equation for half-life of reaction. The equation for half-life of reaction is given as:\[\frac{t_{1/2} }{2}=\frac{1}{k}\frac{1}{[A]_{0}}\]Where, t1/2 is half-life of the reaction,[A]0 is the initial concentration of the reactant and k is the rate constant.

Putting the values in equation: When [A]0 = 0.154m and t1/2 = 103s, we get:\[\frac{103}{2}= \frac{1}{k} \frac{1}{0.154}\] Multiplying both sides with 0.154k:\[k*\frac{103}{2}*0.154 = 1\]When [A]0 = 0.664m and t1/2 = 103s, we get:\[\frac{103}{2}= \frac{1}{k} \frac{1}{0.664}\]Multiplying both sides with 0.664k:\[k*\frac{103}{2}*0.664 = 1\]Dividing second equation by first equation:\[\frac{k*\frac{103}{2}*0.664}{k*\frac{103}{2}*0.154}= \frac{0.664}{0.154}\] Simplifying the above equation, we get:\[k=6.74*10^{-5}s^{-1}\]Therefore, the order of reaction  is 1 and the value of the rate constant is 6.74*10^-5s^-1.

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In most drug discovery efforts, compound synthesis is regarded as the rate-limiting phase to accommodate various functional groups.

One of the most typical kinds of chemical reactions is a synthesis reaction, also known as a direct combination reaction. A + B AB is the result of the reaction between two and more chemical species in a synthesis.

The synthesis process is simple to identify in this form since there are more reactants then products. One bigger compound is created when multiple reactants come together. Synthesis reactions can be thought of as the opposite of breakdown processes. In most drug discovery efforts, compound synthesis is regarded as the rate-limiting phase to accommodate various functional groups.

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The structure of the product is drawn.

The reaction between pentanedioic anhydride and ammonia at elevated temperature is an example of amidation reaction. The product formed has a molecular formula of C₅H₇NO₂, which suggests that it has five carbon atoms, seven hydrogen atoms, one nitrogen atom, and two oxygen atoms.

The constitutional isomers with the molecular formula C₅H₇NO₂ are,

Pentanamide (also known as valeramide)

2-Aminopentanoic acid (also known as α-aminocaproic acid)

3-Aminopentanoic acid (also known as β-aminocaproic acid)

Of these three isomers, only 2-aminopentanoic acid and 3-aminopentanoic acid have two oxygen atoms. Therefore, one of these two isomers is the product of the reaction.

To distinguish between the two isomers, we need to consider the conditions of the reaction. The reaction was carried out at elevated temperature, which suggests that it is likely to be a thermal reaction. Under thermal conditions, the reaction is expected to favor the formation of the less substituted amide, which in this case is 2-aminopentanoic acid.

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Answer:

150

Explanation:

300 divided by 2

Changing the numbers of protons, neutrons, and electrons can have a significant impact on the net charge and mass number of an element.

In this exercise, there are three variables being manipulated. They are the numbers of protons, neutrons, and electrons. The symbol to represent each variable are:Protons - represented by the symbol P.Neutrons - represented by the symbol N.Electrons - represented by the symbol E.The number of protons is equal to the atomic number of an element, which is a unique identifier for that element. The number of neutrons and electrons can vary, which results in the creation of different isotopes of the same element. Isotopes are atoms of the same element that have different numbers of neutrons but the same number of protons.The net charge of an atom is determined by the difference between the number of protons and electrons. If there are more protons than electrons, the net charge is positive. If there are more electrons than protons, the net charge is negative. If the number of protons and electrons are the same, the net charge is neutral.The mass number of an atom is determined by the total number of protons and neutrons. Electrons have a negligible mass and are not included in the calculation of the mass number.

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Answer:

28.01

Explanation:

this is the molar mass

It important to clean debris from the external surface of the handpiece prior to sterilization because "the autoclave is capable of vaporizing mercury through amalgam restorations that have been removed."

Chemical vapor sterilizers, dry heat, as well as autoclaves are all appropriate sterilization techniques. Dental handpieces should not be used with ethylene oxide gas.

It is crucial to clean our dental handpieces with a mild detergent that would be germicidal in nature but isn't a disinfectant before sterilizing them. It is also possible to disinfect the handpiece's exterior with isopropyl alcohol.

Therefore, the autoclave is capable of vaporizing mercury through amalgam restorations that have been removed."

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Answer:

Here you go.

Explanation:

Hopefully it is not confusing.

Answer: A molecule of hydrochloric acid, for example, is composed of a hydrogen atom and a chlorine atom. When these molecules dissolve into water, they separate into a positively charged hydrogen ion and a negatively charged chlorine ion. ... Only some of the molecules of weak acids disassociate when added to water.

Explanation:

The effect of changing the temperature of the nitric acid on the rate of reaction. (Include measuring the volume of carbon dioxide gas produced) is Rate of reaction increases.

When we increase the temperature of the reaction the rate of reaction also increases. With the increase of the temperature of the nitric acid HNO₃, the rate of the reaction also increases as the molecule moves faster. Arrhenius equation given as :'

k = Ae^(Ea / RT)

or, ln k = -Ea /RT + ln A

where,

k = rate constant

A = Arrhenius constant

Ea = activation energy

R = gas constant

T = temperature

Thus, The effect of changing the temperature of the nitric acid on the rate of reaction. (Include measuring the volume of carbon dioxide gas produced) is Rate of reaction increases.

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The given statement "A hot plate is the only heat source available in the lab room to heat the hydrate in a crucible at least 2 times for 10-15 minutes at medium-high setting" is true because the water in hydrate can be removed by heating.

The crucible is the type of the laboratory glassware that is designed to melt or to burn the solid chemicals over the burner. Crucible is made from the heat resistant ceramic or the metal. The hot plates are the laboratory tools that is used for the  uniformly heat the samples. The hot plates are available with Varity of the  number of the different heating top styles.

Thus, the hot plate is the heating tool to heat the hydrate in the crucible.

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Answer:

A

Explanation:

Got a calculation of 8.05297

Answer:

C. 3.6 m/s

Explanation:

I just took a test on a-pe-x and it was correct! :)

The number of moles of oxygen consumed in the combustion of 20g of isoctane is 4.375 moles.

a) The equation for the complete combustion of isoctane is:
\(C_8H_{18} + 25O_2 --> 8CO_2 + 9H_2O\)
b) To calculate the number of moles of oxygen consumed, we first need to find the number of moles of isoctane used.
The molar mass of isoctane (\(C_8H_{18}\)) can be calculated as:
(8 x 12.01 g/mol) + (18 x 1.01 g/mol) = 114.16 g/mol
So, 20g of isoctane is equal to:
20 g ÷ 114.16 g/mol = 0.175 moles
According to the balanced chemical equation, 25 moles of oxygen are required to completely combust 1 mole of isoctane. Therefore, for 0.175 moles of isoctane, the amount of oxygen consumed can be calculated as:
0.175 moles x 25 moles of \(O_2\)/1 mole of isoctane = 4.375 moles of \(O_2\)

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To calculate the number of moles of oxygen consumed, we need to use the balanced equation to determine the mole ratio between isoctane and oxygen.

a) The equation for the complete combustion of isoctane is:

C8H18 + 12.5O2 → 8CO2 + 9H2O

b)  From the equation above, we can see that 1 mole of isooctane reacts with 12.5 moles of oxygen.
First, we need to calculate the number of moles of isoctane in 20g:
Number of moles of isoctane = mass / molar mass
Number of moles of isoctane = 20g / 114.23 g/mol
Number of moles of isoctane = 0.175 moles
Using the mole ratio, we can then calculate the number of moles of oxygen consumed:
Number of moles of oxygen consumed = number of moles of isoctane × mole ratio of oxygen to isoctane
Number of moles of oxygen consumed = 0.175 moles × 12.5
Number of moles of oxygen consumed = 2.1875 moles
Therefore, 2.1875 moles of oxygen are consumed during the combustion of 20g of isoctane.

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A separation process is a method that divides a mixture or solution of chemical compounds into two or more different product mixtures. It is a scientific approach of separating two or more substances in order to achieve purity.

How are chemical brews divided?

Mixtures can be separated using a variety of techniques. Chromatography on a solid medium necessitates solvent separation. Distillation involves the use of several boiling points. Evaporation removes a liquid from a solution, leaving a solid behind.

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Answer:

They would be to heavy and you would be really stiff

Explanation:

Imagine walking in a suit made of iron or tin

You would feel like the Tin Man

You would be stiff

Metals are hard and heavy

The acceleration of the car is equal to 3.33 m/s² with a velocity of 72 Km/hr.

Acceleration can be demonstrated as the rate of change of velocity over time. The acceleration can be explained as vector quantity due to both magnitude and direction. Acceleration is defined as the 2nd derivative of the position of the object w.r.t. time.

According to Newton's 2nd law of motion, the force exerted is equal to the mass times of acceleration of an object.

a = F/m

or, a = dv/dt

Given, the final velocity of the car, v = 72 Km/hr

v = 72 × 1000/3600 m/s

v = 20 m/s

The time is taken by car to travel, t = 20 s

The acceleration of the car, a = (20 - 0)/(6 - 0)

a =  3.33 m/s²

Therefore, the acceleration of the car is 3.33 m/s².

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Yes, \(Br^{-}\) and \(Cl^{-}\) ions both can be positively identified through  precipitation reaction or precipitimetry.

Through titration employing precipitation reaction or precipitimetry, these two ions can both be positively identified. When exposed to Cl- and Br- ions, AgNO3 transforms into silver halides. AgNO3 with Cl- ions precipitates white because AgCl is not particularly soluble in water, whereas AgNO3 with Br- ions precipitates cream.

A very light cream precipitate results from mixing cream and white ppt.

Both halides react as described below:

\(AgNO_{3}+ XCl\)\(= AgCl_{whiteppt.}\)

\(AgNO_{3}+ XBr\) \(= AgBr_{creamppt.}\)

Now, While AgBr does not dissolve in diluted ammonia, this AgCl precipitate does to create an Ag-diammonium ion combination. Two facts, including the fact that the ppt shade is now darker than the prior pale cream, demonstrate this. As a result of the addition of an ammonia solution, it becomes less concentrated, although some cream precipitates persist.

Second, concentrated ammonia dissolves the AgBr precipitate. AgBr precipitates dissolve when cream precipitate is filtered and concentrated ammonia is added. In solution Br- ions are confirmed by this.

\(Ag^{+}+NH_{3}\) ⇄ \((AgNH_{3} )_{2} ^{+}\)

The foregoing reaction switches in the right direction after the addition of diluted ammonia solution, and more and more Ag+ ions are complexed, producing the soluble form of Ag-diammonium complex.

Brown globules are produced when CHCl3 is added to the mixture and agitated.

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Answer:

Tornado

Explanation:

This is because, tornados are heavy constant winds that are blowing around all over causing an unstable atmosphere. Sometimes the weather will change drastically like causing hail, and cold fronts moving in. This is exactly what matches the conditions you show! :)

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The chemical formula Mn₂(CO₃)₃ represents a compound composed of manganese (Mn) and carbonate (CO₃) ions and contains 2 manganese atoms, 9 carbon atoms, and 9 oxygen atoms.

To determine the number of atoms of each element in the compound, we need to break down the formula and analyze the subscripts.

Breaking down the formula

- Mn₂ indicates that there are two manganese atoms in the compound.

- (CO₃)₃ indicates that there are three carbonate ions in the compound. Each carbonate ion consists of one carbon atom (C) and three oxygen atoms (O).

Analyzing the carbonate ion

Since there are three carbonate ions in the compound, we need to multiply the number of atoms in each ion by three:

- There are three carbon atoms (C) in each carbonate ion, so in total, there are 3 x 3 = 9 carbon atoms.

- There are three oxygen atoms (O) in each carbonate ion, so in total, there are 3 x 3 = 9 oxygen atoms.

Summing up the atoms

- Manganese (Mn): 2 atoms

- Carbon (C): 9 atoms

- Oxygen (O): 9 atoms

Therefore, the compound Mn₂(CO₃)₃ contains 2 manganese atoms, 9 carbon atoms, and 9 oxygen atoms.

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The empirical formula of the compound containing 83% potassium and 17% oxygen is K₂O.

The empirical formula represents the simplest whole-number ratio of atoms present in a compound. To determine the empirical formula, we need to convert the given percentages of potassium and oxygen into mole ratios.

Assuming we have 100 grams of the compound, we would have 83 grams of potassium and 17 grams of oxygen. To find the moles of each element, we divide the mass by their respective molar masses. The molar mass of potassium (K) is 39.10 g/mol, and the molar mass of oxygen (O) is 16.00 g/mol.

Converting the masses to moles, we find that we have approximately 2.12 moles of potassium and 1.06 moles of oxygen. To obtain the empirical formula, we divide the moles by the smallest number of moles, which is 1.06. This gives us a ratio of approximately 2:1.

Therefore, the empirical formula of the compound is K₂O, indicating that it contains two potassium atoms for every oxygen atom.

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Answer:

150million km

Explanation:

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The formula of barium phosphite is Ba₃(PO₄)₂.

A salt that is classified as inorganic is barium phosphate. The chemical formula for barium phosphate is Ba₃(PO₄)₂. Although barium phosphate is typically thought of as a colorless solid, it does have a fading odor resembling that of acetic vinegar. The barium phosphate structure was identified by the X-ray crystallography experiment as a connection of barium ions with the phosphate, Ba₂⁺ cations connected to a polyphosphate anion. The salts or esters that are created when tetrahedral PO₄ is transformed into a polyphosphate anion (phosphate). The oxygen atom that the structural unit shares is what binds it together. One of the hydrated forms of barium phosphate is barium phosphate dihydrate.

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Answer:

The independent variable is the cause. Its value is independent of other variables in your study.

The dependent variable is the effect. Its value depends on changes in the independent variable.

Ex: The ice cube melts on the stove.

Dependent variable: Ice Cube

Independent variable: heat of stove

Answer:

In an experiment, the IV(independent variable) is a variable that is changed to see how it affects something else, and the DV (dependent variable)is a variable that is being measured/observed.

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Answer:

12.9 g O₂

Explanation:

To find the mass of oxygen gas produced, you need to (1) convert grams KClO₃ to moles KClO₃ (via molar mass from periodic table values), then (2) convert moles KClO₃ to moles O₂ (via mole-to-mole ratio from reaction coefficients), and then (3) convert moles O₂ to grams O₂ (via molar mass). It is important to arrange the conversions/ratios in a way that allows for the cancellation of units (the desired unit should be in the numerator). The final answer should have 3 sig figs to match the given value (33.0 g).

Molar Mass (KClO₃): 39.098 g/mol + 35.45 g/mol + 3(15.998 g/mol)

Molar Mass (KClO₃): 122.542 g/mol

2 KClO₃ ---> 2 KCl + 3 O₂

Molar Mass (O₂): 2(15.998 g/mol)

Molar Mass (O₂): 31.996 g/mol

33.0 g KClO₃           1 mole                 3 moles O₂            31.996 g
--------------------  x  -------------------  x  -----------------------  x  ------------------  =
                               122.542 g          2 moles KClO₃            1 mole

=  12.9 g O₂