A truck tire has a volume of 218 L and is filled with air to 35.0 psi at 295 K. After a drive, the air heats up to 318 K. (b) If the tire volume increases 2.0%, what is the pressure (in psi)?

Answer:

The Explanation

Explanation:

:i imagine less blue crabs ngl

Answer:

thing

Explanation:

always

CH. Option A is correct

Given the reaction for the complete combustion of pagodane expressed as:

In order to determine the empirical formula of the hydrocarbon, we must know the moles of carbon and hydrogen produced in the given reaction

Given the following parameter:

Moles of carbon = 0.0768 moles

Determine the moles of hydrogen produced

Determine the mass of carbon using moles * molar mass

Mass of Hygrogen = 1.0g - 0.9216g

Mass of Hydrogen = 0.0784grams

Determine the moles of hydrogen

Moles of hydrogen = 0.0784 /1 = 0.0784moles

Divide the moles by the least molar amount to normalize

Carbon = 0.0768/0.0768 = 1

Hydrogen = 0.0784/0.0768 = 1.021

Since the molar amount is in the ratio 1:1, hence the empirical formula of pagodane is CH

Answer:

K2Cr2O7

Explanation:

Solubility refers to the amount of substance that dissolves in a given mass or volume of solvent. There are several units of solubility applicable in different areas.

Solubility is dependent on temperature. The solubility curve is a graphical representation of the dependence of solubility on temperature for different chemical species.

If we study the solubility curve closely, we will see that K2Cr2O7 has the highest solubility at 100°C. This means that if the trends continue, this substance will also have the highest solubility at 120°C.

Answer: c

Explanation:

Evidence did you see that indicated the liquid from copper II sulfate pentahydrate was water is color change to adding water to anhydrous copper II sulfate

Copper II sulphate also known as copper sulphate is an inorganic compound with the chemical formula CuSO₄ and when liquid from copper II sulfate pentahydrate was water then the color change from pale blue to white and change back to blue when water is added and the color change on adding water to anhydrous copper II sulphate has been used as test for the presence of water in a liquid

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0.16

Explanation:

when you divided 1.2.00 with 740 you get this number.

Answer: 2.86 inches

Explanation: To find the radius, then, we insert 18 in for the circumference. So 18=2∏r. Solving for r gives 9/∏, or approximately 2.86 inches.

Answer:

2.86 inches

Explanation:

The probability that a randomly selected x-value from the distribution is at least 80 is approximately 0.9938.

In a normal distribution with a mean of 98 and a standard deviation of 6, we can calculate the probability of a randomly selected x-value being at least 80.

To do this, we need to find the area under the normal curve to the right of 80. By standardizing the value using the z-score formula, we can convert 80 to a z-score of (80 - 98) / 6 = -3.

The area to the right of this z-score can be obtained from a standard normal distribution table or using statistical software, which is approximately 0.9938.

A normal distribution is a common probability distribution that has a symmetric bell-shaped curve. It is characterized by its mean and standard deviation.

In this case, the mean is 98, indicating the center of the distribution, and the standard deviation is 6, representing the spread of the data around the mean.

The probability calculation involved converting the x-value of interest (80) to a z-score, which measures the number of standard deviations an x-value is from the mean.

By finding the area under the curve to the right of the z-score, we determine the probability of selecting an x-value that is at least 80.

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Answer:

Exocytosis helps the cell rid itself of wastes. The sodium-potassium pump requires energy to move ions across the cell membrane. Diffusion is an active process that requires a cell to expend a great deal of energy. I think

I’m probably wrong but I think it’s the sodium-potassium pump.

The sensitivity of the drug can be determined by finding the derivative of the reaction function with respect to the dosage.

To find the sensitivity of the drug, we need to calculate the derivative of the reaction function R(x) with respect to x.

Taking the derivative of the given function R(x) = \(x^2(660 - x/3)\) involves applying the product rule and chain rule.

Differentiating R(x) with respect to x yields:

R'(x) = \(2x(660 - x/3) - x^2/3\)

Simplifying further:

R'(x) = \((1320x - x^2) / 3\)

This expression represents the rate of reaction with respect to the dosage, which indicates the sensitivity of the drug.

By evaluating R'(x) at different dosage values, we can determine how the rate of reaction changes with the dosage and infer the drug's sensitivity.

The sensitivity of a drug refers to how the rate of reaction, or response, changes in relation to the dosage administered.

In this case, the sensitivity can be quantified by calculating the derivative of the reaction function R(x) with respect to the dosage x.

By taking the derivative, we obtain R'(x), which represents the rate of change of the reaction with respect to the dosage.

Evaluating R'(x) at different dosage values allows us to determine the drug's sensitivity to dosage variations.

A higher magnitude of R'(x) indicates a greater sensitivity, as the rate of reaction changes more rapidly with dosage adjustments.

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A pressure saucepan, also known as a pressure cooker, reduces cooking time by increasing atmospheric pressure inside the cooking vessel. This is achieved by sealing the pot tightly and trapping steam generated from boiling liquids and food. The increased pressure raises the boiling point of water, allowing food to cook at higher temperatures than normal. Options 1 and 3 are correct.

Option 1: Increasing atmospheric pressure is correct because the sealed pressure cooker traps steam, which increases the pressure inside the pot. The increased pressure raises the boiling point of water, resulting in faster cooking times.

Option 2: Decreasing atmospheric pressure is incorrect because pressure cookers work by increasing pressure, not decreasing it.

Option 3: Increasing vapor pressure is correct because as the pressure inside the pressure cooker increases, the vapor pressure of water also increases. This higher vapor pressure enables the food to cook more rapidly.

Option 4: Decreasing vapor pressure is incorrect because the pressure cooker actually increases the vapor pressure by raising the overall pressure inside the pot.

Option 5: Ionizing the added salt is unrelated to the operation of a pressure cooker and does not contribute to the reduction in cooking time.

Hence, a pressure saucepan reduces cooking time by increasing the atmospheric pressure and vapor pressure inside the pot.

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Answer:

Two, I'd say, unless there's some trick to what you're asking! :)

Explanation:

Answer:

eleven

Explanation:

combine numbers together

1   +   1

1  + 1

1 + 1

1+1

11

--------------------------------------------------------

just kidding LOL

answer is 2

Answer:=33.8 psi

Explanation:

Answer:

33.8007 (i think)

Explanation:

[H+]=3.98x10^-9

[H+]=10^-pH=10^-8.4

[H+]=10^-11, base

[H+]=10^-pH=10^-11

A solution with a pH of more than 7 is basic.

Lemon juice because it is more acidic

pH of lemon juice: 2.5

pH of vinegar: 3.3

Since the pH of lemon juice is lower, it is more acidic and will be more effective at removing the basic deposits.

Following represents the number of Molecules of the type indicated is present as a reactant or product of the chemical reaction shown is the coefficient of the species

The number of atoms, molecules, or formula units of a reactant or product in a balanced chemical equation is the coefficient of that species then the mole ratio of two substances in a chemical reaction is the ratio of their coefficients in the balanced chemical equation and the this numbers are called as coefficient and they tell how many of each molecule are participate in the reaction

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The reactions are in order which includes combustion reaction, Hydration reaction, oxidation reaction, and displacement reaction.

a) A combustion reaction is a chemical reaction between a fuel and an oxidant where heat is released. The combustion reaction example is given below. It is a balanced chemical reaction.

2C₃H₆(g) + 9O₂(g) --------> 6CO₂(g) + 6H₂O(g)

b. A hydration reaction is a chemical reaction in which a molecule of water is added to another molecule. Here Aluminum oxide is added to water to form aluminum hydroxide.

4Al₂O3(s) + 6H₂O(l)------> 2Al(OH)3(s)

c. When a metal reacts with oxygen, the metal forms an oxide. Oxide is a compound of metal and oxygen. Here lithium metal reacts with oxygen to form lithium oxide.

2Li(s) + O₂(g)-----> Li₂O(s)

d. A displacement reaction is one in which a more reactive element displaces a less reactive element from a compound. Here Zinc is more reactive than silver, so silver was displaced to form Zinc Nitrate.

Zn(s) + 2AgNO₃(aq) -----> 2Ag(s) + Zn(NO₃)₂(aq)

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An igneous rock is formed from cooling and hardening magma in different environments. Therefore, the correct matches are 1-C, 2-A and 3-B.

Sedimentary, igneous, and metamorphic rocks are the three primary categories of rocks. Each of these rocks is the result of physical processes that are a component of the rock cycle, such as melting, cooling, eroding, compacting, or deforming.

1.igneous rock: c.formed from cooling and hardening magma in different environments

2.sedimentary rock: a.rock fragments, organic material, and solids from a solution are

3.metamorphic rock: b.heat and/or pressure to existing rocks causes the rocks to change physically and/or chemically.

Thus, the correct matches are 1-C, 2-A and 3-B.

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Ethanol is produced when ethane and ethene react with water and a catalyst like sulfuric acid. Adding concentrated sulfuric acid to hot ethanol (acts as a catalyst).

To eliminate carbon dioxide and sulphur dioxide that are created as byproducts, the gases are passed through a sodium hydroxide solution. The main product that is gathered over water is ethene. As a result, dehydration of ethanol produces ethene rather than ethane. The names Mattling acid and Oil of Vitriol are other names for sulfuric acid. It is highly caustic and acidic in nature. It dehydrates and oxidises when  present in higher amounts. It is a clear, syrup-like liquid with no colour or smell. A substance having the chemical formula C 2H 6, ethane is an organic chemical.

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Answer:

its c

Explanation:

B) increasesAnswer:

Explanation:

As the concentration of a KOH solution increases, the number of moles of HCl needed to neutralize the KOH solution increases. Therefore, the correct option is option B.

The World System representing Units (SI) uses a mole (symbol mol) as the unit of material amount. How many fundamental entities of a particular substance are present in an object and sample is determined by the quantity of that material. An elementary entity can be a single atom, a molecule, a pair of ions, an ion pair, even a subatomic particle like a proton depending on the makeup of the substance.

For instance, although having differing volumes and masses, ten molecules of liquid (a chemical compound) because 10 moles of mercurial (a chemical element) both have the same quantity of substance, because the mercury has exactly one atom every every molecular structure of the water. As the concentration of a KOH solution increases, the number of moles of HCl needed to neutralize the KOH solution.

Therefore, the correct option is option B.

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P-type transporters are primary active transporters that use ATP hydrolysis to transport ions across cell membranes while ABC transporters are secondary active transporters that use ATP hydrolysis to transport a wide range of substrates across cell membranes. ATP hydrolysis results in different conformational changes for each transporter. So, the correct answer is (A).

P-type transporters are primary active transporters while ABC transporters are secondary active transporters. This is the key distinguishing feature between P-type transporters and ABC transporters.

P-type transporters are a family of primary active transporters that use ATP hydrolysis to transport ions across cell membranes, generating an electrochemical gradient. They typically transport ions such as sodium, potassium, and calcium against their concentration gradients.

ABC (ATP-binding cassette) transporters, on the other hand, are a family of secondary active transporters that also use ATP hydrolysis to transport a wide range of substrates, including ions, lipids, and peptides, across cell membranes. So, correct option is (A).

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Answer:

Many people have a qualitative idea of what is meant by concentration. Anyone who has made instant coffee or lemonade knows that too much powder gives a strongly flavored, highly concentrated drink, whereas too little results in a dilute solution that may be hard to distinguish from water. In chemistry, the concentration of a solution is the quantity of a solute that is contained in a particular quantity of solvent or solution. Knowing the concentration of solutes is important in controlling the stoichiometry of reactants for solution reactions. Chemists use many different methods to define concentrations, some of which are described in this section.

Molarity

The most common unit of concentration is molarity, which is also the most useful for calculations involving the stoichiometry of reactions in solution. The molarity (M) is defined as the number of moles of solute present in exactly 1 L of solution. It is, equivalently, the number of millimoles of solute present in exactly 1 mL of solution:

molarity=molesofsolutelitersofsolution=mmolesofsolutemillilitersofsolution(4.5.1)

(4.5.1)molarity=molesofsolutelitersofsolution=mmolesofsolutemillilitersofsolution

The units of molarity are therefore moles per liter of solution (mol/L), abbreviated as MM . An aqueous solution that contains 1 mol (342 g) of sucrose in enough water to give a final volume of 1.00 L has a sucrose concentration of 1.00 mol/L or 1.00 M. In chemical notation, square brackets around the name or formula of the solute represent the molar concentration of a solute. Therefore,

[sucrose]=1.00M(4.5.2)

(4.5.2)[sucrose]=1.00M

is read as “the concentration of sucrose is 1.00 molar.” The relationships between volume, molarity, and moles may be expressed as either

VLMmol/L=L(molL)=moles(4.5.3)

(4.5.3)VLMmol/L=L(molL)=moles

or

VmLMmmol/mL=mL(mmolmL)=mmoles(4.5.4)

(4.5.4)VmLMmmol/mL=mL(mmolmL)=mmoles

Figure 4.5.14.5.1 illustrates the use of Equations 4.5.34.5.3 and 4.5.44.5.4 .

alt

Figure 4.5.14.5.1 : Preparation of a Solution of Known Concentration Using a Solid Solute

Example 4.5.14.5.1 : Calculating Moles from Concentration of NaOH

Calculate the number of moles of sodium hydroxide (NaOH) in 2.50 L of 0.100 M NaOH.

Given: identity of solute and volume and molarity of solution

Asked for: amount of solute in moles

Strategy:

Use either Equation 4.5.34.5.3 or Equation 4.5.44.5.4 , depending on the units given in the problem.

Solution:

Because we are given the volume of the solution in liters and are asked for the number of moles of substance, Equation 4.5.34.5.3 is more useful:

molesNaOH=VLMmol/L=(2.50L)(0.100molL)=0.250molNaOHmolesNaOH=VLMmol/L=(2.50L)(0.100molL)=0.250molNaOH

Exercise 4.5.14.5.1 : Calculating Moles from Concentration of Alanine

Calculate the number of millimoles of alanine, a biologically important molecule, in 27.2 mL of 1.53 M alanine.

The proportion of the difference in temperature between inhaled and exhaled air that can be attributed to the nasal passageways when nose breathing varies, but it is estimated to be around 90%.

When we breathe through our nose, the air passes through the nasal passageways before reaching the lungs. The nasal passageways are lined with blood vessels and mucus membranes that help to warm the inhaled air before it reaches the lungs. This warming process is important because the air needs to be at a certain temperature for optimal gas exchange in the lungs.

The temperature difference between the inhaled and exhaled air is mainly due to the heat exchange that occurs in the nasal passageways. The inhaled air is colder than the body temperature, while the exhaled air is closer to body temperature. The nasal passageways warm up the inhaled air by transferring heat from the warm blood vessels and mucus membranes to the air.

While the exact proportion can vary depending on factors such as ambient temperature and individual physiology, it is estimated that around 90% of the difference in temperature between inhaled and exhaled air can be attributed to the nasal passageways when nose breathing. This demonstrates the important role that the nasal passageways play in regulating the temperature of the air we breathe.

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Answer:  50 nm

Explanation:  Two steps:

1.  Divide 3.25/6.5 = 0.5

2.  Divide 10^8/10^6 = 10^2

nm^2/nm = nm

Combine:  0.5x10^2 nm

or 50 nm

a. Silver coin - Element (Silver is a pure element and is not chemically combined with any other element in a silver coin)

b. Air - Mixture (Air is a mixture of gases, primarily nitrogen and oxygen, with trace amounts of other gases and particles)

c. Coffee - Mixture (Coffee is a mixture of various compounds such as water, caffeine, and organic compounds that give it its flavour and aroma)

d. Soil - Mixture (Soil is a mixture of various substances such as minerals, organic matter, water, and air)

My everyday experiences influenced my response because I have come across these examples in my daily life and have been taught about them in science classes. For example, I know that air is composed of different gases and particles, and that soil is made up of a mixture of substances, including minerals and organic matter. Similarly, I know that a silver coin is made of pure silver and that coffee is made of various compounds.

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Answer:

c. -1020.9 kJ

Explanation:

4Fe (s) + 3 O₂ (g) --> 2 Fe₂O₃(s)         ΔH  =  -826.0 kJ/mol.

atomic weight of iron = 56

69.03 g = 69.03 / 56

= 1.23268 moles

Heat released by 1.23268 moles

= 1.23268 x 826.0

= -1020.9 kJ .

The amount of heat gained by the water is 500 calories. Thus, option D is correct.

Given:

Mass of water (m) = 100 g

Change in temperature (ΔT) = 30°C - 25°C = 5°C

The specific heat capacity of water (c) is approximately 1 calorie/gram°C.

Now, the amount of heat gained by the water,

Q = mcΔT

Where:

Q is the heat gained or lost by the substance

m is the mass of the substance

c is the specific heat capacity of the substance

ΔT is the change in temperature

Plugging in the values into the formula:

Q = 100 × 1 × 5

Q = 500 calories

Therefore, the amount of heat gained by the water is 500 calories.

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Given that there are two small nonconducting spheres with a total charge of Q and it is given that Q = Q₁ + Q₂ = 87.0 μC.

Part A: Since the force exerted by sphere 2 on sphere 1 is equal and opposite to the force exerted by sphere 1 on sphere 2, this means the distance between the centers of the two spheres is equal to the radius of the sphere.

Therefore, the distance between their centers, d = 2r = 31.0 cm.So, the force of repulsion isF = 130 NThe electrostatic force of repulsion between two charged spheres is given by the formulaF = kQ₁Q₂/d²where

k = 9 x 10⁹ Nm²/C² is the Coulomb constant.Rearranging the above equation, we ge

tQ₂ = Fd²/kQ₁

= (130 N) (31.0 cm)²/ (9 x 10⁹ Nm²/C²)Q₁= 87.0 μCQ₂

= (130 N) (31.0 × 10⁻² m)²/ (9 x 10⁹ Nm²/C²)(Convert the distance into meters)Q₂

= 4.96 μCThus, the charge Q₁

= 87.0 μC, and the charge Q₂

= 4.96 μC.

Part B: If the force were attractive, the direction of the force would have been opposite. Therefore, the charge Qᵢ would be negative. Thus, for the same distance and force,F = kQ₁Q₂/d²=-130 NAs the force is negative, the charges must be opposite in sign, which means one is positive, and the other is negative.

We can take Q₁ to be positive. So,Q₂ = -F d²/kQ₁

= -(130 N) (31.0 × 10⁻² m)²/ (9 x 10⁹ Nm²/C²) (87.0 × 10⁻⁶ C)

= -2.34 μCThus, Qᵢ

= -2.34 μC (negative, as expected).Hence, Q₁

= 87.0 μC, Q₂

= 4.96 μC, and Qᵢ

= -2.34 μC.

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Answer:

If another scientist give better reasons;if they tested their hypothesis and it was wrong; if someone proved whatever the idea was to be wrong

Explanation:

I mean the list can go on at this point

Answer:

Scientists might change their ideas if new discoveries or evidence is acquired,that could prove a theory wrong.

Explanation:

Answer

they atract

Explanation: