Gasoline is used to power most of the cars in the United States and worldwide. The average fuel economy for a gasoline powered car is about 32 miles per gallon. The average car in the U.S. Is driven about 15 000 miles (24 000 kilometers) per year. Calculate the number of gallons of gasoline that are combusted by the average car in the U.S. Each year.

Answer:

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

From the question

volume of substance = 250 cm³

density = 4.259 g/cm³

We have

mass = 4.259 × 250

We have the final answer as

Hope this helps you

In the preceding equation, 6.67 moles of boric acid (\(H_3BO_3\)) will react to generate 10 moles of water (\(H_2O\)).

To determine the number of moles of boric acid that react in the equation to produce 10 moles of water, we need to examine the balanced chemical equation and use stoichiometry.

1. Begin by examining the balanced chemical equation for the reaction involving boric acid and water. Let's assume the equation is:

  \(3H_2O\) + \(3H_2O\) -> \(B_2O_3\) + \(6H_2O\)

2. From the balanced equation, we can see that 2 moles of boric acid (H3BO3) react with 3 moles of water (\(H_2O\)) to produce 6 moles of water (\(H_2O\)).

3. Use the given information that 10 moles of water (\(H_2O\)) are produced. Since the stoichiometric ratio between boric acid and water is 2:3, we can set up a proportion to find the number of moles of boric acid:

  2 moles \(H_3BO_3\) / 3 moles \(H_2O\) = x moles \(H_3BO_3\) / 10 moles \(H_2O\)

4. Cross-multiply and solve for x:

  (2 moles \(H_3BO_3\))(10 moles \(H_2O\)) = (3 moles \(H_2O\))(x moles \(H_3BO_3\))

  20 moles \(H_2O\) = 3x moles \(H_3BO_3\)

5. Divide both sides of the equation by 3 to isolate x:

  x moles \(H_3BO_3\) = (20 moles \(H_2O\)) / 3

6. Calculate the value of x:

  x moles \(H_3BO_3\) ≈ 6.67 moles \(H_3BO_3\)

Therefore, approximately 6.67 moles of boric acid (\(H_3BO_3\)) will react to produce 10 moles of water (\(H_2O\)) in the given equation.

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Answer:

0.96 mol AG

Explanation:

To see the number of atoms of an element, we need to multiply stoichiometry of that molecule to the number that is written on the foot of element. Thus the balanced reaction is

\(\rm Mg+2AgNO_{3}\rightarrow Mg(NO_{3})_{2}+2Ag\)

And the mole of silver produced from  0.480 mol is  0.96 mol    

Balanced equation is the one in which the total number of atoms of a species on reactant side is equal to the total number of atoms on product side.

The unbalanced equation is

\(\rm Mg+AgNO_{3}\rightarrow Mg(NO_{3})_{2}+Ag\)

Magnesium atoms on reactant and product side is 1.

Nitrogen atoms on reactant side is 1 and on product side it is 2 so, multiply \(AgNO_{3}\) by 2, now the reaction becomes

\(\rm Mg+2AgNO_{3}\rightarrow Mg(NO_{3})_{2}+Ag\)

Silver atom on reactant side is 2 while on product side it is 1 so, multiply Ag by 2, now the balanced equation is

\(\rm Mg+2AgNO_{3}\rightarrow Mg(NO_{3})_{2}+2Ag\)

The mole ratio of Mg to silver is 1:2

1mole of Mg produce=2 mole of Silver

0.480 mol of magnesium produce= 2×0.480=0.96 mol fo silver

Thus the balanced reaction is

\(\rm Mg+2AgNO_{3}\rightarrow Mg(NO_{3})_{2}+2Ag\)

And the mole of silver produced from  0.480 mol is  0.96 mol        

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Answer:

it's not clear

Explanation:

.

Option A, In the polysaccharide cellulose, large numbers of monosaccharides are linked together through glycosidic linkages.

The most prevalent carbohydrates in nature are polysaccharides, which have several uses including energy storage and inclusion in plant cell walls. Large polymers known as polysaccharides are created by joining tens to thousands of monosaccharides together via glycosidic connections. Starch, glycogen, and cellulose are the three polysaccharides that are most prevalent. Because each of these three produces only one kind of monosaccharide (glucose) after full hydrolysis, they are collectively known as homopolymers. In addition to monosaccharides, heteropolymers may also contain sugar acids, amino sugars, or noncarbohydrate compounds. Non-reducing carbohydrates known as polysaccharides lack the sweetness and do not mutate.

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Answer:

Agree

Explanation:

Answer:

Agree

Explanation:

Answer:

Ocean

Explanation:

The maximum salinity is about 35 parts per mille. Among other terms, around 3.5 per cent of seawater weight is produced from salts dissolved.

So a lot of salt water in oceans

Hope this helps.

Answer:

b)

Explanation:

ocean is a containing salt water

The most important variable to control in this experiment the type of bicycle tyre.

An experiment is a test under controlled conditions made to either demonstrate a known truth, examine the validity of a hypothesis, or determine the efficacy of something previously untried.

According to this question, Dan and Dawn wants to know if there is any difference between the mileage expected from bicycle tires from two different manufacturers.

Dan, then, conduct an experiment by putting one brand on his bike and Dawn will put the other brand on her bike.

In this experiment, the independent variable is the different mileage from different manufacturers. This means that to make this experiment a controlled one, all other variables must be kept constant.

Therefore, the most important variable to control in this experiment the type of bicycle tyre because Dan and Dawn must ensure that they use the same type of bicycle tyre.

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The safety of the spring water sample is said to be  that in an untreated state, it is said to be undrinkable.

The EPA is one that tells that the spring water is seen as a kind of any water that is said to have its origin from any  kind of underground aquifer and is said to be taken as it flows naturally to the earth's surface or through the use of a borehole that lunch into the underground  water  source.

Note that studies shows that when a spring water is said to be examined, the different parameters of health safety were said to be analyzed by the use of laboratory tests and the outcome of the  study reveals that water is not good  for drinking because it has higher concentrations of ammonium ion as well as others.

Hence, The safety of the spring water sample is said to be  that in an untreated state, it is said to be undrinkable.

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Answer:

I would say go with B not so sure but pretty sure it is

Answer:

C

they store genetic information

B. They speed up chemical reactions

Answer:

thermal and light energy

Answer:

pls pls pls pls help me out i say the answer but i need some brainless plss

Answer: 3.31 bar

Explanation:

PV=nRT

P=nRT/V

n=1

R=0.08206

T=45.0C = 318.15K

V=8.00L

P=((1)(0.08206)(318.15))/8

P=3.2634atm

1atm=1.01325bar

3.2634*1.01325=3.3066bar or using sig figs 3.31 bar

If a sample of 1.00 mol of gas in a 8.00 l container is at 45.0 °c. The pressure of the gas is 3.25 bar.

To solve this problem, we need to use the Ideal Gas Law:

PV = nRT

where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature in Kelvin.

First, we need to convert the temperature from Celsius to Kelvin:

T = 273.15 + 45.0 = 318.15 K

Now we can plug in the values we know:

P(8.00 L) = (1.00 mol)(0.0821 L·bar/mol·K)(318.15 K)

Simplifying this equation, we get:

P = (1.00 mol)(0.0821 L·bar/mol·K)(318.15 K) / 8.00 L

P = 3.25 bar

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Based on the hypotheses discussed in Chapter 12 regarding melting points and the forces that hold materials together, we can make a prediction about the forces holding atoms of cesium and lithium together in their solid metal forms.

One hypothesis suggests that stronger forces between atoms result in higher melting points. Another hypothesis proposes that metals are held together by metallic bonds, where positively charged metal ions are surrounded by a sea of delocalized electrons.

Considering these hypotheses, we can infer that cesium atoms would be held together by stronger forces compared to lithium atoms in their solid metal forms. This is because cesium is located further down the periodic table, belonging to Group 1 (alkali metals), whereas lithium is in Group 2 (alkaline earth metals). As we move down a group in the periodic table, the atomic radius generally increases, leading to weaker forces of attraction between atoms.

Therefore, the larger atomic size of cesium compared to lithium would result in weaker interatomic forces, making cesium's solid metal form have a lower melting point compared to lithium.

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The concentration of dye is most likely monitored using UV-Vis absorption during the reaction in this experiment. This method involves measuring the amount of light absorbed by the dye solution, which is directly proportional to the concentration of the dye.

By measuring the absorption at various time intervals, the concentration of the dye can be monitored throughout the reaction. Measuring volume of gas produced, redox, and acid-base titration methods are not typically used to monitor the concentration of dye in a reaction.the concentration of dye can be monitored using UV-Vis absorption. This technique measures the absorption of light by the dye at a specific wavelength, which is directly related to its concentration. As the reaction proceeds, the change in absorbance can be tracked, allowing you to monitor the concentration of the dye throughout the experiment.

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Answer:

It has 2 phosphorus atoms in 1 mol

so for 1.75 mol =2×1.75

Explanation:

need thanks and make me brainiest if it helps you

There will be two atoms of phosphorus in the 1.75 mol of calcium phosphate.

Atoms are the smallest unit of matter. In a chemical reaction, the number of atoms shows the quantity of an element in the compound or reaction. Phosphorus is a chemical element that is preset in the periodic table.

In calcium phosphate, Ca3(PO4)2, the number of atoms can be calculated by counting the number of moles that is given in the equation.

The number of atoms of calcium is 3, and the number of phosphorus atoms is 2.

Now given the 1.75 mol of calcium phosphate, so the number of atoms of phosphorus will be the same in any number of moles of calcium phosphate. So there will be 2 atoms of phosphorus in the given equation.

Thus, the number of atoms is two.

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1. The nucleus contains the gene that codes for the protein. This gene is translated into mRNA, which leaves the nucleus through pores.
2. On ribosomes found on the surface of the rough endoplasmic reticulum, the protein is built as the mRNA is translated.
3. The rough endoplasmic reticulum is able to modify proteins and store them for short periods of time.
4. From the endoplasmic reticulum to the Golgi apparatus, the protein is transported by transitional vesicles.

What is protein?
A macronutrient called protein is necessary for gaining muscle growth. Although it can also be found in other sources like nuts and legumes, it is more frequently found in animal products. Amino acids, which are organic molecules formed of carbon, hydrogen, nitrogen, oxygen, or sulfur, are the chemical building blocks of protein.

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Vapor density is defined as the amount of weight of a gas or vapor in comparison to air.

The relative weight of a gas or vapor in comparison to air, which has an arbitrary value of one, is defined as vapor density. If a gas's vapor density is less than one, it will rise in air. When the vapor density exceeds one, the gas will normally sink in air.

Vapor density is only a broad concept used to estimate where vapors might be discovered when released. This physical parameter, however, is not absolute and can be influenced by:

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Fertilizer from suburban lawns and wastewater from a water treatment plant.

What is fertilizer?

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Answer:

Of the options below, which is an example of a point source of water pollution?

Litter and pet waste are left on a city’s beaches.

Landscapers' fertilizers and pesticides are sprayed on the lawns of a neighborhood.

Acidic runoff from abandoned mines contains lead and mercury that saturate the soil.

A factory’s wastewater pipe opens directly over a nearby river.

CONCEPT

Explanation:

Correct Answer:

A factory’s wastewater pipe opens directly over a nearby river.

The pots and other articles made from clay hardened by heat is called ceramics..

HOPE IT'S HELPFUL FOR U MATE!!!!

5.20 g / 40.00 g = 0.130 moles NaOH

molarity = moles of solute / liters of solution

M = 0.130 moles / 0.500 L

M = 0.260

b) 0.260 M

The molarity of the solution is 0.260M

Molarity is the moles of a solute per litres of a solution. Molarity is also known as the molar concentration of a solution. It is denoted by M.

Solution is a homogeneous mixture composed of two or more substances.

Molarity = Moles of solute / litres of solution

5.20g / 40.00g/mol = 0.130 moles NaOH

M = 0.130 moles / 0.500L

M = 0.260M

Hence, option 2 is the answer.

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The synthesis of ammonia with iron catalyst is an example of homogeneous catalysis. This is because the iron catalyst and the reactants are in the same phase (gas) during the reaction.

In contrast, the hydrogenation of fatty acids with nickel catalyst and decomposition of ozone with gaseous nitric oxide catalyst are examples of heterogeneous catalysis because the catalyst and reactants are in different phases (solid and gas, respectively) during the reaction.
                                    decomposition of ozone with gaseous nitric oxide catalyst. This is an example of homogeneous catalysis because both the catalyst (gaseous nitric oxide) and the reactants (ozone) are in the same phase, which is the gas phase.

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Hydrogen Bonding is the strongest of the intermolecular forces because it is the attraction of the positively charged end of one molecule to the negatively charged end of another molecule.

Molecules are the smallest particles of matter that have all of the chemical properties of an element or compound. They are made up of two or more atoms held together by chemical bonds. Molecules can be made of different types of atoms and can vary in size, shape and structure. They are an essential part of all living organisms and are responsible for the formation of many chemical reactions.

1. Hydrogen Bonding

2. Dipole-Dipole Interactions

3. London Dispersion Forces

4. Ion-Dipole Interactions

Rank from weakest to strongest IMF:

3. London Dispersion Forces

2. Dipole-Dipole Interactions

4. Ion-Dipole Interactions

1. Hydrogen Bonding

London Dispersion Forces are the weakest of the intermolecular forces because they are a temporary attraction of the electrons of the atoms of two different molecules. Dipole-Dipole Interactions are slightly stronger than London Dispersion forces because they are the attraction of a positive end of one molecule to the negative end of another molecule. Ion-Dipole Interactions are stronger than Dipole-Dipole Interactions because they are the attraction of an ion to the oppositely charged end of a molecule. Finally, Hydrogen Bonding is the strongest of the intermolecular forces because it is the attraction of the positively charged end of one molecule to the negatively charged end of another molecule.

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You can tell an organic liquid is dry after adding a drying agent when it becomes clear and free of any cloudiness or suspended particles.

Drying agents, such as calcium chloride or magnesium sulfate, work by absorbing water from the organic liquid. Initially, the liquid may appear cloudy or have visible particles. As the drying agent absorbs the water, the liquid will become clearer, indicating that it is dry.

The process of drying an organic liquid involves mixing the liquid with a drying agent. During this process, the drying agent attracts and binds with the water molecules present in the liquid. As the water is removed, the organic liquid becomes more transparent and less cloudy. Once the liquid appears completely clear, with no visible particles or cloudiness, it is a strong indication that the drying agent has effectively removed the water, and the organic liquid is now dry.

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Hydrogen molecule is represented by \(H_2\). The correct option is C.

1. H=H: This representation uses an equal sign (=) to depict a chemical bond between the two hydrogen atoms. However, in reality, the bond between hydrogen atoms is a covalent bond, where the two hydrogen atoms share electrons. Therefore, the representation "H=H" is not commonly used to represent a hydrogen molecule.

2. H:H: This representation uses a colon (:) to depict a chemical bond between the hydrogen atoms. Similar to the previous representation, it suggests a covalent bond. However, this notation is not commonly used to represent a hydrogen molecule. The use of a colon is more typical for indicating a functional group or a specific type of bond in organic chemistry.

3. \(H_2\): This representation is a chemical formula and is commonly used to represent a hydrogen molecule. The "H" represents a hydrogen atom, and the subscript "2" indicates that there are two hydrogen atoms bonded together in the molecule.

4. H-H: This representation uses a hyphen (-) to depict a chemical bond between the hydrogen atoms. It is a common notation to represent a covalent bond between two hydrogen atoms in a hydrogen molecule. The hyphen represents the shared pair of electrons between the atoms.

The representation "H:H" is not commonly used to represent a hydrogen molecule. The correct and widely accepted representations for a hydrogen molecule are "\(H_2\)" or "H-H".

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Answer:

20 grams.

Explanation:

5 mols of a compound has a mass of 100 grams

1 mol of the same compound has a mass of 100/5 = 20 grams

This indicates that the pressure inside the vessel will increase correspondingly if the temperature of the vessel is raised from 300 K to 450 K while maintaining a constant volume. Therefore 15 atm is the correct response to the question.

The ideal gas equation, which states that PV = nRT, where P is pressure, V is volume, n is the number of moles of gas, R is gas constant, and T is temperature in Kelvin, can be used to provide the solution.

The ideal gas law can be rearranged to solve for the pressure if the quantity of gas and the vessel's volume are both constant:

P = nRT/V

This indicates that the pressure inside the vessel will increase correspondingly if the temperature of the vessel is raised from 300 K to 450 K while maintaining a constant volume.

We can use the difference between the new temperature and the starting temperature to determine the new pressure:

When P1 and T1 are the beginning pressure and temperature, and P2 and T2 are the ultimate pressure and temperature, the equation P2/P1 = T2/T1 is used.

With the above numbers substituted, we obtain P2/P1 = 450 K/300 K = 1.5.

P2 = 1.5P1 is obtained by multiplying both sides by P1.

Since we are unsure of the starting pressure, we are unable to determine the precise value of the new pressure. The nearest solution can be found using the offered answer options, though.

Taking the initial pressure as a given is 10 atm, then the new pressure would be:

P2 = 1.5 x 10 atm = 15 atm

Therefore, the answer is (d) 15 atm.

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Water is the basis for life as we know it. The unique properties involving its high heat capacity, high heat of vaporization, its ability to remain liquid over a wide temperature range, its unusual density properties in its solid form, and its dipolar nature make water irreplaceable. The uniqueness of water with regards to its properties and dipolar nature is given above.

To say that a molecule is dipolar means that it has two poles or two different charges. Water molecules are dipolar because the hydrogen atoms carry a partial positive charge while the oxygen atom carries a partial negative charge. The dipolar nature of water is a crucial property that makes it a versatile solvent and facilitates many important biological processes. It allows water to dissolve substances with different charges and helps maintain the structure of proteins and DNA by forming hydrogen bonds with these molecules. In short, the dipolar nature of water is one of the reasons why it is such a vital molecule for life. The uniqueness of water with regards to its properties and dipolar nature is given above.

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6 molecule of Fe\(_3\)(PO\(_4\))\(_2\) contains 78 atoms. Therefore, the correct option is option C among all the given options.

The smallest unit of matter that may be split without producing electrically charged particles is the atom. It is also the smallest piece of substance with chemical element-like characteristics. As a result, the atom serves as the fundamental unit of chemistry.

Space makes up the majority of an atom. The remainder is made up of a cloud of electrons with negative charges around a positive-charged nucleus made up of protons and neutrons. Compared to electrons, that are the smallest charged particles in nature, the nucleus is tiny and dense.

1 molecule of Fe\(_3\)(PO\(_4\))\(_2\) contains 13 atoms

6 molecule of Fe\(_3\)(PO\(_4\))\(_2\) contains 13×6=78 atoms

Therefore, the correct option is option C.

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