In a water molecule, oxygen attracts electrons more strongly
than the hydrogens do because an oxygen atom contains
more
in its nucleus.
Enter the answer

To solve this problem, we need to use the given thermochemical equation and the molar mass of ethane. First, we need to convert the given mass of ethane (4.79 g) to moles by dividing it by the molar mass of ethane: 4.79 g / 28.0 g/mol = 0.171 mol C2H4

The According to the balanced equation, 1 mol of C2H4 releases -1.39 x 10^3 kJ of heat. Therefore, 0.171 mol of C2H4 will release: 0.171 mol C2H4 x (-1.39 x 10^3 kJ/mol) = -237.09 kJ The negative sign indicates that the reaction releases heat (exothermic). So, the amount of heat released when 4.79 g of C2H4 reacts with excess oxygen is 237.09 kJ. Note: It's important to pay attention to the units and to make sure they cancel out appropriately. In this case, the units of grams and moles cancel out, leaving only kJ as the unit of heat released.

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Explanation:

During condensation reaction, two molecules combine to form a single molecule with the loss of a small molecule; in dehydration reaction, this lost molecule is water.

The reaction is a small molecule formed from the atoms removed from a single reactant molecule this reaction is knowing as condensation reaction.

Essentially, this is the reverse process of vaporization. In order for water vapor to undergo the process of condensation, which is the change from a gaseous state to a liquid state, it is necessary for a reduction in its temperature to occur until it reaches the dew point or an increase in the pressure to which it is subjected.

In this case the condensation reaction are when two molecules combine to form a single molecule with the loss of a small molecule, in dehydration reaction, this lost molecule is water.

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Acetic acid and sodium hydroxide used to make a buffer solution.

What is buffer solution?

buffer solution is a waterproof solvent based solution in  which consists of a mixture of  containing a weak acid and  the conjugate base of the weak acid, or a weak base of the solution and the conjugate acid of the weak base. They resist to a  change in pH upon to the  dilution or upon the addition of small amounts of a  acid/alkali to them. Buffer solution resist of a  change in pH when smallest amounts of a stronger acid or a stronger base are added.

Sol-Acetic acid is a weaker acid and  its conjugate base is the acetate anion. That's why the addition of the strong base, hydroxide, which neutralized half of a  acetic acid created a buffer and  solution because we are having  significant amounts of both acetic acid and its conjugate base, the acetate anion, in the solution.

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Answer:

Absolute humidity

Explanation:

Answer:

I don't no sorry. ਕਿਉੁਂਕਿ ਸਤਿ ਸਤਿ ਸਤਿ ਸਤਿ ਸਤਿ ਸਤਿ ਸਤਿ ਸਤਿ ਸਤਿ ਸਤਿ ਸਤਿ ਸਤਿ ਸਤਿ ਸਤਿ ਸਤਿ ਸਤਿ 478figxigxurRyyv ਸ੍

When it comes to fire suppression systems, there are several types available in the market, each with its own set of features and cost implications. The least expensive fire suppression system is usually a portable fire extinguisher.

Portable fire extinguishers are small and portable, making them an ideal choice for small fires that can be easily contained and extinguished. These fire extinguishers are usually filled with a dry chemical, water, or foam, and can be purchased for a relatively low cost.
However, when it comes to larger fires, such as those in commercial or industrial settings, portable fire extinguishers may not be sufficient. In these cases, a more robust fire suppression system is required. Some of the more expensive fire suppression systems include wet chemical systems, carbon dioxide systems, and clean agent systems. These systems can cost tens of thousands of dollars to install and maintain, making them a significant investment.
Overall, the least expensive fire suppression system is typically a portable fire extinguisher. However, it is important to consider the size and scale of your facility and the potential risks associated with a fire when selecting a fire suppression system. It is always best to consult with a fire safety expert to determine which fire suppression system is best suited for your needs and budget.

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Answer:

The growing human population is putting increasing demands on natural resources.

Explanation:

In an ecosystem, the most important reason for people to carefully manage natural resources is that the  growing human population is putting increasing demands on natural resources.

Ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other through nutrient cycles and flow of energy.

Energy enters the ecosystem through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other.As a result of this transfer of matter and energy takes place through the system .Living organisms also influence the quantity of biomass present.By decomposition of dead plants and animals by microbes nutrients are released back in to the soil.

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Answer

F) The pressure of a gas exerted on the walls of its container is inversely proportional to the volume of the gas when the temperature of the gas remains constant.

Explanation

Boyle's law states that the volume of a given mass of gas varies inversely with the pressure when the temperature is kept constant. An inverse relationship is described in this way. As one variable increases in value, the other variable decreases. He discovered that doubling the pressure of an enclosed sample of gas, while keeping its temperature constant, caused the volume of the gas to be reduced by half.

Answer:

Gold, Silver and Titanium

Explanation:

The most valuable metals in the list are:

Gold:

Its value makes it a good investment option. Gold can be used in many different ways, like in jewelry, electronics, medicine, etc.

Silver:

Similar to the case of gold, besides the common value of silver in jewelry, it can be also used in other ways, because it has a large thermal and electrical conductivity.

Finally, the titanium: It's price is actually close to the copper one, but for the cost of work with titanium (Titanium has a really large melting point, then melting it into ingots needs a lot of energy), the price of titanium is increased.

Answer:

I believe it is Avogadro's number: 6.022 × 10²³

Explanation:

One mole of a substance is equal to 6.022 × 10²³ units of that substance

The components that are common to both ATP and NAD are: adenine and ribose. Adenine and ribose are both found in ATP and NAD molecules.

ATP stands for Adenosine Triphosphate, which is the primary energy carrier in cells. ATP is an energy-rich molecule that stores energy that can be used by the cell. It is composed of three phosphate groups, an adenine base, and a ribose sugar.

NAD stands for Nicotinamide Adenine Dinucleotide, which is an electron carrier molecule that is involved in many cellular metabolic reactions. It is composed of two nucleotides (adenine and ribose) linked by two phosphate groups.

The oxidized form of NAD is NAD+ while the reduced form is NADH.

The components of ATP and NAD are: Adenine and ribose are the two components common to both ATP and NAD.

Other components are specific to each molecule, as follows: ATP components: Three phosphate groups An adenine base A ribose sugar NAD+ components: Nicotinamide (a type of vitamin B3)Adenine A ribose sugar Two phosphate groups.

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Answer:

The element that is commonly used to reduce iron oxide would be carbon.

Explanation:

:)

Iron oxide is reduced to a lower oxide or metal by gaseous carbon monoxide or solid carbon.

Reduction is defined as the chemical reaction which involves addition of hydrogen or removal of oxygen or gain of electrons.

For example,

2Na + H2 → 2NaH (addition of hydrogen)

CuO + H2 → Cu + H2O(removal of oxygen)

Fe3+ + e- → Fe2+ (gain of electron)

Above example of reduction reaction is when oxygen reacts with iron to form rust. In this reaction oxygen is reduced because it accepts electrons from iron, which is oxidized.

Thus, Iron oxide is reduced to a lower oxide or metal by gaseous carbon monoxide or solid carbon.

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111g of Fluorine gas is needed to react with 27.5g of Nitrogen gas

the chemical reaction between n2 and f2 : N2 +3F2 -> 2NF3

This means we need 3 moles of fluorine for every molecule of nitrogen gas.

1 mole of N2 = 27.5g

molar mass of N2 = 28g

Therefore 1 mole of N2= 27.5/28 g/mol = 0.98 mol

number of moles of F2 required are 3*0.98 = 2.94 moles

to convert moles to grams, multiply the number of moles of F2 by its molar mass = 2.94*38 = 111g.

Therefore 111g of Fluorine gas is needed to react with 27.5g of Nitrogen gas.

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Answer:

1.30 moles

Explanation:

As written, the molar mass of the fat is 770.5 g/mole.  Add all the C, H, and O's (I get C48H98O6) and multiply by the molar mass of each.  I obtain the 770.5 grams/mole figure, but would note that a more common fat is actually C3H5(OH(CH2)14(CH3))3 and not C3H5(OO(CH2)14(CH3))3.

Assuming C3H5(OO(CH2)14(CH3))3 is the correct structure, 1000g would mean 1000g/(770.5 g/mole) = 1.298 moles, or 1.30 moles to 2 sig figs.

Answer:Strontium-90 and cesium-137 have half-lives of about 30 years (half the radioactivity will decay in 30 years). Plutonium-239 has a half-life of 24,000 years. High-level wastes are hazardous because they produce fatal radiation doses during short periods of direct exposure.

Explanation:

In comparison to other toxic industrial waste, nuclear waste is neither exceptionally dangerous nor difficult to manage. It is technically possible to dispose of high-level radioactive waste safely. The toxic life of nuclear waste is 10,000 years. The correct option is B.

Waste is no longer dangerous if radioactive material has adequately decomposed. However, it will take the radioactive material between a few hours and hundreds of millions of years to decay.

Breeder reactors produce plutonium-239, which has a half-life of 24,400 years and is exceedingly hazardous in even minute amounts. Cesium-137 and strontium-190 are low-level radioactive wastes from typical nuclear power facilities.

Thus the correct option is B.

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Answer:

it is called the prevailing westerlies

Explanation:

Answer:

28.93 g/mol

Explanation:

This is an extension of Graham's Law of Effusion where \(\frac{R1}{R2} = \sqrt{\frac{M2}{M1} } = \frac{t2}{t1}\)

We're only talking about molar mass and time (t) here so we'll just concentrate on \(\sqrt{\frac{M2}{M1} } = \frac{t2}{t1}\). Notice how the molar mass and time are on the same position, recall effusion is when gas escapes from a container through a small hole. The time it takes it to leave depends on the molar mass. If the gas is heavy, like Xe, it would take a longer time (4.83 minutes). If it was light it would leave in less time, that gives us somewhat an idea what our element could be, we know that it's atleast an element before Xenon.

Let's plug everything in and solve for M2. I chose M2 to be the unknown here because it's easier to have it basically as a whole number already.

\(\sqrt{\frac{M2}{131} } = \frac{2.29}{4.83}\)

The square root is easier to deal with if you take it out in the first step, so let's remove it by squaring each side by 2, the opposite of square root essentially.

\((\sqrt{\frac{M2}{131} } )^2= (\frac{2.29}{4.83})^2\)

\({\frac{M2}{131} } = (0.47)^2\)

\({\frac{M2}{131} } = 0.22\)

M2= 0.22 x 131

M2= 28.93 g/mol

The volume occupy at 415K and 12.3atm is 37.25ml.

Ideal gas:

An ideal gas is a theoretical gas composed of many randomly moving point particles that are not subject to interparticle interactions. It is one for which both the volume of molecules and forces between the molecules are so small that they have no effect on the behavior of the gas.

Here we have to find the volume occupied.

The formula for an ideal gas:

P1 V1 / T1 = P2 V2 / T2

V2 = P1 V1 T2 / T1 P2

P1 = 14.8atm

P2 = 12.3atm

V1 = 23.5 ml

T1 = 315K

T2 = 415K

Now putting these values in the equation we get:

V2 = (14.8× 23.5 × 415)/ ( 12.3 × 315)

     = 144,337 / 3874.5

    = 37.25 ml

Therefore the 37.25ml is the volume.

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In a dissolving metal reduction, ammonia serves as a solvent, and each sodium atom acts as an electron donor. As a result, the alkyne is reduced to give an alkene product.

Dissolving metal reduction is a technique used to reduce alkynes to alkenes using an alkali metal, such as lithium or sodium, in liquid ammonia. During this process, the alkali metal dissolves in liquid ammonia to produce a deep blue color, which is a result of electrons being released from the alkali metal.

This process results in the formation of an intermediate solution containing free electrons that act as strong reducing agents, which can reduce the alkyne to an alkene. Therefore, in this reaction, ammonia serves as a solvent, while each sodium atom acts as an electron donor, leading to the reduction of the alkyne to form an alkene product.

Finally, we can say that in a dissolving metal reduction, ammonia serves as a solvent, and each sodium atom acts as an electron donor. As a result, the alkyne is reduced to give an alkene product.

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Answer:

sun gives you vitamin D

Explanation:

Our body creates vitamin D from direct sunlight on our skin when we're outdoors.

The given statement that "knowing the chemical properties of substances will tell you how the substance looks" is false becasue it tells you how these substances will react to other substances".

Chemical properties describe a substance's reactivity, flammability, stability, and other aspects related to its chemical behavior, but they do not describe its appearance. Physical properties, such as color, texture, shape, and size, are used to describe the appearance of a substance.

Therefore, knowing the chemical properties of a substance will not tell you how the substance looks.

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The chemical formula for octane, C8H18, is an alkane and a hydrocarbon. Its condensed structural formula is CH3(CH2)6CH3. The amount and location of branching in the carbon chain determine the various structural isomers of octane.

Carbon is represented by the letter C, octane by the formula C8H18. As a result, there will be 8 moles of carbon for every mole of C8H18.

Utilizing the molar mass of octane, convert 20 kg of octane to moles of octane.

Octane's molar mass is calculated as (8*12.011)+(18*1.008)=114.23 g/mole, where 8 and 18 are the molecule's atoms and 12.011 and 1.008 are the carbon and hydrogen atoms' individual molar masses.

20kg C8H18*1000g/kg*mole

C8H18/114.23g C8H18 = 175.1 moles of octane.

Put that quantity of moles into moles of carbon now:

1400.8 mole C is equal to 175.1 mole C8H18 * (8 mole C/mole C8H18).

Now keep in mind that a mole of a specific element equals 6.022*1023 atoms.

As a result, your final answer of 8.4*1026 atoms, or 1400.8 mole C, is identical to 1400.8*(6.022*1023) atoms C.

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Answer: mitochondria

Explanation:

it affects the cell because it produces the power of the cell, let me know if this helpes

Answer:

Its C

Explanation:

Ok. You really know how.

Answer:

the answer would be b

Explanation:

The correct answer is option C.  if you are looking for a non-dairy alternative to get the same amount of calcium as 8 oz of nonfat milk, canned sardines can be an excellent option.

which is 1.5 oz of canned sardines. Nonfat milk contains approximately 300 milligrams of calcium per 8-ounce serving. Sardines are an excellent source of calcium and a 1.5-ounce serving of canned sardines contains around 325 milligrams of calcium, which is equivalent to the calcium content in 8 ounces of nonfat milk.

Option A, 4.9 oz plain, nonfat yogurt, contains around 150 milligrams of calcium, which is less than half the amount present in 8 oz of nonfat milk. Option B, 4.9 oz Swiss cheese, contains around 270 milligrams of calcium, which is slightly less than the amount present in 8 oz of nonfat milk. Option D, 1 cup of lima beans, contains around 32 milligrams of calcium, which is a significantly lower amount than what is present in 8 oz of nonfat milk.

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There are two statements that correctly describe the process by which an ionic compound dissolves in water.

Firstly, the positive and negative ions dissociate from each other. Secondly, the negative ions are attracted to the partially negative O atom of the H2O while the positive ions are attracted to the partially positive H atom of the H2O. The attraction between the H2O molecules and the ions is stronger than the attraction of the ions for each other, which results in the compound dissolving completely into individual ions that remain in solution. The compound does not form pairs of oppositely charged ions that remain tightly attached.
In the process of an ionic compound dissolving in water, the positive and negative ions dissociate from each other. The negative ions are attracted to the partially positive H atoms of the H2O, while the positive ions are attracted to the partially negative O atom of the H2O. The attraction between the H2O molecules and the ions is stronger than the attraction of the ions for each other, allowing the compound to dissolve. The statement about forming pairs of tightly attached oppositely charged ions is incorrect, as ions disperse in water instead.

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Explanation:

The air around the equator has a high temperature, so it has a _lower_____ air pressure

Answer:

Too much nitrogen and phosphorus in the water causes algae to grow faster than ecosystems can handle. Significant increases in algae harm water quality, food resources and habitats, and decrease the oxygen that fish and other aquatic life need to survive.

Explanation:

Answer:

Dependent variable

Explanation:

In every experiment, there must be a dependent variable and an independent variable.

The independent variable is that variable that you have to manipulate in order to receive a response. E.g, in the experiment described in the question, the amount of sunlight a sunflower plant receives is the independent variable.

The dependent variable is the number of seeds produced. It is the response obtained by carefully manipulating the amount of sunlight