how many moles of sulfuric acid are contained in 100.0 ml of a 2.24 m sulfuric acid solution?

Answer:

Well what are the numbers but ik that it ius 5

Explanation:

17.40 sec is the time will take to smell second perfume after diffusion takes place

Acc. to Graham's law of Diffusion

Diffusion of Gas inversely proportional to square root of its Molecular mass.

rb (Perfume B)

ra(perfume A)

= \(\sqrt{\frac{Ma}{Mb} }\) its equation (1)

Give molar mass of Perfume A = 275 g/mol

molar mass of Perfume B= 205g/mol putting value in (1)

» \(\frac{rb}{ra}=\sqrt{\frac{275}{205} }\)

\(\frac{rb}{ra} =1.16\) its eq (2)

» Perfume B will defuse 1:16 times faster than perfume A.

Hence, perfume B will be first smelled by Person.

Sf Equal volume V of two goes diffuse in t1 and t2 sec. respectively ton

\(\frac{ra}{rb}=\frac{tb}{ta}\)

Now,, from eq(2) toto

1/1:15 = \(\frac{tb}{ta}\)

ta

Given tb =the smell of Perfume B as it diffuse faster  

ta= 1.15 x 15 see  

=ta2=17.40 sec

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Answer:

As you go up the fractionating column, the hydrocarbons have: lower boiling points lower viscosity (they flow more easily) higher flammability (they ignite more easily) This means that in general hydrocarbons with small molecules make better fuels than hydrocarbons with large molecules.

Explanation:

i guess it's through thousands of research and experiments they conducted

C. If  blood pressure decreases, filtration in the kidneys decreases.

D. If more blood returns to the heart, the ventricles contract more forcefully to pump it out, and this raises blood pressure.

The maintenance of blood pressure is defined as the high use of sodium in your diet and the low use of potassium in your diet can cause hypertension. It is also important to use those foods which are free from fats. It is also important that we should use fruits, vegetables, and grains in excessive amounts for the maintenance of blood pressure and for a healthy diet.

High blood pressure 190/110 mm Hg can cause the main vital organs of the body like the brain, heart, and kidney too. There are three factors that contribute to blood pressure which are resistance, blood viscosity, and blood vessel diameter.

So we can conclude that blood pressure is the pressure of circulating blood against the walls of the blood vessels.

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Which of the following statements are true of the maintenance

of blood pressure (BP)? (Read carefully and select all of the correct statements.)

A. Norepinephrine stimulates vasoconstriction in skin, viscera, and skeletal muscles, all of which lower BP.

B. Aldosterone stimulates the reabsorption of Na+ ions by the kidneys, which lowers BP.

C. If BP decreases, filtration in the kidneys decreases.

D. If more blood returns to the heart, the ventricles contract more forcefully to pump it out, and this raises BP.

E. If BP decreases, the kidneys secrete the enzyme renin, which stimulates the secretion of epinephrine to prevent a further decrease.

F. The hormone ANP increases the excretion of K+ ions by the kidneys, which helps conserve water and raise BP.

G. The hormone ADH helps the kidneys conserve water and helps prevent a decrease in BP.

H. The elasticity of the large arteries helps decrease diastolic BP.

The green wavelength is absorbed by the medium hence it does not appear.

We know that absorption has to do with the process by which the atom is able to take in energy and this would lead to the upward movement of the electrons that are in the atom.

Thus the wavelengths that can be taken in by the atom as it is absorbing energy can be seen in the absorption spectrum. It is also possible to have gaps in the absorption spectrum due to absorption by the medium.

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The periodic table has changed very little since it was originally developed by Mendeleev and Meyer is referred to as a false statement.

This is defined as the arrangement of elements based on their atomic number in a tabular form. It consists of 18 vertical columns which re referred to as groups and seven horizontal rows called period.

Henry Moseley in 1913 organized Mendeleev's periodic table based on physical properties.This took into consideration their atomic number rather than atomic mass and other missing elements.

This is the periodic table which is used currently and therefore hasn't changed much which is why false was chosen.

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About  739,982.4 Joules energy is required to raise the temperature of 100.0 grams of water from -269 degrees Celsius to 1500 degrees Celsius.

The formula for the change in heat is,

Q = mcΔT, the amount of energy required is Q, m is the mass of water, specific heat capacity of water is c, the change in temperature is ΔT,

ΔT = 1500°C - (-269°C)

ΔT = 1769°C

Next, we can look up the specific heat capacity of water, which is 4.184 J/g°C. Then, we can substitute the values into the formula,

Q = 100.0 g * 4.184 J/g°C * 1769°C

Q = 739,982.4 J

Therefore, it would require 739,982.4 Joules of energy to raise the temperature of 100.0 grams of water from -269 degrees Celsius to 1500 degrees Celsius.

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The description of the molecules shown is it is unsaturated alkynes. The correct option is A.

Alkynes are unsaturated double bond containing compound that react with hydrogen when a catalyst is present.

The pie bond shows that the hydrogen atoms are lost from the alkanes.

Thus, the correct option is A, unsaturated alkynes.

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The main reservoirs of the carbon cycle are the atmosphere, oceans, land (including vegetation and soils), and fossil fuels. In these reservoirs, carbon exists in both inorganic and organic forms.

The inorganic carbon cycle involves the exchange of carbon dioxide (CO2) between the atmosphere and oceans through processes like photosynthesis and respiration.

Organic carbon, on the other hand, is found in living organisms, dead organic matter, and soil organic matter. It is cycled through processes such as decomposition and consumption by organisms. The interactions between the inorganic and organic carbon cycles occur primarily in the biosphere, where photosynthesis converts inorganic carbon into organic carbon compounds. While inorganic carbon is primarily in the form of CO2, organic carbon is present in complex organic molecules. Both forms of carbon play crucial roles in energy transfer, nutrient cycling, and climate regulation.

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Answer:

3 sometimes 4

Explanation: there are usualy

3 layers of paint but sometime manufacterers add paint protection film to bring the total up to 4

Explanation:

when some sunlight reaches the moon, the sunlight passes through earth's atmosphere, which causes earth's atmosphere to filter out most of the blue light, so it'll be "The sun blocks the moons light" it seems reasonable to the Explanation above, as the sunlight surpasses the moon leading to a lunar eclipse. This is what I personally think.

Option (d), P=ATC=MR=MC, accurately represents the long-run equilibrium condition for perfect competition, reflecting the balance between price and cost for firms operating in a competitive market.

The long-run equilibrium condition for perfect competition is that price (P) is equal to average total cost (ATC), which is also equal to marginal cost (MC), and marginal revenue (MR).

Option (d), P=ATC=MR=MC, best represents the long-run equilibrium condition for perfect competition. In perfect competition, firms operate at the minimum point of their average total cost curve, where price equals both average total cost and marginal cost. This condition ensures that firms are earning zero economic profit and are producing at an efficient level.

In the long run, if firms are earning economic profit, new firms will enter the market, increasing competition and driving prices down. Conversely, if firms are experiencing losses, some firms may exit the market, reducing competition and causing prices to rise. This process continues until firms reach a state where price equals average total cost, marginal cost, and marginal revenue, ensuring a long-run equilibrium.

Therefore, option (d), P=ATC=MR=MC, accurately represents the long-run equilibrium condition for perfect competition, reflecting the balance between price and cost for firms operating in a competitive market.

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Answer:

I think it would be b

Explanation:

pls correct me if im wrong!

Answer:

The pattern of change in the electron configuration increases from left to right across the period.

Explanation:

In the periodic table, elements having the same number of electrons in the outermost shell of their atoms are placed over one another in vertical columns. Each of the vertical columns is known as a group or family. while each of the resulting horizontal rows is known as a period or row.

There are 18 vertical columns and seven periods in the periodic table. Each period begins with an atom having a valence electron and ends with an atom having a complete outer shell structure of an inert gas.

The fourth period of the periodic table (d-block) consists of the transition elements.

The electron distribution into the energy levels of sublevels of atoms  can be shown in any of the tree important electronic configuration.

Electronic configuration shows the sequence of filling electrons into the orbitals of the sublevels as guided by some principles.

The maximum number of electrons in the orbitals of sublevels are two for s-sublevel(one orbital) ; six for p-sublevel( three orbital); ten for d-sublevel ( five orbitals) and fourteen for f-sublevel( seven orbitals). This indicates that the maximum number of electrons in an orbital is two

In the Periodic table ,The sublevels with lower energies are filled  up before those with higher energies. One important thing about this principle is that the sublevels do not fill up in numerical order. The pattern of filling is as follows:

1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d, 5p, 6s, 4f, 5d, 6p, 7s, 5f etc.

Answer:

In the electron configuration of potassium, I observe that after the 3p orbital is filled, the next electron enters the 4s orbital instead of the 3d orbital because 3d is at a higher energy than 4s. This pattern shows that orbitals fill up according to the Aufbau principle. As I move on right, the number of electrons increases by one for each element until vanadium is reached. The electron configuration of chromium shows all Half-filled orbitals in the 4s and 3d energy levels. Again, as I move right, an exception occurs at copper. Copper’s electron configuration shows completely filled 4s and 3d orbitals. This is an exception to the Aufbau principle to attain more stable electron configurations, whenever possible. Half-filled electron configurations are more stable than other configurations and completely filled electron configurations are the most stable.

When completely burned in excess oxygen gas, which of the following would produce the least mass of CO2 among (a) 10.0 g CH4, (b) 10.0 g CH3OH, (c) 10.0 g C2H4, (d) 10.0 g C2H6, and (e) 10.0 g C4H5OH?If a substance is burned completely in excess oxygen, it undergoes complete combustion, which means that it is oxidized to the highest possible oxidation state.

Furthermore, when a substance is completely burned, all of its carbon and hydrogen is transformed into carbon dioxide and water, respectively. The amount of carbon dioxide generated is proportional to the amount of carbon in the molecule, and the amount of water generated is proportional to the amount of hydrogen in the molecule. The chemical equations for the complete combustion of the given substances are: (a) CH4 + 2O2 → CO2 + 2H2O (b) CH3OH + 3O2 → 2CO2 + 4H2O (c) C2H4 + 3O2 → 2CO2 + 2H2O (d) C2H6 + 3.5O2 → 2CO2 + 3H2O (e) C4H5OH + 7O2 → 4CO2 + 3H2OTherefore, we must compute the mole fraction of carbon in each substance to determine which of the given substances would produce the least mass of CO2.

Here's how to calculate the mole fraction of carbon in each substance:(a) 10.0 g CH4: 10.0 g CH4 × (1 mol CH4/16.04 g CH4) × (1 mol C/1 mol CH4) = 0.6249 mol C (b) 10.0 g CH3OH: 10.0 g CH3OH × (1 mol CH3OH/32.04 g CH3OH) × (1 mol C/1 mol CH3OH) = 0.3121 mol C (c) 10.0 g C2H4: 10.0 g C2H4 × (1 mol C2H4/28.05 g C2H4) × (2 mol C/1 mol C2H4) = 0.7113 mol C (d) 10.0 g C2H6: 10.0 g C2H6 × (1 mol C2H6/30.07 g C2H6) × (2 mol C/1 mol C2H6) = 0.6650 mol C (e) 10.0 g C4H5OH: 10.0 g C4H5OH × (1 mol C4H5OH/96.10 g C4H5OH) × (4 mol C/1 mol C4H5OH) = 0.4161 mol C. Since all of the substances are burned completely, the amount of carbon dioxide generated is proportional to the mole fraction of carbon, which means that the substance with the least mole fraction of carbon would generate the least mass of carbon dioxide.

We can calculate the mass of carbon dioxide produced by each substance using their respective mole fractions of carbon and the molar mass of carbon dioxide (44.01 g/mol): (a) 0.6249 mol C × (1 mol CO2/1 mol C) × (44.01 g CO2/1 mol CO2) = 27.51 g CO2 (b) 0.3121 mol C × (1 mol CO2/1 mol C) × (44.01 g CO2/1 mol CO2) = 13.73 g CO2 (c) 0.7113 mol C × (1 mol CO2/1 mol C) × (44.01 g CO2/1 mol CO2) = 31.28 g CO2 (d) 0.6650 mol C × (1 mol CO2/1 mol C) × (44.01 g CO2/1 mol CO2) = 29.28 g CO2 (e) 0.4161 mol C × (1 mol CO2/1 mol C) × (44.01 g CO2/1 mol CO2) = 18.30 g CO2. Therefore, the answer is (b) 10.0 g CH3OH, which would generate the least mass of CO2 if completely burned in excess oxygen gas.

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Answer:

Density, \(d=0.82\ g/cm^3\)

Explanation:

It is given that,

Mass of an unknown liquid, m = 20.5 g

The volume of unknown liquid is 25 mL

We need to find the volume of the brass object. Mass per unit volume of an object is called its density.

We know that, 1 mL = 1 cm³

So, 25 mL = 25 cm³

\(d=\dfrac{m}{V}\)

Putting the values, we get :

\(d=\dfrac{20.5\ g}{25\ cm^3}\\\\d=0.82\ g/cm^3\)

So, the density of this substance is \(0.82\ g/cm^3\)

Answer:

false, Rutherford's experiment proved the nucleus being positive and dense.

Answer:

a i believe

Explanation:

a

Based on the available resources and profit per unit, producing 266 units of Product 1 would result in the highest total profit of BD 585.20.

To determine the maximum number of units of each product that can be produced given the available resources, we need to compare the resource requirements of the products with the available resources.

Let's calculate the resource requirements for each product:

Product 1:

- Metal sheet: 0.250 m2 per unit

- Glass sheet: 0.120 m2 per unit

- Electrical components: 3 units per unit

Product 2:

- Metal sheet: 0.150 m2 per unit

- Glass sheet: 0.050 m2 per unit

- Electrical components: 2 units per unit

Now let's compare the resource requirements with the available resources:

Metal sheets:

- Product 1 requires 0.250 m2 per unit, so the maximum number of units that can be produced using available metal sheets is 90 m2 / 0.250 m2 = 360 units.

- Product 2 requires 0.150 m2 per unit, so the maximum number of units that can be produced using available metal sheets is 90 m2 / 0.150 m2 = 600 units.

Glass sheets:

- Product 1 requires 0.120 m2 per unit, so the maximum number of units that can be produced using available glass sheets is 30 m2 / 0.120 m2 = 250 units.

- Product 2 requires 0.050 m2 per unit, so the maximum number of units that can be produced using available glass sheets is 30 m2 / 0.050 m2 = 600 units.

Electrical components:

- Product 1 requires 3 units per unit, so the maximum number of units that can be produced using available electrical components is 800 units / 3 units = 266 units.

- Product 2 requires 2 units per unit, so the maximum number of units that can be produced using available electrical components is 800 units / 2 units = 400 units.

Now let's determine the maximum number of units that can be produced for each product based on the limiting resource:

Metal sheets: The maximum number of units that can be produced is 360 units (for Product 1) since it requires a larger area of metal sheets.

Glass sheets: The maximum number of units that can be produced is 250 units (for Product 1) since it requires a larger area of glass sheets.

Electrical components: The maximum number of units that can be produced is 266 units (for Product 1) since it requires a larger number of electrical components.

Since the limiting resource for all three resources is reached with Product 1, the maximum number of units that can be produced for Product 1 is 266 units. As for Product 2, it can be produced up to a maximum of 250 units.

Now let's calculate the profit for each product:

Profit per unit for Product 1: BD 2.200

Profit per unit for Product 2: BD 1.400

Total profit for Product 1: 266 units × BD 2.200 = BD 585.20

Total profit for Product 2: 250 units × BD 1.400 = BD 350.00

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Answer:

LiOH

Explanation:

Among the following LiOH or lithium hydroxide is a Arrhenius base as it increase hydroxide ion concentration of a substrate.

According to the Arrhenius concept, base is defined as a substance which yields hydroxyl ions on dissociation.These ions react with the hydrogen ions of acids to produce salt in an acid-base reaction.

Bases have a pH higher than seven as they yield hydroxyl ions on dissociation.They are soapy in touch and have a bitter taste.According to the Lowry-Bronsted concept, base is defined as a substance which accepts protons .Base react violently with acids to produce salts .Aqueous solutions of bases can be used to conduct electricity .They can also be used as indicators in acid-base titrations.

They are used in the manufacture of soaps,paper, bleaching powder.Calcium hydroxide ,a base is used to clean sulfur dioxide gas while magnesium hydroxide can be used as an antacid to cure acidity.

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The reaction begins with the deprotonation of the carbonyl compound by the hydroxide ion, resulting in the formation of a negatively charged enolate ion.

This enolate ion can act as both a nucleophile and a base. The nucleophilic enolate attacks the carbonyl carbon of another aldehyde or ketone molecule, leading to the formation of a β-hydroxyaldehyde or β-hydroxyketone intermediate. The β-hydroxyaldehyde or β-hydroxyketone intermediate can then undergo dehydration, either spontaneously or with the help of an acid catalyst, to yield an α,β-unsaturated aldehyde or ketone. This compound contains a double bond between the α and β carbon atoms.

Overall, the self-condensation reaction allows aldehydes and ketones to undergo a nucleophilic addition followed by an elimination, resulting in the formation of a more complex molecule. It is important to note that not all aldehydes and ketones undergo self-condensation, as the presence of suitable α-hydrogens is necessary for this reaction to occur.
In summary, the basic conditions facilitate the self-condensation of aldehydes and ketones by promoting the deprotonation of the carbonyl compound, leading to the formation of an enolate ion that can act as both a nucleophile and a base. The reaction proceeds through the formation of a β-hydroxyaldehyde or β-hydroxyketone intermediate, which then undergoes dehydration to yield an α,β-unsaturated aldehyde or ketone.

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Answer:

density =mass/volume

=276.3/250

=1.105g/ml

1) list your givens and convert if necessary

P₁ = 200 kPa

V₁ = 4.000 × \(10^{3}\) L

T₁ = 298.15 K

P₂ = 200 kPa

V₂ = ?

T₂ = 268.15 K

2) rearrange formula

\(\frac{P_{1}V_{1}}{T_{1}}=\frac{P_{2}V_{2}}{T_{2}}\\\\V_{2}=\frac{T_{2}P_{1}V_{1}}{P_{2}T_{1}}\)

3) solve

\(V_{2}=\frac{(268.15\ K)(200\ kPa)(4.000\ x\ 10^{3} L)}{(200\ kPa)(298.15\ K)}\)

V₂ = 3597.518028 L (round as you wish)

Answer:

3.24

Explanation:

It is known that nitric acid is a strong acid, so it will dissociate completely, resulting in \(H^+\) and \(NO_3^-\) ions being present in solution. We also know that pure water has a neutral pH due to the chemical equilibrium of \(H_2O(l)\) ⇄ \(H^+(aq) + OH^-(aq)\) signifying equal parts of hydrogen and hydroxide ions.

Now, we must convert from 4.5 moles of nitric acid to moles of hydrogen. This can be accomplished using unit conversions and the chemical dissociation equation \(HNO_3(s) - > H^+(aq) + NO_3^-(aq)\)

\(4.5molHNO_3 * \frac{1 mol H}{1 mol HNO_3} = 4.5molH+\)

Then, using the pH equation \(-log[H+] = pH\) and the formula for molarity \(M = \frac{g}{L}\), we can find the value of \([H^+]\) and in turn the pH of the resulting solution. Keep in mind that both answers for grams of the hydrogen ion and molarity of the hydrogenion should have two significant figures.

\(4.5mol H^+ * \frac{1.01gH^+}{1 mol H^+} = 4.6g H^+\\\frac{4.6gH^+}{8000L sol} = 5.8*10^{-4} M H^+\)

Now the pH equation may be used.

\(-log(5.8*10^{-4}) = 3.24\)

Note that logarithmic significant figures dictate that the logarithm of a number with x significant figures will result in a value with x digits after the decimal point, meaning that this answer will have two digits after the decimal point and three significant figures.

All of these are not fit for human consumption and shouldn't be used with food, including pewter (which may include some copper, silver, or lead), copper, zinc, and galvanized goods,.

Elegant pewter pitchers are great for pouring iced coffee, crushed ice, and possibly even wine. Every single one of our handcrafted pewter pitchers is created using traditional techniques. They continue to be lead-free, just like all of your other pewter goods.

Today's pewter is safe to use and lead-free. It is mostly formed of tin, with perhaps a little amount of copper and antimony. The items have received certification stating that they are fully lead-free and safe to use with any type of food.

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