A stream's discharge is: Group of answer choices the volume of water passing a fixed point per unit time

ANSWER

option A and B

EXPLANATION

An increase in temperature will increase the average kinetic energy of the molecule, thereby increasing the frequency of collision.

The correct answer are option A and B

Heliocentric model of the solar system state the sun is assumed to lie at or near a central point and the earth and other bodies revolve around it.

Heliocentrism is the astronomical model developed by Nicolaus Copernicus and published in 1543 and this model postulate that the sun at the center of the universe with Earth and the other planets orbiting around it in circular paths and main heliocentric means earth revolve around the sun is called as heliocentric theory

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Answer: Structure: Our current model of the atom can be broken down into three constituents parts – protons, neutron, and electrons. Each of these parts has an associated charge, with protons carrying a positive charge, electrons having a negative charge, and neutrons possessing no net charge.

Answer:

A hot air balloon taking off

Explanation:

Among the given gases, the gas that shows the greatest deviation from ideal behavior at 25 degrees Celsius and 1 atm is likely to be H2 (hydrogen).

1. Size and shape of molecules: Hydrogen gas (H2) consists of diatomic molecules that are very small in size. The size of the hydrogen molecule is relatively larger compared to other gases such as CH4 (methane), SO2 (sulfur dioxide), and O2 (oxygen). The small size of hydrogen molecules leads to a higher probability of molecular interactions and deviations from ideal behavior.

2. Intermolecular forces: Hydrogen gas has relatively weak intermolecular forces compared to other gases. Although it exhibits London dispersion forces, these forces are not as strong as the dipole-dipole interactions in molecules like SO2 and CH4 or the formation of double bonds in O2. The weaker intermolecular forces in hydrogen contribute to larger deviations from ideal behavior.

Based on the size and shape of molecules as well as the strength of intermolecular forces, hydrogen gas (H2) is expected to show the greatest deviation from ideal behavior among the given gases at 25 degrees Celsius and 1 atm.

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The main benefit of using corn-based ethanol in the United States is its potential to reduce dependence on fossil fuels and promote energy security.

Ethanol, also known as ethyl alcohol or grain alcohol, is a colorless and flammable liquid compound. It is a type of alcohol that is produced through the fermentation of sugars by yeast or bacteria. Ethanol has been used by humans for thousands of years for various purposes, such as a solvent, disinfectant, and recreational beverage.

Ethanol is commonly found in alcoholic beverages such as beer, wine, and spirits. It is also used as a fuel additive or alternative fuel in the form of bioethanol, which is derived from renewable sources such as corn, sugarcane, or cellulosic materials. As a fuel, ethanol is blended with gasoline to reduce emissions and enhance octane ratings. In addition to its use in beverages and fuel, ethanol has industrial applications as a solvent in the production of perfumes, pharmaceuticals, and personal care products.

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Answer:

In general, electrons can be shared between atoms (a molecular bond) or electrons can be completely removed from one atom and given to another (an ionic bond). ... Water is a molecule because it contains molecular bonds. Water is also a compound because it is made from more than one kind of element (oxygen and hydrogen).

Explanation:

Answer:

A composite material is a material made from two or more constituent materials with significantly different physical or chemical properties that, when combined, produce a material with characteristics different from the individual components.

Explanation:

you're welcome

The normal freezing point of 0.22 m NaCl(aq), assuming it undergoes complete dissociation, is - -0.97 °C.

The freezing point constant of water is 1.86 K · kg/mol.The normal boiling point of a solution is determined by its concentration. The normal boiling point is equal to the boiling point of the pure solvent.

According to Raoult's law, the vapor pressure of a solution is proportional to the mole fraction of the solvent in the solution.The formula to find the change in boiling point of a solution is ΔTb = Kb · m. The formula to find the change in freezing point of a solution is ΔTf = Kf · m.

Here, the solution is NaCl(aq) and the concentration of the solution is 0.22 m. Since NaCl is an ionic compound, it undergoes complete dissociation into its ions in water. Therefore, the number of particles in solution is double the concentration of NaCl.

The concentration of particles in solution is 2 × 0.22 = 0.44 m.Using the formula ΔTf = Kf · m, we can find the change in freezing point of the solution. ΔTf = 1.86 K · kg/mol × 0.44 mol/kg = 0.8184 K.

Since the normal freezing point of pure water is 0 °C or 273 K, the new freezing point is 273 K - 0.8184 K = 272.18 K or -0.97 °C.The answer is -0.97 °C.

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The pressure changes from 100 kPa to 90 kPa, and the volume changes from 2.50 L to 3.75 L, the temperature changes from 303 K to 331.35 K.

To determine the temperature change when the pressure changes from 100 kPa to 90 kPa, we can use the combined gas law. The combined gas law states that the pressure, volume, and temperature of a gas are related by the equation:

(P₁ * V₁) / T₁ = (P₂ * V₂) / T₂

where P₁ and P₂ are the initial and final pressures, V₁ and V₂ are the initial and final volumes, and T₁ and T₂ are the initial and final temperatures.

Plugging in the given values, we have:

(100 kPa * 2.50 L) / 303 K = (90 kPa * 3.75 L) / T₂

Solving for T₂, we have:

T₂ = (90 kPa * 3.75 L * 303 K) / (100 kPa * 2.50 L)

T₂ ≈ 331.35 K

Therefore, when the pressure changes from 100 kPa to 90 kPa, and the volume changes from 2.50 L to 3.75 L, the temperature changes from 303 K to approximately 331.35 K. The temperature change can be determined using the combined gas law, which considers the inverse relationship between pressure and volume, and the direct relationship between temperature and volume, assuming the amount of gas and the gas constant remain constant.

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Answer:

Chemical equations are symbolic representations of chemical reactions in which the reactants and the products are expressed in terms of their respective chemical formulae. The equation in which the number of atoms of all the molecules is equal on both sides of the equation is known as a balanced chemical equation.

Given equation is Ca(OH)2+CO2 → CaCO3 + H2O

The equation is balanced.

Insoluble milky white precipitate of calcium carbonate and water is produced when calcium hydroxide reacts with carbon dioxide gas. The reaction follows a double displacement reaction.

Explanation:

There are two types of chemical compound one is covalent compound and other is ionic compound, covalent compound formed by sharing of electron and ionic compound formed by complete transfer of electron. Therefore, the correct option is option 2.

Chemical Compound is a combination of molecule, Molecule forms by combination of element and element forms by combination of atoms in fixed proportion.

An ionic compound is a metal and nonmetal combined compound.  Ionic compound are very hard. They have high melting and boiling point because of strong ion bond.

The balanced equation can be written as

CaO + 3C → CaC\(_2\) + CO

CO is likely to have different chemical properties than CaO( calcium oxide)

Therefore, the correct option is option 2.

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Nuclear magnetic resonance spectroscopy (NMR) is used to study the electronic environment of atoms and the bonding nature of a compound.

The number of different signals observed in the 1H NMR spectra of the given compounds are as follows: Compound A: 10 signals, Compound B: 6 signals ,Compound C: 4 signals Compound D: 6 signals ,Compound E: 9 signals, Compound F: 3 signals

In proton nuclear magnetic resonance spectroscopy (1H NMR), the magnetic field strength and electronic environment of the protons influence the chemical shifts. The shielding effect or deshielding effect of the nearby atoms, bond length, and bond angle, among other factors, all influence the chemical shifts. There are five different types of proton environments, which correspond to five different chemical shifts, in this case: Type 1: Hydrogen atoms that are covalently bonded to sp3 hybridized carbons. Type 2: Hydrogen atoms that are covalently bonded to sp2 hybridized carbons. Type 3: Hydrogen atoms that are covalently bonded to sp hybridized carbons. Type 4: Hydrogen atoms that are covalently bonded to aromatic carbons. Type 5: Hydrogen atoms that are directly bonded to electronegative elements such as nitrogen, oxygen, or halogens.

Here, to determine the number of signals expected in the 1H NMR of the compounds. Compound A: 10 different proton environments => 10 signals. Compound B: 6 different proton environments => 6 signals. Compound C: 4 different proton environments => 4 signals. Compound D: 6 different proton environments => 6 signals. Compound E: 9 different proton environments => 9 signals. Compound F: 3 different proton environments => 3 signals.

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Answer:

20 cm

Explanation:

so if it goes 2 cm per minute and it goes for ten minutes then the equation

would be 10x2=20

so 20 is the answer

Hope this helps :))

Answer:

20 cm

Hope this helps

Sorry if it is wrong

Answer:

1,260 is your answer plz mark if this right

Explanation:

Answer:

1260

Explanation:

way to much

Answer:

Heat = 3138J

Explanation:

In the system, the sample of Copper is releasing heat that produce the increasing in the temperature of water.

Using the equation of calorimeter, we can find the heat released for the sample of copper (The same that is absorbed for the water):

Q = C×m×ΔT

Where Q is heat, C is specific heat (For water: 4.184J/molK), m is the mass of water (50g) and ΔT is change in temperature of water (40°C-25°C = 15°C)

Replacing:

Q = 4.184J/molK×50g×15°C

Q = 3138J is the heat released for the sample of Copper (The same absorbed for the water).

Answer:

heat=3138j

Explanation:

In the system, the sample of Copper is releasing heat that produce the increasing in the temperature of water.

Using the equation of calorimeter, we can find the heat released for the sample of copper (The same that is absorbed for the water):

Q = C×m×ΔT

Where Q is heat, C is specific heat (For water: 4.184J/molK), m is the mass of water (50g) and ΔT is change in temperature of water (40°C-25°C = 15°C)

Replacing:

Q = 4.184J/molK×50g×15°C

Q = 3138J is the heat released for the sample of Copper (The same absorbed for the water).

Answer:

Lead(IV) iodide

Explanation:

Answer:

Plasmid #50548

Explanation:

• given that volume = 230ml ,therefore mass of water = 230g

• ∆T = Tfinal-Tinitial =30.5-22.9 = 7.6°C

• Specific heat capacity of water , C= 4.184J/°C*g

• Therefore , q = mass* C * ∆T

= 230 * 4.184 * 7.6

=7313.6 J /1000

q= 7.314KJ

• given : mass of methanol burned = Mass F-Mass initial

=(2.51-1.65) = 0.86 g

• So ,moles of methanol , n = mass methanol/Mol. mass methanol

= 0.86g/32.04g/mol

=0.027 moles

• Finally , ∆H = q/n

= 7.314KJ / 0.027mol

=270.85KJ/mol

• However, this is an exorthemic reaction, heat is lost through combustion, our molar enthalpy should be negative.

Answer:

In order to determine the concentration of an unknown H3PO4 solution, the following data is required: Molarity of NaOH (standard solution)Volume of NaOH required to reach the endpoint of the titration Volume of H3PO4 solution used in the titration balanced equation

The balanced equation for the neutralization reaction of H3PO4 is: H3PO4(aq) + 3 NaOH(aq) → Na3PO4(aq) + 3 H2O(l)

Based on the balanced equation, it can be said that 1 mole of H3PO4 will react with 3 moles of NaOH, meaning that in order to completely react with a particular amount of H3PO4, 3 times the amount of NaOH must be added.

When NaOH is added to the H3PO4 solution, it reacts with the acid until all of it has been neutralized. At this point, the endpoint of the titration has been reached, indicating that the stoichiometric amount of NaOH has been added to the H3PO4 solution, and there is no more H3PO4 left to react. The number of moles of H3PO4 in the solution is equal to the number of moles of NaOH added to it.

The concentration of H3PO4 can be calculated as follows: concentration of H3PO4 = (moles of NaOH) / (volume of H3PO4 used in the titration)

In conclusion, to determine the concentration of an unknown H3PO4 solution, one must titrate it with a standardized NaOH solution and calculate the concentration of H3PO4 from the volume of NaOH used.

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Aphanitic and phaneritic are two different textures found in rocks, which are formed through different cooling processes.


Phaneritic texture: This texture is characterized by large, visible crystals that can be seen without magnification. It occurs when molten rock cools slowly deep within the Earth's crust. The slow cooling allows sufficient time for large crystals to grow. Granite and gabbro are examples of phaneritic rocks.

The key difference between these textures lies in the cooling rate. Aphanitic rocks cool quickly, resulting in small crystals, while phaneritic rocks cool slowly, allowing large crystals to form. The cooling rate is influenced by the depth of formation and the presence of water or other cooling agents.

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Answer:

Q.1

Given-

Volume of solution-1 L

Molarity of solution -6M

to find gms of AgNO3-?

Molarity = number of moles of solute/volume of solution in litre

number of moles of solute = 6×1= 6moles

one moles of AgNO3 weighs 169.87 g

so mass of 6 moles of AgNO3 = 169.87×6=1019.22

so you need 1019.22 g of AgNO3 to make 1.0 L of a 6.0 M solution

1. the grams of \(\rm AgNO_3\) is 1019.22.

2. 10,192.2

Molarity is the measure of the concentration of any solute in per unit volume of the solution.

1. Volume is 1.0 l.

Molarity of solution -6 m

To find the mass of \(\rm AgNO_3\)

\(\rm Molarity = \dfrac{n}{V}\\\\rm 6 = \dfrac{n}{1}\\\\n = 6 \times 1 = 6\)

Mass of One mole of \(\rm AgNO_3\) is 169.87 g

Therefore, the mass of 6 moles will be

169.87 × 6 = 1019.22

2. Molarity of solution 6.0

Volume of solution is 0.1m

The mass of 6 moles will be

169.87 × 6 = 1019.22

\(\rm density = \dfrac{mass }{volume} \\\\\rm density = \dfrac{1019.22 }{0.1} = 10,192.2\)

Thus, the options are 1. 1019.22    2. 10,192.2

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Answer:

gravity

is

workin

Explanation:

In the allyl cation, all the bond lengths are equal and the positive charge is delocalized over all the three carbon atoms.

The allyl cation has the formula C2H5+. In the allyl cation, the positive charge is delocalized over the three carbon atoms as shown in the image attached. Hence, relevant resonance structures can be proposed for the allyl cation.

The bond lengths in the allyl cation are intermediate between the bond lengths of double bonds and single bonds. All the bond lengths are equal.

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KF makes up 1.669 gms of the mixture's mass. The total of all the atomic masses or mass numbers of the constituent elements in a compound or molecule constitutes this quantity.

Given;

Total weight of mixture \($(L i F+K F)=5.97 \mathrm{gms}$\)

Let, mass of KF in the mixture be xg m s.

\($\Longrightarrow$\) mass of L i F$ in mixture = (5.97 - x) gms.

Note:

Atomic weight of F=19 gms.

Atomic weight of L i=7gms.

Atomic weight of K=39 gms.

moles = mass  molecular weight

Thus, moles of K F=x / 58

and moles of LiF = (5.97 - x) / 26

F atoms make up 1 mole in 1 mole of KF. Likewise, there are 1 mol of F atoms in 1 mol of LiF. Thus,

\($& \text { moles of } \mathrm{F} \text { in } K F=\text { molesof } K F=x / 58--(1) \\\)

\($& \text { moles of } \mathrm{F} \text { in } L i F=\text { molesof } L i F=(5.97-x) / 26--(2)\)

From (1) \& (2), we get;

Total moles of Fluorine = (x / 58) + ((5.97 - x) / 26)

Hence, total weight of Fluorine in sample = moles ×  Atomic weight

=((x / 58)+((5.97-x) / 26)) ×  19 gms

=3.90 gms .-\text {--(given) }

Now, solving the equation for x, we get;

26x + (5.97 ×  58) - 58x = 3.9 × 58 ×  26 / 19

22x = 346.26-309.537

Therefore, x = 36.723 / 22

=1.669 gms

Thus, mass of KF in the mixture is 1.669 gms

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Answer:

The faster the object falls the greater the air resistance. Terminal velocity is reached when the force due to air resistance (upward) equals the force due to gravity (downward). At terminal velocity there is no net force and therefore no further acceleration.

The frequency of a red laser that has a wavelength of 676 nm would be 4.43 x \(10^{14\) hertz.

The frequency and wavelength of a wave are related by the following equation:

λf = c

Where λ is the wavelength of the wave in meters, f is the frequency in Hertz, and c is the speed of light in a vacuum.

in this case, λ = 676 nm = 6.76 x \(10^{-7\) m

c = 299,792,458 m/s

Making f the subject of the formula:

f = c/λ

  = 299,792,458/6.76 x \(10^{-7\)

  = 4.43 x \(10^{14\) hertz

In other words, the frequency of a red laser that has a wavelength of 676 nm would be 4.43 x \(10^{14\) hertz.

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Answer:

The visual seems to be showcasing an erupting volcano, so I don't believe the two are related.

Explanation:

Answer:

\( \huge{5.77 \times {10}^{ - 5} m}\)

Explanation:

The wavelength of a wave can be found by using the formula

\(\lambda = \frac{c}{f} \\\)

where

c is the speed of the wave

f is the frequency

From the question we have

\( \lambda = \frac{3 \times {10}^{8} }{5.2 \times {10}^{ 12} } \\ \\ \\ \\ \large{ = 5.77 \times {10}^{ - 5} m}\)

Hope this helps you

The complete formula of the hydrated salt is  MgCl.5H₂O.

Hydrated salts are salts that contain molecules of water in the moles of the compound.

The water present in the hydrated is incorporated into the crystal structure of the compound.

The complete formula of the hydrated salt is given below:

mass of water = 25.290 - 23.491

mass of water = 1.38 g

moles of water = 1.38 / 18

moles of water = 0.076 moles

mass of anhydrous salt = 23.491 - 22.130

mass of anhydrous salt = 1.361 g

moles of anhydrous salt = 1.361 / 95

moles of anhydrous salt = 0.014 moles

Mole ratio = 0.076/0.014 : 0.014/0.014

Mole ratio = 5 : 1

The formula of the compound = MgCl.5H₂O

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