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Answer:

Around 129 galons

Explanation:

if you divied 3,241 by 4 you get 129 gallons but if you times that by 25 you get 3,225 so a little bit off but close.

Answer:

You have to remember this memory aid, diagonals and all.

You have to keep a tight tally of the electrons you’ve used so far so you don’t go over the number of electrons in the element you’re working on.

You have to remember how many electrons fit into each subshell (s, p, d, f).

It takes a lot of time, especially when the element has more than 20 electrons.

Explanation:

To determine the new volume of the gas when it is moved to standard temperature and pressure (STP), we can use the ideal gas law equation which says PV = nRT.

Where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature.

Given:

Initial volume (V1) = 25.0 mL = 25.0 cm³

Initial pressure (P1) = 125 kPa

Initial temperature (T1) = 293 K

Final pressure (P2) = standard pressure = 101.325 kPa

Final temperature (T2) = standard temperature = 273 K

First, we need to convert the initial volume from milliliters to liters:

V1 = 25.0 mL = 25.0 cm³ = 25.0 × 10^-3 L

Next, we rearrange the ideal gas law equation to solve for the new volume (V2) at STP:

V2 = (P1 × V1 × T2) / (P2 × T1)

Substituting the given values into the equation:

V2 = (125 kPa × 25.0 × 10^-3 L × 273 K) / (101.325 kPa × 293 K)

Simplifying the expression:

V2 ≈ 0.0719 L

Therefore, the new volume of the gas when it is moved to standard temperature and pressure would be approximately 0.0719 L. This calculation utilizes the ideal gas law to relate the initial and final conditions of pressure, volume, and temperature. By substituting the given values into the equation and performing the necessary calculations, we obtain the new volume at STP.

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Answer:

The simplest way to describe climate is to look at average temperature and precipitation over time. Other useful elements for describing climate include the type and the timing of precipitation, amount of sunshine, average wind speeds and directions, number of days above freezing, weather extremes, and local geography.

Explanation:

hope it helps

The total energy produced by the laser emitting 7.25 x 10¹⁷ photons with a wavelength of 450 nm can be calculated using the formula E = hc/λ.

The formula E = hc/λ relates the energy (E) of a photon to its wavelength (λ), where h is the Planck's constant (approximately 6.626 x 10⁻³⁴ J·s) and c is the speed of light (approximately 3.00 x 10⁸ m/s).

First, we need to convert the wavelength from nanometers to meters by dividing 450 nm by 10⁹. This gives us 4.50 x 10⁻⁷ m.

Next, we can calculate the energy of one photon using the formula E = hc/λ. Plugging in the values, we get E = (6.626 x  10⁻³⁴ J·s)(3.00 x 10⁸ m/s) / (4.50 x  10⁻⁷ m).

Simplifying the equation, we find E = 4.417 x 10⁻¹⁹ J.

To calculate the total energy produced, we multiply the energy per photon by the total number of photons: (4.417 x 10⁻¹⁹ J/photon)(7.25 x 10¹⁷ photons).

Calculating the expression, we get a total energy of approximately 3.207 x 10⁻¹ J.

Therefore, the total energy produced by the laser emitting 7.25 x 10¹⁷ photons with a wavelength of 450 nm is approximately 0.3207 J.

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Answer:

Explanation:

The new volume can be found by using the formula for Boyle's law which is

\(P_1V_1 = P_2V_2\)

Since we're finding the new volume

\(V_2 = \frac{P_1V_1}{P_2} \\\)

We have

\(V_2 = \frac{3.5 \times 6}{2.4} = \frac{21}{2.4} \\ = 8.75\)

We have the final answer as

Hope this helps you

To calculate the percent yield of silver in the reaction between copper metal and silver nitrate, we need to compare the actual yield of silver (4.57 g) to the theoretical yield of silver based on the stoichiometry of the reaction.

First, we need to determine the balanced chemical equation for the reaction. It is given as:

Cu + 2 AgNO3 → 2 Ag + Cu(NO3)2

From the balanced equation, we can see that 1 mole of copper reacts with 2 moles of silver nitrate to produce 2 moles of silver.

To find the theoretical yield of silver, we need to calculate the amount of silver that would be produced if all the silver nitrate reacted completely. We can do this by converting the mass of silver nitrate (12.7 g) to moles using its molar mass and then using the stoichiometry of the reaction to find the moles of silver produced.

The molar mass of AgNO3 is:

AgNO3: 107.87 g/mol + 14.01 g/mol + (3 * 16.00 g/mol) = 169.87 g/mol

Moles of AgNO3 = mass / molar mass

Moles of AgNO3 = 12.7 g / 169.87 g/mol ≈ 0.0748 mol

From the stoichiometry, we know that 1 mole of AgNO3 produces 2 moles of Ag. Therefore, the theoretical yield of silver would be:

Theoretical yield of Ag = 0.0748 mol AgNO3 * (2 mol Ag / 1 mol AgNO3) = 0.1496 mol Ag

Now we can calculate the percent yield using the actual yield and theoretical yield:

Percent yield = (Actual yield / Theoretical yield) * 100

Percent yield = (4.57 g / 0.1496 mol) * 100 ≈ 3055%

The percent yield of silver in this reaction is approximately 3055%. It is important to note that a percent yield greater than 100% suggests a potential error in the measurements or experimental procedure.

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Answer:

4.52 x 10¹⁴ cycles/s

Explanation:

From c = f·λ => f = c/λ = (3.0 x 10⁸ m/s)/(6.63 x 10⁻⁷m) = 4.52 x 10¹⁴ cycles/s.

f = frequency = ?

λ = wavelength = 6.63 x 10⁻⁷ meter

c = speed of light in vacuum = 3.0 x 10⁸ meters/s

A helium laser emits light with a wavelength of 6.33 x 10⁻⁷m.  The frequency is  4.74 x 10¹⁴ cycles/s.

Wavelength is defined as the separation between similar points (adjacent crests) in successive waves of a waveform signal that have traveled across space or along a wire. The length of a "sine wave's" shortest repeating segment is known as its wavelength. Sine waves can be combined to create any type of wave. That is, a Fourier analysis can be used to determine that every wave is made up entirely of sine waves.

Frequency is defined as the amount of times a repeated event occurs in one unit of time. Frequency can be expressed as

F = c / λ

Where c = speed if light = 3 x 10⁸ m/s

λ = wavelength = 6.33 x 10⁻⁷m given

F = 3 x 10⁸ / 6.33 x 10⁻⁷m

F = 4.74 x 10¹⁴ cycles/s.

Thus, a helium laser emits light with a wavelength of 6.33 x 10⁻⁷m.  The frequency is  4.74 x 10¹⁴ cycles/s.

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Answer:

They might not be bringing in enough oxygen from the air. It's hard to play soccer if you don't have enough oxygen in your cells. They might not be breaking down starch to make glucose.

Explanation:

\(4.05 * 10 ^{4}\)

To find the pressure in kPa we use the conversion

1 atm = 101.3 kPa

If 1 atm = 101.3 kPa

400 atm = 400 × 101.3 = 40520 kPa

Expressing it in standard form we have the final answer as

4.05 × 10⁴ kPa

Pressure (symbol: p or P) is the force applied perpendicular to the surface of an object per unit area over which that force is distributed. Pressure may also be expressed in terms of standard atmospheric pressure; the atmosphere (atm) is equal to this pressure, and the torr is defined as 1⁄760 of this. Manometric units such as the centimeter of water, millimetre of mercury, and inch of mercury are used to express pressures in terms of the height of column of a particular fluid in a manometer.

P = F / A

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Answer:

Acidic solutions are any solution that has a higher concentration of hydrogen ions than water; solutions that have a lower concentration of hydrogen ions than water are called basic or alkaline solutions.

Explanation:

Answer:

Where is the data table?

Answer:

sodium hydroxide

Explanation:

The common examples of Arrhenius base includes NaOH (sodium hydroxide), KOH (potassium hydroxide), Ca(OH)2 (calcium hydroxide), Mg(OH)2 (magnesium hydroxide), NH4OH (ammonium hydroxide), etc.Oct 21, 2020

2 moles of ammonia and 2.5 moles of oxygen gas will produce 2 moles of nitric oxide and 3 moles of water.

The reaction between ammonia (NH3) and oxygen gas (O2) to produce nitric oxide (NO) and water (H2O) is shown below:4NH3(g) + 5O2(g) → 4NO(g) + 6H2O(g)The balanced equation shows that 4 moles of ammonia react with 5 moles of oxygen gas to produce 4 moles of nitric oxide and 6 moles of water. To determine the amount of products formed when a certain amount of reactants is used, we need to use stoichiometry.Suppose we react 2 moles of ammonia with 2.5 moles of oxygen gas. From the balanced equation, we can see that the ratio of moles of ammonia to moles of oxygen gas is 4:5. Therefore, ammonia is the limiting reagent because only 2 moles of ammonia are available, which is not enough to react with 2.5 moles of oxygen gas.To determine the amount of products formed, we will use the mole ratio from the balanced equation:4 moles NH3 : 5 moles O2 : 4 moles NO : 6 moles H2O2 moles NH3 is equivalent to (5/4) × 2 moles O2 = 2.5 moles O2So, 2 moles NH3 + 2.5 moles O2 → 2 moles NO + 3 moles H2O.The number of significant digits in the answer will depend on the number of significant digits in the given amounts of reactants.

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The theoretical yield of NaBr given that 2.36 moles of FeBr₃ reacts is 7.08 moles

2FeBr₃ + 3Na₂S → Fе₂S₃ + 6NaBr

From the balanced equation above,

2 moles FeBr₃ reacted to produce 6 moles of NaBr

From the balanced equation above,

2 moles FeBr₃ reacted to produce 6 moles of NaBr

Therefore,

2.36 moles FeBr₃ will react to produce = (2.36 × 6) / 2 = 7.08 moles of NaBr

Therefore,

Thus, the theoretical yield of NaBr is 7.08 moles

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Answer:

7.08

Explanation:

Answer:

One

Explanation:

In a hydrogen atom, the first outer shell only consists of two valence electrons, because it would already have one, the atom only needs one more.

It requires two electrons to completely occupy its outer shell, it frequently forms a single covalent bond with another atom. Because of this configuration, hydrogen can gain access to two electrons and completely occupy its valence shell.

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Answer:

speed= distance/time

= 100/5=20mph

Answer:

La distancia recorrida por el móvil es 228.600 m

Explanation:

El movimiento rectilíneo uniforme MRU es el movimiento que describe un cuerpo o partícula a través de una línea recta a velocidad constante. Es decir:, en este caso el movimiento es lineal en una única dirección  y la velocidad de desplazamiento es constante.

La velocidad es una magnitud física que expresa la relación entre el espacio recorrido por un objeto y el tiempo empleado para ello mediante la expresión:

\(velocidad=\frac{distancia}{tiempo}\)

En este caso:

Reemplazando:

\(25 \frac{m}{s} =\frac{distancia}{9144 s}\)

y resolviendo obtienes:

distancia= 25\(\frac{m}{s}\) *9144 s

distancia= 228.600 m

La distancia recorrida por el móvil es 228.600 m

A movement is rectilinear uniform when an "object" (for example) travels in a straight path at a constant speed, given that its acceleration is zero.

Velocity (v) = 25m/s

Distance (d) = ?

Time (t) = 2.54hr = 9,144 s

Looking at the data, we see that the time is in hr, but we need it in seconds. Therefore we do a conversion from hours to minutes, taking into account that 1 hour is equal to 3600 seconds.

To calculate the distance traveled by the mobile, the speed is multiplied by the time taken.

For this the following formula is applied:

We apply the data in the formula; to solve for the distance.

Answer: The distance traveled by the mobile is 228,600 meters.

Formaldehyde is a colorless, combustible gas that has a strong, pungent smell when it is at room temperature. Formaldehyde has a - 19.1 °C boiling point. 37% unrestrained

A wide range of industries employ formaldehyde. It is used in labs, building materials, textiles, embalming, disinfectants, glues and resins, dyes, and other products.

The throat, nose, eyes, and skin can all become irritated by formaldehyde. Certain cancer types may be brought on by high exposure levels. Learn more about the harm exposure to formaldehyde can do to your health from the Agency for Toxic Substances and Disease Registry.

Formaldehyde has been linked to myeloid leukaemia and a number of uncommon malignancies, including those of the paranasal sinuses, nasal cavity, and nasopharynx, according to studies of individuals exposed to high doses of the chemical, such as industrial employees and embalmers.

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Answer: 35.84

Explanation: Look at the most uncertain number and your sum should have the same number of decimal places as that. In this case it is 4.26 which as 2 numbers following the decimal point, so your answer should too.

For the following alkyne structure, the hybridization of each carbon in the molecule is C1 = Sp3, C2=Sp3, C3=Sp, C4=Sp, C5= Sp3

Bond angle=

1)C1-C2-C3= 109 degree 28

2)C2-C3-C4=180 degree

3)C3-C4-C5= 180 degrees

Effective molecular charge order= S> Si> AI> Mg

What is hybridization?

In chemistry, orbital hybridization (or hybridization) is the concept of mixing atomic orbitals to form new hybrid orbitals (having different energies, shapes, etc. than the component atomic orbitals) suitable for electron pairing. Yes, they form chemical bonds through valence bond formation.

Hybridization is defined as the concept of mixing two atomic orbitals to create a new type of hybrid orbital. This mixing usually results in the formation of hybrid orbitals with very different energies, shapes, etc.

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The element that, when alloyed with copper, results in an alloy that is precipitation hardenable is F:  Beryllium.

Precipitation hardening is a heat treatment process used to increase the strength of certain alloys. When beryllium is alloyed with copper, it forms a copper-beryllium alloy. This alloy can undergo precipitation hardening, which involves a sequence of heating and cooling steps to precipitate a fine dispersion of particles within the material. These particles hinder dislocation movement, resulting in increased strength and hardness. The addition of beryllium enables the precipitation hardening process in copper-based alloys.

Option F Beryllium is the correct answer.

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Answer:>neutrons. But these basic atomic components are by no means the only known subatomic particles. Protons... A free neutron—one that is not incorporated into a nucleus—is subject to radioactive decay of a type called beta decay.

Explanation:

The energy of the photon released by the microwave is 19.86 x 10⁻²⁵ J.

The microwave releases photon of a particular energy.

The energy of the photon is given by,

E = hv

Where,

E is the energy of the photon,

h is the Planck's constant,

v is the frequency of the photon.

The value of the Planck's constant is 6.62 x 10⁻³⁴ m²kg/s

The value of the frequency of the photons released by the microwave is 3 x 10⁹ Hz.

Now, putting the values,

E =  6.62 x 10⁻³⁴ x 3 x 10⁹

E = 19.86 x 10⁻²⁵ J.

The energy of the photon is 19.86 x 10⁻²⁵ J.

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Answer:

carbon-12, potassium, and argon

Explanation:

The three elements that geologists measure to determine the age of an organism's remains are carbon-12, potassium, and argon.

So, the second option is correct one.

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Answer:

Substance at the beginning of a reaction- reactant

Substance at the end of a reaction- product

Number placed before a compound in a chemical equation- stoichiometric coefficient

Explanation:

In a reaction equation, the species written on the left hand side of the equation are called the reactants.

The reactants combine to form the species on the right hand side of the reaction equation called products.

The stoichiometric coefficient is a number written before the formula of a compound in the reaction equation.

Answer:A

Explanation: Since more energy levels are added, the pull decreases which means the electronegativity from electrons also decrease.

The electronegativity change as principal energy levels are added to an atom is electronegativity decreases. The correct option is A.

The ability of an atom to draw shared electrons in a covalent connection is referred to as electronegativity. The stronger an element attracts the shared electrons, the higher its degree of electronegativity.

As a result, the electronegativity of an element drops as you advance down a group on the periodic table because the larger number of energy levels distances the outside electrons from the nucleus' pull. On the periodic table, electronegativity rises from left to right across each period.

Thus, the correct option is A. Electronegativity decreases regarding the electronegativity decreases with energy levels added.

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Answer:

Difference between a heterogeneous mixture and a solution ( homogenous mixture) is that a homogenous mixture has uniform composition throughout the mixture, whereas heterogeneous mixture has varying composition throughout the mixture.