Find the volume of 20g of benzene

It would be C. Have a great day!

Answer:

D. Collision with a high-speed particle.

Explanation:

During a process called nuclear fission, some nuclei can be hit by fast-moving atomic particles and thus can be broken down into smaller nuclei. Energy is given off in this process, which is the basis for nuclear power plants.

To produce 513.0 mL of hydrogen gas at STP, approximately 0.413 g of aluminum is required.

To determine the required to produce 513.0 mL of hydrogen gas at STP, we need to use stoichiometry. From the balanced chemical equation, we can see that 2 moles of aluminum react to produce 3 moles of hydrogen gas. Using the molar volume mass of aluminum of a gas at STP (22.4 L/mol), we can calculate the number of moles of hydrogen gas produced. Then, using the molar mass of aluminum (26.98 g/mol), we can find the mass of aluminum needed.

First, convert the volume of hydrogen gas to moles using the molar volume:

(513.0 mL / 1000 mL/L) × (1 L / 22.4 L/mol) = 0.0229 mol H₂

Since the molar ratio of aluminum to hydrogen gas is 2:3, divide the number of moles of hydrogen gas by 3 and multiply by 2 to find the moles of aluminum:

0.0229 mol H₂ × (2 mol Al / 3 mol H₂) = 0.0153 mol Al

Finally, multiply the moles of aluminum by the molar mass of aluminum to find the mass:

0.0153 mol Al × 26.98 g/mol = 0.413 g Al

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To find the mass of Al required to produce 513.0 mL of H2 gas, convert the given volume of gas to moles (at STP, 1 mole = 22.4 L), use the stoichiometry of the reaction to find the corresponding moles of Al, and then multiply by Al's molar mass.

The question is asking for the mass of Aluminum (Al) that is required to produce a specific volume of Hydrogen gas (H2) based on the reaction provided. According to the stoichiometry of the reaction, 2 moles of Al are required to produce 3 moles of H2 gas. At Standard Temperature and Pressure (STP), 1 mole of any gas occupies 22.4 liters. Thus, to find the volume of hydrogen, we convert the given volume from milliliters to liters (513.0 mL is 0.513 Liters) and divide it by 22.4 L/mol to find the moles of hydrogen.

From this stoichiometry, we then find the corresponding moles of Al (2/3 of the moles of H2) and multiply this by the molar mass of Al (approximately 26.98 g/mol) to find the mass of Aluminum needed.

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Cell division allows organisms to grow and repair damaged tissues. But it does not assist in energy production, which is performed by mitochondria through cellular respiration.

The statement is partially true and partially false. Cell division, indeed, allows organisms to grow and repair damaged structures. This occurs as the original one cell replicates itself multiple times to form the complex multicellular organism. Even after the organism is fully grown, new cells are continuously produced for maintenance and repair purposes, for instance, blood and skin cells. However, the part of the statement that says cell division helps organisms produce energy is false. Energy production in cells is actually a function of the mitochondria in a process known as cellular respiration, not cell division.

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The wavelength of an electromagnetic wave that travels at 3 x 108 m/s and has a frequency of 60 MHz is 5m

The formula for calculating the wavelength of the electromagnetic wave is expressed as:

λ =v/f where

Given the following parameters

f = 60MHz = 60,000,000Hz

v = 3 x 10⁸ m/s

Substitute the given parameters into the formula as shown:

[tex]\lambda =\frac{3 \times 10^8}{6 \times 10^7} \\\lambda = \frac{3}{6} \times 10^{8-7}\\\lambda = \frac{1}{2} \times 10\\\lambda = 5m[/tex]

Hence the wavelength of an electromagnetic wave that travels at 3 x 108 m/s and has a frequency of 60 MHz is 5m.

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The wavelength of an electromagnetic wave that travels at 3 x 10⁸ m/s with a frequency of 60 MHz is 5 meters.

To calculate the wavelength of an electromagnetic wave, you can use the wave equation, which relates the speed of light (c), wavelength (λ), and frequency (f) of the wave:

c = λ × f

Where:

Given the frequency of 60 MHz (60 × 10⁶ Hz), we can rearrange the equation to solve for λ:

λ = c / f

λ = (3 × 10⁸ m/s) / (60 × 10⁶ Hz)

After calculating, you find that λ = 5 meters.

organelles perform specific functions in cells

Answer:

Another name of activation energy is "Needed energy" .

Explanation:

Activation energy can be imagined of as the measurement of the potential barrier (seldom described the energy barrier) distributing minima of the potential energy surface concerning the initial and ultimate thermodynamic phase. For a chemical reaction or distribution to advance at a reasonable rate, the specific temperature of the operation should be high satisfactory so that there subsists an apparent number of particles with translational energy equivalent to or higher than the activation energy. The word Activation Energy was founded in 1889 by the Swedish expert Svante Arrhenius.

Final answer:

The group CF3 is more electronegative than CH3 due to the presence of fluorine atoms, which have a significantly higher electronegativity (4.0) compared to the electronegativity of hydrogen atoms (2.1) in CH3.

Explanation:

To determine which of the two groups - CF3 or CH3 - is more electronegative, we should consider the electronegativity of the atoms involved. In CF3, the fluorine atoms have an electronegativity of 4.0, which makes them significantly more electronegative than carbon, which has an electronegativity of 2.5. In contrast, in CH3, the hydrogen atoms have an electronegativity of 2.1, which is closer to that of carbon, resulting in less polarization than in CF3.

Based on the individual electronegativities of fluorine and hydrogen, and knowing that fluorine is much more electronegative than carbon, the CF3 group is more electronegative than the CH3 group. This is because the presence of fluorine atoms, which can better stabilize a negative charge, leads to a greater tendency for polarization and creating a strong dipole moment in compounds they are part of.

Till now we are able to find

a)  How does the moon affect tides on earth? : the answer is moon gravitational field

b) How long does it take for the earth to rotate on its axis? : we know the answer is 24 hours (a day)

c) Why do volcanoes erupt? : due to divergence / convergence of tectonic plates

However we still cannot predict "When will the next earthquake happen?" based on science

Science cannot answer the presence of God.

23 hours and 56 minutes.

Volcanoes erupt because of density and pressure. The lower density of the magma relative to the surrounding rocks causes it to rise (like air bubbles in syrup).

It will rise to the surface or to a depth that is determined by the density of the lawa and the weight of the rocks above it.

Global warming, Cosmic Background radiation (even though most is blocked not ALL), and pollution.

A. is the answer, because the more an experiment is repeated, it will become apparent if it yields the same results thus confirming or debunking the hypothesis.

The theoretical yield of N₂O₅ is 91.8 g.

We have the masses of two reactants, so this is a limiting reactant problem.  

We know that we will need a balanced equation with masses, moles, and molar masses of the compounds involved.  

Step 1. Gather all the information in one place with molar masses above the formulas and masses below them.  

M_r:      28.01   32.00    108.01

              2N₂  +  5O₂ ⟶ 2N₂O₅

Mass/g: 28.0      68.0  

Step 2. Calculate the moles of each reactant  

Moles of N₂ = 28.0 g N₂ × (1 mol N₂/28.01 g N₂) = 0.9996 mol N₂

Moles of O₂ = 68.0g O₂ × (1 mol O₂/32.00 g O₂) = 2.125 mol O₂

Step 3. Identify the limiting reactant

Calculate the moles of N₂O₅ we can obtain from each reactant.  

From N₂: Moles of N₂O₅ = 0.9996mol N₂ × (2 mol N₂O₅/2 mol N₂) = 0.9996 mol N₂O₅  

From O₂: Moles of N₂O₅ = 2.125 mol O₂ × (2 mol N₂O₅/5 mol O₂) = 0.8500 mol N₂O₅

The limiting reactant is the one that gives the smaller amount of N₂O₅.

Step 4. Calculate the theoretical yield of N₂O₅.

Mass of N₂O₅ = 0.8500 mol N₂O₅ × (108.01 g N₂O₅/1 mol N₂O₅) = 91.8 g N₂O₅

The theoretical yield is 90.7 g.

We know that;

Number of moles of N2= 28.0 g/28 g/mol = 1 moles

Number of moles of oxygen =  68.0 g/32 g/mol = 2.1 moles

From the reaction equation;

2 N2 + 5 O2 → 2 N2O5

2 moles of N2 reacts with 5 moles of O2

1 mole of N2 reacts with 5 × 1/2 = 2.5 moles of O2

This implies that O2 is the limiting reactant.

5 moles of O2 yields 2 moles of N2O5

2.1 moles of O2 yields 2.1 ×  2/5 = 0.84 moles

Theoretical yield of N2O5 = 0.84 moles ×  108 g/mol = 90.7 g

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Answer:

The answer is Relative plenitude alludes to the amount of a specific isotope is available in a given measure of test.  

Explanation:

The 'relative plenitude' of an isotope implies the level of that specific isotope that happens in nature. Most components are comprised of a blend of isotopes. The total of the rates of the particular isotopes must indicate 100%. The relative nuclear mass is the weighted normal of the isotopic masses. The percent plenitude of every sort of sweets reveals to you what number of every sort of Aufbau there are in each 100 CANDIES. Percent wealth is additionally relative plenitude. This is only a method for giving us a photo on which kind exists all the more every now and again.

Relative abundance refers to the ratio or proportion of a particular isotope out of all isotopes of the same element present in a sample. This concept is used when determining the average atomic mass of an element.

Relative abundance in the context of isotopes refers to the proportion of a particular isotope compared to all of the isotopes present in a sample. While percent abundance states how many of each kind of isotope exist in every 100 particles, relative abundance specifies the ratio or portion of one isotope to the total isotopes of the same element. This is applied when we determine the average atomic mass of an element as depicted in the Periodic Table, where the relative abundance plays an important role.

Isotopes of an element are atoms with the same atomic number but different mass numbers, therefore, they only differ in the number of neutrons within the nucleus. When a naturally occurring element is composed of several isotopes, the atomic mass of the element represents the average of the masses of the isotopes involved, weighted by their relative abundance. For instance, Carbon-12 (with 6 protons and 6 neutrons) and Carbon-13 (with 6 protons and 7 neutrons) are isotopes of Carbon. If in a sample, Carbon-12 represents 99% and Carbon-13 represents 1%, the relative abundance will influence the average atomic mass towards the mass of Carbon-12.

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Saponification is a process that involves conversion of fat or oil into soap and alcohol by the action of heat in the presence of aqueous alkali

The Heaviest element is helium

Answer:

The correct electron configuration for an electrically neutral atom of argon (Ar) is:

Explanation:

(c) 1s² 2s² 2p⁶ 3s² 3p⁶.

The electron configuration of an electrically neutral atom of argon (Ar) is 1s² 2s² 2p⁶ 3s² 3p⁶.

The electron configuration of an electrically neutral atom of argon (Ar) is 1s² 2s² 2p⁶ 3s² 3p⁶. This configuration represents the arrangement of electrons in different energy levels and orbitals of an atom. The numbers and letters in the configuration represent the energy level (n) and the type of orbital (s, p). In this case, argon has two electrons in the 1s orbital, two electrons in the 2s orbital, six electrons in the 2p orbital, two electrons in the 3s orbital, and six electrons in the 3p orbital.

Color of mineral is the least reliable method for identifying a mineral.

It's color, my son got this one right.

Answer;

-Biochemist

Explanation;

Biochemistry is the study of the chemical reactions that take place within living cells. These includes photosynthesis in plants, thus a biochemist studies chemical reactions involving photosynthesis.

Photosynthesis is the process by which green plants and certain other organisms transform light energy into chemical energy. During photosynthesis in green plants, light energy is captured and used to convert water, carbon dioxide, and minerals into oxygen and energy-rich organic compounds.

An imaginary line joining a planet and the sun sweeps out an equal area of space in equal amounts of time. Thus, the speed of the planet increases as it nears the sun and decreases as it recedes from the sun.

Answer: It states that a line joining a planet and the sun sweeps an equal area in equal time, moving along its orbit.

Explanation: It tells us about the speed of a planet revolving around the sun in an elliptical orbit. The speed of the planet varies inversely to the distance, when the planet is closer speed is high and speed is low when it recedes from the sun. The rate at which area is being swept out is constant ,that is 'equal area in equal time'.  

Answer:

The correct answer is option D, that is, water in the Pacific Ocean has more thermal energy and a lower temperature.

Explanation:

The water present in the Pacific Ocean exhibits lower temperature and more thermal energy. This is due to the fact that the Pacific Ocean comprises more molecules, which signifies that it possesses more kinetic energy that produces more thermal energy. As a cup of coffee possesses fewer molecules, thus, the molecules will travel faster and its temperature will be more.

115 + 152 = 267

there are 267 pages total.

I would say B. the stars

This is because you don't see stars move. For example, when you look at the moon, do you see the stars move while the moon sits in place? No right. So, your answer would be B. Hope this helps!

Question

Planets appear to move in the sky against the backdrop of the ____ . other planets B. the stars C. the sun D. the moon

Answer:

The stars

Hope this helps!

Answer is: aluminum is malleable and conducts electricity.

Mallebility is the property or ability of the metal to be hammered or pressed into shape without breaking or cracking.

Aluminium (Al) is metal, sulfur (s) and chlorine (Cl) are nonmetals.

Metals conduct electricity because of the metallic bond, sulfur and chlorine can not conduct electricity because they are nonpolar compounds.

Metallic bond is formed between electrons and positively charged metal ions

Answer:

aluminum is malleable and conducts electricity.

Explanation:

No, your equation is not balanced.

[tex]_{82}^{214}Pb\: \longrightarrow \:_{-1}^{0}He \:+ \: _{81}^{214}Tl\\[/tex]

The main point to remember in balancing nuclear equations is that the sums of the superscripts and the subscripts must be the same on each side of the equation.  

Sum of superscripts: 214 = 0 + 214.  

Sum of subscripts: 82 ≠ -1 + 81.

Your subscripts are not balanced.

If the equation represents the β decay of lead-214, you must write it as

[tex]_{82}^{214}Pb\: \longrightarrow \:_{-1}^{0}e \:+ \: _{83}^{214}Bi\\[/tex]

Answer:

stratosphere Here you go

Explanation:

The atomic mass is defined as the mass an atom of an element. The atomic mass in approximation is equal to the sum of number of neutrons and protons in the nucleus of an atom (mass number). The units which are used for measuring the atomic mass is atomic mass unit, [tex]u[/tex].

Thus, the correct option is option E that is atomic mass unit is used for measuring atomic mass.

Answer:

Explanation:

unit isnt e its d