In 1909, Ernest Rutherford performed an experiment to explore the atomic structure. In his experiment, he projected high-speed α‎ particles onto a thin gold foil. He found that all α‎ particles did not follow the same path. Most of the particles passed through the foil without any scattering, implying that most of the space in an atom is empty. Some particles were scattered at a large angle, and very few of them scattered back in the direction from which they had come. Based on these observations, Rutherford proposed an atomic model, which is known as Rutherford’s atomic model.
O True
O False

Approximately 766.08 grams of oxygen are required to completely react with 240g of C₂H₆.

To determine the amount of oxygen required to completely react with 240g of C₂H₆ (ethane), we need to set up a balanced chemical equation for the combustion of ethane.

The balanced equation for the combustion of ethane is as follows:

C₂H₆ + O₂ → CO₂ + H₂O

From the balanced equation, we can see that the stoichiometric ratio between C₂H₆ and O₂ is 1:3. This means that for every one mole of C₂H₆, three moles of O₂ are required for complete combustion.

To calculate the amount of oxygen required, we need to convert the given mass of C₂H₆ to moles using its molar mass, and then use the stoichiometric ratio to determine the moles of O₂ required. Finally, we can convert the moles of O₂ back to grams using the molar mass of oxygen.

The molar mass of C₂H₆ is calculated as follows:

(2 x atomic mass of carbon) + (6 x atomic mass of hydrogen)

(2 x 12.01 g/mol) + (6 x 1.01 g/mol) = 30.07 g/mol

Now, we can proceed with the calculation:

Calculate the moles of C₂H₆:

moles of C₂H₆ = mass of C₂H₆ / molar mass of C₂H₆

moles of C₂H₆ = 240 g / 30.07 g/mol ≈ 7.98 mol

Determine the moles of O₂ using the stoichiometric ratio:

moles of O₂ = moles of C₂H₆ x (3 moles of O₂ / 1 mole of C₂H₆)

moles of O₂ = 7.98 mol x 3 ≈ 23.94 mol

Convert moles of O₂ to grams:

mass of O₂ = moles of O₂ x molar mass of O₂

mass of O₂ = 23.94 mol x 32.00 g/mol = 766.08 g

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The statements which is true is the atomic mass will be between 35 and 37.

Isotopes can be defined as the tittles of identical rudiments that are composed of the same number of electrons and protons but differ in case of the number of neutrons. Since the number of neutrons is different in colorful isotopes of an element so, their infinitesimal millions also vary. still, the infinitesimal number remains the same as no change occurs in protons number.

Chlorine is an element in the periodic table with infinitesimal number 17 and is represented with the symbol Cl. The element nickel has colorful isotopes. One of the isotopes of chlorine is chlorine- 35 and another bone is chlorine-37 which is present in a rate of 75.8% and24.3%.

The average atomic mass of chlorine;

Average atomic mass

=(Fractional abundance of 35Cl) × (Molar Mass of 35Cl) +(Fractional abundance of 37Cl) × (Molar Mass of 37Cl)

=75.8100 × 35u + 24.3100 × 37u

=26.53u + 8.991u

=35.521 u

The average atomic mass of chlorine is 35.521 u.

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Answer:

So, a full moon rises early in the night and sets early in the morning, it is visible all night long. Contrarily, a new moon rises early in the morning (with the sun) and sets at night (with the sun), and is not visible at night, at all.

Hope that helps!

Answer:

because

Explanation:

A new moon is visible only during a solar eclipse.They are rarely seen.

The Full Moon is visible in the sky approximately from sunset to sunrise.

In order to appear full to us on Earth, we have to see the entire day side of the moon.

That happens only when the moon is opposite the sun in our sky. So a full moon looks full because it's opposite the sun

Answer:

\(\Large \boxed{\mathrm{C_3 H_8 \ (g)+5O_2 \ (g) \Rightarrow 3CO_2 \ (g)+4 H_2 O \ (l)}}\)

\(\rule[225]{225}{2}\)

Explanation:

\(\sf C_3 H_8 +O_2 \Rightarrow CO_2 + H_2 O\)

Balancing Carbon atoms on the right side,

\(\sf C_3 H_8 +O_2 \Rightarrow 3CO_2 + H_2 O\)

Balancing Hydrogen atoms on the right side,

\(\sf C_3 H_8 +O_2 \Rightarrow 3CO_2 +4 H_2 O\)

Balancing Oxygen atoms on the left side,

\(\sf C_3 H_8 +5O_2 \Rightarrow 3CO_2 +4 H_2 O\)

\(\rule[225]{225}{2}\)

The combustion reaction of propane is :C₃H₈ \(_(g)\)+5 O₂ \(_(g)\)\(\rightarrow\)3 CO₂\(_(g)\) + 4 H₂O\(_(l)\).

Combustion is defined as a high temperature exothermic reaction  between a fuel which acts as a reductant  and an oxidant which is usually atmospheric oxygen.It does not result in fire as the flame is visible only when substance which undergoes combustion vaporizes.

Activation energy must be overcome so that combustion is initiated.Solid fuels such as wood and coal initially undergo endothermal pyrolysis  which results in gaseous fuels. It is widely used in industry  and the application is based on concepts of chemistry, physics and mechanics.

It is a complex chemical process involving many steps which depend on properties of combustible material. It is a type of redox reaction.

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Answer:

B: They are in the same group because they have similar chemical properties, but they are in different periods because they have very different atomic numbers.

Explanation:

I took the Unit test on EDG and I got it correct

Pls mark me brainliest

Answer:

81.59%

Explanation:

First we convert 107.50 g of NH₃ into moles, using its molar mass:

Now we calculate how many moles of NO would have been formed by the complete reaction of 6.32 moles of NH₃:

Then we convert 6.32 moles of NO to grams, using its molar mass:

Finally we calculate the percent yield:

Answer:

Explanation:

The equilibrium constant expression for the given reaction is:

K = ([C6H5COO-][C6H5NH3+])/([C6H5COOH][C6H5NH2])

We can use the acid dissociation constant (Ka) for benzoic acid and the base dissociation constant (Kb) for aniline to solve for the equilibrium constant (K) of the reaction.

Ka = [C6H5COO-][H3O+]/[C6H5COOH]

[H3O+] = Ka*[C6H5COOH]/[C6H5COO-]

Kb = [C6H5NH3+][OH-]/[C6H5NH2]

[OH-] = Kb*[C6H5NH2]/[C6H5NH3+]

Substituting [H3O+] and [OH-] into the equilibrium constant expression and simplifying, we get:

K = (Ka*Kb)/([H3O+][OH-])

K = (6.3×10^(-5))(4.3×10^(-10))/((KaC6H5NH2)(KbC6H5COOH))

K = (6.3×10^(-5))*(4.3×10^(-10))/(1.00×10^(-14))

K = 2.73×10^(-2)

Therefore, the equilibrium constant for the given reaction is 2.73×10^(-2).

Explanation:

Force=mass *acceleration

F=300*5

f

F=1500N

The answer is 5.25 x 10²³ atoms

Sorry for not showing the work.

You can do the steps and check your answer. I hope this was helpful

Answer:

Thx

Explanation:

Answer:

1.5 × 10² mL

Explanation:

Step 1: Given data

Step 2: Calculate the final volume of the gas

For an ideal gas, we can calculate the final volume of the gas using Boyle's law.

P₁ × V₁ = P₂ × V₂

V₂ = P₁ × V₁/P₂

V₂ = 1.9 atm × 80 mL/1.0 atm

V₂ = 1.5 × 10² mL

Since the pressure decreased, the volume of the gas increased.

We can see here that the catalytic cycle for the hydrogenation of alkenes using Wilkinson's catalyst involves several steps.

Here's an overview of the catalytic cycle, including the necessary details:

i. Chemical structure of the catalyst:

Wilkinson's catalyst, also known as chloridotris(triphenylphosphine)rhodium(I), has the following chemical structure: [RhCl(PPh3)3]

ii. Molecular geometry of the catalyst:

The Wilkinson's catalyst has a trigonal bipyramidal geometry around the rhodium center. The three triphenylphosphine (PPh3) ligands occupy equatorial positions, while the chloride (Cl) ligand occupies an axial position.

iii. Type of reactions involved:

The catalytic cycle involves several reactions, including:

iv. Starting material, reagent, and solvent:

The starting material is an alkene, and the reagent is Wilkinson's catalyst ([RhCl(PPh3)3]). The reaction is typically carried out in a suitable solvent, such as dichloromethane (CH2Cl2) or tetrahydrofuran (THF).

v. Major and minor end-products:

The major end-product of the hydrogenation reaction is the fully saturated alkane, resulting from the addition of hydrogen across the double bond. The minor end-product may include cis- or trans-configured alkanes if the original alkene substrate possesses geometric isomers.

vi. Intermediates:

The intermediates in the catalytic cycle include:

These intermediates play a crucial role in facilitating the hydrogenation reaction and enabling the catalytic cycle to proceed.

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Answer:

Chemical reactions, kinetics, organic chemistry

Explanation:

You might study the chemical reaction, learn about the differences between products and reactants, about delta H and exothermic and endothermic reactions. You may also study Kinetics by studying the rates of reactions with certain chemicals in a maple's enzymatic processes.

Another thing that you might learn about is organic chemistry. The glucose molecules, carbohydrates, lipids, nucleic acids, all have a structure based on the Carbon atom. You can learn about the specific structures of some chemicals that are involved in photosynthesis and simple hydrocarbons that are involved in photosynthetic/bio-synthetic pathways.

There's probably a lot more - but these are the most basic things I could think of.

Answer:

Option C Removing Na₂CO₃

Option E Heating the container.

Explanation:

The equation for the reaction is given below:

2NaHCO₃ (s) <=> Na₂CO₃ (s) + CO₂ (g) + H₂O (g)

Enthalpy change (ΔH) = 136 KJ

To obtain more CO₂ do the following:

1. Add more NaHCO₃

From chemical equilibrium, adding more NaHCO₃ means the reactant has increase. Thus, it (the reactant) will react to form more product (CO₂)

2. Removing any of the products. Removing any of the products implies that more reactants are in the reaction vessel than the product. Thus, the reactants will react to produce more products (CO₂)

3. Heating the container. Heating the container will lead to an increase in the temperature of the reaction. Since the enthalpy change (ΔH) is positive it means the reaction is endothermic. Thus, heating the container i.e increasing the temperature will favours the forward reaction i.e more products will be obtained.

NOTE: Pressure has no effect in the reaction system since there is no gaseous reactants.

Considering the options given above, C and E gives the correct answer to the question.

Answer:

"0.053457 M" of sulfuric acid.

Explanation:

The given values are:

\(V\) = 10 mL solution

\(V_{added}\) = 12.20 mL

\(V_{total}\) = 22.20 mL

then,

M 0.103 M of NaOH,

\(V_{rinsed}\) = experiment  will not be affected

\(V_{total \ base}\) = 10.38 mL

Now,

⇒  mol of NAOH = MV

                            = \(0.103\times 10.38\)

                            =  \(1.06914 \ m\)

Whether Sulfuric acid, then

⇒  \(H_{2}SO_{4} + 2NaOH = Na_{2}SO_{4} + 2H_{2}O\)

⇒  \(mol \ of \ acid =\frac{1}{2}\times \ mol \ of \ base\)

⇒  \(1.06914 \ m \ mol \ of \ base = \frac{1}{2}\times 1.06914 = 0.53457 \ m \ mol \ of \ acid\)

Before any dilution:

\(V_{sample} = 10 \ mL\)

⇒  \(M \ acid = \frac{m \ mol}{V}\)

                 \(=\frac{ 0.53457 }{10}\)

                 \(=0.053457 \ M\) (Sulfuric acid)

Large-scale convection currents create divergent plate boundaries in science.

This refers to vertical motion organized on a larger scale than atmospheric free convection, it is associated with cumulus clouds. Examples of large-scale convection currents patterns of vertical motion is hurricanes or migratory cyclones.

Large convection currents in the aesthenosphere send heat to the surface, where plumes of less dense magma break apart the plates at the spreading centers, giving rise to divergent plate boundaries.

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Best example of a new substance being formed is the reaction between hydrogen gas and oxygen gas to form water.

In this reaction, two hydrogen molecules (H₂) react with one oxygen molecule (O₂) to form two water molecules (H₂O). The resulting substance, water, has entirely different properties from its constituent elements. For example, water is a liquid at room temperature, while both hydrogen and oxygen are gases.

Water also has different chemical and physical properties, such as boiling point, melting point, density, and solubility. These changes in properties indicate that a new substance with a different chemical composition has been formed. The process of hydrogen and oxygen reacting to form water is an example of a chemical reaction, which involves the breaking and forming of chemical bonds between atoms to create new substances.

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Answer:

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Explanation:

tanga bobo potang Ina mo

Perhaps you like the appearance of rocks and boulders but prefer a material that stays cool in the desert heat. In this case, concrete or travertine should be your top picks. These materials have a high thermal mass and absorb the coolness of the earth below rather than the hot sun overhead

Sometimes you like how rocks and boulders look, but you'd rather have something that keeps cool in the hot desert. In this circumstance, limestone or concrete ought to be your top choices.

Deserts are incredibly arid places where well-adapted flora and animals can be found. Deserts may be divided into four basic categories are hot and dry, semi-arid, coastal, and cold.

The majority of specialists concur that a desert is any region of land with annual precipitation totals of less than 25 cm (10 inches). In a desert, evaporation frequently much outweighs yearly precipitation. Water is scarce for plants and other living things in all deserts.

Thus, Due to their large thermal mass, these materials absorb the cooling of the earth below rather than the heat from the sun above. Something that keeps cool in the hot desert.

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Answer:

deuterium is heavier isotope of hydrogen need

high weight of atom will lead to higher boiling point

Two types of data that can be obtained from descriptive statistics include frequency distribution and variability in the data set. These data are calculated as the mean of standard deviation in the case of variation.

The relative importance of the science field of descriptive statistics is based on the obtention of statistically significant measurements in order to validate a hypothesis.

Therefore, with this data, we can see that the relative importance of the science field of descriptive statistics is based on testing working hypotheses.

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Answer:

A - right shift

B - no shift

C - right shift

Explanation:

According to Le Chatelier's principle, when a reaction is in equilibrium and one of the factors affecting the rate of reaction is introduced, the equilibrium will shift so as to annul the effects of the constraint.

In this case, decreasing the volume of the reaction's container is equivalent to increasing the pressure of the reaction. When pressure is increased, the reaction will shift towards the side with a lower number of moles.

In A, the total number of moles on the left-hand side of the reaction is two while it is one on the right-hand side. An increase in pressure will, therefore, see the equilibrium shifting to the right-hand side.

In B, the total number of moles on both the right and the left-hand side is two each. An increase in the pressure will have no effect on the equilibrium.

In C, the total number of moles on the left-hand side is two while it is one on the right-hand side. Hence, an increase in the pressure of the reaction will cause a shift in the equilibrium to the right.

Answer:

okkkkkkkkkkkkkkkkkkkkkkkkkkk

26.8L is the volume, in liters, of 1.20 mol of C\(_3\)H\(_8\) gas at STP. A measurement of three-dimensional space is volume.

A measurement of three-dimensional space is volume. It is frequently expressed quantitatively using SI-derived units, like the cubic metre or litre, or different imperial or US-standard units, including the gallon, quart and cubic inch. Volume and length (cubed) have a symbiotic relationship.

The volume of an envelope is typically thought of as its capacity, not as the amount of space it takes up. In other words, the volume is the quantity of fluid (liquid or gas) that the container may hold.

Volume = 1.20×22.4

              =26.8L

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The electron configuration for the ion formed by the element magnesium, Mg is 1s²2s²2p⁶ by assuming that the octet rule is obeyed. Therefore, option A is correct.

The octet rule refers to atoms' preference for having eight electrons in their valence shell. Atoms with fewer than eight electrons are more likely to react and form more stable compounds.

The Mg atom will achieve an octet by losing its two outermost electrons and thus gaining 2+ charges, according to the octet rule. Because Mg belongs to the alkali metal group, it will lose electrons rather than gain them.

We know that when an atom completes its octet., electrons in its valence shell, it becomes stable. Now, electrons must be given out in magnesium ion valence to complete its octet.

Thus, The electron configuration for the ion formed by the element magnesium, Mg is 1s²2s²2p⁶. Option A is correct.

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Your question is incomplete, most probably your question was

assuming that the octet rule is obeyed, write out the electron configuration for the ion formed by the element magnesium, Mg

A. 1s²2s²2p⁶

B.  1s²2s²2p²

C.  1s²2s²2p₅

D.  1s²2s²2p¹

5.50M NaOH must be added to 680.0 mL of a buffer, The amount of NaOH  is mathematically given as

V=2.107mL

Generally, the equation for Chemical Reaction is mathematically given as

CH3COOH+OH^{-} ⇄ CHCOO^{-} + H2O

Therefore

pka=-log(1.8*10{-5})

pKa=5-0.25527

pKa=4.3447

Hence

\(pH=pKa+log\frac{CH3COO}{CH3COOH}\\\\0.75=4.7447+log\frac{0.01564+x}{0.01428-x}\)

x=0.0115898

Volume of NaOH

V=0.0021072L

V=2.107mL

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A recreational slide that has water running down it to lessen friction, sometimes requiring the user to sit on a mat or raft, and occasionally ending in a pool.

In Faribault, Minnesota, lived Herbert Sellner. His career as a designer began with the creation of furniture, followed by the design of children's toys and, most notably, the Water-Toboggan Slide. The slide, constructed in 1923, was a wooden sled that guests could sit on and ride down an incline into a lake.

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Answer:

C. Response to environment