4.
Find the area of a rectangle whose length and width are
9.025 x 106 m and 5.215 x 10 m respectively.
-8

The molecular geometry (form) of CCl4 SF6 is identical to the configuration of the electron domains in a VSEPR.

VSEPR distinguishes between molecular geometry, which defines how the atoms in a molecule are ordered, and electron group geometry, which expresses how electron groups (bonds and nonbonding electron pairs) are arranged.

Chemistry frequently employs the valence-shell electron-pair repulsion (VSEPR) model to foretell the three-dimensional organization, or geometry, of molecules. This model accounts for the repulsion between electron pair to estimate the structure of a molecule.

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Explanation :

(a)

To find the average velocity for the time interval from 2.00s to 3.00s,

We need to find the displacement of the particle during this time interval. We can do this by finding the value of x at t = 3.00 and subtracting the value of x at t = 2.00.

The displacement is given by

Δx = x(3.00) - x(2.00)Δx = (10 x 3.00²) - (10 x 2.00²)Δx = 90m - 40mΔx = 50m

The average velocity is given by the displacement divided by the time interval:

average velocity = Δx / Δtaverage velocity = 50m / 1saverage velocity = 50m/s

(b)

To find the average velocity for the time interval from 2.00s to 2.10s,

We need to find the displacement of the particle during this time interval.

We can do this by finding the value of x at t = 2.10s and subtracting the value of x at t = 2.00s.

The displacement is given by x = x(2.10) - x(2.00). Δx = (10 x 2.10²) - (10 x 2.00²)Δx = 44.1m - 40mΔx = 4.1m

The average velocity is given by the displacement divided by the time interval:

average velocity = Δx / Δtaverage velocity = 4.1m / 0.1saverage velocity = 41m/s

Thus, the average velocity for the time interval from 2.00 to 3.00 is 50 m/s, and the average velocity for the time interval from 2.00 to 2.10 is 41 m/s.

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Answer:

24 molecules of CO2

Explanation:

Each molecule of CO2 has only one carbon atom, therefore we need 24 CO2 molecules to get the 24 carbon atoms, as requested.

Answer: It tells you how much of the molecule the element is

Explanation:

i did the test

By investigating the origins of various diseases, scientists play a key role in hospitals. They aid in understanding the underlying processes, risk factors, and potential therapies for many illnesses through their scientific knowledge and research techniques.

To understand the intricacies of diseases , their study involves running tests, analysing data, and working with other medical specialists. By figuring out the underlying reasons, scientists make it possible to create efficient diagnostic equipment, therapeutic methods, and preventative techniques .

Their discoveries and techniques expand medical knowledge, improve patient care, and ultimately work towards communities and people experiencing greater health. There are very factors that contribute to the overall institution.

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The structuralism perspective provides the most compelling reasons for entrenched poverty and lack of development in the global economy. According to structuralism, these issues are deeply rooted in the structural inequalities and power imbalances inherent in the global economic system.

Structuralists argue that the global economy is characterized by unequal distribution of resources, unequal access to markets, and asymmetrical power relations between developed and developing countries. These structural barriers perpetuate poverty and hinder development by limiting the ability of less developed countries to participate fully and benefit from the global economic system.

To address these issues, structuralists advocate for structural changes in the global economic system, including:

Addressing Trade Inequalities:

Redistributive Policies:

Developmental State Approach:

Debt Relief and Financial Assistance:

Global Governance Reforms:

By addressing the structural inequalities and power imbalances within the global economy, structuralism offers a comprehensive approach to tackling entrenched poverty and promoting sustainable development on a global scale.

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The weakness of the rutherford model of the atom that bohr addressed is that

The Rutherford model of the atom proposed by Ernest Rutherford in 1911 shows that the atom is much hollow space with its mass concentrated at the center being surrounded by electrons. It is the planetary model.

The Bohr model of the atom proposed by Neils Bohr in 1913 suggests that

The weakness of the rutherford model of the atom that bohr addressed is that

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Answer:

A) The graph shows how the rate of photosynthesis depends on the light intensity

B) Other factors may include co2 concentration, temperature, pollutants, water, and o2

Answer:

proton,neutron and electron

An atom of strontium-90 has 38 protons because the number of protons in an element is determined by its atomic number, which is always a whole number. The atomic number of strontium is 38, which means that a neutral strontium atom has 38 protons in its nucleus.

The "90" in strontium-90 refers to its atomic mass, which is the sum of its protons and neutrons. Since strontium-90 has a mass number of 90, and strontium has an atomic number of 38, we can calculate the number of neutrons by subtracting 38 from 90, which gives us 52 neutrons. Therefore, the nucleus of strontium-90 contains 38 protons and 52 neutrons.

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Answer:

A. The higher the frequency, the shorter the wavelength

Explanation:

The wavelength calculation formula is given as:

Wavelength, λ = Speed of light (v) ÷ frequency (f)

i.e: λ = \(\frac{v}{f}\) so that wavelength is inversely proportional to the frequency of the wave.

This means shorter wavelength has greater frequency, and vice versa.

I hope this was helpful

Because of the attraction forces known as hydrogen bonding, water is referred to as a polar solvent. An attraction between molecules known as a hydrogen bond occurs when partially positive hydrogen atoms are drawn to partially negative F, O, or N atoms.

A hydrogen bond (or H-bond) is a strong electrostatic attraction between an electronegative atom holding a lone pair of electrons, known as the hydrogen bond acceptor, and a hydrogen (H) atom that is covalently attached to a more electronegative "donor" atom or group.

When a hydrogen atom bonds with an electronegative atom, powerful intermolecular forces called hydrogen bonds are produced. The hydrogen bond acceptor's electronegativity will rise, resulting in a stronger hydrogen bond.

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The selectivity coefficient (also known as the separation factor) is a parameter that characterizes the relative response of an ion-selective electrode (ISE) to different ionic species with the same charge.

The selectivity coefficient (also known as the separation factor) is a parameter that characterizes the relative response of an ion-selective electrode (ISE) to different ionic species with the same charge. It is defined as the ratio of the activities (or concentrations) of the target ion and a reference ion at the same activity (or concentration), both measured under the same conditions.

For example, consider an ISE that responds to the concentration of sodium ions (Na+) in a solution. If the ISE also responds to other cations with the same charge, such as potassium ions (K+), then the selectivity coefficient for Na+ over K+ is the ratio of their activities that produce the same response in the ISE. This coefficient can be expressed as:

K(Na+, K+) = a(Na+)/a(K+)

where K(Na+, K+) is the selectivity coefficient, a(Na+) is the activity of Na+, and a(K+) is the activity of K+.

A high selectivity coefficient indicates that the ISE is more sensitive to the target ion than to other interfering ions, while a low selectivity coefficient indicates that the ISE responds similarly to both ions. The selectivity coefficient is an important parameter for the design and optimization of ISEs and is used to calculate the concentration of target ions in complex samples, such as biological fluids or environmental samples.

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Answer:

They must be dissolving.

Explanation:

Acid molecules must cling to remaining food molecules and slowly dissolve them.

Answer: The moon's gravitational pull generates something called the tidal force. The tidal force causes Earth—and its water—to bulge out on the side closest to the moon and the side farthest from the moon. These bulges of water are high tides

Explanation:

The moon's gravity affects the oceans nearest the moon because the moon's gravity pulls water into a tidal bulge is a true statement.

The tidal force is the result of the moon's gravitational pull.

The tidal force causes Earth—and its water—to bulge out on its closest and furthest sides from the moon. High tides cause these water bulges.

Thus, the statement is correct.

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Answer:

a

barium

b

calcium

e

aluminum

f

magnesium

g

copper

Forms cation

Explanation:

Answer:

Aqua regia is a corrosive, fuming yellow solution that is a 1:3 mixture of concentrated nitric and hydrochloric acids.

Aqua regia is a mixture of hydrochloric acid (HCl) and nitric acid (HNO3) at a ratio of either 3:1 or 4:1. It is a reddish-orange or yellowish-orange fuming liquid. The term is a Latin phrase, meaning "king's water". The name reflects the ability of aqua regia to dissolve the noble metals gold, platinum, and palladium.

447.81830943999995. that's the mass

Bohr's model lacked orbitals again for electrons or the electron cloud, contrary to Dalton's theory, which was founded on the idea that every element is made up of its own distinct variety of an indivisible atom.

According to the theory, an atom contains a small, dense, positive charge centre known as the nucleus, where practically every bit of mass was concentrated. Light, particles with negative charges called electrons then orbit far from the nucleus in a manner similar to how planets circle the Sun.

Dalton proposed his atomic hypothesis based on all of his observations. It's frequently called the billiards ball model. Due to the lack of understanding of the atomic electrons and the nucleus at the time, he described an atom as a ball-like structure.

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Answer:

B.)Schrodinger's model

Explanation:

Answer:

a

Explanation:

im thinking because the water is a room temperature there shouldnt be anm immence amount og heat energy for it to have a good amount of energy tho i could be wrong because its not moving it could have no energy.

Answer: please tell me i have this exact thing on a test rn i need the answer

Explanation:

Answer:

The answer is carbon and silicon

Best describe table sugar is considered a pure substance is Sugar has the same chemical composition throughout

Table sugar is pure sucrose derived from sugar beet or sugar cane and sucrose is the disaccharide consisting of glucose and fructose and it is produced by green plant in the process of photosynthesis and since the chemical composition of sugar is definite and does not vary hence it is pure substance and table sugar refer to standard while white sugar that you see in your cooking baking or cup of tea at home and the scientific name foe table sugar is sucrose

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Answer:

5 grams of iron react with 5 grams of oxygen to produce iron 3 oxide.

The actual yield of the reaction is--- 5 grams.

What is the percent yield?

Explanation:

The balanced chemical equation of the reaction is:

\(4Fe(s)+3O_{2} (g)->2Fe_{2} O_3(s)\)

1)Identify the limiting reagent.

2)Using the limiting reagent calculate the amount of theoretical yield formed.

Identification of limiting reagent:

4 mol of Fe reacts with 3mol. of O2

that is:

4mol(55.84g/mol) of Fe reacts with ---- 3mol (32.0g/mol)

=223.36g of Fe reacts with ---- 96g. of O2

then,

5g of Fe requires how many grams of O2?

\(=>5g. of Fe * \frac{96g O2}{223.36g Fe} \\=2.14g. of O_{2} .\\\)

But provided 5g of O2.

So, O2 is present more than required.

Hence, O2 is the excess reagent and the limiting reagent is Fe.

The amount of product formed depends only on the amount of Fe only.

Theoretical yield:

From the balanced chemical equation:

4mol. of Fe forms ----- 2mol. of Fe2O3.

that is

223.36g of Fe forms --- 2(159.68g)of Fe2O3.

=>223.36g of Fe forms --- 319.36g of Fe2O3.

then,

5g of Fe forms ----? grams of Fe2O3

\(=>5g of Fe * \frac{319.36g Fe2O3}{223.36g of Fe} \\=7.14g. of Fe2O3\\\)

\(%Error =\frac{actual yield}{theoretical yield} * 100\\\\ %error=\frac{5g}{7.14g} * 100\\ %error =70.0\)% error=actual yield/ theoretical yield  x 100

%error=5g./7.14g  x100

=>%error=70.0

Hence, the answer is 70.0%.

Answer:

I will gain 1 electron

Ba will lose 2 electrons

Cs will lose 1 electron

Se will lose 2 electrons

Explanation:

If the volume of the container is decreased at constant temperature, pressure will increase and reaction will shift in the backward direction.

The provided chemical reaction at equilibrium is mentioned below:

\(CH_{4}(g) + H_{2} O(g)\)   ↔ \(CO (g) + 3H_{2}(g)\)

The number of molecules on reactant side is 2 and in product side is 4. When the volume of the container is decreased at constant temperature, the Pressure will increase. According to Le-Chatlier principle when the reaction is in equilibrium and the pressure increases, the reaction will shift in the direction having less number of molecules.

So, here on increase of pressure, reaction will shift in the backward direction i.e., towards the reactants.

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Answer:

Rate = k [HO2]

Rate constant = 0.8456us-1

Explanation:

The rate law is given as;

Rate = k [HO2]^x

Where x signify the order of reaction.

For an order of reaction, the rate constant is constant for all concentrations. We are going to use this to obtain the order of reaction.

Zero Order:

[A] = [A]o -kt

5.1 = 8.5 - k(0.6)

-k (0.6) = 5.1 - 8.5

k = 5.67

3.6 = 5.1 - k(0.4)

-k (0.4) = 3.6 - 5.1

k = 3.75

The fact that the rate constant was not constant means the reaction is not a zero order reaction.

First Order:

ln[A] = ln[A]o -kt

(5.1) = ln(8.5) - k(0.6)

-k (0.6) = ln(5.1) - ln(8.5)

k = 0.8524

ln(3.6) = ln(5.1) - k(0.4)

-k (0.4) = ln(3.6) - ln(5.1)

k = 0.8708

ln(2.6) = ln(3.6) - k (0.4-k (0.4) = ln(2.6) - ln(3.6)

k = 0.8136

From the three calculations we see that the value of the rate constant is fairly constant in the range of 0.8 This means our reaction is a first order reaction.

The rate law is given as;

Rate = k [HO2]

We can represent the rate constant as the average of the three rate constants calculated above;Rate constant = (0.8136 + 0.8708 + 0.8524 / 3)

Rate constant = 0.8456us-1

Because they only partially ionize in solution, carboxylic acids are weak acids. When compared to a solution of a strong acid at the same concentration, their solutions contain fewer hydrogen ions. At the same concentration, the pH of a weak acid will be higher than that of a strong acid. This statement is true.

A carboxylic acid is an organic acid with a carboxyl group attached to an R-group in organic chemistry. A carboxylic acid has the general formula RCOOH or RCO2H, where R refers to the alkyl, alkenyl, aryl, or other group. Carboxylic acids are found in abundance.

Carboxylic acids do this much more readily than most other classes of organic compounds, so they are referred to as stronger acids, despite being far weaker than the most important mineral acids—sulfuric (H2SO4), nitric (HNO3), and hydrochloric (HCL) (HCl).

Because of the following factors, carboxylic acid is weaker than HCl: Carboxylic acid ions do not completely dissociate in water. Carboxylic acid, as an organic acid, does not behave like other acids because it is not ionic.

Thus, carboxylic acids are weak acids.

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(c) Henry's constant. Henry's law states that the solubility of a gas in a liquid is directly proportional to the partial pressure of the gas above the liquid. Therefore, the concentration of the solute in the liquid media is directly related to the concentration of the solute in the gas phase.

It is named after the English chemist William Henry, who discovered the principle behind the constant. Henry's constant is used to describe the solubility of gases in liquids, and it is an important parameter in environmental chemistry and chemical engineering.

The value of Henry's constant depends on the properties of the solute, the solvent, and the temperature and pressure conditions.

The constant of proportionality is known as Henry's constant.

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