which statement is not true about ionic bonds

n Li = m Li / Mr Li

n Li = 20 / 7

n Li = 2.86 mol

n H2SO4 = m H2SO4 / Mr H2SO4

n H2SO4 = 98 / 98

n H2SO4 = 1 mol

H2SO4 is the limiting reactant

n H2 = (coef. H2 / coef. H2SO4) • n H2SO4

n H2 = (1/1) • 1

n H2 = 1 mol

m H2 = n H2 • Mr H2

m H2 = 1 • 2

m H2 = 2 gr

Metal ion indicators are compounds that change color when they bind to a metal ion. They are commonly used in EDTA (ethylene diamine tetraacetic acid) titrations, where EDTA acts as a chelating agent, binding to the metal ion to form a stable complex.

One important characteristic of a useful metal ion indicator is that it must bind the metal ion less strongly than EDTA does. This is because EDTA is typically added in excess to ensure complete complexation of the metal ion, and a strong metal ion indicator would compete with EDTA for the metal ion and interfere with the accuracy of the titration.

Metal ion indicators are not necessarily also acid-base indicators, but some can be both. In EDTA titrations, pH plays an important role in determining the stability of the metal-EDTA complex, so an indicator that can monitor pH changes as well as metal ion binding can be useful.

In summary, metal ion indicators are compounds that change color when they bind to a metal ion, and useful indicators must bind the metal ion less strongly than EDTA does.

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Asexual reproduction is faster tha sexual reproduction.

In asexual reproduction there is mitosis. There is prophase, metaphase, anaphase, and telphase. In sexual reproduction there is meiosis. Meiosis does have prophase, metaphase, anaphase, and telophase. But it has two stages of that. So it also has prophase 2, metaphase 2, anaphase 2, and telophase 2,

Explanation:

The elements that  is chemically similar to magnesium is calcium which is option B.

Magnesium (Mg) and calcium (Ca) have a place to the same group within the periodic table, Group 2, too known as the alkaline earth metals. Components within the same gather tend to have similar chemical properties due to the same number of valence electrons.

Both magnesium and calcium display similar chemical behavior. They promptly frame divalent cations (Mg2+ and Ca2+) by losing two valence electrons, and these cations are included in different chemical responses. They share likenesses in their reactivity, dissolvability in water, and arrangement of comparative compounds.

In this manner, among the choices given, calcium  (Ca) is chemically comparative to magnesium (Mg).

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Answer:

C. The greater the pressure

Explanation: If they move faster, the particles will exert a greater force on the container each time they hit the walls, which leads to an increase in the pressure of the gas. If the walls of the container are flexible, it will expand until the pressure of the gas once more balances the pressure of the atmosphere.

Answer: Greater The Pressure

Explanation: Greater velocity results in a greater pressure

The rate of reaction for the given reaction is -0.258 m/s.

The given rate of reaction can be written as:

δ[BrO₃⁻]/δt = 3 * δ[BrO₋]/δt = -0.086 m/s

Using the stoichiometric coefficients of the reactant and product in the balanced equation:

In this case, the stoichiometric coefficient of BrO₋ is 3, which means that for every one mole of BrO₋ consumed, three moles of BrO₃⁻ are produced.

Since the rate of change of concentration of BrO₋ is given as -0.086 m/s, we can calculate the rate of reaction by multiplying it by the stoichiometric coefficient:

Rate of reaction = 3 * (-0.086 m/s)

Rate of reaction = -0.258 m/s

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Answer:

The gas that has the highest concentration throughout the entire ocean is nitrogen. Nitrogen gas (N2) makes up about 78% of the Earth's atmosphere and it is highly soluble in water. As a result, it dissolves easily in the ocean and is distributed throughout the entire water column. Oxygen (O2) is the second most abundant gas in the atmosphere, but it is less soluble in water than nitrogen and is more concentrated in the surface waters of the ocean. Carbon dioxide (CO2) is also an important gas in the ocean, but its concentration is much lower than nitrogen and oxygen.

The gas with the highest concentration throughout the entire ocean is nitrogen.

The ocean is composed of various gases, including nitrogen, oxygen, carbon dioxide, and others. However, the gas with the highest concentration throughout the entire ocean is nitrogen. Nitrogen makes up approximately 78% of the Earth's atmosphere, and it dissolves easily in water. As a result, nitrogen is the most abundant gas in the ocean.

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Answer:

The capacity for doing work. It may exist in potential, kinetic, thermal, electrical, chemical, nuclear, etc.

Answer: 5 ml

Explanation:

15 Ml minus the 10 the water takes up = volume of the rock

The element that is most easily oxidized among Sn, Cu, and Mg is Sn. So, the correct answer is (B) Sn.

Based on the activity series given, we can determine the element that is most easily oxidized among Sn (tin), Cu (copper), and Mg (magnesium).

The activity series lists the elements in order of their reactivity, with the most reactive element at the top and the least reactive at the bottom. The element that is most easily oxidized is the one that readily loses electrons and forms positive ions.

Looking at the activity series, we can see that Sn appears above Cu and Mg. This indicates that Sn is more easily oxidized than Cu and Mg. In other words, Sn has a higher tendency to lose electrons and form Sn2+ ions compared to Cu and Mg.

On the other hand, Cu appears below Sn and above Mg, which means it is less easily oxidized than Sn but more easily oxidized than Mg. Similarly, Mg appears at the bottom of the activity series, indicating that it is the least easily oxidized among the three elements.

Therefore, the element that is most easily oxidized among Sn, Cu, and Mg is Sn. So, the correct answer is (B) Sn.

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In order to properly mix these two components together, they must be poured into a special holder called a dappen dish.

When it comes to creating artificial nails using acrylics, the process involves mixing a monomer liquid and polymer powder together to form a pliable mixture that can be shaped and molded. However, in order to properly mix these two components together, they must be poured into a special holder called a dappen dish. This small glass or plastic container is designed to hold the monomer and polymer powder until they are ready to be mixed together with a brush.

The dappen dish allows for precise measurements and easy access to the mixture during the application process. Overall, the dappen dish is a crucial tool in the acrylic nail application process, as it provides a convenient and efficient way to mix the monomer liquid and polymer powder together.

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The experimental percentage yield is the ratio of the actual yield of the product of a reaction to its theoretical yield multiplied by 100.

Percentage yield of a reaction is used to study the efficiency of a chemical reaction. It is the ratio of the actual yield to the theoretical yield multiplied by 100.

The actual yield of a reaction is the experimentally obtained value and it will be less than theoretical yield which is derived from the balanced chemical equation of the reaction.

For example if 5 g be the actual yield of the product in a reaction, but the theoretical or expected yield derived from the equation be 7 g.

then the percentage yield  = 5 /7 × 100 = 71.4 %.

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The neutralization reaction between Al(OH)\(_{3}\) and HNO\(_{3}\) results in the formation of a salt with the formula Al(NO\(_{3}\))\(_{3}\).

This reaction is a classic acid-base reaction where the base Al(OH)\(_{3}\) reacts with the acid HNO\(_{3}\) to produce a salt and water. The Al(OH)\(_{3}\) acts as a base by accepting protons from the HNO\(_{3}\) acid, which then results in the formation of Al(NO\(_{3}\))\(_{3}\) salt.

The salt is formed when the metal cation \(Al^{3+}\) combines with the anion \(NO^{3-}\), which has a negative charge. The neutralization reaction between Al(OH)\(_{3}\) and HNO\(_{3}\) is an important process used in industries such as pharmaceuticals and water treatment.

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Answer: 371 g MgCl2

Explanation:

If a reaction seems to lead to an increase in order, then we can assume that: c. ΔS is negative

the reaction becomes spontaneous (ΔG°<0) at temperatures above 1100K (high temperatures), it necessary that c. ΔH° is positive and ΔS° is positive as the entropy will drive the spontaneousness as it becomes smaller than TΔS°.

Delta S is basically a measure of the change in order/disorder of the reaction. Increasing order gives us a negative delta S value, and decreasing order gives a positive delta S value. Easy ways to detect a change in entropy are phase changes (a solid has less entropy than a liquid, which has less entropy than a gas) and an overall change in moles of gas from reactants to products (an increase in moles of gas would indicate disorder over a wider area, which is an increase in entropy)

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Answer:

multitide of uses (drinking, cleaning, cooking, transportation). Without water we would not survive. -Lead atoms bond together and they make up the lead that we use as a pencil. -Copper atoms, aluminum atoms, nickel atoms, etc., all make up metal which is used for a variety of things in everyday life.

Explanation:

Answer:

Calculate the percentage by mass of sulfur in tetraoxosulphate(IV) acid,

H

2

S

O

4

.

Percentage by Mass of An Element in a Compound:

The molar mass of an element or a compound tells us the mass of one mole of that substance. For an element, the molar mass can be read off from a periodic table; whereas, for a compound, it needs to be computed manually by adding up the molar masses of the constituent elements while considering the number of atoms of each of them.

If we know the molar mass of an element and that of the compound, then we can proceed to find the ratio of the two, which, when multiplied by 100%, tells us the percentage by mass of that element in the compound.

Answer and Explanation:

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We need to find the molar mass of this acid, sulfuric acid:

2

g

/

m

o

l

+

32

g

/

m

o

l

+

4

(

16

g

/

m

o

l

)

=

98

g

/

m

o

l

.

Food A would be richer in calories than food B.

The term calories refers to the energy content of food. It is the mount of energy that is contained in food. In a food label, we can see the various calorific value of the ingredients in the food. This could help especially when one is trying the control the calories in diet.

Looking at food label A, the greatest calories come from carbohydrates while in food label B, the greatest calories come from proteins. We know that carbohydrates contains a lot more calories than proteins.

This implies that food A would be richer in calories than food B.

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Answer:

ion

Explanation:

that is the definition according to g o o g l e:

"an atom or molecule with a net electric charge due to the loss or gain of one or more electrons."

Answer:

An ION

Explanation:

Because a positive ion is called a CATION and a negative ion is called an ANION (Please brainlist me)

The density of the liquid is 1.05 g/ml. To find the volume of 1.05 g of the liquid, we can use the formula:

Density = Mass / Volume

Solving for Volume, we get:

Volume = Mass / Density

Substituting the given values, we get:

Volume = 1.05 g / 1.05 g/ml

Volume = 1 ml

To convert ml to liters, we divide by 1000:

Volume = 1 ml / 1000

Volume = 0.001 L

Therefore, the volume of 1.05 g of this liquid is 0.001 liters.

To find the volume of 1.05 g of a liquid with a density of 1.05 g/mL, you can use the formula:

Volume = Mass / Density

Given:
Mass = 1.05 g
Density = 1.05 g/mL

Now, plug the values into the formula:

Volume = 1.05 g / 1.05 g/mL = 1 mL

Since 1 L equals 1000 mL, you'll need to convert the volume from mL to L:

Volume = 1 mL * (1 L / 1000 mL) = 0.001 L

So, the volume of 1.05 g of this liquid is 0.001 liters.

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The standard free energy change in kJ for the reaction 2Fe³⁺(aq) + Pb(s) → 2Fe²⁺(aq) + Pb²⁺(aq) is 128.8 kJ.

To determine the standard free energy change in kJ for the reaction 2Fe³⁺(aq) + Pb(s) → 2Fe²⁺(aq) + Pb²⁺(aq), we must follow these steps.

1. The given redox reaction can be represented as 2Fe³⁺(aq) + Pb(s) → 2Fe²⁺(aq) + Pb²⁺(aq)

2. The half-reactions can be represented as:

Fe³⁺(aq) + e⁻ → Fe²⁺(aq) ..... (Reduction)

Pb²⁺(aq) + 2e⁻ → Pb(s) ........ (Oxidation)

For Fe³⁺ → Fe²⁺, E° = +0.77 V

Pb²⁺ → Pb, E° = -0.13 V

On reversing the oxidation reaction, the standard reduction potential value also changes in sign.

2Pb(s) → 2Pb²⁺(aq) + 4e⁻ ..... (Reverse of oxidation)

Pb²⁺(aq) + 2e⁻ → Pb(s) .......... (Oxidation)

Here, the standard reduction potential value is: -[-0.13] V = +0.13 V

Using the Nernst equation:

Ecell = E°cell - (0.0592/n) log(Q)

In standard conditions, the reaction quotient Q = 1.

Ecell = E°cell - (0.0592/n) log(1)

Ecell = E°cell

At equilibrium, ΔG = -nFE = -nFE°cell

Using the values in the equation,

-nFE°cell = -2 × 96500 × (0.77 - 0.13) joules

Dividing by 1000 to convert the value into kJ:

nFE°cell = 128.8 kJ

Thus, the standard free energy change in kJ for the given reaction is 128.8 kJ.

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Answer:the parts of the body which is nearest to  the ground ie thier back will show discoloration

Explanation:

If the body remains at a position for long hours, the parts of the body which is nearest to  the ground can develop a skin discoloration as a result of pooling of blood in the tissues and this is called livor mortis, which tends to be permanent from 8Hours upwards.

The rate constant, if the concentration of a decrease from 1.50 m to 0.367 m after 141.4 seconds the numerical value of k = 0.01460.

A rate constant is a number that describes the relationship between the rate of a chemical reaction and the molar concentration of the reactants. We can learn about the variables that affect a reaction's rate by looking at its rate constant. We can determine the dependence of the molar concentration of the reactants on the rate of reaction by knowing the rate constant.

The abundance of a constituent divided by the sum of the mixture's volumes is the definition of concentration in chemistry. There are several different categories of mathematical description: mass concentration, molar concentration, number concentration, and volume concentration. notably the state of concentration turning the focus on a single thing My focus is being disturbed by all that noise.

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The mass number of an atom of potassium that has 20 neutrons is option C. 39

Mass number-

Mass number is the total number of protons and neutrons in the nucleus of an atom is called the mass number. It is represented by the symbol A. In other words, mass number refers to the sum of the number of protons and neutrons in the nucleus of an atom.

Atom-

Atoms are tiny particles that make up everything in the world. Everything in the world is made up of tiny particles known as atoms. An atom is the basic unit of matter. The term "atom" comes from the Greek word atomos, which means indivisible.

The basic building blocks of all matter are atoms, which are made up of three types of particles: protons, neutrons, and electrons.

In a neutral atom, the number of electrons is equal to the number of protons, thus the overall charge on the atom is zero. However, the mass number of the atom is equal to the sum of the number of protons and neutrons.

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Answer:

4K + O2 ---> 2K2O

Explanation:

The valence of Potassium is +1

The valence of oxygen is -2

Thus, two atoms of potassium will attach with one atom of oxygen to form molecule of potassium oxide.

This can be written as

2K + O ---> K2O

However, this is not the balanced equation as oxygen exists as O2 molecule.

Thus, the balanced equation is

4K + O2 ---> 2K2O

The region that does not match its description is the fourth answer choice which is Abdominal region: spine

The cranial region encompasses the upper part of the head.

∴ The first answer choice matches its description.

The axillary region is an anatomical region under the shoulder joint where the arm connects to the shoulder. Therefore, it encompasses the armpits.

∴ The second answer choice matches its description.

The thoracic region runs from the base of the neck down to the abdomen. Therefore, it encompasses the chest

∴ The third answer choice matches its description

The abdominal region is divided into four quadrants which include are

1. Right upper quadrant fossa (RUQ)

2. Right lower quadrant fossa (RLQ)

3. Left lower quadrant fossa (LLQ)

4. Left upper quadrant fossa (LUQ)

It is also divided into nine (9) areas, all of which does not include the spine.

∴ The fourth answer choice does NOT match its description.

Hence, the region that does not match its description is the fourth answer choice which is Abdominal region: spine

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Answer:

C) Carla participated in an artistic activity, while Maurice participated in a scientific activity.

Explanation:

Scientific activities involve making observations, which ultimately leads to the series of steps that aims at solving the observed problem or answering a question that arises from the problem. This is the case of Maurice who is observing and recording information about ants in order to solve a curiosity (about what they feed on).

However, on the other hand, Carla is given a pictorial representation of the ants and what they carry. It is not based on curiosity or to answer a question about the ants but rather for decoration or aesthetic purposes, which is what makes her activity artistic.