How many mL of 14.5M lithium carbonate solution must be used to deliver 4.20 g of lithium ion

An example of human intervention in the genes is; humans breed dogs to be smaller and more friendly. Option A

We know that the gene is the unit of inheritance that can be found in the chromosome of the organism. The genes that the organism does have is what would tell must the observed traits of the organism and this is called the phenotype of the organism.

We know that human's do have an impact with the fact that the genes can spread in an organism. In many cases, we can see the alteration of the genes when we deal with the genetic make up of the pets.

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Explanation:

D. inner core and outer core

What we're going to do is to use the following:

Remember! Temperature must always be in Kelvin.

What we're going to do is to check the values that we know: (To pass from Celcius to Kelvin, what we do is to add 273.15)

V1 = 81.1 L

T1 = 31.5 °C = 304.65 K

P1 = 491.7 mmHg

V2 = 204 L

T2 = 6.9°C = 280.05 K

P2 = ?

What we're going to do is to replace all these values in the equation and then solve for P2:

Therefore, the correct answer is about 180 mmHg.

C. flow under dense and become more thick.

A substance that is tightly packed or has a high density.

The term "density" refers to the relationship between a substance's mass and the volume it takes up in space (volume). The mass, size, and arrangement of an object's atoms influence its density. The ratio of a substance's mass to its volume is said to be its density, or D.

Because it enables us to predict which compounds will float and which will sink in a liquid, density is a crucial notion. An object will frequently float as long as its density is less than that of the liquid.

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Answer:

0.286 M

Explanation:

This is a great example of a practice problem that requires you to use the formula for dilution calculations.

To make it more interesting, let's assume that you're not familiar with that problem.

The most important thing to remember about a dilution is the the number of moles of solute must remain constant.

That is, the number of moles of solute present in the initial solution must be equal to the number of moles of solute present in the diluted solution.

Since molarity is defined as moles of solute per liter of solution, keeping the number of moles of solute constant allows you to decrease concentration by increasing the total volume of the solution.

195 ml of 0.355 ml NaCl is added to a 0.500 ml volumetric flask and the flask is filled with water. The [ Na⁺ ] concentration in the diluted solution is 138.45 M

Concentration is calculated by dividing a constituent's abundance by the mixture's total volume. Mass concentration, molar concentration, number concentration, and volume concentration are four different categories of mathematical description.

Molarity is the number of moles of solute per liter of solution and mole fraction is the proportion of solute moles to all other moles of substances present. Parts per thousand grams, mass percentage, the ratio of the solute's mass to the solution's mass multiplied by 100.

M₁ V₁ = M₂ V₂

0.355 × 195 = M₂ × 0.500

M₂ = 0.355 × 195 ÷ 0.500

138.45 M

Thus, The [ Na⁺ ] concentration in the diluted solution is 138.45 M

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The question is incomplete. Here is the complete question.

When 2.10 g of a certain molecular compound X are dissolved in 65.0 g of benzene (C₆H₆), the freezing point of the solution is measured to be 3.5°C. Calculate the molar mass of X. If you need any additional information on benzene, use only what you find in the ALEKS Data resource. Also, be sure your answer has a unit symbol, and is rounded to 2 significant digits.

Answer: MM = 47.30 g/mol.

Explanation: There is a relationship between freezing point depression and molality. With this last one, is possible to calculate molar mass or molar weight of a compound.

Freezing Point Depression occurs when a solute is added to a solvent: the freezing point of the solvent decreases when a non-volatile solute is incremented.

Molality or molal concentration is a quantity of solute dissolved in a certain mass, in kg, of solvent. Its symbol is m and it's defined as

\(m=\frac{moles(solute)}{kg(solvent)}\)

Freezing point depression and molal are related as the following:

\(\Delta T_{f}=K_{f}.m\)

where

\(\Delta T_{f}\) is freezing point depression of solution

\(K_{f}\) is molal freezing point depression constant

m is molality

Now, to determine molar mass, first, find molality of the mixture:

\(\Delta T_{f}=K_{f}.m\)

\(m=\frac{\Delta T_{f}}{K_{f}}\)

For benzene, constant is 5.12°C/molal. Then

\(m=\frac{3.5}{5.12}\)

m = 0.683 molal

Second, knowing the relationship between molal and moles of solute, determine the last one:

\(m=\frac{moles(solute)}{kg(solvent)}\)

\(mol(solute)=m.kg(solvent)\)

mol(solute) = 0.683(0.065)

mol(solute) = 0.044 mol

The definition for Molar mass is the mass in grams of 1 mol of substance:

\(n(moles)=\frac{m(g)}{MM(g/mol)}\)

\(MM=\frac{m}{n}\)

In the mixture, there are 0.044 moles of X, so its molecular mass is

\(MM=\frac{2.1}{0.044}\)

MM = 47.30 g/mol

The molecular compound X has molecular mass of 47.30 g/mol.

Answer:

C. molten rock below Earth’s surface

Explanation:

Answer:

Atomic radii vary in a predictable way across the periodic table. As can be seen in the figures below, the atomic radius increases from top to bottom in a group, and decreases from left to right across a period. Thus, helium is the smallest element, and francium is the largest.

Explanation:

a) The balanced equation for the reaction would be as follows:

\(2 Al(OH)_3 + 3 H_2SO_4 ---> Al_2(SO_4)_3 + 6 H_2O\)

b) The mole ratio of aluminum hydroxide to sulfuric acid is 2:3. This means that every 1 mole of the aluminum hydroxide would require 1.5 moles of sulfuric acid.

0.5 mole aluminum hydroxide would require:

         0.5 x 3/2 = 0.75 moles of sulfuric acid.

But only 0.500 moles of sulfuric acid is present. Thus, the limiting reagent is sulfuric acid.

c) With 0.5 moles sulfuric acid, the mole of aluminum hydroxide required would be:

             0.5 x 2/3 = 0.33

Excess moles of aluminum hydroxide = 0.5 - 0.33

                                                              = 0.17 moles

d) The mole ratio of sulfuric acid to aluminum sulfate produced is 3:1. With 0.5 moles sulfuric acid, the mole of aluminum sulfate produced would be:

        0.5 x 1/3 = 0.17 moles

But the percentage yield is 77%

   77/100 x 0.17 = 0.13 moles

Thus, the moles of aluminum sulfate that would be obtained with a percentage yield of 77% would be 0.13 moles.

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Answer:

a steep-sided glacial valley

Explanation:

A fjord is a long, narrow inlet with steep sides or cliffs, created by a glacier. It is a long, deep, narrow body of water that reaches far inland. Fjords are found mainly in Norway, Chile, New Zealand, Canada, Greenland, and Alaska. They are formed when a glacier cuts a U-shaped valley by ice segregation and abrasion of the surrounding bedrock. According to the standard model, glaciers formed in pre-glacial valleys with a gently sloping valley floor. The work of the glacier then left an over deepened U-shaped valley that ends abruptly at a valley or trough end. Such valleys are fjords when flooded by the ocean. Thresholds above sea level create freshwater lakes.

Answer:there are 13

Explanation:

There are two types of chemical compound one is covalent compound and another is ionic compound in chemistry. In ionic bonds, electrons are completely transferred. Therefore, there are 2 pi bonds in oxalate ion C\(_2\)O\(_4\)²⁻.

Chemical Compound is a combination of molecule, Molecule forms by combination of element and element forms by combination of atoms in fixed proportion.

Covalent compounds are formed by covalent bond and ionic compounds are formed by ionic bond. Covalent bond is formed by sharing of electron and ionic bond are formed by complete transfer of electron. Ionic bonds are stronger than covalent bonds. The melting and boiling points are higher in ionic compounds. There are total 2 pi bonds in oxalate ion C\(_2\)O\(_4\)²⁻.

Therefore, there are 2 pi bonds in oxalate ion C\(_2\)O\(_4\)²⁻.

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Wear personal defence tools, follow the guidelines and be careful with chemicals. Measure 14.72g of \(H_2SO_4\), dissolve in distilled water, and make up to 400mL in a volumetric flask.

1. Always wear appropriate personal protective equipment such as gloves, goggles, and lab coat.

2. Read and follow the instructions carefully before handling any chemical.

3. Handle the chemicals in a well-ventilated area to prevent inhalation of harmful fumes.

To prepare a 0.2M solution of tetraoxosulphate (VI) acid in a \(400cm^3\)  volumetric flask:

Calculate the amount of tetraoxosulphate (VI) acid required using the formula:

Mass = (Molarity x Volume x Molecular weight) / 1000

Where:

Molarity = 0.2M

Volume =\(400cm^3\)

Molecular weight = (4x16) + 32 + (6x16) = 98g/mol

Mass = (0.2 x 400 x 98) / 1000 = 7.84g

Weigh out 7.84g of tetraoxosulphate (VI) acid using a balance.

Transfer the weighed tetraoxosulphate (VI) acid into the \(400cm^3\) volumetric flask using a funnel.

Add distilled water to the flask until the volume reaches the \(400cm^3\) mark on the neck of the flask.

Stopper the flask and mix the solution thoroughly by inverting the flask several times.

It is important to specify the density of the tetraoxosulphate (VI) acid, as this will affect the mass required for the solution. In this case, the percentage purity of the acid is also given, which can be used to calculate the actual mass of the tetraoxosulphate (VI) acid needed.

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Answer:

What is it that you need help with? Pls provide content.

Explanation:

Answer:

Sculptures rarer than paintings.

Explanation:

Answer:

C. Sculptures rather than paintings

Explanation:

Answer:

C

Explanation:

C. The electronegativity value of calcium is lower than the electronegativity value of silicon

is the only correct statement.

Answer:

Si System

hope this helped!

This representation suggests that the element is phosphorus (P) with a mass number of 30, which is incorrect. The correct mass number for phosphorus is approximately 30.97. The incorrect representation for a neutral atom is 36Li

To determine the correct representation for a neutral atom, we need to consider the atomic number (Z) and mass number (A) of the element. The atomic number represents the number of protons in the nucleus, while the mass number represents the sum of protons and neutrons.

Let's analyze the given representations:

36Li:

This representation suggests that the element is lithium (Li) with a mass number of 36, which is incorrect. The correct mass number for lithium is approximately 6.94.

613C:

This representation suggests that the element is carbon (C) with a mass number of 13, which is correct. Carbon has different isotopes, and 13C represents one of its stable isotopes.

3063Cu:

This representation suggests that the element is copper (Cu) with a mass number of 63, which is correct. Copper has different isotopes, and 63Cu represents one of its stable isotopes.

1530P:

This representation suggests that the element is phosphorus (P) with a mass number of 30, which is incorrect. The correct mass number for phosphorus is approximately 30.97.

Therefore, the incorrect representation for a neutral atom is 36Li, as it does not match the known properties of lithium.

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Answer:

407pm is the edge length of the cubic unit cell

Explanation:

In a Face-centered cubic unit you can use Pythagoras theorem to relate edge length with atomic radius (As you can see in the picture), thus:

e²+e² = (4r)²

2e² = 16r²

e = √8 r

If the atomic radius of the atom is 144pm:

e = √8 ×144pm

e = 407ppm

407pm is the edge length of the cubic unit cell

Given the data from the question, the mass of arsenic that contains 1.23×10²⁰ atoms is 0.0153 g

6.02×10²³ atoms = 1 mole of arsenic

But

1 mole of arsenic = 75 g

Thus, we can say that:

6.02×10²³ atoms = 75 g of arsenic

6.02×10²³ atoms = 75 g of arsenic

Therefore,

1.23×10²⁰ atoms = (1.23×10²⁰ × 75) / 6.02×10²³ atoms)

1.23×10²⁰ atoms = 0.0153 g of arsenic

Thus, 1.23×10²⁰ atoms is present in 0.0153 g of arsenic

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The amount of heat energy produced when 1 g of hydrogen and 2 g of nitrogen are reacted, is -6.61 KJ

First, we shall obtain the limiting reactant. Details below:

3H₂ + N₂ -> 2NH₃

From the balanced equation above,

28 g of N₂ reacted with 6 g of H₂

Therefore,

2 g of N₂ will react with = (2 × 6) / 28 = 0.43 g of H₂

We can see that only 0.43 g of H₂ is needed in the reaction.

Thus, the limiting reactant is N₂

Finally, we the amount of heat energy produced. Details below:

3H₂ + N₂ -> 2NH₃ ΔH = -92.6 KJ

From the balanced equation above,

When 28 grams of N₂ reacted, -92.6 KJ of heat energy were produced.

Therefore,

When 2 grams of N₂ will react to produce = (2 × -92.6) / 28 = -6.61 KJ

Thus the heat energy produced from the reaction is -6.61 KJ

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Answer:

819.45 K

Explanation:

Use the Ideal Gas Law to make sense of this problem, PV = nRT. From this equation, we know that pressure is directly proportional to temperature and that volume is also directly proportional to temperature. Therefore, doubling the temperature would double the pressure, and doubling the temperature would also double the volume. In the described scenario, the temperature is doubled twice, so the temperature is quadrupled (i.e. three times its original amount has been added).

The initial temperature was 273.15 K. Multiply this by 3 to get your answer of 819.45 K.

In evolution, isolation means one group is separated and isolated from a population to study the adaption of evolutionary changes over a period of time.

A natural phenomenon called evolution describes how inheritable traits of a species alter through time.

Natural selection, mutation, genetic drift, and migration are the key drivers. Geographical or reproductive isolation stop the exchange of genetic material across populations. As a consequence of adaptation to a particular environment or niche throughout time, populations of many species changed (natural selection).

When there is a barrier that the creatures can't overcome, they become isolated, which implies they are separated from other members of their species. The isolation of organisms is a consequence of environmental change. When mountain ranges or deserts emerge or when continents separate, isolation may develop gradually.

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Approximately 13,412.48 Joules of heat are required to raise the temperature of 16.1 g of water from −25 °C to 175 °C.

What is Temperature?

Temperature is a measure of the degree of hotness or coldness of a substance, object or environment. It is a physical quantity that expresses the average kinetic energy of the particles that make up a substance or system.

q = m * c * ΔT

where q is the amount of heat required (in Joules), m is the mass of the substance (in grams), c is the specific heat capacity of the substance (in J/g·°C), and ΔT is the change in temperature (in °C).

In this case, we are given the mass of water (m = 16.1 g), the initial temperature (T1 = −25 °C), and the final temperature (T2 = 175 °C).

ΔT = T2 - T1 = 175 °C - (-25 °C) = 200 °C

Next, we can use the equation above to calculate the amount of heat required:

q = m * c * ΔT

= 16.1 g * 4.184 J/g·°C * 200 °C

= 13,412.48 J

Therefore, approximately 13,412.48 Joules of heat are required to raise the temperature of 16.1 g of water from −25 °C to 175 °C.

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The compound that is a base from the given list is Ca(OH)2. Option 2.

What is a base?

A base is a chemical substance that produces hydroxyl ions as the only negative ion in aqueous solutions.

Ca(OH)2 is calcium hydroxide, which is a chemical compound consisting of one calcium ion (Ca2+) and two hydroxide ions (OH-).

It is classified as a base because, when it dissolves in water, it produces hydroxide ions that can accept protons (H+) from acids in a process known as a neutralization reaction.

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Answer:

11

Explanation:

Atomic number is the number of PROTONS an element has .

Answer:

Starch reacts with Iodine in the presence of Iodide ion to form an intensely colored blue complex, which is visible at very low concentrations of Iodine, making it a very good indicator in both direct and indirect lodometric titrations.

Explanation:

hope this helps

Answer:

Бардык белгилүү авиация мыйзамдарына ылайык, аары учуу мүмкүнчүлүгү жок. Канаттары өтө эле кичинекей, семиз денесин чече албайт. Албетте, аары баары бир учат. Себеби аарылар адам мүмкүн эмес деп эсептеген нерсеге маани бербейт.

Explanation:

Канаттары өтө эле кичинекей, семиз денесин чече албайт. Албетте, аары баары бир учат. Себеби аарылар адам мүмкүн эмес деп эсептеген нерсеге маани бербейт.

Explanation:

Refer to pic...........