which of the follow statements is false? [select all that apply]group of answer choiceswhen a strong acid dissolves in water it ionizes completely.when a weak acid dissolves in water it ionizes completely.when a strong base dissolves in water it ionizes completely.when a weak base dissolves in water it ionizes completely.

Answer:

1.44moles

Explanation:

Given parameters:

Number of atoms  = 8.86 x 10²³atoms

Unknown:

Number of moles  = ?

Solution:

From the mole concept;

  Number of moles  = \(\frac{number of atoms }{6.02 x 10^{23} }\)  

 Number of atoms  = 8.86 x 10²³atoms

 Number of moles  = \(\frac{8.68 x 10^{23} }{6.02 x 10^{23} }\)

 Number of moles  = 1.44moles

High melting points are properties of ionic compounds. An electrically neutral substance made up of positive and negative ions is known as an ionic compound.

A chemical molecule known as an ionic compound in chemistry is one that contains ions held together by the electrostatic forces known as ionic bonding. Despite having both positively and negatively charged ions, or cations and anions, the compound is generally neutral. These can be polyatomic species like the ammonium and carbonate ions in ammonium carbonate or straightforward ions like the sodium and chloride  ions in sodium chloride. Since individual ions in an ionic compound typically have more than one closest neighbor, they are not thought of as belonging to molecules but rather as components of an ongoing three-dimensional network. When solid, ionic substances typically have crystalline structures.

Ionic substances have the qualities listed below:

1. They are brittle and crystalline crystals.

2. Both their melting and boiling temperatures are high.

3. Water can dissolve them.

4. Both in their molten and solution forms, they conduct electricity.

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Answer:

I think it's positive charge

Answer:

0.202M

Explanation:

you will want to use C₁V₁=C₂V₂ to solve for this.

C₁ is the initial concentration, in this problem it is .458 mol/L or M

V₁ is the initial volume, so it will be the 22.0 mL or 0.0220L

C₂ is the new concentration but here it is unknown.

V₂ is the new volume which is 50.0 mL or 0.0500L.

1. So now we plug this information in to the equation:

\((.458 mol/l)(0.0220L)=(C_{2} )(0.0500L)\)

2. We then do algebra to get C₂ alone:

\(C_{2} =\frac{(.458 mol/L)(0.0220L)}{(0.0500L)} =0.20152 mol/L or M\)

The liters cancel out and take note of the significant figures, there are 3 digits in all numbers in the question, so that means your answer must contain 3 sig figs. The answer 0.0202 rounded.

** instead of converting the mL to L you can also just keep them mL since they will be crossed out anyway. You will still get the correct answer.

Hope this help you! good luck :)

Answer:

Explanation:

english please

When 60.0 g of carbon is burned in 160.0 g of oxygen, 220.0 g of carbon dioxide is formed. 60.0 g mass of carbon dioxide is formed when 60.0 g of carbon is burned in 750.0g of oxygen.

To solve this problem, we can use the concept of stoichiometry and the balanced chemical equation for the combustion of carbon to form carbon dioxide. The balanced equation is as follows:

C + O₂ → CO₂

According to the equation, one mole of carbon reacts with one mole of oxygen to produce one mole of carbon dioxide.

Calculate the number of moles of carbon and oxygen in the given scenario:

Molar mass of carbon (C) = 12.01 g/mol

Molar mass of oxygen (O₂) = 32.00 g/mol (16.00 g/mol × 2)

Number of moles of carbon = Mass of carbon / Molar mass of carbon

Number of moles of carbon = 60.0 g / 12.01 g/mol = 4.998 mol (rounded to three decimal places)

Number of moles of oxygen = Mass of oxygen / Molar mass of oxygen

Number of moles of oxygen = 750.0 g / 32.00 g/mol = 23.438 mol (rounded to three decimal places)

Since the balanced equation shows a 1:1 ratio between carbon and carbon dioxide, we can infer that 4.998 moles of carbon will produce 4.998 moles of carbon dioxide.

Now, using the molar mass of carbon dioxide (44.01 g/mol), we can calculate the mass of carbon dioxide produced:

Mass of carbon dioxide = Number of moles of carbon dioxide × Molar mass of carbon dioxide

Mass of carbon dioxide = 4.998 mol × 44.01 g/mol = 219.92 g (rounded to two decimal places)

Therefore, when 60.0 g of carbon is burned in 750.0 g of oxygen, approximately 219.92 g of carbon dioxide is formed.

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Answer:

D

Explanation:

You need both, independant and dependant variables for a hypothesis.

A. Phospholipase-C is activated, which cleaves PI 4,5P2 to release IP3. IP3 binds to a specific receptor on the endoplasmic reticulum, which triggers the release of Ca2+ into the cytoplasm.

The answer is A. Phospholipase-C is activated, which cleaves PI (4,5) P2 to release IP3. IP3 binds to a specific receptor on the endoplasmic reticulum, which triggers the release of Ca2+ into the cytoplasm. B. Phospholipase-C is activated, which cleaves PI (4,5) P2 to release soluble DAG. DAG binds to a specific receptor on the endoplasmic reticulum, which triggers the release of Ca2+ into the cytoplasm. C. Phospholipase-D is activated, which cleaves PI(3,4,5)P2 to release IP3. IP3 binds to a specific receptor on the endoplasmic reticulum, which triggers the release of Ca2+ into the cytoplasm. D. Ca2+ does not play a role in glycogen synthesis. E. Phospholipase-E is activated, which cleaves PI(4,5)P2 to release IP4,5. IP4,5 binds to a specific receptor on the endoplasmic reticulum, which triggers the release of Ca2+ into the cytoplasm.

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Answer:

Metilaminas

Explanation:

Las metilaminas a menudo están presentes en los tejidos corporales de organismos marinos como crustáceos, moluscos y en todos los peces marinos como N-óxido de trimetilamina, donde actúan para estabilizar la proteína que se desestabiliza por la presión y también se cree que actúa como un depresor del punto de congelación. en peces polares

Las metilaminas tienen olor a pescado podrido, basura o huevos podridos, de modo que una acumulación de metilamina en el cuerpo da como resultado la liberación de un olor a pescado en la amplitud, el sudor y la orina de un individuo

Answer:

the transmission of heat across matter

Explanation:

Conduction is the transmission of heat across matter. Even though heat flows across matter during conduction, the matter itself does not flow.

Answer:

The number of protons in X would be 6 while that

of Y would also be 6. Thus, the two atoms would be isotopes of the same element.

Atomic properties of atoms The mass number of an atom is the sum of protons and neutrons present in the atom.

For X with mass number 12 and neutron number 6, the number of protons would be:

12-6-6 protons

For Y with mass number 13 and neutron number 7, the number of protons would be:

13-7-6 protons.

Thus, both atoms have the same number of protons, meaning that they are likely isotopes of the same element.

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PCR stands for Polymerase Chain Reaction. It is a laboratory technique for amplification of small quantities of DNA.

The method is frequently used to generate millions or billions of copies of specific DNA sequences, making them easier to study and evaluate. It works by first separating double-stranded DNA into single strands, then employing a heat-stable enzyme called Taq polymerase to synthesis new DNA strands from the original template strands. The process is subsequently repeated several times to make an exponentially greater number of DNA copies. The generated DNA copies can be utilised for genetic testing, forensic investigation, and disease diagnosis, among other things.

PCR has transformed molecular biology by allowing researchers to investigate minuscule amounts of DNA that would otherwise be undetected. PCR allows researchers to study genetic mutations, track disease spread, and evaluate ancient DNA samples by amplifying DNA.

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The first student was knowledgeable about thermodynamics, he would most likely to do the experiment with more accuracy so that there is no error while performing the calorimetry experiment.

Thermodynamics is defined as a field of physics concerned with heat, work, and temperature and its relationships to energy, radiation, and the physical characteristics of matter.

There are basically three system of thermodynamic.

Calorimeter is defined as a device for measuring heat generated during a mechanical, electrical, or chemical reaction and estimating material heat capacity.

Thus, the first student was knowledgeable about thermodynamics, he would most likely to do the experiment with more accuracy so that there is no error while performing the calorimetry experiment.

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The IUPAC nomenclature is based on a systematic approach that involves identifying and prioritizing functional groups, substituents, and other structural features of the compound. The names of the given compounds are:

Specific priority rules are used to determine the parent chain (main carbon backbone) in organic compounds, the selection of functional groups, and the numbering of carbon atoms. Prefixes and suffixes are employed to indicate substituents, functional groups, and other structural elements present in the compound.

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Answer:

true

Explanation:

it always an enginering

Answer:

It is true, selective breeding is a type of genetic engineering

Explanation:

In artificial selection, scientists breed only individuals that have desirable traits. Through selective breeding, scientists are able to change the traits in the population. Evolution has occurred.

Given what we know, we can confirm that a general (all-inclusive) term for organic molecules that have the same molecular formula, but that differ in their structure or in the spatial arrangement of their atoms is isomers.

Therefore, we can confirm that the general (all-inclusive) term for organic molecules that have the same molecular formula, but that differ in their structure or in the spatial arrangement of their atoms is isomers.

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Answer:

Explanation:

-"If he wanted to keep 'em after he was dead, a wicked old screw," pursued the woman, "why wasn’t he natural in his lifetime? If he had been, he'd have had somebody to look after him when he was struck with Death, instead of lying gasping out his last there, alone by himself."

This is showing that if he hadn't be so selfish and righteous, then he would not have been alone to die without anyone there to help or comfort him.  In the line, "why wasn't he natural in his life?", is asking why he wasn't a nice person.  Why didn't he help others.  If he had helped others, he would not have been so alone.A story set during a major battle, as both have a sudden rush of events.

Answer:

Explanations:

Given the following electronegativity of three elements as:

Answer:

0.001mol

Explanation:

volume (NaOH) =25cm³ =0.025dm³

molar volume = 22.4dm³

n = V = 0.025 = 0.001mol

Vm 22.4

The equation \(Na_2CO_2. 10H_{12}O + H_2SO_2 = > Na_{2} SO_{2} + CO_2 + H_2O\)  can be determined as the reaction between sodium carbonate decahydrate and sulfurous acid

In this chemical equation, sulfuric acid (\(H2SO3\)) and sodium carbonate decahydrate (\(Na_2CO_3 10H_2O\)) react to form sodium sulfite (\(Na_2SO_3\)), carbon dioxide (\(CO_2\)), and water (\(H_2O\)). While sulfurous acid is created when sulfur dioxide is dissolved in water, sodium carbonate decahydrate is a hydrated form of sodium carbonate.

The sodium carbonate decahydrate reacts with sulfuric acid during the reaction, producing sodium sulfite, carbon dioxide, and water as byproducts. A salt called sodium sulfite (\(Na_2SO_3\)) is frequently employed in industrial settings as a preservative and reducing agent. Water (\(H_2O\)) is produced as a byproduct of the reaction along with the gas carbon dioxide (\(CO_2\)).

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1/4  temperature must give Mass of nitrogen at 0°c heated so that both it volume and pressure will be double.​

To double both the volume and pressure of a given mass of nitrogen at 0°C, we can utilize the combined gas law, which relates the initial and final states of a gas. The combined gas law is expressed as:

(P1 * V1) / T1 = (P2 * V2) / T2

Where P1 and P2 are the initial and final pressures, V1 and V2 are the initial and final volumes, and T1 and T2 are the initial and final temperatures.

Since we want to double both the volume and pressure, we can set P2 = 2P1 and V2 = 2V1. Plugging these values into the combined gas law equation, we get:

(2P1 * 2V1) / T1 = P1 * V1 / T2

Simplifying the equation, we find:

4P1V1 = P1V1 / T2

Cancelling out the common terms, we have:

4 = 1 / T2

Rearranging the equation, we find:

T2 = 1 / 4

Therefore, to double both the volume and pressure of the given mass of nitrogen at 0°C, it must be heated to a temperature of 1/4 or 0.25 times its initial temperature.

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Therefore, the value of x at equilibrium is approximately 1.24.

Let us rewrite the expression K = c_a^2c_bC_c as a function of x.

K = ((c_a0 − 2x) / c_a0)^2((c_b0 − x) / c_b0)(c_c0 + x) / c_c0
K = 0.016
c_a0 = 42
c_b0 = 28
c_c0 = 4
We can solve for x using a graphical method. We can use a spreadsheet software program, such as Microsoft Excel, to plot the function K as a function of x.

The value of x for which the function K is equal to the constant value of 0.016 represents the value of x at equilibrium.

In this way, we can determine the value of x graphically.

A graph of the function K as a function of x is shown below.
graph

We can see that the function K is equal to the constant value of 0.016 at two points on the graph.

The value of x for which K is equal to 0.016 is approximately x = 1.24 and x = 2.22.

However, we can see from the graph that the value of x that represents equilibrium is approximately x = 1.24.

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The molarity of a solution is the concentration of a substance in solution, expressed as the number of moles of solute per litre of solution.

Molarity = no of moles ÷ volume

According to this question, we are given three concentrations of NaCl solution. First, we find the no of moles of each as follows:

Next, we find the mass of each mole given the molar mass of NaCl is 58.5g/mol.

Therefore, how to prepare these solutions is as described above.

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Answer:

B - To increase the rate of the reaction

Explanation:

Catalysts speed up the reaction without being reactants or products, so aren't used up in the reaction.

Answer:

friction

Explanation:

Answer:

ammonium chloride

Explanation:

Because NH is ammonium and Cl is chlorine

There must have been 0.10mol of \(C_{2} H_{2} O\) in the container at the beginning.

 \(C_{2} H_{2} O\) + \(2O_{2}\) = \(2CO_{2}\) + \(H_{2} O\)

The above reaction makes it quite evident that 1 mol of \(C_{2} H_{2} O\) combines to create 2 mol of \(CO_{2}\) and \(O_{2}\) is given in excess that \(C_{2} H_{2} O\) alone controls a product's formation. Therefore, here, O is an excess reactant and \(C_{2} H_{2} O\) is a limiting reactant.

It takes 6 times as much \(C_{2} H_{2} O\) to produce 1 mol of \(CO_{2}\) from 0.05 mol of \(C_{2} H_{2} O\).

Now, 0.6 divided by 6 mol of reactant is required for 0.60 moles of \(CO_{2}\)to produce, which translates to

moles of \(C_{2} H_{2} O\) = 0.6/6 = 0.1 mol .

Therefore, \(C_{2} H_{2} O\) must have been present in the container in an initial concentration of 0.10mol.

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