How many liters of co2 gas can be obtained from 45. 0 g of caco3?.

When sodium thiosulfate (Na₂S₂O₃) is introduced to a solution containing silver bromide (AgBr), the silver ions (Ag⁺) in the solution react with the thiosulfate ions (S₂O₃²⁻) from the sodium thiosulfate, resulting in the formation of complex ions. These complex ions consist of a metal ion, which in this case is Ag⁺, and one or more ligands, in this case, the thiosulfate ions.

This reaction occurs because the thiosulfate ions have a high affinity for the silver ions due to their ability to coordinate with the metal ion, forming a stable complex. Once the complex ion is formed, it remains in solution and does not precipitate out as a solid.

Therefore, all the silver ions in solution will form complex ions when sodium thiosulfate is added to a solution of silver bromide, leading to the formation of a clear colorless solution. This reaction is often used in photography to fix the image by removing the unexposed silver bromide from the photographic film.

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Obtaining a National Senior Certificate is important for various reasons.

Firstly, having a National Senior Certificate proves that an individual has successfully completed their secondary education, which opens up opportunities for further studies or employment.

Secondly, it provides a sense of accomplishment and boosts confidence in oneself. Thirdly, it serves as a requirement for many job positions and may result in higher salaries. Lastly, it sets a foundation for future success and personal growth.

However, transitioning to tertiary education means adapting to various changes. Firstly, students will have more independence and will be responsible for their own time management, which requires good organizational skills.

Secondly, lectures and assignments are more challenging and require more critical thinking.

Thirdly, there is a wider range of subjects to choose from, which may require students to adjust to new learning styles. Lastly, living away from home may lead to homesickness and social pressures, making it important to maintain a support system.

Overall, obtaining a National Senior Certificate is just the beginning of a journey towards success, and adapting to these changes can lead to a successful tertiary education experience.

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Iodine ions are oxidized to form iodine when the chlorine gas is bubbled in the solution of potassium iodide.

When chlorine gas is bubbled into a solution of potassium iodide, some amount of the iodide ions are oxidized and changed into iodine which leads to the formation of beautiful violet color of iodine. This colour can be seen as the iodine dissolves in the carbon tetrachloride layer.

While on the other hand, when the high concentration of chlorine is bubbled into the solution of potassium iodide, the iodine reacts and formed iodine monochloride which is ruby red so we can conclude that iodine ions are oxidized to form iodine when the chlorine gas is bubbled in the solution of potassium iodide.

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Answer:

latent heat, also called the heat of vaporization, is the amount of energy necessary to change a liquid to a vapour at constant temperature and pressure. The energy required to melt a solid to a liquid is called the heat of fusion, and the heat of sublimation is the energy....................

Explanation:

To calculate the percent yield, we need to compare the actual yield to the theoretical yield. The theoretical yield is the amount of product that would be obtained if the reaction went to completion based on the stoichiometry of the balanced equation.

First, let's determine the molar mass of CaCO3 (limestone) and CaO (quicklime):

- Molar mass of CaCO3 = 40.08 g/mol (molar mass of Ca) + 12.01 g/mol (molar mass of C) + (3 * 16.00 g/mol) (molar mass of O) = 100.09 g/mol

- Molar mass of CaO = 40.08 g/mol (molar mass of Ca) + 16.00 g/mol (molar mass of O) = 56.08 g/mol

Next, we can calculate the theoretical yield of CaO:

The molar ratio between CaCO3 and CaO is 1:1 according to the balanced equation. Therefore, the mass of CaO produced is the same as the mass of CaCO3 used.

The theoretical yield of CaO is 3.3 × 10^3 g.

Now we can calculate the percent yield:

Percent Yield = (Actual Yield / Theoretical Yield) * 100

Percent Yield = (1 × 10^3 g / 3.3 × 10^3 g) * 100

Percent Yield = 30.30%

Therefore, the percent yield of CaO in this reaction is 30.30%.

The first solution provided by meguelratatouille came close to the correct answer, but erred in assuming that equal moles implies equal mass. The following discussion corrects this mistake.

To determine the percent yield, we must compare the actual yield to the theoretical yield.

Theoretical Yield

From the balanced chemical equation we have:

CaCO3(s) --> CaO(s) + CO2(g)

It is necessary to know the molar mass of CaCO3 and CaO to determine the amount of CaO produced from a given amount of CaCO3:

Molar mass CaCO3 = 100.09 g/mol

Molar mass CaO = 56.08 g/mol

Then, to find the total mass of CaO produced by 3.3 x 10^3 g of CaCO3 reactant, we calculate:

3.3 x 10^3 g CaCO3  
x 1 mol CaCO3 / (100.09 g/mol CaCO3)
x 1 mol CaO / (1 mol CaCO3)
x 56.08 g CaO / (1 mol CaO)
-----------------------------------
1848 g CaO

which we report as 1.8 x 10^3 g CaO after applying significant figures.

Actual Yield

Finally, the percent yield is given by dividing the actual yield by the theoretical yield we just computed:

(1 x 10^3 g) / (1.8 x 10^3 g) x 100% = 55.6% = 56%

Answer:The yellow crystalline substance is a compound. The green gas and red powder are elements.

Explanation

Elements and compounds are considered pure substances. Elements are made up of a single type of atom while compounds are composed of two or more elements. One example of a compound is the table salt (NaCl) which is made up of one atom of sodium and one atom of chlorine. The elements in the compound are combined chemically and there is a definite ratio of these elements. They are formed by a chemical reaction where chemical bonds are formed. Furthermore, the components of the compound can be separated through several means such as extraction, distillation, etc. The process of heating the yellow crystalline substance resulted in the separation of its components namely, the green gas and red powder.

Answer:

CaCO3 + 2HCl ---> CaCl2 + H2O + CO2

Explanation:

The reaction between solid calcium carbonate and a mineral acid such as aqueous HCl is a neutralization reaction and occurs with the evolution of CO2 gas.

The balanced equation is given below

CaCO3 + 2HCl ---> CaCl2 + H20 + CO2

The product CaCl2 is water soluble which accounts for why the stain is removed, while CO2 gas escapes away from the reaction surface.

Answer:

CaCO3(s) + 2HCl(aq) -------> CaCl2(aq) + 2CO2(g) + H2O(l)

Explanation:

CaCO3(s) + 2HCl(aq) -------> CaCl2(aq) + 2CO2(g) + H2O(l)

When an acid reacts with a metal carbonate a salt, carbon dioxide and water are formed. Hard water usually contain Ca^2+ in the form of Ca(HCO3)2. Minor heating causes CaCO3(calcium carbonate) to deposit on surfaces through which the hard water passes.

Calcium carbonate reacts with acids to produce a calcium salt, water and carbon dioxide: Calcium carbonate + Hydrochloric acid → Calcium chloride + Water + Carbon dioxide. The carbonate radical breaks up into carbon dioxide and oxygen; the oxygen binds with the acid's hydrogen ions to make water; and a solution of calcium chloride remains.

The isomer that cannot form an H-bonding interaction with another identical molecule, but can do so with a water molecule, is the primary amine isomer (C3H9N).

The primary amine isomer (C3H9N) has the following structure: H3C-CH2-CH2-NH2.This isomer cannot form H-bonding interactions with another identical molecule because it lacks a hydrogen atom bonded to the nitrogen atom. In order for H-bonding to occur between two molecules, there must be a hydrogen atom bonded to an electronegative atom (such as nitrogen, oxygen, or fluorine) and a lone pair of electrons on the electronegative atom.

In the case of the primary amine isomer, there is only one hydrogen atom bonded to the nitrogen atom, and it is already involved in forming an H-bond with a water molecule.However, the primary amine isomer can form an H-bonding interaction with a water molecule. The lone pair of electrons on the nitrogen atom can act as a hydrogen bond acceptor, while the hydrogen atom bonded to the nitrogen can act as a hydrogen bond donor. This interaction can occur between the lone pair of electrons on the oxygen atom of water and the hydrogen atom bonded to the nitrogen of the primary amine isomer.

In summary, the primary amine isomer (C3H9N) cannot form an H-bonding interaction with another identical molecule due to the lack of a hydrogen atom bonded to the nitrogen. However, it can form an H-bonding interaction with a water molecule.

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Answer:

whole milk ,table salt , maple syrup

Answer:

d

Explanation:

A) Out of the given options, Pyruvate is the compound that is not a component of the citric acid cycle.

The citric acid cycle, also known as the Krebs cycle or the tricarboxylic acid (TCA) cycle, is a central metabolic pathway that occurs in the mitochondria of cells. It is responsible for the oxidation of acetyl-CoA derived from various fuel sources, generating energy in the form of ATP and producing NADH and FADH2.

Pyruvate, which is a product of glycolysis, serves as the starting point for the citric acid cycle. It enters the cycle by being converted into acetyl-CoA through a series of enzymatic reactions.

On the other hand, the compounds α-Ketoglutarate, Succinate, and Malate are all intermediates of the citric acid cycle. They are involved in various steps of the cycle, participating in the generation and transfer of energy-rich electrons and the production of ATP and reduced coenzymes.

Therefore, out of the given options, Pyruvate is the compound that is not a component of the citric acid cycle.

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Answer:

1%  A

Explanation:

Answer:

The primary reason why cars in Mombasa rust faster than those in Nairobi is because the humidity ( water evaporation rate) in Mombasa is higher than that of Nairobi. Since Mombasa has higher temperatures the rate of water evaporation is higher which results into a higer humidity.

Explanation:

This is why cars in Mombasa rust faster than those in Nairobi

1. The name of the fertilizer I found at my local gardening store is Miracle-Gro All Purpose Plant Food.

2. Form (liquid or solid): Soluble powder.

3. Grade: 24-8-16

4. Weight of container or bag: 1.5 lbs. You may see the table on the attachment.

Miracle-Gro All Purpose Plant Food is a popular brand of fertilizer that can be found in most gardening stores and nurseries.  The form of Miracle-Gro All Purpose Plant Food is a soluble powder that can be dissolved in water.

The grade of this fertilizer is 24-8-16, which means it contains 24% nitrogen, 8% phosphate, and 16% potash (also known as potassium). The weight of the container or bag of Miracle-Gro All Purpose Plant Food is 1.5 lbs, which is the amount of fertilizer that is contained in the package.

The table shows the actual amounts of nitrogen, phosphate, potash, oxygen, and zinc (sometimes abbreviated as Za) in the fertilizer, based on the given weight of the fertilizer. This information is important for determining how much fertilizer to apply to plants and for maintaining proper plant nutrition. Nitrogen is an important component for promoting leaf growth, while phosphorus is important for root development and flowering. Potassium helps to promote overall plant health and resistance to disease.

Oxygen is not a component of fertilizer but is listed here because it is sometimes used as a filler in fertilizers to increase the volume. Zinc is also not a major component of most fertilizers but may be present in small amounts to help promote plant growth.

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The molar concentration of HCl in the original solution is 0.19

The balanced chemical equation for the reaction must be our starting point because it will provide us with the reactants' mole ratios and allow us to answer this question.

* NaOH + HCl --> NaCl + H2O

this means:

1 mole NaOH reacts with 1 mole HCl

thus the ratio of NaOH to HCl is 1: 1

Next we've got to calculate the moles of NaOH: (molecular Mass = 40 g/mol)

moles(NaOH) = 3.76g/40

= 0.094 moles

Now we can calculate the concentration of NaOH:

Note: 361mL/1000 = 0.361L

conc(NaOH) = 0.094 moles/0.361L

= 0.26 mol/L

Now the mole ratio of NaOH to HCl is 1:1

But we have used only 0.094 moles so since the ratio of NaOH to HCl is 1:1, it means that 0.094moles of NaOH can only react with 0.094 moles of HCl.

Note: 491mL/1000mL = 0.491L

conc(HCl) = 0.094 moles/0.491L

= 0.19 mol/L

Thus the molar concentration of HCl in the original solution is 0.19

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ionic and polar compounds are highly soluble in water whereas the covalent and organic compounds are highly insoluble in water

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Answer:

1) Zn is a element

2)CuSO4 is an ionic compound

Explanation:

Answer: an element and an ionic compound

Explanation: my mom told me

The 95% margin of error for the mean increase in blood pressure that one would expect for cigarette smokers over the time span indicated by the experiment is ±1.98 (rounded off to two decimal places).

The mean increase in blood pressure that one would expect for cigarette smokers over the time span indicated by the experiment can be estimated by using the formula;μ = x ± z(\(a^{2}\)) * σ/√n

Where;μ is the population mean increase.x is the sample mean increase.z(\(a^{2}\)) is the z-scoreα is the level of significanceσ is the population standard deviationn is the sample size.

Substituting the given values into the formula;μ = 9.1 ± 1.96 * 5.5/√37= 9.1 ± 1.98

The mean increase in blood pressure that one would expect for cigarette smokers over the time span indicated by the experiment lies between 7.12 to 11.08.

Hence, the estimated mean increase is between 7.12 to 11.08 millimeters of mercury.

The 95% margin of error can be calculated using the formula;

Margin of error (E) = z(\(a^{2}\)) * σ/√n

Margin of error (E) = 1.96 * 5.5/√37

Margin of error (E) = 1.98 (approximated to two decimal places).

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Volume of 0.500 M C2H3OH and 0.500 M CH3O-Na that is required to prepare 0.100 L of pH = 5.00 buffer with a buffer strength reaction of 0.100 M = 31.6 mL of 0.500 M C2H3OH and 17.4 mL of 0.500 M CH3O-Na

To calculate the volume of 0.500 M C2H3OH and 0.500 M CH3O-Na required to prepare 0.100 L of pH = 5.00 buffer with a buffer strength of 0.100 M, we need to make use of the Henderson-Hasselbalch equation.Henderson-Hasselbalch equation is given as:  pH = pKa + log ([A-] / [HA])Where, pH is the pH of the buffer solution.

Pka is the negative logarithm of the acid dissociation constant ([H+][A-] / [HA]).[A-] is the concentration of the conjugate base.[HA] is the concentration of the weak acid.Let us calculate the concentration of the weak acid.  From the pH value, we can calculate the [H+].5.00 = 4.75 + log ([A-] / [HA])[A-] / [HA] = antilog (5.00 - 4.75) = antilog (0.25) = 1.78[Molar]Now, the buffer strength is 0.100 M.

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The geometry lets the dipoles cancel out.A molecule can be nonpolar even if the bonds are polar if the polar bonds are arranged symmetrically

Around the central atom, and the geometry of the molecule allows the dipoles to cancel out. This means that the partial positive and partial negative charges in the molecule are distributed evenly, resulting in a molecule with no overall dipole moment. For example, carbon dioxide (CO2) has two polar covalent bonds between carbon and oxygen, but the molecule is linear and symmetrical, which allows the dipoles to cancel out, resulting in a nonpolar molecule.

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The artistry in the scene of Wiesel and his father approaching the inferno is achieved by the use of literary techniques such as pacing and sentence structure.

The pace of the scene is quickened by the use of short sentence fragments, which creates a sense of urgency and intensity. This helps to convey the chaos and confusion of the situation, and the reader is drawn into the scene, feeling as though they are there with Wiesel and his father.

The use of sentence fragments also contributes to the overall sense of disorientation and discomfort, as it breaks away from traditional sentence structure and grammar. This contributes to the vividness of the scene and makes it more memorable for the reader.

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There are 490 gallons of a  ​70 ​% antifreeze solution must be mixed with gallons of ​% antifreeze to get a mixture that is 30 ​% ​antifreeze.

An equation can be created using the relationship between each antifreeze proportion.

The required amount of 90% antifreeze is 490 gallons.

The query is unfinished. I will thus address the query using the following information.

Antifreeze available = 70 gallons at 10%

Gallons of 90% antifreeze equal x.

Total = x + 70 to obtain an 80% solution after combining the solution.

The formula is therefore written as follows: 

(x+70) x 80% = 70x 10% + x 90%

assemble similar terms

0.9x +0.8x = 56-7

0.1 x= 49

Divide by 0.1 and get 490.

Your question is incomplete but most probably your full question was

How many gallons of a ​70% antifreeze solution must be mixed with gallons of 90​% antifreeze to get a mixture that is 30​% ​antifreeze? Use the​ six-step method.

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Answer:

12.56 moles

Explanation:

This means that the mass of the nucleus of Ag109 is 0.0009 amu less than what we would expect based on the masses of its individual protons and neutrons. This difference is due to the energy released during the formation of the nucleus, which is called the binding energy. The mass defect can be used to calculate the binding energy of the nucleus, which is a measure of its stability.

When we talk about the mass of an atom, we are referring to its nuclear mass, which is the combined mass of its protons and neutrons in the nucleus. The mass of an atom is usually measured in atomic mass units (amu). In the case of Ag109, its nuclear mass is experimentally determined to be 108.9048 amu.

To calculate the mass defect, we need to know the theoretical mass of the nucleus, which can be calculated by adding up the masses of the protons and neutrons in the nucleus. For Ag109, there are 47 protons and 62 neutrons, so the theoretical mass of the nucleus is:

(47 x 1.00728 amu) + (62 x 1.00867 amu) = 108.9057 amu

The mass defect is the difference between the theoretical mass and the experimental mass:

δ = 108.9057 amu - 108.9048 amu = 0.0009 amu

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Answer:

a) Van der Waals intermolecular forces

b) bonded

c) one pair

d) two pairs

e) three pairs

f) chemical bonds

g) two atoms

h) two or more covalently bonded atoms

Explanation:

(a) Covalent bonds are one type of Van der Waals intermolecular forces that are formed when two atoms share electron(s)

(b) Covalent compounds consists of two bonded atoms

(c) Single covalent bond: are formed when two atoms share one pair of electrons.

(d) Double covalent bond: are formed when two atoms share two pairs of electrons.

(e) Triple covalent bond: are formed when two atoms share three pairs of electrons.

(f) A molecule is a neutral groups of atoms that are held together by chemical bonds.

(g) Diatomic molecule consists of two atoms.

(h) Molecular compound is made of two or more covalently bonded atoms.

The correct option is; H. 2 blue, 3 yellow, and 12 green will be used to make the model of Aluminium Sulphate .

Aluminium sulfate is a salt with the formula Al₂(SO₄)₃.

It is soluble in water and is mainly used as a coagulating agent (promoting particle collision by neutralizing charge) in the purification of drinking water and wastewater treatment plants, and also in paper manufacturing.

Aluminium atoms (Al) = Blue Beads

Oxygen Atoms (O) = Green Beads

Sulfur (S) = Yellow beads

From the compound  Al₂(SO₄)₃ , the number of atoms present are;

Al = 2

S = 3

O = 12

This means the model would contain;

2 Blue beads

12 Green beads

3 Yellow beads

Therefore The correct option is; . 2 blue, 3 yellow, and 12 green.

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Answer:

0.000000000402000 in scientific notation is  4.02000 × 10-10