calcium carbonate is heated

name the;

reactant and the state:

product and the state:

word equation:

balanced formula:

type of reaction:

Thank you if you help

The majority of the lead(II) iodide in the solution precipitates out as a yellow solid flag.

Define lead iodide?

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Answer:

Covalent bonds are formed by the sharing of electrons between two non-metallic atoms. These bonds are typically stronger and more stable than ionic bonds and are found in compounds such as water, hydrogen, and carbon dioxide. Covalent bonds differ from ionic bonds in that they do not involve the transfer of electrons from one atom to another.

Explanation:

To determine the most likely untrue statement, more information about the nature and properties of the samples is required.

Based on the information provided, it is difficult to determine which statement is probably not true without additional context or details about the samples. However, I can explain what each statement means:
a) NOT Sample #2 was darker: This statement suggests that Sample #2 was not darker than Sample #1.
b) NOT Sample #2 had more intense flavors: This statement implies that Sample #2 did not have more intense flavors compared to Sample #1.
c) NOT Sample #1 was less expensive: This statement indicates that Sample #1 was not less expensive than Sample #2.
To determine the most likely untrue statement, more information about the nature and properties of the samples is required.

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The given  statement "Gaseous ammonia reacts with dioxygen gas to produce nitrogen monoxide gas and water" is A. true because This is an example of a chemical reaction called an oxidation-reduction reaction, which is a type of chemical reaction that involves the transfer of electrons between two species.

In this reaction, the oxygen in the dioxygen gas acts as an oxidizing agent, taking electrons from the ammonia. The ammonia in turn acts as a reducing agent, providing electrons to the oxygen. As a result, the ammonia is oxidized, producing nitrogen monoxide and water, which are the products of this reaction.

This reaction can be written as follows: 4NH3 + 5O2 --> 4NO + 6H2O.

The oxidation-reduction reaction between gaseous ammonia and dioxygen gas produces nitrogen monoxide gas and water as products, making the statement  A. true.

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Answer:

d. 1 mole Al₄C₃ and 12 moles H₂O

Explanation:

The coefficients in a balanced chemical equation indicate the number of moles of reactants and products. If a substance does not have a coefficient written in front of it, it is assumed to be 1.

Answer:

3rd image

Explanation:

Answer:

69, 7 ,89,9,88 atomic numbers

Fats or oils are created when the hydroxide group of glycerol combines in a dehydration synthesis process with the carboxyl group of fatty acids.

The building blocks of fat in our bodies and the food we eat are called fatty acids. During digestion, the body transforms lipids into fatty acids so they may be absorbed into the bloodstream. A molecule known as a triglyceride is created when three fatty acid molecules are linked together.

Saturated, monounsaturated, and polyunsaturated fatty acids are all present in dietary fats. Even while meals include all three forms of fatty acids, they are frequently grouped according to the prevalent type.

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The quinoline (C₉H₇N) behaves as Bronsted - Lowry base in water. The net ionic equation is given as C₉H₇N (aq) + H₂O ⇄ C₉H₇NH⁺ (aq) + OH⁻ (aq).

Bronsted-Lowry definition of acids and bases

Bronsted-Lowry acids and bases involves proton transfer during the reaction. When any compound donates a proton in water it is called as a Bronsted-Lowry acid. And the proton donated by the Bronsted-Lowry acid is accepted by the Bronsted-Lowry base.

The net ionic equation of quinoline is given as,

C₉H₇N (aq) + H₂O ⇄ C₉H₇NH⁺ (aq) + OH⁻ (aq)

Thus, from the net ionic equation of quinoline it is clear that quinoline accepts proton hence, it is a Bronsted-Lowry base.

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Answer:

a liquid that is thick and sticky

Explanation:

The gaseous substance that posses the largest molar entropy is C₃H₈. Hence, the correct substance is C₃H₈.

Generally, at the molecular level, the value of the entropy of the distribution of atoms and molecules in a thermodynamic system is defined as a measure of the disorder in the arrangements of its particles.

Basically, the entropy of a substance depends on the amount of substance, the pressure, and the temperature, so it is convenient to describe the entropy of a substance in the terms of Sm°.

Generally, it proven that the degree of disorder of solids is less than liquids and the degree of disorder of liquids is less than gases (solids<liquids<gases). And as  C₃H₈ contains most number of atoms, so it posses the largest molar entropy. Hence, the correct option is B.

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Webb should classify the yellow solid as a nonmetal.

The non-metаls аre elements on the right of the periodic tаble. Non-metаls cаn be gаses, liquids or solids. Non-metаls аre dull in colour, not shiny like metаls. We cаn't hаmmer or shаpe а non-metаl; it will just shаtter if you hit it. Sulphur is аn exаmple of а non-metаl. It's yellow аnd shаtters if you hit it with а hаmmer. Non-metаls don't conduct electricity well: they аre insulаtors. There is one exception: grаphite is а non-metаl which cаn conduct electricity.

Thus, Webb is testing sulphur. Because sulphur is a dull and yellow solid that breaks into powdery pieces when he hits it with a hammer.

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The components of the system are antimony trisulfide used for fuel, ammonium phosphate prevents excessive smoking, potassium chlorine is the key to ignition, it makes the fuel burn. At last, another important component of the system is oxygen, which makes ignition possible. Remember that all combustions need oxygen to happen.

Explanation:

i think it is a polar bond but I am not sure

Answer:

i believe it forms a covalent bind by sharing the electrons, so closest would be Ionic

Answer: Steel wool turns from a gray color to a reddish color after it gets wet and then sits on a counter is a sign of chemical change.

Explanation:

A change that brings change in chemical composition of a substance is called a chemical change.

For example, Steel wool turns from a gray color to a reddish color after it gets wet and then sits on a counter is a chemical change.

This is because steel wool is mostly made up of iron and when iron becomes wet then in the presence of air it gets oxidized and therefore, it gets corroded.

This corrosion appears as reddish color of steel wool and it represents a chemical change has occurred in the steel wool.

Thus, we can conclude that steel wool turns from a gray color to a reddish color after it gets wet and then sits on a counter is a sign of chemical change.

Answer:

27.2 kg

Explanation:

13.6 * 2 L of commercial flask of mercury = 27.2 kg.

Hope this helps! Have a good day! :D

The enthalpy change for the reaction a→ca→c is -5341kJ/mol.  

Hess's law states that the enthalpy change for a reaction at constant pressure is the sum of the enthalpies of formation of the products minus the enthalpies of formation of the reactants. The enthalpy of formation of a substance is the amount of heat required to produce one mole of that substance from its elements in their standard states at constant pressure and temperature.

For part a, we need to find the enthalpy change for the reaction a→bδh= 19kja→bδh= 19kj. To do this, we can use the enthalpies of formation of the products and reactants from their standard states. The standard enthalpy of formation of water is 4 kJ/mol, and the standard enthalpies of formation of oxygen and sulfur are 0 kJ/mol and -47 kJ/mol, respectively. The standard enthalpy of formation of sulfur dioxide is -296 kJ/mol.

Using the equation for Hess's law, we can write:

ΔH = ΣΔHf - ΣΔHr

ΔH = (19kJ/mol - 0 kJ/mol) - (b - a)δh - (53kJ/mol - (b - a)δh)

Simplifying this equation, we get:

ΔH = 19kJ/mol - 0 kJ/mol - (b - a)δh - (53kJ/mol - (b - a)δh)

ΔH = 19kJ/mol - 0 kJ/mol - (b - a)δh - (53kJ/mol - (b - a)δh)

ΔH = 19kJ/mol - 0 kJ/mol - (b - a)δh - (53kJ/mol - (b - a)δh)

ΔH = 19kJ/mol - (b - a)δh - (53kJ/mol - (b - a)δh)

Substituting the values for δh, we get:

ΔH = 19kJ/mol - (b - a)29kJ/mol - (53kJ/mol - (b - a)29kJ/mol)

ΔH = 19kJ/mol - 5343kJ/mol

ΔH = -5341kJ/mol

Therefore, the enthalpy change for the reaction a→ca→c is -5341kJ/mol.  

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Answer:

A. Barium

Explanation:

hope this helps! :)

Answer:

The answer is "\(\bold{90.62 \ g \ C_3H_8}\)".

Explanation:

Write a balanced thermochemical formula for both the combustion with one mole of \(C_3H_8\)

\(C_3H_8\ (g) +5 O_2 \ (g)\longrightarrow 3 CO_2 \ (g) +4H_2O \ (l)\ \ \ \ \ \ \ \ \Delta H_{comb} = -2219 \frac{kj}{mol}\)

Calculating the molar mass of \(C_3H_8\) .  

\(3 (12.0107 \frac{g}{mol}) +8 (1.0079 \frac{g}{mol})= 44.0953 \frac{g}{mol}\)

1) Start with both the energy released.  

2) Just use molar enthalpy of \(C_3H_8\)  as just a balanced equation to transfer kilojoules to birthmarks of \(C_3H_8\) .  

3) It use molarity of \(C_3H_8\)   as a balanced equation to transfer caterpillars of \(C_3H_8\)  to ounces of \(C_3H_8\) .

\(= -4560 \ kJ \ \ \ \ \frac{1 \ mol C_3H_8}{-2219 \ kJ} \ \ \ \ \frac{44.0953 \ g \ C_3H_8}{1 \ mol \ C_3H_8}\\\\ = 90.62 \ g \ C_3H_8\)

Resistance exercise can impact nitrogen balance by promoting an increase in muscle protein synthesis and reducing muscle protein breakdown. This results in a positive nitrogen balance, indicating that the body is retaining more nitrogen than it is excreting.

Resistance exercise stimulates muscle protein synthesis, which is the process of creating new proteins in muscle cells. This increase in protein synthesis requires a positive nitrogen balance, as proteins are composed of amino acids, and nitrogen is an essential component of amino acids. During resistance exercise, the body adapts to the increased demand by enhancing the rate of muscle protein synthesis.

Additionally, resistance exercise also reduces muscle protein breakdown. By engaging in resistance training, the body signals a need to preserve muscle tissue, leading to a decrease in muscle protein breakdown.

The combination of increased muscle protein synthesis and reduced protein breakdown results in a positive nitrogen balance, indicating that the body is retaining more nitrogen than it is losing. This is important for muscle growth and adaptation to resistance training.

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A cell with iron and chromium electrodes in an electrolyte can convert Fe²+ to Fe and Cr to Cr³⁺. The anode is Cr, the cathode is Fe, and the voltage is 0.56 V. The balanced equation is: 2Fe²⁺ + Cr --> 2Fe + Cr³⁺

The cell for this reaction would consist of two half-cells:

Anode: \($\mathrm{Cr \rightarrow Cr^{3+} + 3e^-}$\)

Cathode:\($\text{Fe}^{2+} + 2\text{e}^- \rightarrow \text{Fe}$\)

The overall reaction is:

\(2Fe^{2+} + Cr \rightarrow 2Fe + Cr^{3+}\)

The anode is where oxidation occurs, and the cathode is where reduction occurs. In this case, the anode is the half-cell with the chromium metal, and the cathode is the half-cell with the iron(ii) ion.

To calculate the voltage of the cell, we need to find the standard reduction potentials for each half-reaction and use the equation:

E°cell = E°reduction (cathode) - E°oxidation (anode)

The standard reduction potential for Fe2+ to Fe is -0.44 V, and the standard reduction potential for Cr3+ to Cr is -0.74 V.

E°cell = (-0.44 V) - (-0.74 V) = 0.30 V

So the voltage of the cell is 0.30 V.

The electron flow would be from the anode to the cathode, with electrons leaving the chromium metal and entering the iron(ii) ion to form iron metal.

The anode is the half-cell with the chromium metal, and the cathode is the half-cell with the iron(ii) ion.

The balanced overall equation is:  2Fe²⁺ + Cr --> 2Fe + Cr³⁺

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Answer:300k=3L

             700k=x

cross multiply

300x=2100; x=7L

Explanation:

Answer:

7L

Explanation:

Acetone, (CH3)2CO, has 3 sp3 hybridized carbon atoms and 1 sp2 hybridized oxygen atom, according to VSEPR theory. The carbon atoms are tetrahedral and oxygen atom is trigonal planar in shape.

i) Using VSEPR theory, we can predict the arrangement of electron pairs around the atoms in a molecule. The Lewis structure of acetone shows that the carbon atoms have four electron pairs around them (two from the single bonds and two from the double bond) and the oxygen atom has two electron pairs around it.

The carbon atoms are all sp3 hybridized, and the oxygen atom is sp2 hybridized.

ii) The three carbon atoms in acetone each have four electron pairs around them, which means they are tetrahedral in shape. Therefore, they are all sp3 hybridized. The oxygen atom has two single bonds and one double bond around it, which means it is trigonal planar in shape. Therefore, it is sp2 hybridized.

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Answer:

1x10^-8 M

Explanation:

Since the solution turns blue, it mean the solution is a base.

Now, to know which option is correct, we need to determine the pH of each solution. This is illustrated below:

1. Concentration of Hydrogen ion, [H+] = 1x10^-2 M

pH =..?

pH = - log [H+]

pH = - log 1x10^-2

pH = 2

2. Concentration of Hydrogen ion, [H+] = 5x10-2 M

pH =..?

pH = - log [H+]

pH = - log 5x10^-2

pH = 1.3

3. Concentration of Hydrogen ion, [H+] = 5x10 M

pH =..?

pH = - log [H+]

pH = - log 5x10

pH = - 1.7

4. Concentration of Hydrogen ion, [H+] = 1x10-8 M

pH =..?

pH = - log [H+]

pH = - log 1x10^-8

pH = 8

A pH reading shows if the solution is acidic or basic. A pH reading between 0 and 6 indicates an acidic solution, a pH reading of 7 indicates a neutral solution while a pH reading between 8 and 14 indicates a basic solution.

From the above calculations, the pH reading indicates a basic solution when the hydrogen ion concentration was 1x10^-8 M.

When 3-phenylpropanoic is treated with a catalyst such as NaOH/H₂O, the expected organic product is sodium salt of 3 - phenylpropanoic acid

Carboxylic acids when treated with a base like NaOH or KOH gives carboxylate ion because H⁺ from acid reacts with OH⁻ from base gives H₂0 and salt of sodium carboxylate. NaOH is considered to be an excellent catalyst for the hydride transfer in organic compounds such as aromatic and aliphatic ketones.

The mechanism for the reaction is given below:

In the mechanism, NaOH dissociates as Na⁺ OH⁻ , the H⁺ ion from OH group of 3-phenylpropanoic acid is abstracted by OH- to form a water molecule (H₂O). Thus a  negative charge is created at the terminal O atom of carboxylic group where the Na⁺ ion attacks to form the resultant product i.e sodium salt of 3-phenylpropanoic acid.

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Acetic acid and sodium hydroxide used to make a buffer solution.

What is buffer solution?

buffer solution is a waterproof solvent based solution in  which consists of a mixture of  containing a weak acid and  the conjugate base of the weak acid, or a weak base of the solution and the conjugate acid of the weak base. They resist to a  change in pH upon to the  dilution or upon the addition of small amounts of a  acid/alkali to them. Buffer solution resist of a  change in pH when smallest amounts of a stronger acid or a stronger base are added.

Sol-Acetic acid is a weaker acid and  its conjugate base is the acetate anion. That's why the addition of the strong base, hydroxide, which neutralized half of a  acetic acid created a buffer and  solution because we are having  significant amounts of both acetic acid and its conjugate base, the acetate anion, in the solution.

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Answer:

covalent

Explanation:

Answer:

the answer is 3 :)

Explanation:

The atoms in a metal are arranged in a regular pattern and are closely packed together.

The best pair of tools for Silus to use would be an electronic temperature probe and a computer.

Using an electronic temperature probe allows for accurate and precise temperature measurements, which is important for monitoring the reaction. The electronic temperature probe can quickly and continuously measure the temperature at regular intervals.

Pairing the electronic temperature probe with a computer provides several advantages. Silus can connect the temperature probe to the computer, which allows for real-time data acquisition and logging. The computer can record the temperature measurements at the desired intervals of 0.5 seconds and store the data for further analysis.

Additionally, a computer provides the necessary software and tools for graphing the temperature values over time. Silus can use graphing software or spreadsheet programs to plot the temperature data and create a graph. This graph can then be easily inserted into a text document or saved as an image for presentation or analysis purposes.

Therefore, the best pair of tools for Silus to use would be an electronic temperature probe and a computer.

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Answer: Man Made Resources?

Explanation: Its when humans create their own things.