Use Equations a and b to determine AH for the following reaction.
2CO(g) + 2NO(g) → 2CO₂(g) + N₂(g) AH = ?
a. 2CO(g) + O₂(g) → 2CO₂(g) AH = -566.0 kJ
b. N₂(g) + O₂(g) → 2NO(g) AH = -180.6 kJ

A liquid substance that could be used in the laboratory for dissolving dry mortar on floor tiles is vinegar; (i) removing KMnO₄, stains is sodium metabisulfite solution; drying acid anhydrides is concentrated sulfuric acid.

Solvents are substances usually liquids, but may also be gases or solids that dissolve other substances known as solutes.

Solvents are usually used as cleansing agents.

One possible liquid substance that could be used for dissolving dry mortar on floor tiles is a mild acid solution, such as diluted hydrochloric acid or vinegar.

KMnO₄ stains are often difficult to remove, but one substance that can be used is sodium metabisulfite (Na₂S₂O₅) solution. Sodium metabisulfite acts as a reducing agent and can effectively neutralize and remove KMnO₄ stains.

Concentrated sulfuric acid is commonly used in the laboratory as a drying agent. It has a strong affinity for water and can efficiently absorb moisture, including water present in acid anhydrides.

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Answer:

Work: 392400 J Power developer: 19620

Answer:

Please put question in!

Explanation:

Answer:

the correct answers are A,D,E, and G

Explanation:

CuCl(s), a solid byproduct of the reaction between Cu(s) and CuCl2(aq), is produced. This reaction is exothermic, meaning it emits heat energy to the surroundings. A critical step in the crystallisation process is cooling the solution after the reaction is complete.

For example, copper(I) chloride disproportionates thus:2CuCl → Cu+CuCl2The reaction involves oxidation of one molecule CuI → CuII+eand reduction of the other CuI+e → CuThe reaction of halogens with hydroxide ions is another example of a disproportionation reaction, for example Cl2(g)+2OH−(aq) ⇌ Cl−(aq)+ClO−(aq)+H2O(l)

Copper (II) chloride is also known as cupric chloride. It is also an inorganic salt. This salt is also utilised as a catalyst during chemical synthesis. For the blue/green.

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Answer:

Potassium chloride.

The chemical name for the compound CH3CH₂CH₂CH3 is butane.

Alkanes are any acyclic saturated hydrocarbon with a carbon to carbon single bond e.g. methane, ethane etc.

Alkanes have a general molecular formula of CnH2n+2. The number of carbon atoms determines the name of the alkane member.

According to this question, a chemical compound with the molecular formula; CH3CH₂CH₂CH3 is given. This compound posseses 4 carbon atoms and 10 hydrogen atoms, hence, is butane.

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Because of the electronegativity difference between the hydrogen and nitrogen atoms, 0.9, ammonia is a covalent molecule. Nitrogen and hydrogen atoms share electrons to create a single covalent link, which results in the production of the covalent NH3 molecule.

Ammonia contains both nitrogen and hydrogen, both of which are nonmetals. As a result, the nitrogen forms three covalent connections with the three hydrogen atoms present.

Because of the difference in electronegativity between nitrogen and hydrogen, ammonia is covalent. Nitrogen has an atomic number of 7, while hydrogen has an atomic number of 1.

If we look at nitrogen and hydrogen separately, we can see that nitrogen contains two electrons in the first shell and five electrons in the second shell.

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\(K_{sp}\) of the compound is found to be  5.04 ×\(10^{-10}\).

Solubility :Solubility can be define as the amount of a substance that dissolves or mixes in a given amount of solvent at specific conditions.

Solubility equilibrium

Ksp = \([A^{+} ]^{a}\) \([B^{-} ]^{b}\)

Ksp = solubility product constant

A+ = cation in an aquious solution

B- = anion in an aqueous solution

a, b = relative concentrations of a and b

Given,

Solubility = s = 3.60 × \(10^{-2}\) g/L

molar mass = 288 g/ mol

∴ s= 3.60 × \(10^{-2}\) g/L ÷ 288 g/ mol = 1.25 ×\(10^{-4}\) mol/ L

Reaction:

MX3 ⇄ M + 3X

           s       3s

\(K_{sp}\) =[ \(M^{+3}\)] [ \(X^{-1}\)\(]^{3}\) = solubility product

∴ \(K_{sp}\) =\([s]^{} [3s]^{3}\)

∴ \(K_{sp}\) = 3 \(s^{4}\)

∴ \(K_{sp}\) = 3 × (3.60 × \(10^{-2}\) \()^{4}\)

∴ \(K_{sp}\) = 503.8848 ×\(10^{-8}\)  = 5.04 ×\(10^{-10}\)

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Based on the given reactions, the compounds are as follows:

A: The specific product formed from the reaction between prop-1-yne and either 2HBr or H2O2.

B: The product formed when compound A reacts with 2H2O.

C: The product formed when compound B reacts with K2CO3(aq).

D: The product formed from the heat-induced reaction of compound C.

E: The product formed when compound D reacts with HBr.

Based on the given reactions, let's analyze the compounds involved:

Reaction 1: prop-1-yne + 2HBr/H2O2 = A

The reactant prop-1-yne reacts with either 2HBr or H2O2 to form compound A. The specific product formed will depend on the reaction conditions.

Reaction 2: A + 2H2O = B

Compound A reacts with 2H2O (water) to form compound B.

Reaction 3: B + K2CO3(aq) = C

Compound B reacts with K2CO3(aq) (potassium carbonate dissolved in water) to form compound C.

Reaction 4: C + heat = D

Compound C undergoes a heat-induced reaction to form compound D.

Reaction 5: D + HBr = E

Compound D reacts with HBr (hydrobromic acid) to form compound E.

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An airplane flew 3043 km from Houston to Seattle in 5.5 hours. What was the average speed, in m/s rounded to the nearest hundredth, of the airplane from Houston to Seattle?

The answer is 553

Answer:

553

Explanation:i did this question today and it was right!

Answer:Many nocturnal animals have a mirror-like layer, called the tapetum, behind the retina, which helps them make the most of small amounts of light.

Explanation:

Given what we know about light interactions, we can confirm that the shadow of the girl on the stage will be seen along the line opposite to the position of the spotlight.

Therefore, given that shadows are the absence of light on the floor caused by an object blocking the source of the light from reaching that area, we can confirm that as with any shadow, it will appear opposite from the position of the source of light.

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Answer:

arc welder involves use of plasma in technology

The device involves the use of plasma in technology is "arc welder"

The 4th phase of matter, after solid, liquid, as well as gas, often been referred to as plasma. Inside a particular substance that is solid, liquid, or even gaseous, the electrons typically stick with almost the unique atomic nucleus.

Using electricity to generate sufficient heat to dissolve metal as well as then allowing the melted metals to cool, arc welding would be a technique for joining metals together.

Arc welding employs the plasma technology principle because the gas would be ionized.

Therefore, the correct answer will be option (a).

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See Your Question is incomplete So I am mentioning steps only to solve it.

In order to find the Final temperature we use thermodynamics

\(\\ \sf\longmapsto Q=mc\Delta T\)

Where

\(\\ \sf\longmapsto Q=Heat\)

\(\\ \sf\longmapsto m=Mass\)

\(\\ \sf\longmapsto c=Specific\:Heat\:Capacity\)

\(\\ \sf\longmapsto \Delta T=T_f-T_i\)

So,

The balanced chemical reaction for this neutralization reaction (The first one) is:

So,

We need to first determine the number of moles of HNO3 from its volume and molarity. Then convert it to moles of NaOH using stoichiometry. Finally, use the calculated moles of NaOH and its molarity (0.100 M) to figure out the volume needed.

To determine the number of moles of HNO3, we could use the formula for molarity:

Where n is the number of moles of the solute (In this case, HNO3), and V is the volume of the solution. First, convert 20.0mL of HNO3 to L:

Now,

Moles of NaOH:

Using the stoichiometry of the reaction, we got that:

Finally, using the molarity of NaOH:

If we pass this to mL, we got:

0.00252L NaOH = 252mL.

Therefore, 252 mL of NaOH are required to neutralize the solution.

Answer:

Chemical bonding is the process by which atoms are held together to form molecules. The bond between atoms is created by the sharing of electrons. The electrons are attracted to the nucleus of the atoms, which creates a force that holds the atoms together.

Answer:

evaporation.

evaporation is the process by which water changes from liquid to a gas or vapor.

Answer:

0.001 mol/dm^3.

Explanation:

The pH of a solution is defined as the negative base-10 logarithm of the concentration of hydrogen ions (H+) in moles per liter (M).

The pH of 3 moldm^-3 means the concentration of hydrogen ions in the solution is:

[H+] = 10^(-pH) mol/L

[H+] = 10^(-3) mol/dm^3

[H+] = 0.001 mol/dm^3

Therefore, the concentration of H+ in pH 3 moldm^-3 is 0.001 mol/dm^3.

Answer:

Balls

Explanation:

Cuz

In order to test for ammonia, a moist red litmus paper should be held over the test tube containing the ammonia.  Option 3.

Ammonia is a substance that is alkaline in nature. All alkaline substances are able to turn red litmus paper to blue. This is in opposition to acidic substances that turn blue litmus paper to red.

Thus, the first test that can be used to determine if a substance is ammonia would be to hold a moist red litmus paper over the test tube containing the suspected substance.

Since ammonia is gas at room temperature, the substance suspected to be ammonia will diffuse from the test tube to turn the moist red litmus paper to blue.

Other methods to test for ammonia include passing a test tube containing hydrochloric acid over the test tube containing the substance. A white fume of ammonium chloride will confirm the presence of ammonia.

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Answer:

yes? is there a question...

Explanation:

Answer:

24 hours

Explanation:

Earth spins on its axis once in every 24-hour day. At Earth's equator, the speed of Earth's spin is about 1,000 miles per hour (1,600 km per hour).

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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For an electron as a particle, E = \(1/2mv^2\)

For an electron as a particle, the energy E can be described using the equation:

E =  \(1/2mv^2\)

where

This equation represents the kinetic energy of the electron, which is the E is the energy

energy associated with its motion.

This equation assumes classical mechanics and does not take into account relativistic effects that become significant at high speeds close to the speed of light.

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Answer:

A prokaryotic cell is shown in the image

Explanation:

Prokaryotic cells are the most basic types. Since they are basic, they don't have a nucleus. All eukaryotic cells have it but prokaryotic cells don't have it. A nucleus contains organelles such as a mitochondria which the diagram doesn't show as well. Thus a prokaryotic cell is shown in the image.

Answer:

20 + CIPb

Explanation:

Use the commutateive proptery to reoder the terms

Answer:

PB(OH)2+ 2HCl --> 2H2O + PbCl2

Potash alum, represented by the chemical formula KAl(SO4)2·12H2O, is a double salt because it consists of two different salts, potassium sulfate (K2SO4) and aluminum sulfate (Al2(SO4)3), combined together. It forms a unique crystalline structure with 12 water molecules incorporated in its composition.

Potash alum is a type of alum that is commonly used in dyeing and water purification applications. The chemical formula for alum is KAl(SO4)2·12H2O.

The term "double salt" refers to the fact that the compound is made up of two different types of ions that are combined together.
In the case of potash alum, the two different types of ions are potassium ions (K+) and aluminum ions (Al3+). These two ions are combined together in a 1:1 ratio to form a complex ion, KAl(SO4)2, which is then combined with 12 water molecules to form the final compound, KAl(SO4)2·12H2O.
The term "double salt" is used to describe this type of compound because it contains two different types of cations (positive ions) that are combined together to form a single crystal lattice structure.

The two different cations are held together by ionic bonds, which are relatively strong and help to give the compound its characteristic properties.
Potash alum is a particularly useful compound because it has a number of important properties that make it useful in a variety of applications.

For example, it is highly soluble in water, which makes it a good choice for use in water purification applications.

It is also relatively stable and non-toxic, which makes it safe to use in a variety of different settings.

Finally, it has a number of useful physical properties, such as its ability to form crystals that are highly reflective and have a characteristic octahedral shape.

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Answer:

V₂ = 3.6 L

Explanation:

Given data:

Initial volume = 4.0 L

Initial temperature = 30.0°C

Final volume = ?

Final temperature = 0.0°C

Solution:

Initial temperature = 30.0°C (30+273=  303 K)

Final temperature = 0.0°C (0+273=  273 K)

The given problem will be solve through the Charles Law.

According to this law, The volume of given amount of a gas is directly proportional to its temperature at constant number of moles and pressure.

Mathematical expression:

V₁/T₁ = V₂/T₂

V₁ = Initial volume

T₁ = Initial temperature

V₂ = Final volume  

T₂ = Final temperature

Now we will put the values in formula.

V₁/T₁ = V₂/T₂

V₂ = V₁T₂/T₁  

V₂ = 4.0 L × 273 K / 303 k

V₂ = 1092 L.K / 303 K

V₂ = 3.6 L

The expected observations for the chemical reaction involving lead nitrate and potassium iodide are as follows as per theory.

Before the reaction, you'd have two separate solutions:

Lead Nitrate solution: This is typically a clear, colorless solution.

Potassium Iodide solution: This is also usually a clear, colorless solution.

REACTION OBSERVATIONS:

As soon as you combine these two solutions, a chemical response takes place, resulting in the almost instantaneous development of a yellow precipitate. Lead iodide is a substance that cannot be dissolved in water.

FINAL APPEARANCE:

The final mixture would have a yellow precipitate (lead iodide) suspended in the solution.

The reaction leads to the formation of lead iodide, a substance with distinctive properties, suggesting a chemical change. The presence of this novel compound is indicated by the yellow hue of the precipitate.

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