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Ammonia is often formed by reacting nitrogen and hydrogen gases. How many liters of ammonia gas can be formed from 12.1 L of hydrogen gas at 99.0"C and a pressure of 49.3 Pa?
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The value of Ksp for Ag₂CO₃ in the saturated solution will be 8.39 × 10⁻¹².

A saturated solution is the one in which the maximum amount of solute that a solvent can dissolve in it has been dissolved. If more solute is tried to be dissolved than the crystals of the solute will be present in the solution as they won't dissolve.

According to the solution,

[Ag⁺] = 2.56 × 10⁻⁴ M

In saturated solution,

Ag₂CO₃ + H₂O ⇒ 2Ag⁺ + CO₃²⁻

Ksp = [Ag⁺]² [CO₃²⁻]

[CO₃²⁻] = 1/2  [Ag⁺]

[Ag⁺] = 2.56 × 10⁻⁴ M

Therefore, [CO₃²⁻] = 1.28 × 10⁻⁴ M

Hence, Ksp = (2.56 × 10⁻⁴ M)² × (1.28 × 10⁻⁴ M)

Therefore, Ksp = 8.39 × 10⁻¹²

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Polyp and medusa, the two body forms of cnidarians, frequently coexist throughout the course of a single cnidarian's life cycle.

Cnidarians are most frequently associated with scyphozoans. They can grow to be enormous and have a real medusa stage. The largest known example of this, sometimes known as a jellyfish, may have a bell that is over ten feet in diameter. Scyphozoans live in the medusa stage for the most of their lives, and some species may often lack the polyp stage.

There are two major phyla in the animal kingdom that have radial symmetry: Cnidaria, which includes corals, anemones, and jellyfish, is one of them. Radial symmetry is shown by jellyfish at four locations around their centre.

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Answer:

Conduction is the transfer of thermal energy through direct contact. Convection is the transfer of thermal energy through the movement of a liquid or gas. Radiation is the transfer of thermal energy through thermal emission.

9. In terms of Material Sustainability Attribute HPD gives information about a product's content, any potential health hazards associated with the product, and the safe handling and disposal of the product.

10. In terms of sustainability, VOC gives information about chemicals emitted by building materials and finishes that can cause negative health effects for people and contribute to air pollution.

11. Single attribute product sustainability attributes are assessed for particular issues such as emission of VOCs, thermal performance, and energy performance. Thus, option E. (a, b, c) is correct.

12. International Green Construction Code is developed by ICC (International Code Council) in response: all of the above is the correct answer (Option E).

13. The statement "lumber applies to wood products derived directly from logs through sawing and planning operations with no other manufacturing except cutting to length" is true.

14. The statement "the terms lumber, solid lumber, solid sawn lumber, and sawn lumber are synonymous" is true.

15. Wood is known for its high strength-per-weight ratio as compared to other structural materials. (Option B).

16. The statement "Wood is much stronger by weight than concrete" is false because wood is less strong by weight than concrete.

17. The statement "Concentric annual rings are visible in the vertical section of a tree and provide a good estimation of the age of the tree" is true.

HPD stands for Health Product Declaration. In terms of Material Sustainability Attribute HPD gives information about a product's content, any potential health hazards associated with the product, and the safe handling and disposal of the product. VOC stands for Volatile Organic Compounds. In terms of sustainability, VOC gives information about chemicals emitted by building materials and finishes that can cause negative health effects for people and contribute to air pollution.

International Green Construction Code is developed by ICC (International Code Council) in response to demand and initiatives such as LEED. It is a baseline code as opposed to a multi-tiered rating system. It applies primarily to non-residential buildings. It is newly developed and not yet widely adopted and has some conflicts with the LEED certification process.

Thus, the correct answer is

11. E

12. E

13. True

14. True

15. B

16. False

17. True

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Explanation:

Bottom line: Most asteroids are rocky bodies that lie within the asteroid belt while comets are dirty snowballs from the Oort Cloud, with some objects acting like a hybrid of these two types.

According to Dalton's atomic theory, atoms are indivisible and cannot be created or destroyed in chemical reactions. Therefore, any chemical reaction that violates this principle would not be possible according to Dalton's atomic theory. Therefore, the correct answer is c. reaction 3.

Of the three reactions given:

a. reaction 1: CCI, CH - This reaction does not violate Dalton's atomic theory since the number of atoms on both sides of the reaction is equal, and no atoms are being created or destroyed. Therefore, this reaction is possible according to Dalton's atomic theory.

b. reaction 2: \(N_2 +3H_2\)-> \(2NH_3\) - This reaction does not violate Dalton's atomic theory since the number of atoms on both sides of the reaction is equal, and no atoms are being created or destroyed. Therefore, this reaction is possible according to Dalton's atomic theory.

c. reaction 3: 2H,+ O, 2H,0+ Au - This reaction violates Dalton's atomic theory since it suggests that gold atoms are being created or destroyed during the reaction, which contradicts the principle of the conservation of atoms. Therefore, this reaction is not possible according to Dalton's atomic theory.

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Answer:

C. the substance in which the solute dissolves

Explanation:

There are two terms in this... the solute and the solvent. The way I learned how to remember this is with a little pirate analogy: The loot (stolen treasure) always goes in the vent. So, the soLUTE goes in the solVENT.

A gas under constant pressure will expand when heated.

The temperature is the degree of hotness or coldness of the object.

According to the ideal gas law.

pV= nRT

where, p = pressure. V = volume, n =moles of elements, R =universal gas constant and T =temperature.

When pressure is kept constant, volume is directly proportional to the temperature.

When temperature is increased or an object is heated, the volume also increases i.e expands.

Thus, a gas under constant pressure will expand when heated.

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The statement given about Fluorine atom in an organic molecule is False.

A fluorine atom in an organic molecule typically has seven valence electrons. In a covalent bond, fluorine tends to form one bond by sharing one electron with another atom. Therefore, if a fluorine atom has one single covalent bond attached to it, it would have six valence electrons remaining.

However, the statement claims that the fluorine atom also has four lone-pair electrons attached to it. Lone-pair electrons are non-bonding electrons that are not involved in covalent bonds. According to the statement, four lone-pair electrons are attached to the fluorine atom, in addition to the single covalent bond.

If we consider that the fluorine atom has one single covalent bond and four lone-pair electrons, the total number of valence electrons attached to the fluorine atom would be 6 + 4 = 10. This exceeds the number of valence electrons typically available for a fluorine atom.

Therefore, the statement is false. A fluorine atom in an organic molecule with one single covalent bond would typically have six lone-pair electrons attached to it, not four.

The statement is false. A fluorine atom in an organic molecule with one single covalent bond attached to it typically has six lone-pair electrons, not four.

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The “33 percent more for free” deal is better than the “33 percent off” deal. This is because the “33 percent more for free” deal gives you 13.3 ounces of coffee for $10, while the “33 percent off” deal gives you only 6.7 ounces of coffee for $6.67

For the “33 percent more for free” deal:

10 dollars for 10 ounces of coffee

13.3 ounces of coffee for 10 dollars (33% more)

Price per ounce = 10/13.3 = $0.75 per ounce

For the “33 percent off” deal:

10 dollars for 10 ounces of coffee

6.7 ounces of coffee for $6.67 (33% off)

Price per ounce = 6.67/6.7 = $0.99 per ounce

So, the “33 percent more for free” deal is better than the “33 percent off” deal because you get more coffee for your money.

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Answer:

Facts About Biosphere 1: The Evolution Of Biosphere

Biosphere has evolved.  It started from the non living matter or simple organic compound which created the life. This process is called bioprocess which conducted around 3.5 billion years ago.

Facts about Biosphere 2: the life of earth

It is not easy for the scientists to determine the life of earth.  However, they can estimate it after the discovery of the metasedimentary rocks from Western Greenland. The scientists believed that it was dated back around 3.7 billion years old.

Facts About Biosphere 3: Another Evidence For The Earth’s Life

Evidence was found in Western Australia. The discovery of microbial mat fossils made the scientists estimated that the earth was dated around 3.48 billion years ago.

In this example, the limiting reagent is the alkyl οr aryl halide (RX), as it is present in a lοwer quantity and will be cοmpletely cοnsumed during the reactiοn.

In οrganic chemistry, an alkyl grοup is an alkane missing οne hydrοgen. The term alkyl is intentiοnally unspecific tο include many pοssible substitutiοns. An acyclic alkyl has the general fοrmula οf −CnH₂n+1.

A cyclοalkyl grοup is derived frοm a cyclοalkane by remοval οf a hydrοgen atοm frοm a ring and has the general fοrmula −CnH₂n+1. Typically an alkyl is a part οf a larger mοlecule. In structural fοrmulae, the symbοl R is used tο designate a generic (unspecified) alkyl grοup. The smallest alkyl grοup is methyl, with the fοrmula −CH₃

In the preparatiοn οf Grignard reagents, the reactiοn typically invοlves the reactiοn between an alkyl οr aryl halide and magnesium metal in an ether sοlvent. The general equatiοn fοr the fοrmatiοn οf a Grignard reagent can be represented as:

RX + Mg -> RMgX

Tο determine the limiting reagent in this reactiοn, we need tο cοmpare the mοles οf the alkyl οr aryl halide (RX) and the mοles οf magnesium (Mg) and identify which reactant is present in the lοwer quantity. The reactant that is cοnsumed cοmpletely and limits the amοunt οf prοduct fοrmed is the limiting reagent.

Let's assume we have a specific example where we are preparing a Grignard reagent by reacting 2 mοles οf alkyl οr aryl halide (RX) with 3 mοles οf magnesium (Mg).

Mοles οf RX = 2 mοles

Mοles οf Mg = 3 mοles

Since the stοichiοmetric ratiο between RX and Mg is 1:1 (1 mοle οf RX reacts with 1 mοle οf Mg), we can see that we have an excess οf Mg in this example.

The stοichiοmetry indicates that 2 mοles οf RX wοuld require 2 mοles οf Mg fοr cοmplete reactiοn. Hοwever, we have 3 mοles οf Mg, which is mοre than enοugh tο react with the 2 mοles οf RX.

Therefοre, in this example, the limiting reagent is the alkyl οr aryl halide (RX), as it is present in a lοwer quantity and will be cοmpletely cοnsumed during the reactiοn.

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Answer:

A. The atomic radius increases (in a group) with the increasing atomic number. This is because atomic size generally increases from top to bottom within a group because the greater the number of protons means the greater amount of electrons. The amount of electrons in orbitals determine an atom's size/radius.

B. Since Group 1A (Alkali Metals) are metals, they tend to form cations. Cations are always smaller than their original atom because the greater positive charge from the nucleus closes in the space between it and the electrons, thus "shrinking" its size. This is why the ionic radii are smaller than the atomic radii of the same element.

I hoped this helped <3

Explanation:

The solubility of silver carbonate in water is determined by the equilibrium constant, Ksp.

Silver carbonate, Ag2CO3, is sparingly soluble in water. When a solid Ag2CO3 is added to water, it dissociates into silver ions (Ag+) and carbonate ions (CO32-). The dissolution process can be represented as follows:

Ag2CO3(s) ⇌ 2Ag+(aq) + CO32-(aq)

The equilibrium constant for this dissolution reaction is denoted as Ksp. Ksp is the product of the concentrations of the dissolved ions raised to their stoichiometric coefficients. In this case, the Ksp expression is:

Ksp = [Ag+]^2 [CO32-]

The Ksp value is constant at a given temperature and represents the maximum amount of Ag2CO3 that can dissolve in water.

The options s = [Ag+], s = [CO32-], s = [Ag+]^2, and s = [Ag+][CO32-] do not correctly represent the relationship between the solubility and the concentrations of the ions. The solubility of Ag2CO3 is determined by the value of Ksp, not directly proportional to the concentration of silver ions or carbonate ions.

Therefore, the correct relationship for the solubility of silver carbonate in water is s = Ksp, where s represents the solubility of Ag2CO3.

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Answer:

can you please take a closer pic then i can answer

Explanation:

Answer:

the only thing you need to fix is to change the ice pack to coduction because it is making contact with your skin

Answer:

Explanation:

The pH of a solution can be found by using the formula

\(pH = - log ([ {H}^{+} ])\)

From the question

[H+] = 0.045 M

We have

\(pH = - log(0.045) \\ = 1.346787...\)

We have the final answer as

Hope this helps you

Answer:

1.35

Explanation:

One mole of the substance contains the (Avogadro number) molecules. The number of the atoms in 0.750 moles is 4.5  × 10²³ atoms.

The number of the molecules in 1 moles is as follows :

1 mole = 6.02 × 10²³ atoms or molecules

This number is called as the Avogadro number. Therefore, in 1 mole of the substance there will be 6.02 × 10²³ atoms or the molecules.

The number of the moles = 0.750 mol

The number of atoms in 0.750 mol is as :

The number of atoms = 0.750 × 6.02 × 10²³ atoms

The number of atoms  = 4.5  × 10²³ atoms.

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Answer:D.

Explanation:

Liquid water is lower in energy and more stable than a mixture of hydrogen and oxygen gases because the bonds between its molecules are stronger and more difficult to break.

When we say something is "lower in energy," we mean it has less potential to do work or produce a reaction than something with higher energy. This is because energy is stored in the bonds between atoms and molecules, and the strength of those bonds determines the potential energy of the substance.

In the case of hydrogen and oxygen gases versus liquid water, liquid water is lower in energy. This is because the bonds between the hydrogen and oxygen atoms in water are stronger than the bonds between the hydrogen and oxygen molecules in the gas phase. When hydrogen and oxygen gas react to form water, energy is released as the stronger bonds are formed.

Liquid water is also more stable than a mixture of hydrogen and oxygen gases. Stability refers to a substance's ability to resist change or decay over time. Water is more stable because its strong bonds make it less likely to break apart or react with other substances, while the mixture of hydrogen and oxygen gases is highly reactive and can potentially explode or ignite.

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Answer:

Explanation:

  3BaBr₂       +       2Na₃PO₄     =       6BaBr + Ba₃(PO₄)₂ (s)

3 x 297 = 891 gm                                          1 x 602 = 602 gm

891 gram of BaBr₂ yields     602 gram of precipitate

15.2 gram of BaBr₂ yields     602 x 15.2 / 891 gram of precipitate

= 10.23 gram

actual yield = 9.5 gram

percent yield = 9.5 x 100 / 10.23

= 92.86 % .

Firstly, we will use Charles’s Law to calculate the temperature of oxygen gas on increasing the volume. The Charles's law states that "At constant pressure, the volume of a given mass of a gas increases or decreases by 1/273 of its original volume at 0°C, for every 1°C rise or fall in temperature.

"Formula for Charles's law isV1/T1 = V2/T2Where V1, T1 = Initial volume and temperatureV2, T2 = Final volume and temperatureNow, we can calculate the final temperature (T2) as:T2 = (V2 × T1) / V1. Given Data: Initial Temperature (T1) = 145 KInitial Volume (V1) = 1.45 LFinal Volume (V2) = 6.50 LWe have to find the final temperature T2 to which the gas should be raised to occupy the volume of 6.50 L.

Given,V1 = 1.45 LV2 = 6.50 LT1 = 145 K Putting the values in the formula,T2 = (V2 × T1) / V1= (6.50 × 145) / 1.45= 650 KTherefore, the final temperature to which the oxygen gas should be raised to occupy a volume of 6.50 liters is 650 K.

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Mg2N3  compound having general formula X2Y2  it having cation as +3 charge and bonds ionically with group 15 in a 2:3 ratio.

When two or more elements combine chemically  in a specific mass ratio, the resulting product is called a compound. Compounds can be defined as substances consisting of two or more different types of elements in a fixed ratio of their atoms.

A compound is one where  different types of atoms have joined together to form molecules. For example, water is a compound. The chemical name of water is H2O because it contains two hydrogen atoms and one oxygen atom chemically bonded together.

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C. The theoretical yield of aspirin is found to be 4.2g

The largest amount of product that could be generated from the provided reactant amounts is termed as the theoretical yield. The quantity of product that actually formed during the reaction in a laboratory environment is known as the actual yield.

C₇H₆O₃ + C₄H₆O₃→ C₉H₈O₄ ( aspirin)

No of moles of  salicylic acid => 3.2/138.122 => 0.023 mol

no of moles of acetic anhydride => 1.08 g/mL x 6.3 mL / 102.089 g/mol

                                                        => 0.066mol

salicylic acid is limiting reagent

Theoretical yield calculated:

1 mole of salicylic acid=> 1 mole of aspirin

      Hence,  0.023  mol of aspirin formed in this reaction.

Theorectical yield of aspirin =>  0.023 mol x 180g/mol => 4.2g

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1 mole n2o4(g) in 1l and 1 mole n2o4(g) in 2l  compound in the following pairs would you expect to have the higher absolute entropy.

The correct option is (iii).

The lowest point on the enthalpy temperature scale is known as absolute zero. The entropy that a substance still possesses even at absolute zero is referred to as residual entropy. The vitreous state, or glass, is the most prevalent non-equilibrium state seen. Carbon monoxide is an additional example.

Free energy has to be negative for a process to be spontaneous. Reason: Changes in enthalpy and entropy are connected to changes in free energy. If a process is spontaneous, its change in entropy must always be positive.

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The solubility of caco3 (formula weight 100.1) is 0.0095 g in 1800 ml, The ksp is  8.6x10-8

Ksp is the solubility product constant, which is the equilibrium constant for a saturated solution of an ionic compound at a given temperature. To calculate the Ksp, we need to know the molar solubility of the compound.  The molar solubility of caco3 can be calculated from the given solubility, which is 0.0095 g in 1800 ml. To calculate molar solubility, we need to convert the solubility of caco3 into moles. 0.0095 g of caco3 is equal to 0.00094 moles.   Now, we can use the equation for Ksp, which is Ksp = [Ca2+][CO32-]. Substituting the molar solubility of caco3, we get Ksp = 0.00094 x 0.00094 = 8.6x10-8.

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Answer:

molar mass sodium chromate = 162g

12.6g ÷ 162g/mole = moles sodium chromate (This is the solute)

molalrity or M = moles solute ÷ lliters of solution (You'll have to change given mL to L)