Predict the products of the reactions, then balance the equation and identify the type of reaction.

If the equation is already balanced without coefficients, make sure to note this or I will assume you did not balance it and you will not earn full credit.

Don't forget about concepts you learned last semester including diatomic molecules and how to criss-cross when writing formulas.


A) C4H10 + O2


B) Zn + Cu(NO3)2


C) NaOH + KBr


D) Li + S2


E) H2O



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The molecular mass Ca(OH)2 = 40.078 g/mol

Grams of Ca(OH)2 = 275.935 g

Ca(OH)2 is calcium hydroxide, a compound composed of calcium, oxygen, and hydrogen atoms.  The chemical formula for calcium hydroxide is Ca(OH)2, and the equation for its formation is:  CaO + H2O → Ca(OH)2

Ca(OH)2 -> Ca2+ + 2OH-

The equation represents the dissociation of calcium hydroxide, Ca(OH)2, in water to form calcium ions (Ca2+) and hydroxide ions (OH-) in solution.

Molarity (M) = [tex]\frac{moles of solute}{liter of solution}[/tex]

Moles of Ca(OH)2 = Molarity x Volume x Molecular Weight

Moles of Ca(OH)2 = [tex]0.50 M * 0.100 L * 74.10 g/mol[/tex]

Moles of Ca(OH)2 = [tex]3.705 moles[/tex]

Grams of Ca(OH)2 = Moles of Ca(OH)2 x Molecular Weight

Grams of Ca(OH)2 = [tex]3.705 moles * 74.10 g/mol[/tex]

Grams of Ca(OH)2 = [tex]275.935 g[/tex]

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The behaviour of a red blood cell in each of the solutions can be explained by osmosis:

Solution A (4.47% NaCl): Red blood cells are placed in a hypertonic solution, meaning the concentration of solute (NaCl) is higher outside the cell than inside. This results in a net movement of water out of the cell, causing the cell to shrink or "crenate."

Solution B (3.73% glucose): Red blood cells are placed in an isotonic solution, meaning the concentration of solute (glucose) is equal inside and outside the cell. This results in no net movement of water and no change in the shape of the cell.

Solution C (distilled water): Red blood cells are placed in a hypotonic solution, meaning the concentration of solute is lower outside the cell than inside. This results in a net movement of water into the cell, causing the cell to swell and potentially burst, which is known as "haemolysis."

Solution D (8.81% glucose): Like solution A, red blood cells placed in this hypertonic solution will experience crenation.

Solution E (5.0% glucose and 0.9% NaCl): Red blood cells placed in this solution will experience neither haemolysis nor crenation because the concentration of solute is not high enough to cause either effect.

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The covalent bond formed between two amino acids is called a peptide bond.

Peptide bonds are formed by the condensation reaction between the carboxyl group (-COOH) of one amino acid and the amino group (-NH2) of another, resulting in the release of a molecule of water (H2O). This reaction forms a covalent bond, known as a peptide bond, which links the two amino acids together in a linear sequence.

Peptide bonds are critical in the formation of polypeptides and proteins, as they determine the sequence and structure of these biomolecules. The peptide bond is a single bond, and its formation and stability are due to the partial double bond character that it possesses. This partial double bond character is due to the delocalization of electrons in the bond and the contribution of resonance from the atoms on either side of the bond.

In summary, a peptide bond is a type of covalent bond that forms between two amino acids and is critical in the formation and stability of polypeptides and proteins.

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Hydrocarbon chain to which hydrogens have been added. A dehydration reaction type of reaction has occurred.

A chemical reaction is a method that leads to the chemical transformation of 1 set of chemical materials to any other. Classically, chemical reactions embody changes that handiest involve the positions of electrons in the forming and breaking of chemical bonds among atoms, with no alternative to the nuclei (no alternate to the factors gift), and can often be defined by a chemical equation. Nuclear chemistry is a sub-area of chemistry that entails the chemical reactions of risky and radioactive factors where each electronic and nuclear modification can occur.

The substance (or materials) to start with concern in a chemical response are referred to as reactants or reagents. Chemical reactions are normally characterized by a chemical exchange, and they yield one or greater merchandise, which normally have houses special from the reactants. Reactions regularly consist of a series of personal sub-steps, the so-known as primary reactions, and the facts on the precise direction of movement are part of the reaction mechanism.

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As the Earth rotates, the circulating air is deflected. Instead of flowing straight, air deflects to the right in the Northern Hemisphere and to the left in the Southern Hemisphere, creating curved paths.

Hurricanes, for example, spin counterclockwise in the Northern Hemisphere and clockwise in the Southern Hemisphere due to the Coriolis effect. The Coriolis effect deflects air from all directions as it flows toward the low-pressure area at the center of a storm.

Winds flowing from the equator to the North Pole and from the North Pole to the equator are deflected to the right by Coriolis Force, while winds flowing north-south and south-north in the southern hemisphere are deflected to the left.

Thus, The Coriolis effect refers to this deflection.

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The balanced chemical equation for the combustion of octane (C8H18) is: C8H18 + 12.5O2 → 8CO2 + 9H2O

To calculate the mass of water produced, we first need to determine the amount of octane present in 1 gallon (3.8 L) of gasoline. The density of gasoline is around 0.7 g/mL, so 1 gallon (3.8 L) of gasoline would have a mass of approximately: 3.8 L * 0.7 g/mL = 2.66 kg = 2660 g

From the balanced chemical equation, we see that for every mole of octane burned, 9 moles of water are produced. To convert the mass of octane to the number of moles, we can use the molar mass of octane, which is approximately 114 g/mol: 2660 g / 114 g/mol = 23.4 mol

Therefore, the amount of water produced from the combustion of 1 gallon of gasoline would be: 23.4 mol * 9 moles H2O/1 mole C8H18 * 18 g H2O/mole = 3,741 g or 3.7 kg

So, approximately 3.7 kg of water would be produced from the combustion of 1 gallon (3.8 L) of gasoline.

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The volume (in liters) of the carbon dioxide gas produced if the reaction is carried out at STP is 65.5 L

We'll begin by examining the eqaution for the reaction to get useful information about the reaction. Details below:

CH₄ +2O₂ -> CO₂ + 2H₂

From the balanced equation above,

1 L of methane, CH₄ reacted to produce 1 L of carbon dioxide, CO₂

With the above information, we can obtain the volume of carbon dioxide, CO₂ produced when 65.5 L of methane, CH₄ reacts at STP. Details below:

1 L of methane, CH₄ reacted to produce 1 L of carbon dioxide, CO₂

Therefore

65.5 L of methane, CH₄ will also react to produce 65.5 L of carbon dioxide, CO₂

Thus, the volume of carbon dioxide, CO₂ produced is 65.5 L

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The balanced chemical reaction between lithium bromide and silver nitrate is written as follows:

[tex]\rm LiBr (aq) + AgNO_{3} (aq) \rightarrow LiNO_{3} (aq) + AgBr (s)[/tex]

Here, the spectator ions are Li+ and NO₃-. Hence, the net ionic equation is:  [tex]\rm Ag^{+} (aq) + Br^{-}(aq) \rightarrow AgBr (s)[/tex]

The balanced equation  of a reaction shows the perfect stoichiometry of reactants and products. The number of each elements in the reactants must be equal to their number in the product side.

Net ionic equation of a reaction is written in terms of the ions which are giving the solid product. Remaining ions are called spectator ions.

The remaining reactions can be completed as following :

[tex]\rm NH_{4}I (aq) + Pb(NO_{3}) _{2}(aq) \rightarrow NH_{4} NO_{3} (aq) + PbI_{2} (s)[/tex]

Here, the spectator ions are NH4+ and NO₃-.

Then, net ionic equation is:

[tex]\rm Pb^{2+} (aq)+ I^{-} (aq) \rightarrow PbI_{2} (s)[/tex]

The third reaction can be written as follows:

[tex]\rm (NH_{4})_{2}S + KOH \rightarrow NH_{4}OH + K_{2}S[/tex]

Here, the solid product is potassium sulphide. The net ionic reaction is written as follows:

[tex]\rm K^{+} (aq) + S^{2-} (aq) \rightarrow K_{2} S(s)[/tex]

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We can separate the mixture of copper and salt by putting both mixtures in water. Salt will dissolve and copper will not. We can separate them easily.

Salt can dissolve in water because it is a soluble substance. Salt is made up of the negative ion of an acid and the positive ion of the base. When an acid and base dissolve neutralization reaction occurs.

Copper doesn't dissolve in water because copper is a metal. Not even in salty water. Copper has great metal conductivity. The melting and boiling point of copper is very high, that is, 1084.32 degrees Celsius and 2562 degrees Celsius.

Copper metal doesn't dissolve in water however exposure to such metals to air adds a layer of oxide to the metal. The oxide layer does dissolve in water to a slight extent.

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You would need 50 μl of the 10 mg/ml bovine gamma-globulin solution to prepare 50 μl of 0.5 mg/ml bovine gamma-globulin solution.

How to prepare the bovine gamma-globulin solution?

To calculate the amount of 10 mg/ml bovine gamma-globulin needed to prepare 50 μl of 0.5 mg/ml bovine gamma-globulin, we can use the following formula:

C1 * V1 = C2 * V2

where C1 is the concentration of the starting solution (10 mg/ml), V1 is the volume of the starting solution needed, C2 is the desired concentration (0.5 mg/ml), and V2 is the desired volume (50 μl).

We want to find V1, so we can rearrange the formula to:

V1 = (C2 * V2) / C1

Plugging in the values, we get:

V1 = (0.5 mg/ml * 50 μl) / (10 mg/ml)

V1 = 0.05 ml = 50 μl

So, you would need 50 μl of the 10 mg/ml bovine gamma-globulin solution to prepare 50 μl of 0.5 mg/ml bovine gamma-globulin solution.

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The pH of 0.10 m HClO2(aq) was measured, and it was determined to be 1.2, with chlorous acid concentrations of 0.1072 and 0.9695. A 0.10 m propylamine, C3H7NH2, the aqueous solution was tested.

the pH was found to be 11.86 with propylamine concentrations of 5.65 x 104 and 3.25.

In order to figure this out, we must put down the chemical equation describing the two processes in question.

a) A 0.10 M solution of HClO2 with a pH of 1.2

Let's get first with the pH the concentration of the H3O+ in equilibrium:

[H₃O⁺] = 10^(-pH)

[H₃O⁺] = 10^(-1.2) = 0.063 M

Now, let's write the equilibrium reaction for this acid:

HClO₂ + H₂O <-------> H₃O⁺ + ClO₂⁻

Now, an ICE chart for this reaction:

HClO₂ + H₂O <-------> H₃O⁺ + ClO₂⁻

I:      0.1                                0          0

C:      -x                               +x         +x

E:   0.1-x                               x          x

This allows us to create the following expression for Ka:

Ka = [H₃O⁺] [ClO₂⁻] / [HClO₂] = x² / 0.1 - x

calculate it above and it's 0.063 M, so, all we have to do is replace this value in the expression, and solve for Ka:

Ka =  (0.063)² / 0.1 - 0.063

Ka = 0.1072

Then the pKa is:

pKa = -logKa

pKa = -log(0.1072)

pKa = 0.9695

With this, we use the same procedure for part b) but instead of using pH and H₃O⁺, we will use OH⁻ and pOH.

b) 0.1 M of a C₃H₇NH₂ solution with pH = 11.86

Like in part a) we calculate the concentration of [OH⁻] instead because this is a base so, to get that, we use pOH:

14 = pH + pOH

pOH = 14 - pH

pOH = 14 - 11.86 = 2.14

[OH⁻] = 10^(-pOH)

[OH⁻] = 10^(-2.14) =7.24x10⁻³ M

Now, we use an ICE chart again and do the same procedure as part a) so:

C₃H₇NH₂ + H₂O <-------> C₃H₇NH₃⁺ + OH⁻

I:      0.1                                0          0

C:      -x                               +x         +x

E:   0.1-x                               x          x

Kb = (7.24x10⁻³)² / (0.1 - 7.24x10⁻³)

Kb = 5.65x10⁻⁴

pKb = -log(5.65x10⁻⁴)

pKb = 3.25

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The required Ka and pKa of HClO2 are 0.1072 and 0.9695 while the values of Kb and pKb of propylamine are 5.65x10⁻⁴ and 3.25 respectively.

Given the pH of HClO2 = 1.2

The concentration of HClO2 = 0.1M

(a) We know that [H₃O⁺] = 10^(-pH) then,

[H₃O⁺] = 10^(-1.2) = 0.063 M

the equilibrium reaction for this acid be:

[tex]HClO2 + H2O < ------- > H3O+ + ClO2-[/tex]

The ICE chart for this equation is :

     [tex]HClO2 + H2O < --- > H3O+ + ClO2-[/tex]

I:      0.1                                0          0

C:      -x                               +x         +x

E:   0.1-x                               x          x

Then, Ka = [H3O+] [ClO2-] / [HClO2] = x² / 0.1 - x = 0.63 * 0.63/1 - 0.63

Ka = 0.1072

Then, pKa = -logKa

pKa = -log(0.1072)  = 0.9695

(b) concentration of propylamine = 0.1M

The pH of propylamine = 11.86

As [OH] is a base, we determine the concentration of [OH].

14 = pH + pOH

pOH = 14 - 11.86 = 2.14

[OH⁻] = 10^(-pOH) = 10^(-2.14) = 7.24x10⁻³ M

The ICE chart for this reaction be:

[tex]C3H7NH2 + H2O < --- > C3H7NH3+ + OH-[/tex]

I:      0.1                                               0              0

C:      -x                                              +x            +x

E:   0.1-x                                              x               x

Kb = (7.24x10⁻³)² / (0.1 - 7.24x10⁻³) =  5.65x10⁻⁴

pKb = -log(5.65x10⁻⁴) = 3.25

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complete question: When the pH of 0.10M HClO2(aq) was measured, it was found to be 1.2. (a). What are the values of Ka and pKa of chlorous acid? (b). The pH of a 0.10M propylamine, C3H7NH2, aqueous solution was measured as 11.86. What are the values of Kb and pKb of propylamine?

According to chemical equilibrium, [tex]\frac{d[I_2]}{dt}[/tex] and [tex]\frac{d[NO]}{dt}[/tex] is  the expressions for the rates of appearance of I₂ and NO respectively.

Chemical equilibrium is the state that develops during a reversible chemical reaction when there is no net change in the ratio of reactants to products. When a chemical reaction is reversible, the products immediately after they are generated combine to form the reactants once more. There is no net change in the quantity of the chemicals involved in the chemical reaction when the two opposing processes are in equilibrium and happening at equal rates. When the reaction is in equilibrium, it is deemed finished. The quantitative formulation identifies the conditions needed for equilibrium. Changes in concentration, changes in pressure and temperature, and the presence of a catalyst are all factors that influence chemical equilibrium.

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The specific heat for the given sample will be 0.522 J/g°C

Q= mcΔT,

here Q is the heat energy absorbed,

m is the mass of the sample,

ΔT is the change in temperature.

Q= m*c*ΔT,

Q= m*c*(T2-T1)

since we have to find the specific heat capacity therefore,

c= Q*(T2-T1)/m

putting values,

c= 392/(65.3-42.1)*32.3

c= 392/23.2*32.3

c= 392/749.36

c=0.522 J/g°C

The specific heat capacity is the amount of heat absorbed by a unit mass of a material when it's temperature is increased by 1°C.

The S.I unit for Specific heat capacity is Joule per kelvin per kilogram.

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Zinc and potassium chloride wouldn't react with each other. There is no reaction because potassium has a higher degree of reactivity than zinc.

Potassium cannot be removed from a compound by zinc. Since zinc is replacing potassium, it must have a greater activity level. It is, however, lower, therefore there is no interaction between these two molecules.

When potassium hydroxide and zinc metal combine, potassium zincate is created as well as hydrogen gas.

Nitric acid being a potent oxidizing agent prevents zinc from reacting with it. It reduces itself to an oxide while oxidizing the hydrogen gas produced by the interaction of zinc with nitric acid to make water.

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There would be no reaction between Potassium Chloride and Zinc as zinc is less reactive than potassium.

Zinc has the chemical symbol Zn and the atomic number 30. At room temperature, zinc is a somewhat brittle metal with a shiny-greyish look when oxidation is eliminated. It is the first element in periodic table group 12 (IIB).

Zinc is the twenty-fourth most prevalent metal in the Earth's crust, with five stable isotopes. Sphalerite (zinc blende), the zinc sulfide mineral, is the most common zinc ore. There would be no reaction between Potassium Chloride and Zinc as zinc is less reactive than potassium.

Therefore, there would be no reaction between Potassium Chloride and Zinc as zinc is less reactive than potassium.

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The rate of reaction is directly proportional to the rate of consumption of a reactant and its stoichiometric coefficient.

The rate of reaction refers to the change in the concentration of a reactant or product over time, and it is directly proportional to the stoichiometric coefficient of the reactant. For example, if a reactant has a stoichiometric coefficient of 2 in a reaction, it will be consumed twice as fast as a reactant with a coefficient of 1. The rate of reaction can be determined by measuring the change in concentration of the reactant over time and using the stoichiometry of the reaction to calculate the rate. This relationship is crucial in understanding how reactions proceed and how to control their speed by manipulating the concentration of reactants and products.

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According to the stoichiometry of the given chemical equation, 74.13 g of aluminium chloride and 1.66 g of hydrogen gas are formed.

It is the determination of proportions of elements or compounds in a chemical reaction. The related relations are based on law of conservation of mass and law of combining weights and volumes.

Stoichiometry is used in quantitative analysis for measuring concentrations of substances present in the sample.

53.96 g aluminium gives 266.68 g aluminium chloride, thus 15 g aluminium will give 15×266.68/53.96=74.13 g and 53.96 g aluminium gives 6 g hydrogen , thus 15 g will give 15×6/53.96=1.66 g  of hydrogen.

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1.32 g of oxygen combined with 2.00 g of magnesium to form 3.32 g of magnesium oxide.

What is a balanced equation?

A chemical equation is said to be balanced when each element has an equal number of atoms on both the reactant and product sides of the equation. In other words, the equation depicts a chemical reaction in which the total number of atoms present prior to the reaction is equal to the total number present following the reaction.

The law of conservation of mass is upheld when the equation is balanced, and the reaction that is occurring is correctly depicted.

You must find the difference between the total mass of the reactants and the mass of the product in order to calculate the mass of oxygen that combined with magnesium. The chemical equation for the reaction of magnesium and oxygen is as follows:

O2 + 2Mg = 2MgO

Therefore, the mass of magnesium oxide (MgO) produced by the reaction of 2.00 g of magnesium (Mg) and a small amount of oxygen (O) can be expressed as follows:

x g O + 2.00 g Mg = 3.32 g MgO

where x represents the oxygen's mass. You can calculate x by deducting the mass of magnesium from the product's overall mass:

We get 1.32 g from x = 3.32 g - 2.00 g.

Therefore, 1.32 g of oxygen and 2.00 g of magnesium were combined.

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Exothermic, where less heat is released than it is taken and in exothermic more heat is released in making bonds.

Exothermic reactions in solution give out energy and the temperature increases, while endothermic reactions take in energy and the temperature decreases. Bonds are broken and made in reactions.

Breaking and making bonds can be described as follows-

exothermic - if more heat energy is released in forming bonds in the products than is taken in when breaking bonds in the reactants. Bond energy is less.

endothermic - if less heat energy is released in forming bonds in the products than is taken in when breaking bonds in the reactants. Bond energy is more.

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You'll have 20.5 g of hydrochloric acid (HCl) left, which is the answer to your query.

Data

HCl = 31.4 g

NaOH = 12 g

insufficient HCl =?

equilibrium in a chemical reaction

NaCl and H2O are produced from HCl and NaOH.

HCl's molar mass is equal to 1 + 35.5 = 36.5 g.

NaOH's molar mass is 40 g (23 + 16 + 1)

Figure out the limiting reactant.

Theoretical yield: 36.5/40 = 0.9125 for HCl/NaOH.

Research yield: HCl/NaOH = 31.4/12 = 2.62

Conclusion

Because of the increasing experimental yield, NaOH is the limiting reactant.

The excess reactant's mass should be determined.

35. 5 g of HCl ———————— NaOH weight 40 g

x ———————— NaOH in 12 g

x = (12 x 36.5) / 40

x = 438 / 40

x = 10.95 grams of HCl

Surplus HCl = 31.4 - 10.95

= 20.5 g

You'll have 20.5 g of HCl left, which is the answer to your query.

The complete question is,

To create aqueous sodium chloride and liquid water, aqueous hydrochloric acid must be combined with solid sodium hydroxide. Consider combining 12.g of sodium hydroxide with 31.4g of hydrochloric acid. Determine the smallest amount of hydrochloric acid that could possibly remain after the reaction. The quantity of significant digits in your response must be accurate.

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Answer: 0.0105 mol AgCl

Explanation:

Step 1: To find moles AgNO₃, use 70.0 mL and 0.150 M and the definition of molarity. Convert 70.0 mL to L.

70.0 mL x (1 L/1000 mL) = 0.070 L

M = mol/L

0.150 = mol/0.070

0.150 x 0.070 = mol

0.0105 mol AgNO₃

Step 2: Use the balanced equation and the moles AgNO₃ from step 1 to determine moles precipitate (AgCl) when reacting with excess CaCl₂.

0.0105 mol AgNO₃ x (2 mol AgCl/2 mol AgNO₃) = 0.0105 mol AgCl

0.0105 mole of precipitate will be formed when 70.0 mL of 0.150 M AgNO[tex]_3[/tex] is reacted with excess CaCl₂ in the given chemical reaction.

In chemistry, a mole, usually spelt mol, is a common scientific measurement unit for significant amounts of very small objects like atoms, molecules, or even other predetermined particles. The mole designates 6.02214076 1023 units, which is a very large number. Under the International Units of Measurement (SI), the mole is defined as this number as of May 20, 2019, according the General Meeting on Weights and Measurements.

The quantity of atoms discovered through experimentation to be present in 12 grammes of carbon-12 was originally used to define the mole. On honour of a Italian scientist Amedeo Avogadro, the amount of cells in a mole is also known as Avogadro's number or Avogadro's constant (1776–1856).

70.0 mL x (1 L/1000 mL) = 0.070 L

M = mol/L

0.150 = mol/0.070

0.150 x 0.070 = mol

0.0105 mol AgNO₃

0.0105 mol AgNO₃ x (2 mol AgCl/2 mol AgNO₃) = 0.0105 mol AgCl

Therefore, 0.0105 mole of precipitate will be formed when 70.0 mL of 0.150 M AgNO3 is reacted with excess CaCl₂ in the given chemical reaction.

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There are 2 moles of excess reactant remain unused.

The given reaction: -

3H2(g) + N2 -----> 2NH3(g)

3 mole  1 mole       2 mole

Here in the given reaction we see that 3 mole of H2 reacts with 1 mole of N2 to produced 2 mole of NH3.

The mixture contain 3.0 mole of H2 and 3.0 mole of N2,

So, 1.0 mole of N2 can react with 3.0 mole of H2.

So (3.0 - 1.0) = 2.0 moles of N2 remain unused.

2.00 mole of N2 reactant remain unused.

Reactants are the substances that are involved in a chemical reaction and undergo changes to produce new substances, known as products. In a chemical reaction, the reactants are the starting materials that are combined to form the end products. These reactants are characterized by their molecular formula and chemical properties, which determine the type of reaction that will occur.

The amount of reactants used in a reaction is an important factor in determining the amount of product produced. In some reactions, only a small amount of reactant is needed to produce the desired product, while in others, large amounts of reactants are required. The type of reactants used in a reaction also determines the rate at which the reaction will proceed and the amount of energy required to initiate the reaction.

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The phase with the greatest intermolecular forces compared to their kinetic energies is the solid phase.

In a solid, the particles are packed closely together and are held in fixed positions by strong intermolecular forces such as covalent bonds or hydrogen bonds. These strong forces keep the particles from moving freely, giving the solid its characteristic rigidity and resistance to change of shape. The kinetic energy of the particles in a solid is much lower than in a liquid or gas, where the particles are more free to move and are not held in fixed positions. This difference in intermolecular forces and kinetic energy gives solids their unique physical properties and makes them behave differently than liquids or gases.

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Acetic acid (hc2h3o2) is the active ingredient in vinegar. 26.67 grams   mass percent composition of oxygen in acetic acid.

Acetic acid, also known as HC2H3O2, is composed of two hydrogen atoms, two carbon atoms, and two oxygen atoms. To calculate the mass percent composition of oxygen in acetic acid, we must first find the molar mass of acetic acid. The molar mass of acetic acid is 60.052 g/mol. The molar mass of oxygen is 16.00 g/mol. Therefore, the mass percent composition of oxygen in acetic acid is 26.67%. This means that for every 100 grams of acetic acid, there are approximately 26.67 grams of oxygen atoms. the pressure of a gas is equal to the number of moles of the gas multiplied by its temperature and the universal gas constant, divided by the volume of the container.  

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The Volume of water contains 165 mg of pb is 0.165ml

The amount of matter in a particle or object is represented by the dimensionless quantity mass (symbolised m). The kilogramme (kg) is the accepted unit of mass in the International System (SI).

We can use the following formula to determine how much water has 165 mg of lead in it:

Volume times Density = Mass

Since we are aware of the density of water (1.0 g/ml) and the amount of

lead (165 mg), we can modify the formula to determine the volume:

Mass x Density = Volume

Unit conversion to SI units:

165 mg is equal to 0.165 g

We can now determine the volume:

volume is equal to 0.165 g / 1.0 g/ml (0.165 ml).

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The placement of a plastic coating (a, b, c, or d below) that could be used to prevent galvanic corrosion would depend on the type of plastic coating being used and the specifics of the joined copper and iron pieces that are exposed to salt water conditions.

Generally, a plastic coating should be applied to prevent any direct contact between the copper and iron pieces. Placement “a” and “b” could both be used, as they would create a barrier between the two pieces, while placement “c” and “d” would not be as effective because there would still be direct contact between the two pieces.

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decrease the pressure of a 2.0 L container of oxygen from 3.2 atm to 1.0 atm, the volume of the container would need to be 6.4L

In order to decrease the pressure of a 2.0 L container of oxygen from 3.2 atm to 1.0 atm, the volume of the container would need to be increased. This can be calculated using Boyle's Law, which states that the pressure and volume of a gas are inversely proportional. Therefore, in order to reduce the pressure from 3.2 atm to 1.0 atm, the volume would need to be increased to 6.4 L. This can be found by solving the equation PV = nRT for V, with P1 being 3.2 atm, P2 being 1.0 atm, n being 1 mol, R being 0.0821, and T being 300 K. Solving this equation gives V2 = 6.4 L. Thus, the volume of the container would need to be increased to 6.4 L in order to decrease the pressure to 1.0 atm.

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The remaining amount after 1000 years is 323.33 mg.

What is radioactivity decay?

An atom's nuclei exhibit radioactivity as a result of nuclear instability. Henry Becquerel made this discovery in 1896. The process of radioactivity is when an unstable atom's nucleus releases radiation to lose energy. In a drawer containing photographic plates, a small quantity of uranium compound was placed after being wrapped in black paper. When these plates were later examined, the findings showed that an exposure had occurred. The phrase "radioactive decay" is used to describe this occurrence. Radioactive elements are those elements or isotopes that emit radiation and undergo radioactivity.

The formula of half-life is

[tex]t_{\frac{1}{2}[/tex] = ln 2/λ

Given that the half-life of radium-226 is 1590 years.

λ = ln 2/ 1590

The formula of radioactivity decay is

N = N₀e^(-λt)

N = final amount

N₀ = initial amount

t = time

Given that

The initial amount is N₀ = 500 mg, λ = ln 2/ 1590, and t = 1000 years

N =  500 e^(- (ln 2/ 1590) ×1000)

N = 323.327737322

N = 323.33

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When compared to the initial nuclide, the alpha decay product: The answer is B. The atomic number of the product is two less than the atomic number of the original nuclide.

What is Alpha Decay?

A nuclear process known as "alpha decay" causes the parent nucleus to emit an alpha particle. The alpha particle is made up of two neutrons and two protons. There is a radioactive decay process known as "alpha decay" in which an atomic nucleus produces an alpha particle and radioactively decays into a separate atomic nucleus with a mass number reduced by four and an atomic number reduced by two.

Alpha decay reduces atomic mass by 4 and atomic number by 2.

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Balanced equation: Fe(NO₃)₂(aq) + Na₂CO₃(aq) ----> FeCO₃(s) + 2NaNO₃(aq) Ionic equation:  Fe²⁺(aq) + 2NO₃⁻(aq) + 2Na⁺(aq) + CO₃²⁻(aq) ----> FeCO₃(s) + 2Na⁺(aq) + 2NO₃⁻(aq).

An equation for a chemical reaction is said to be balanced if both the reactants and the products have the same number of atoms and total charge for each component of the reaction.

It is typical to balance chemical equations for both mass and charge in aqueous solutions. Equal numbers and types of atoms are produced on both sides of the equation when balancing for mass.

When the charge is balanced, there is no net charge on either side of the equation. Only the ions are depicted in the equation's state of matter (aq), which denotes that they are in water.

Therefore, Balanced equation: Fe(NO₃)₂(aq) + Na₂CO₃(aq) ----> FeCO₃(s) + 2NaNO₃(aq) Ionic equation:  Fe²⁺(aq) + 2NO₃⁻(aq) + 2Na⁺(aq) + CO₃²⁻(aq) ----> FeCO₃(s) + 2Na⁺(aq) + 2NO₃⁻(aq).

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The pH strip is used to test the pH of a solution. The pH of water is neutral which is around 7.

The pH is known as the power of hydrogen. The pH is used to measure the  degree of basicity and acidity of a solution. The amount of hydrogen ion concentration in a solution determines the pH of the solution.  Mathematically, pH is given by the formula:

pH -= -log [H⁺]

The pH strip is a strip of litmus paper with which a person can measure the pH value of a liquid solution. The substance in the pH paper causes the paper to show a different color at different acidity values. The official pH scale is between the pH values of 0 to 14, where 0 is very acidic and 14 very alkaline and 7 is neutral pH.

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Answer:

The pH value of the water is 7. And I don't exactly know what would happen if you put a straw into it and blew into it, but if I had to make a guess then I would guess that the pH value would go down because the water is moving around.