Help with number 17 please

The energy released in the nuclear reaction of 4H → He + 2e+ + 2ve is 2.224 MeV.

Recall that the mass-energy equivalence formula,

   E=mc²

We need to convert the masses from atomic mass units (u) to kilograms (kg) first, and then multiply by the speed of light squared (c²) in units of meters per second.

The change in mass between the reactants and products is:

Δm = (4.00150 u - 4 x 1.00723 u) x 1.66054 x 10⁻²⁷kg/u

= 0.02916 kg

where we have used the conversion factor 1 u = 1.66054 x 10⁻²⁷kg/u

The energy released is then:

E = Δm x c² / (1.60218 x 10⁻¹³ MeV/J)

= 0.02916 kg x (299792458 m/s)² / (1.60218 x 10⁻¹³ MeV/J)

= 2.224 MeV

Therefore, the energy released in this nuclear reaction is 2.224 MeV.

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The concept ideal gas equation is used here to determine the volume of the carbondioxide. Combustion reactions are generally highly exothermic reactions. The volume of CO₂ is

A combustion is a chemical reaction in which a fuel undergoes oxidation as a result of the reaction with an oxidizing agent which causes the release of energy in the form of heat.

15.0 °C = 288 K

The ideal gas equation is:

PV = nRT

V = nRT / P

V = 354 × 0.0821 × 288 / 0.995 = 8412.3 L

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The difference between the actual yield and the theoretical yield was 0.71 grams, the moles of copper produced was 0.011 moles, the theoretical yield was 0.014 grams, and the percent yield was 79%.        The main answers are correct.

The actual yield was determined by weighing the copper product and subtracting the weight of the filter paper used. The theoretical yield was calculated based on the amount of limiting reactant used and stoichiometric ratios.

The percent yield was calculated by dividing the actual yield by the theoretical yield, and then multiplying by 100. A percent yield of 79% indicates that the reaction was somewhat efficient, but there were some factors that led to a lower yield than expected. Possible factors could include experimental error, loss of product during filtration, or incomplete reaction.

Overall, the results suggest that there may be room for improvement in the experimental procedure to increase the efficiency of the reaction.

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Taking into account the reaction stoichiometry, 13.33 grams of oxygen is required to oxidise 10g of ammonia to NO.

In first place, the balanced reaction is:

4 NH₃ + 5 O₂ → 4 NO + 6 H₂O

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:

The molar mass of the compounds is:

By reaction stoichiometry, the following mass quantities of each compound participate in the reaction:

The following rule of three can be applied: If by reaction stoichiometry 120 grams of NO are produced by 160 grams of O₂, 10 grams of NO are produced by how much mass of O₂?

mass of O₂= (10 grams of NO ×160 grams of O₂)÷120 grams of NO

mass of O₂= 13.33 grams

Finally, 13.33 grams of O₂ is required.

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10.5L is the total volume of gas forms if it is collected over water at a temperature of 25 ∘C and a total pressure of 763 mmHg.

A measurement of three-dimensional space is volume. It is frequently expressed quantitatively using SI-derived units, like the cubic metre or litre, or different imperial or US-standard units, including the gallon, quart and cubic inch.

Volume and length (cubed) have a symbiotic relationship. The volume more a container is typically thought of as its capacity, not as the amount of space it takes up. In other words, the volume is the quantity of fluid (liquid or gas) that the container may hold.

2Ag[tex]_2[/tex]O(s)→4Ag(s)+O[tex]_2[/tex](g)

moles of Ag = 16.5/ 107.8=0.15 moles

moles of oxygen = (1/2)×0.15 =0.075moles

P×V = n×R×T  

763×V =0.075×0.081×25

V= 10.5L

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Ba(NO₃)₂ has the following percentage composition: 52.6% Ba, 10.7% N, and 36.7% O.

The molar mass of Ba(NO₃)₂ is:

Ba: 1 x 137.33 g/mol = 137.33 g/mol

N: 2 x 14.01 g/mol = 28.02 g/mol

O: 6 x 16.00 g/mol = 96.00 g/mol

Adding these up gives us a total molar mass of 261.35 g/mol.

The mass percent of each element is then:

Ba: (137.33 g/mol / 261.35 g/mol) x 100% = 52.6%

N: (28.02 g/mol / 261.35 g/mol) x 100% = 10.7%

O: (96.00 g/mol / 261.35 g/mol) x 100% = 36.7%

Therefore, the percentage composition of Ba(NO₃)₂ is: 52.6% Ba, 10.7% N, and 36.7% O.

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Answer:

The reaction between ferric chloride and potassium hydroxide leads to the formation of ferric hydroxide and potassium. It is a precipitation reaction in which ferric and hydroxide ion on reaction with each other results in the formation of ferric hydroxide as reddish-brown precipitate.

The statement that is true is that It is endothermic and DH equals +91.8 kJ.

We can see that in this case that the heat of the reaction which we cam also call the enthalpy of the reaction is positive. Let us know that when we have a positive enthalpy what we have is an endothermic reaction.

Endothermic reactions are typically observed as a decrease in temperature, as energy is absorbed from the surroundings to fuel the reaction. Examples of endothermic reactions include the melting of ice.

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Missing parts;

Given the balanced equation representing a reaction at 101.3 kPa and 298 K:

N2(g) + 3H2(g) => 2NH3(g) + 91.8 kJ

Which statement is true about this reaction?

(1) It is exothermic and DH equals -91.8 kJ.

(2) It is exothermic and DH equals +91.8 kJ.

(3) It is endothermic and DH equals -91.8 kJ.

(4) It is endothermic and DH equals +91.8 kJ.

The molecular formula of a compound is the whole number multiple of its empirical formula. The empirical formula is also called the simplest formula, the percent composition of a compound leads to the empirical formula.

The empirical formula of a compound can be defined as the formula which gives the simplest whole number ratio of atoms of various elements present in one molecule of the compound.

To calculate empirical formula:

1. Calculate the moles of each element of the compound using percentage or mass

2. Calculate the ratio of each mole

3. Write the empirical formula

n (H) = m / M = 4 / 1 = 4 mol

n (O) = 64 / 16 = 4

H = 4/4 = 1

O = 4/4 = 1

So empirical formula is OH.

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The balanced  chemical equations with suitable coefficients are 2 Cu(IO₃) + K₂(CO₃) → 2 KIO₃ + Cu₂CO₃, Fe₂(CO₃)₃ + 6 Cs → 3 Cs₂(CO₃) + 2 Fe,

2 NaClO₃ → 2 NaCl + 3 O₂.

Chemical equation is a symbolic representation of a chemical reaction which is written in the form of symbols and chemical formulas.The reactants are present on the left hand side while the products are present on the right hand side.

A plus sign is present between reactants and products if they are more than one in any case and an arrow is present pointing towards the product side which indicates the direction of the reaction .There are coefficients present next to the chemical symbols and formulas .

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Answer:

Specific heat capacity is a measure of how much energy is needed to raise the temperature of a material and is defined as follows:

Answer:

2.05 mL

Explanation:

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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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The mass in grams of CO₂ in the 5.3 L container at 101 kPa and 280 K is 10.1 grams of CO₂

The mass in grams of CO₂ can be calculated using the Ideal Gas Law equation:

where:

P is pressure = 101 kPa or 0.998 atm

V is volume = 5.3 L

n is the number of moles of gas = ?

R is the molar gas constant = 0.08206 L·atm/(mol·K)

T is the temperature = 280 K

solving for n;

n = PV/(RT)

n = (0.998 atm * 5.3) /(0.08206 * 280 K)

n = 0.229 moles of CO₂

Mass of CO₂ = number of moles * molar mass

molar mass of CO₂ = 44.01 g/mol

mass of CO₂ =  0.229 × 44.01

mass of CO₂ = 10.1 g

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If the weather seems to have a constant pattern that has barely been or has not been changed, you can assume that there will be a greater chance the weather pattern will remain constant, or at least similar to the pattern.

The volume of the air when the breath is warm to body temperature (37.0°C) in the lungs is 530.4 mL

First, we shall list out the given parameters from the question. This is given below:

The volume of the breath when it is warm to body temperature (37.0°C)    can be obtained by using Charles' law equation as shown below:

V₁ / T₁ = V₂ / T₂

450 / 263 = V₂ / 310

Cross multiply

263 × V₂ = 450 × 310

263 × V₂ = 139500

Divide both side by 263

V₂ = 139500 / 263

V₂ = 530.4 mL

Thus, the volume is 530.4 mL

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The balanced equation is: Pb(C2H3O2)2 + CO2 + H2O → PbCO3 + 2 HC2H3O2

In a balanced chemical equation, the number of atoms of each element is the same on both sides of the equation. Thus, the balanced equation of the reaction is:

Pb(C2H3O2)2 + CO2 + H2O → PbCO3 + 2 HC2H3O2

The coefficients used to balance the equation are:

1 Pb(C2H3O2)2 + 1 CO2 + 1 H2O → 1 PbCO3 + 2 HC2H3O2

After balancing the equation, we can see that one molecule of lead(II) acetate reacts with one molecule of carbon dioxide and one molecule of water to produce one molecule of lead(II) carbonate and two molecules of acetic acid.

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Cutting or tearing a strip of cardboard sufficiently large to entirely enclose the Styrofoam cup's mouth. This is the modification for making on the coffee cup calorimeter.

A coffee cup calorimeter without a cover serves as the basic component of a coffee cup calorimeter. A thermometer with its bulb below the water's surface can be inserted through the cup's lid after the cup has been partly filled using an established quantity of water.

The quantity of heat that was either absorbed or generated  throughout the reaction is determined using the alteration in water temperature. Cutting or tearing a strip of cardboard sufficiently large to entirely enclose the Styrofoam cup's mouth. This is the modification for making on the coffee cup calorimeter.

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Polysaccharides can be differentiated from monosaccharides by enzymatic assays.

When I hear the term aromaticity what comes to my mind is the Huckel rule. In accordance with the Huckel rule, for a compound to be aromatic, then the compound must have to contain 4n + 1 number of pi elecryons of which benzene satisfies by having 6 pi electrons in its molecular orbital.

Peptides, which are chains of amino acids joined together by peptide bonds, are created when amino acids interact with one another through peptide bonds.

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The new temperature of the neon gas, with a volume held constant, is approximately -253.6°C.

Gay-Lussac's law states that the pressure exerted by a given quantity of gas varies directly with the absolute temperature of the gas.

It is expressed as;

P₁/T₁ = P₂/T₂

Given that:

Plug the given values into the above formula and solve for the final temperature.

P₁/T₁ = P₂/T₂

P₁T₂ = P₂T₁

[tex]T_2 = \frac{P_2T_1}{P_1}\\ \\ P_2 = \frac{ 0.2 * 293.15}{3}\\ \\P_2 = 19.543 K[/tex]

Now, convert from Kelvin to celsius

P₂ = 19.543K − 273.15

P₂ = -253.6°C

Therefore, the new temperature is -253.6°C.

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The three main components of electrolytic cells are cathode, anode and electrolyte. The negatively charged electrolytic cells are cathode and the positively charged electrolytic cells are anode.

An electrolytic cell can be defined as the electrochemical device which uses the electrical energy to perform a non-spontaneous redox reaction. They are mainly used for the electrolysis of certain compounds.

Here the anode cell is:

3H₂O (l) + I⁻ (aq) → IO⁻₃ (aq) + 6e⁻ + 6H⁺ (aq)

cathode cell is:

14H⁺ (aq) + Cr₂O₇²⁻ (aq) + 6e⁻ → 2Cr³⁺ (aq) + 7H₂O (l)

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In an ecosystem, the best method  for the preservation of water quality is  that humans should cease all recreational and agricultural uses of water resources.

Ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other through nutrient cycles and flow of energy.

Energy enters the system through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other. Components present include air, water, soil,etc.

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Reactivity is the propensity of an element to gain or lose electrons. The most reactive metals are alkaline metals.

Reactivity in chemistry is an indication of how easily a substance reacts chemically. The chemical may react on itself or with other atomic particles or compounds, and in either case, energy will typically be released. The most reactive substances and elements have the potential to spontaneously or explosively ignite.

Periodic trends (patterns in the Periodic Table) can be used to anticipate an element's reactivities. Let's begin with cyclical tendencies. Reactivity is the propensity of an element to gain or lose electrons. The most reactive metals are alkaline metals (Group 1) because they have the highest propensity to lose electrons.

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51.4 mL is the  volume in mL of 0.727 MCa(OH)₂  needed to neutralize 22.8 mL of 0.390 M H₃PO₄  in a titration.

A measurement of three-dimensional space is volume. It is frequently expressed in numerical form using SI-derived units or different imperial or US-standard units (such the gallon, quart, and cubic inch). Volume and length (cubed) have a symbiotic relationship.

The volume much a container is typically thought of as its capacity, not as the amount of space it takes up. In other words, the volume is the volume of fluid (liquid or gas) that the container may hold.

2H₃PO₄ + 3Ca(OH)₂ —> Ca₃(PO₄)₂ + 6H₂O

MaVa / MbVb = nA / nB

( 0.390  ×  22.8) / (0.727 × Vb) = 2/3

Vb = 51.4 mL

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When a jar containing saline solution is exposed to sunlight, its liquid content gradually diminishes and eventually forms crystals as a result of the evaporation process.

The energy from the sun's heat accelerates the movement of molecules in saltwater, which leads to their subsequent release from the liquid surface as water vapor. As a result of this process, the moisture transforms into gas and ascends, scattering throughout the atmosphere.

The concentration of salt in the remaining liquid increases as water evaporates from saltwater, as salt is unable to evaporate like water. As time passes, the salt concentration within the water triples to a point where it becomes incapable of remaining dissolved and commences the process of crystal formation.

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The percent ammonium in the new solution is 80ppm

The concentration of a compound like NaCl (sodium chloride) refers to the quantity of matter that is included in a specified amount or mass of solution.

This magnitude can be expressed through various units, comprising of molarity (moles of the material per liter of liquid), molality (moles of the part per kilogram of solvent), mass/volume percent (mass of the element per volume of fluid), and parts per million (ppm).

For instance, a fluid of NaCl with an intensity of 0.1 M (0.1 moles of NaCl per liter of solution) contains 58.44 grams of NaCl for every liter of water, whereas a concoction with an intensity of 1% (mass/volume percent) comprises 10 grams of NaCl per 100 ml of fluid.

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Answer:

Explanation:

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Equilibrium in a chemical reaction is the state of a system in which the rate of the forward reaction is equal to the rate of the reverse reaction.

In a chemical reaction, chemical equilibrium is the state in which both the reactants and products are present in concentrations which have no further changes.

According to this question, the reactants (blue line) equates the products (red line) in the time, T2.

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