what is the name of p214

The volume of potassium iodide used will be 0.087 L or 87 mL

The equation of the reaction goes thus: [tex]Pb(NO_3)_2(aq) + 2KI --- > PbI_2(s) + 2KNO_3(aq)[/tex]

The mole ratio of the 2 reactants is 1:2.

Mole of 9.42 g [tex]Pb(NO_3)_2[/tex] = 9.42/331.2 = 0.02844 mol

Equivalent mole of KI = 0.02844 x 2 = 0.05688 mol

Volume of 0.05688 mol, 0.655 mol/L KI = 0.05688/0.655 = 0.087 L or 87 mL

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The equation for the dissociation of iron (iii) nitrate is given below:

A dissociation equation is an equation in which a compound separates into the constituent ions present in the compound.

The equation for the dissociation of iron (iii) nitrate is given below:

Fe₂(NO₃)₃ (aq) ⇄  2 Fe⁺ (aq) + 3 NO₃⁻ (aq)

In conclusion, the dissociation of iron(iii) nitrate produces iron (ii) ions and nitrate ions.

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The formula form of the chemical reactions are given as follows:

A chemical equation is an equation which uses the symbols of elements to show the reaction that occur between substances to form products.

The formula form of the chemical reactions are given as follows:

In conclusion, the chemical reactions are represented by the equations.

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Answer:

4 NH₃ + 3 O₂ -----> 2 N₂ + 6 H₂O

Explanation:

An equation is balanced when there is an equal amount of each element on both sides of a reaction. To balance the elements, you can add coefficients to modify the amount of elements/molecules present. It is important to have the smallest coefficients possible.

The unbalanced equation:

NH₃ + O₂ -----> N₂ + H₂O

Reactants: 1 nitrogen, 3 hydrogen, 2 oxygen

Products: 2 nitrogen, 2 hydrogen, 1 oxygen

The balanced equation:

4 NH₃ + 3 O₂ -----> 2 N₂ + 6 H₂O

Reactants: 4 nitrogen, 12 hydrogen, 6 oxygen

Products: 4 nitrogen, 12 hydrogen, 6 oxygen

Answer:

3.88kg

Explanation:

weight=mass_of_body(m) x acceleration_due_to_gravity(g)

The weight is given and acceleration is also give

For mass divide the weight by acceleration.

Answer:

Explanation:

:Determination of total calcium and magnesium Ion concentration

Answer:

Ca2+ ions react to form a stronger complex with the EDTA

Explanation:

As a result, when the calcium ion–PR complex is titrated with EDTA the Ca2+ ions react to form a stronger complex with the EDTA. For the titration, the indicator is added to the sample solution containing the calcium ions and forms the pink/red calcium ion-indicator complex (Ca-PR).

The mass of melted gold to release the energy would be  3, 688. 8 Kg

The formula for quantity of energy is given thus;

Q = n × HF

Where n represents number of moles

HF  represents  heat of fusion

To find the number of moles, we have

235.0 = n × 12.550

number of moles = [tex]\frac{235}{12. 550}[/tex] = 18. 725 moles

Note that molar mass of Gold is 197g/ mol

Let's note that;

Number of moles = mass/ molar mass

Mass = number of moles × molar mass

Mass = 18. 725 × 197

Mass = 3, 688. 8 Kg

Thus, the mass of melted gold to release the energy would be  3, 688. 8 Kg

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Taking into account definition of percent yield, the percent yield for the reaction is 84.88%.

In first place, the balanced reaction is:

2 Al + 3 H₂SO₄ → Al₂(SO₄)₃ + 3 H₂

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:

Then, 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 54 grams of aluminium form 342 grams of aluminium sulfate, 14 grams of aluminium form how much mass of aluminium sulfate?

[tex]mass of aluminium sulfate=\frac{14 grams of aluminium x342 grams of aluminium sulfate}{54 grams of aluminium}[/tex]

mass of aluminium sulfate= 88.67 grams

Then, 88.67 grams of aluminium sulfate can be produced if 14.0 g of aluminium reacts with excess sulfuric acid.

The percent yield is the ratio of the actual return to the theoretical return expressed as a percentage.

The percent yield is calculated as the experimental yield divided by the theoretical yield multiplied by 100%:

[tex]percent yield=\frac{actual yield}{theorical yield} x100[/tex]

where the theoretical yield is the amount of product acquired through the complete conversion of all reagents in the final product, that is, it is the maximum amount of product that could be formed from the given amounts of reagents.

In this case, you know:

Replacing in the definition of percent yields:

[tex]percent yield=\frac{75.26 grams}{88.67 grams} x100[/tex]

Solving:

percent yield= 84.88%

Finally, the percent yield for the reaction is 84.88%.

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The product of pressuré and volume of an ideal gas is proportional to the absolute temperature.

An ideal gas is a gas that is not real in nature. It is a hypothetical gas that obeys the ideal gas law.

Just like normal gas particles, the particles of an ideal gas also move randomly. However, unlike normal gas molecules, the molecules of an ideal gas do not interact with one another.

The ideal gas law states that the product of the pressure and the volume of a gas is proportional to the temperature of the gas.

Mathematically, the ideal gas equation is expressed as:

PV = nRT where n = number of mole of the gas and R = constant.

Thus, the best conclusion from the ideal gas law is the product of pressure and volume is directly proportional to the temperature.

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All elements have a AHf, of 0

kJ/mole at standard temperature and pressure.

An element can be defined as a substance which cannot be split into two or more simpler forms by an ordinary chemical process

Below are the list of the first twenty elements:

So therefore, all elements have a AHf, of 0

kJ/mole at standard temperature and pressure.

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The thing that will happen to mangroves if nearby a coral reefs are destroyed is that:

The destruction that is known to have taken place in mangrove forests in the area of the coastal wetlands is known to be one that is highly  depleting the amount of natural tannins in the water.

Due to the above, this is known to have subjected the close by coral reefs to have what we call an undue UV radiation. Its effect is that the reefs are said to be sunburned a lot and then the coral bleaching takes place.

Therefore, The thing that will happen to mangroves if nearby a coral reefs are destroyed is that Option C: Reefs will receive less sunlight due to increased turbidity in the water.

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The equation that conforms with the particle model is 4C + 6O2 ----> 4CO2 + 2O2.

The term chemical reaction has to do with the combination of substances to give products. We know that reactants and products must follow the law of conservation of mass.

Hence, the equation that conforms with the particle model is 4C + 6O2 ----> 4CO2 + 2O2.

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The correct order is 1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 4d, 4f. The correct option is B.

The correct order of energy sublevel is 1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d, 5p, 6s, 4f, 5d, 6p, 7s, 5f, 6d, 7p.

Thus, with the exclusion of 5s, 5p, 6s, 5d, 6p, 7s, 5f, 6d, and 7p, what we have left in order of increasing energy is 1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 4d, 4f.

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The correct order from least to greatest energy for the energy sublevels is;  1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 4d, 4f (Option B).

The Aufbau principle offers a method in which the energy levels in an atoms are arranged from the least to the greatest. We know that electrons are filled into orbitals in order of increasing energy.

Thus, the correct order from least to greatest energy for the energy sublevels is;  1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 4d, 4f (Option B).

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Answer:

C.) 109.9 g/mol

Explanation:

The molar mass is the sum of each element's atomic weight times their quantity. There is one atom of each element unless denoted by subscripts.

Atomic Mass (Li): 6.9410 g/mol

Atomic Mass (S): 32.065 g/mol

Atomic Mass (O): 15.998 g/mol

Molar Mass (Li₂SO₄): 2(6.9410 g/mol) + 32.065 g/mol + 4(15.998 g/mol)

Molar Mass (Li₂SO₄): 109.939 g/mol

Answer:

539 mmHg

Explanation:

Using Boyle's Law,

(588)(924)=(1008)(pressure)

So, the pressure is 539 mmHg.

The true statements are:

Energy is the ability to do work.

Energy can exist in many form, two of which are kinetic and potential energy.

The worker is holding a filled gas cylinder still gives the gas potential energy by lifting it above the ground.

The molecules of the gas also has kinetic energy by virtue of their constant random motion resulting in thermal energy.

In conclusion, the energy of the filled gas is both potential and kinetic.

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The freezing point depression of a solution that contains 2 moles of NaCl in 200 g of water (Kf = 1.86 °C/m) is 18.6 °C.

It is a decrease in the freezing point of a solution, in comparison with the pure solvent.

The solution contains 2 moles of NaCl in 200 g of water.

b = moles NaCl / Kg water = 2 mol/0.200 kg = 10 m

Given the cryoscopic constant (Kf) is 1.86 °C/m for water, the freezing point depression (ΔT) is:

ΔT = Kf × b = 1.86 °C/m × 10 m = 18.6 °C

The freezing point depression of a solution that contains 2 moles of NaCl in 200 g of water (Kf = 1.86 °C/m) is 18.6 °C.

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The resulting solution will be neutral having a pH of 7.

The term pH is defined as the hydrogen ion concentration in solution. We know that the pH is inversely related to the hydrogen ion concentration in solution.

We know that the reaction between an acid and a base produced a salt. In this case, the salt that is produced is neutral because the acid is completely reacted with the base.

Since the solution contains a mixture of a  containing pH of 3.5 and that of a pH of 10.5, the resulting solution will be neutral having a pH of 7.

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Answer:

0.875 moles solute

Explanation:

You can find the moles of the solute using the molality ratio:

Molality = moles solute / mass (kg) solution

After converting the mass to kilograms, you can plug the values into the ratio and simplify to find the moles.

1,000 g = 1 kg

  350 g              1 kg
--------------  x  ---------------  =  0.35 kg solution
                        1,000 g

Molality = moles solute / mass solution

2.5 m = moles solute / 0.35 kg

0.875 = moles solute

Answer:

A.) NF₃

D.) ClO₃⁻

Explanation:

To determine the molecular shape of the molecules, you need to:

1.) Calculate the total valence electrons in the molecule

    -----> The sum of the element's valence electrons

2.) Draw the Lewis structure

Elements cannot be broken down into simpler substances by any or series of chemical reactions.

A compound can be broken done by chemical reactions

An element can be defined as species of atoms having a certain number of protons in their nuclei and pure substance of that species.  

Elements cannot be broken down into simpler substances by any or series of chemical reactions.

A compound can be defined as a chemical substance  that is composed of numerous identical molecules containing atoms from more than one element and held together by chemical bonds.

A compound can be broken done by chemical reactions

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51.3 gram of water should form if 32.5 g of NH₃ react with enough oxygen.

To calculate the number of moles use the formula

Number of moles = [tex]\frac{\text{Given Mass}}{\text{Molar Mass}}[/tex]

                              = [tex]\frac{32.5}{17}[/tex]

                              = 1.9 mol

4NH₃ + 5O₂ → 4NO + 6H₂O

4 mol of NH₃ react with oxygen to given 6 mole of water.

So 1.9 mol of NH₃ produces = [tex]\frac{1.9}{4}\times 6[/tex]

                                              = 2.85 mol of water

Mass of water = Molar Mass of water × Number of moles of water

                        = 18 × 2.85

                        = 51.3 gram

Thus from the above conclusion we can say that 51.3 gram of water should form if 32.5 g of NH₃ react with enough oxygen.

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The fact that uranium is a radioactive element is a chemical property. Details about radioactivity can be found below.

Radioactivity is the spontaneous emission of ionizing radiation as a result of a nuclear reaction.

Radioactivity, which is the emission of particles from an unstable nucleus, is a chemical property.

Therefore, it can be said that the fact that uranium is a radioactive element is a chemical property.

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Answer: 1413.39 inches

Explanation:

Formula for converting meters to inches

Meters x 39.37 (roughly) = Value in inches

Applying formula

35.9 meters x 39.37 = 1413.39 inches (roughly)

Answer:

1

Explanation:

The empirical formula describes the simplest whole number ratio of each type of atom in a compound. To find this formula, you need to (1) convert grams of each element to moles (via their atomic masses) and then (2) find the ratio of each element (by dividing each molar value by the smallest mole value).

(Step 1)

Atomic Mass (Zn): 65.380 g/mol

Atomic Mass (C): 12.011 g/mol

Atomic Mass (O): 15.998 g/mol

10.40 grams Zn              1 mole
------------------------  x  ------------------------  =  0.159 moles Zn
                                   65.380 grams

1.92 grams C               1 mole
---------------------  x  -----------------------  =  0.160 moles C
                                 12.011 grams

7.68 grams O               1 mole
----------------------  x  ------------------------  =  0.480 moles O
                                 15.998 grams

(Step 2)

0.159 moles Zn / 0.159  =  1 atom Zn

0.160 moles C / 0.159  =  1 atom C

0.480 moles O / 0.159  =  3 atom O

The empirical formula is Zn₁C₁O₃. Therefore, the value that should be in the space is 1.

Answer:

A. Semi Permeable.

Explanation:

Cell membranes are semi permeable.

0.3268 moles of PC15 can be produced from 58.0 g of Cl₂ (and excess

P4).

The mole, symbol mol, exists as the SI base unit of the amount of substance. The quantity amount of substance exists as a measurement of how many elementary entities of a provided substance stand in an object or sample.

The balanced chemical equation is

[tex]P_{4} + 10Cl_{2} = 4PCl_{5}[/tex]

The mass of clorine is m([tex]Cl_{2}[/tex]) = 58.0 g

The amount of clorine is n([tex]Cl_{2}[/tex]) = m([tex]Cl_{2}[/tex])/M([tex]Cl_{2}[/tex]) = 58/70.906 = 0.817 mol

The stoichiometric reaction,shows that

10 moles of [tex]Cl_{2}[/tex] yield 4 moles of [tex]PCl_{5}[/tex];

0.817 of [tex]Cl_{2}[/tex] yield x moles of [tex]PCl_{5}[/tex]

n([tex]PCl_{5}[/tex]) = 4*0.817/10 = 0.3268 mole

0.3268 moles of PC15 can be produced from 58.0 g of Cl₂ (and excess

P4).

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Taking into account the definition of dilution, the concentration of the new solution is 1 mol/L.

When it is desired to prepare a less concentrated solution from a more concentrated one, it is called dilution.

Dilution is the process of reducing the concentration of solute in solution, which is accomplished by simply adding more solvent to the solution at the same amount of solute.

In a dilution the amount of solute does not change, but as more solvent is added, the concentration of the solute decreases, as the volume (and weight) of the solution increases.

A dilution is mathematically expressed as:

Ci×Vi = Cf×Vf

where

In this case, you know:

Replacing in the definition of dilution:

6 mol/L× 200 mL= Cf× 1200 mL

Solving:

(6 mol/L× 200 mL)÷ 1200 mL= Cf

1 mol/L= Cf

In summary, the concentration of the new solution is 1 mol/L.

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