Balance the equation C7H9+HNO3 >>C7H6(NO2)3+H2O
Helpp

46. Covalent bonds are formed by sharing electrons between atoms.

Covalent bonds are chemical bonds formed when two atoms share electrons. They occur between nonmetal atoms and involve the sharing of electron pairs, resulting in the formation of a stable molecule. Covalent bonds are typically found in molecular compounds.

47. Ionic bonds are formed by gaining or losing electrons between metals and nonmetals.

48. A subscript is used in a formula to indicate the number of atoms of an element in a compound.

49. Chemical reactivity or stability depends on the number of outer energy levels (valence shells) in atoms.

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Answer:

Green.

Explanation:

Only the particles that hit the nucleus of the atom bounced off.

The two chemical compounds are not the same, because their ratio is not equal. In both samples the composition of lead and oxygen is different.

A chemical compound is a substance made of numerous similar molecules (or molecular entities) joined by chemical bonds and comprising atoms from various chemical elements. Therefore, a molecule made up of only one type of atom is not a compound. Chemical reactions, which may entail interactions with other molecules, can change a compound into a distinct substance. Atomic bonds may be broken or new ones created during this process.

sample 1 = mass of lead / mass of oxygen = 12.92g/2g = 6.46 .

sample 2 = mass of lead/ mass of oxygen = 34.27 - 14.39/14.39 = 1.38 .

so, the ratios are not the same.

Hence, the two chemical compounds are not the same, because their ratio is not equal. In both samples the composition of lead and oxygen is different.

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In the image we can see that there are 1 phosphorus (P4) molecules and 7 fluorine molecules.

According to the stoichiometry of the reaction, one molecule of phosphorus (P4) and 6 molecules of fluorine (F2) are needed to form 4 molecules of PF3.

The answer is:

The limiting reagent is phosphorus (P4)

The number pf PF3 molecules formed is 4 and

The number of fluorine atoms/molecules in excess is 1.

The volume of the alcohol can be obtained as 79.9 mL.

We know that there are many different unit of concentration. The unit of concentration that we are going to focus on here is the volume per volume percent. This has to do with the volume of solute in a given volume of the solvent.

Thus we have;

Volume solution = 355 mL

Volume percent of the alcohol =  22.5%

Actual volume of the alcohol = x

We now have;

Volume percent = Volume of the alcohol (x)/volume of the solution * 100/1

22.5 = x/355 * 100/1

22.5 =  100x/355

x = 22.5 * 355/100

x = 79.9 mL

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Missing parts;

A mouthwash contains 22.5% (v/v) alcohol. If the bottle of mouthwash contains 355 mL, what is the volume, in milliliters, of alcohol

Answer:

000.19900010

Explanation:

divide the number of times the event occurs by the length of time. Example: Anna divides the number of website clicks (236) by the length of time (one hour, or 60 minutes)

Answer:

D NO3 Nitrate is a nitrogen oxoanion formed by loss of a proton from nitric acid.

Answer: I think the answer is 2.

Explanation:

Answer:

The tension in the string is 78.73 N.

Explanation:

The tension in the string can be determined from the expression;

v = \(\sqrt{\frac{T}{m} }\)

where: v is the speed of the wave in the sting, T is the tension in the string and m is the mass per unit length of the sting.

Given that: v = 16.2 m/s, and m = 0.3 kg/m.

Then;

16.2 = \(\sqrt{\frac{T}{0.3} }\)

Square both sides to have,

\((16.2)^{2}\) = \(\frac{T}{0.3}\)

T = \((16.2)^{2}\) x 0.3

  = 252.44 x 0.3

  = 78.732

T = 78.732 N

The tension in the string is 78.73 N.

Answer:

39.119 g

Explanation:

1 mole of S has 32.065 g

=> 1.22 x 32.065 = 39.1193 or 39.119 g

Answer:

It must have sunlight and water and neutrants and be fertilized

Explanation:

• The following quantum numbers describes the shape of an orbital:

• angular quantum number

Reason : The subdivision of the electronic shell generates the subshell, thus, a set of numbers, called quantum numbers is needed to thoroughly explain an electronic configuration and the location of an electron in an atom.

The maximum amount of AlCl₃ that was produced during the experiment is 3 moles of AlCl₃.

The equation of the reaction between aluminum nitrate and sodium chloride is given below:

Al(NO₃)₃ + 3 NaCl ---> AlCl₃ + 3 NaNO₃

The maximum amount of AlCl₃ that was produced is calculated as follows:

The mole ratio of the reaction is 1 : 3 : 1 : 3

The limiting reactant is sodium chloride

3 moles of NaCl produce 1 mole of AlCl₃

9 moles of NaCl will produce 1/3 * 9 mole of AlCl₃ = 3 moles of AlCl₃

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When chlorine react in ionic form, it gain one electron as its electronegativity is very high. chlorine form mostly ionic compound.

An atom or molecule is said to be an ion if a number of its electron pairs have been acquired or lost, giving it a net negative or positive electrical charge.

In other terms, a chemical species has an unbalanced ratio of proton (positively charged particles) to electrons (negatively charged particles). When chlorine react in ionic form, it gain one electron as its electronegativity is very high. chlorine form mostly ionic compound.

Therefore, when chlorine react in ionic form, it gain one electron as its electronegativity is very high.

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After precipitation falls, the water moves into the lithosphere through openings in the rock or soil. This process is called percolation.

Therefore, Option C is the correct option.

Evaporation is defined as the process of conversion of liquid into vapours.

For example: Conversation of water into water vapours.

But int he question, there is no conversion. So this option is incorrect option.

Sublimation is the process of conversion of solid directly into the vapour phase

Since, there is no conversion of of solid into vapours. So, this option also incorrect option.

Mineralization is defined as the process through which chemicals which is present in organic matter are decomposed or oxidized easily in the available forms to plants.

As there is no decomposition of minerals. So, this is also incorrect option.

Percolation is defined as the process in which liquid slowly allow to pass through a filter.

So, this is correct option.

Thus, we concluded that the water moves into the lithosphere through openings in the rock or soil. This process is called percolation.

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Answer:

Phosphorus would be the correct answer I guess

answer: The burning of fossil fuels leads to climate change so the correct answer is option D

Explanation: Burning fossil fuels releases a large amount of co2 into the atmosphere. C02 is a greenhouse gas so it traps the sun's heat this, in turn, heats up our atmosphere which leads to climate change.

now option B is wrong because the ozone layer is depleted due to ozone-depleting substances which when it comes to contact with ozone damage it and option c is due to human activities

finally, option d is due to climate change and this is an indirect effect of burning fossil fuels.

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Answer:

CH3CH2CH3

Explanation:

Dipole moment is the measure of the polarity of a chemical bond. It is the extent of charge separation in a molecule.

Dipole moment is the product of the magnitude of charge and the distance separating the charges from each other.

The molecule having the lowest dipole moment among the options is the molecule that has the least polarity. The least polar molecule among the options is CH3CH2CH3, it has no polar bonds in its structure.

We have that for the Question "Identify the compound with the lowest dipole moment. Identify the compound with the lowest dipole moment. CH3CH2CH3 CH3OCH3 CH3CHO CH3OH CH3CN "

it can be said that

 From the question we are given

CH3CH2CH3

CH3OCH3

CH3CHO

CH3OH

CH3CN

Generally alkanes have the lowest dipole moment, they have C-H bond which are non polar.

Therefore,

\(CH_3CH_2CH_3\) have the lowest dipole moment

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At equilibrium, the number of moles of \(Cl_2\) (g) will be 0.2025 mol.

1: Write the balanced chemical equation:

\(C_O\)(g) + \(Cl_2\)(g) ⟶ \(C_OCl_2\)(g)

2: Set up an ICE table to track the changes in moles of the substances involved in the reaction.

Initial:

\(C_O\)(g) = 0.3500 mol

\(Cl_2\)(g) = 0.05500 mol

\(C_OCl_2\)(g) = 0 mol

Change:

\(C_O\)(g) = -x

\(Cl_2\)(g) = -x

\(C_OCl_2\)(g) = +x

Equilibrium:

\(C_O\)(g) = 0.3500 - x mol

\(Cl_2\)(g) = 0.05500 - x mol

\(C_OCl_2\)(g) = x mol

3: Write the expression for the equilibrium constant (Kc) using the concentrations of the species involved:

Kc = [\(C_OCl_2\)(g)] / [\(C_O\)(g)] * [\(Cl_2\)(g)]

4: Substitute the given equilibrium constant (Kc) value into the expression:

1.2 x \(10^3\) = x / (0.3500 - x) * (0.05500 - x)

5: Solve the equation for x. Rearrange the equation to obtain a quadratic equation:

1.2 x \(10^3\) * (0.3500 - x) * (0.05500 - x) = x

6: Simplify and solve the quadratic equation. This can be done by multiplying out the terms, rearranging the equation to standard quadratic form, and then using the quadratic formula.

7: After solving the quadratic equation, you will find two possible values for x. However, since the number of moles cannot be negative, we discard the negative solution.

8: The positive value of x represents the number of moles of \(Cl_2\)(g) at equilibrium. Substitute the value of x into the expression for \(Cl_2\)(g):

\(Cl_2\)(g) = 0.05500 - x

9: Calculate the value of \(Cl_2\)(g) at equilibrium:

\(Cl_2\)(g) = 0.05500 - x

\(Cl_2\)(g) = 0.05500 - (positive value of x)

10: Calculate the final value of \(Cl_2\) (g) at equilibrium to get the answer.

Therefore, at equilibrium, the number of moles of \(Cl_2\) (g) will be 0.2025 mol.

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The volume = 309.04 ml

Given

Specific gravity=-1.28 and strength =24.7% by mass of H₂SO₄

mass 125g of ZnC0₃

Required

The volume of H₂SO₄ Solution

Solution

Reaction

ZnCO₃ + H₂SO₄ → ZnSO₄ + CO₂ + H₂O

mol of ZnCO₃(MW=125.4 g/mol) :

\(\tt mol=\dfrac{125}{125.4}=0.997\)

From equation, mol ZnCO₃ : H₂SO₄= 1 : 1 so mol H₂SO₄=0.997

mass of H₂SO₄ (MW=98 g/mol) :

\(\tt mass=mol\times MW=0.997\times 98=97.706~g\)

mass of solution :

\(\tt \dfrac{100}{24.7}\times 97.706=395.57~g\)

Volume of solution :(density of solution=1.28 g/ml for the reference substance is water(density=1 g/ml)

\(\tt V=\dfrac{395.57}{1.28}=309.04~ml\)

Answer:

the answer is A

I made a chart for AP chem if you want to refer to it.

The reaction that has a positive change in entropy

spontaneous will be " At all temperatures for exothermic reactions".

A spontaneous reaction is one where the production of products is favored under the conditions of the reaction.

A reaction wherein energy will be emitted in the term of light as well as heat has been known as that of an exothermic reaction.

The free energy change will always be negative and even the reaction has always been spontaneous if such reaction was exothermic (H equals negative) as well as the entropy S was positive.

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The Two Aspects of Science: Control over nature and understanding of nature must both be held in equal honor.

Answer:

i hope u find what your looking for

The number of mole in 1.06×10²³  atoms of tungsten is 0.176 mole

The following data were obtained from the question:

The number of mole that contains 1.06×10²³  atoms of tungsten can be obtained as illustrated below:

From Avogadro's hypothesis,

6.022×10²³ atoms = 1 mole of substance

Thus, we can say that

6.022×10²³ atoms = 1 mole of tungsten

Therefore,

1.06×10²³  atoms = (1.06×10²³  atoms × 1 mole) / 6.022×10²³  atoms

1.06×10²³  atoms = 0.176 mole of tungsten

Thus, we can conclude from the above calculation that the number of mole is 0.176 mole

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By a redox reaction that involves the transfer of electrons, often through the dissolution of an ionic substance, electrochemical cells produce electricity from the flow of electrons.

In electrochemistry, redox or oxidation-reduction reactions, in which electrons travel from one element to another, can produce electricity. Redox processes involve the transfer of electrons from one substance to another.

Batteries use a very significant class of oxidation and reduction reactions to produce useable electrical energy. Using solutions of respective sulphates, copper and zinc metals can be combined to create a straightforward electrochemical cell.

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Step 1

Avogadro's number states that:

1 mole of C3H8 = 44.11 g of C3H8 = 6.02x10^23 formula units (molecules in this case)

---------

Step 2

Information provided:

2.37 g C3H8

The molar mass = 44.11 g/mol

---------

Step 3

Procedure:

44.11 g C3H8 ---------- 6.02x10^23 molecules of C3H8

2.37 g C3H8 ---------- X

X = 2.37 g C3H8 x 6.02x10^23 molecules of C3H8/44.11 g C3H8

X = 3.23x10^22 molecules of C3H8

Answer: Please, revise your options because I cannot find any mistake in my procedure. (Ask your teacher, please)

I found 3.23x10^22 molecules of C3H8 but there is no option alike.

Answer: by boiling it

Explanation:

By boiling the sap to remove water, also to concentrate the sugar that makes maple syrup.

The information provided tells us that the peptide sequence contains a histidine residue at some position.

This information indicates that the peptide sequence contains a histidine residue, which is covalently modified by FDNB to form 2,4-dinitrophenylhistidine. The fact that the histidine residue is modified by FDNB suggests that it is in the free amino form, rather than being part of an amide or guanidino group.

This is because FDNB reacts with free amino groups, but not with amido or guanidino groups. The presence of a histidine residue in the peptide sequence can provide information about the functional and structural properties of the peptide, as histidine is known to play important roles in protein structure and function.

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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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