when 157.0 mg of eugenol are dissolved in enough olive oil to make a 100 ml solution, a 9.562 mm solution is made. provide the molecular formula of eugenol.

Answer: 1) The answer is: c) protons and neutrons.

2) The answer is: a) electrons.

Explanation:

To see the number of atoms of an element in a given molecule we need to multiply stoichiometry to the number that is written on the foot of the element that is stoichiometry. Therefore, Much of the mass of an atom is concentrated in its nucleus. The nucleus contains  protons and neutrons and the outer part of the atom contains  electrons.

Atom is the smallest particle of any element, molecule or compound. Atom can not be further divided. Atoms contains nucleus in its center and electron that revolve around the atom in fixed orbit. Electron has -1 charge while proton has +1 charge. Neutron is neutral.

Much of the mass of an atom is concentrated in its nucleus. The nucleus contains  protons and neutrons and the outer part of the atom contains  electrons.

Therefore, much of the mass of an atom is concentrated in its nucleus. The nucleus contains  protons and neutrons and the outer part of the atom contains  electrons.

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If the daily value for Ca is 1500 mg, the number of Tums tablets needed by older women each day would be  7.5 tablets.

Calcium carbonate consists of calcium and carbonate ions as follows:

\(CaCO_3 -- > Ca^{2+} + CO_3^{2-}\)

Thus, for every 1 mole of calcium carbonate, 1 mole of calcium is involved.

Recall that: mole = mass/molar mass

500 mg of calcium carbonate would be equivalent to:

0.5/100 = 0.005 mol

The equivalent mole of calcium would also be 0.005 mol.

5 mol of calcium would be equivalent to:

0.005 x 40 = 0.2 grams or 200 mg of calcium.

This means that 1 Tums tablet, contains 200 mg of calcium. But 1500 mg is needed daily.

1500/200 = 7.5

This means that older women will need to take 7.5 tablets of Tums per day in order to meet up with the daily calcium requirement of 1500 mg.

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56 ml of water is displaced on submerging a book having volume of 56 cm³.

If a body is considered which is completely submerged, the volume which it will displace will be equal to volume of the body.If it is partially submerged,volume of fluid displaced will be equal to the volume of the part which is submerged.This is in accordance with the Archimedes' principle.

The Archimedes' principle can be stated as the upward buoyant force which is exerted on a body irrespective whether the body is partially or fully submerged  is equal to the weight of fluid which is displaced by it.

Thus,56 cm³ of water will be displaced on submerging the book into water as the book will be completely submerged.

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The increase in the atomic number increases the frequency and spectral lines in the spectrum. The addition of the number of electrons and energy increases the lines of the emission spectrum.

Spectrum has been defined as the light colors emitted by the atom of varying frequencies and wavelengths. The electron has been known to travel from lower to higher energy levels. This leads to the emission of light.

According to the principal quantum number, the addition of the electrons increases the energy and in turn, increases the lines of spectrum emission.

Therefore, the atom number directly relates to the spectrum line.

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Answer:

picture plz

Explanation:

Answer:

A. The reactants are changed to form the products.

Explanation:

Chemical reactions are reactions that involves a change in the chemical composition of substances involved while a nuclear reaction is the process of fusing together or splitting the nucleus of an atom. According to this question, matter is said to undergo both types of reaction.

However, one similarity in both chemical and nuclear reactions is that substances called REACTANTS are changed to form PRODUCTS. In nuclear reaction, the atoms joined or split are the reactants while the ones formed are the products.

Answer: A

Explanation:

To combine ions to form ionic compounds, we need the combine in such a way that it gets neutral charge.

We can combine each anion with each cation to get the 4 compounds we need.

To combine SO₄²⁻ with Pb⁴⁺ we first find the Least Common Multiple of their charges, 2 and 4.

They have the factor 2 in common, so the LCM is 4. This is the final charge of each that will cancel out.

To get 4+, we only need 1 Pb⁴⁺.

To get 4-, we need 2 SO₄²⁻.

So, the formula is:

Pb(SO₄)₂

To combine SO₄²⁻ with NH₄⁺ is easier because one of them has single charge. In this case, we can simply pick one of the multiple charge ion and the same amount that will cancel its charge of the single charged one.

So, we picke 1 SO₄²⁻, ending with 2-.

And we picke 2 NH₄⁺, ending with 2+.

The formula:

(NH₄)₂SO₄

To combine C₂H₃O₂⁻ with Pb⁴⁺ we do the same, because the anion is single charged.

Pick 1 Pb⁴⁺, ending with 4+.

Pick 4 C₂H₃O₂⁻, ending with 4-.

The formula:

Pb(C₂H₃O₂)₄

To combine C₂H₃O₂⁻ with NH₄⁺, both have same charge, so we just need one of each and their charges will cancel out.

The formula:

NH₄C₂H₃O₂

So, the formulas are:

Pb(SO₄)₂

(NH₄)₂SO₄

Pb(C₂H₃O₂)₄

NH₄C₂H₃O₂

Explanation:

Sometimes it is necessary to put forth new theories to explain experimental results, Explanation:

Creativity is important to science because sometimes, it is necessary to put forth new theories to explain experimental results. Theories are explanation of scientific observations.

Answer: Without creativity, it would be difficult to come up with new methods to answer scientific questions, meaning we likely wouldn't learn anything new.​

Explanation: took the quiz

Distillation is a useful technique in the synthesis and reactions of alkenes as it can help increase the yield by shifting the equilibrium towards the product side.

The synthesis of alkenes involves the elimination of a leaving group from a substrate. This can be achieved through various reactions such as dehydration of alcohols, dehydrohalogenation of alkyl halides, and dehalogenation of vicinal dihalides. Once the reaction is complete, the product mixture may contain a combination of desired and undesired products, and may also be in equilibrium with the reactants. Distillation can be used to separate the desired product from the reaction mixture, which helps to shift the equilibrium towards the product side, ultimately increasing the yield.

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Answer:

digestive system may be the answer

Answer:

troposphere

Explanation:

Answer:

Hello!!! Princess Sakura here ^^

Explanation:

We live in the troposphere since 99% of the water vapor in the atmosphere is found here.

Balanced formation equation at standard conditions Na (s) + \(\frac{1}{2}\)H₂ (g) + C (s, graphite) +  \(\frac{3}{2}\) O₂ (g) → NaHCO₃ (s) [ΔH° (Na (s)) = 0, ΔH° (H₂ (g)) = 0 and ΔH° (C (s, graphite)) = 0 and ΔH° (O₂ (g)) = 0].

A chemical reaction is a process in which chemical bonds between atoms to break and reorganize, to form a other new substances.

The chemical reaction for NaHCO₃ is

Na (s) + H₂ (g) + C (s, graphite) + O₂ (g) → NaHCO₃ (s)

Reactant Side    Product Side

Na = 1                  Na = 1

H = 2                    H = 1

C = 1                     N = 1

O= 2                     O = 3

In the reactant side there are 2 H atoms and in the product side 1H atoms. So multiply by \(\frac{1}{2}\) in the reactant side to balance H atoms.

Na (s) + \(\frac{1}{2}\)H₂ (g) + C (s, graphite) + O₂ (g) → NaHCO₃ (s)

Reactant Side    Product Side

Na = 1                  Na = 1

H = 1                    H = 1

C = 1                     N = 1

O= 2                     O = 3

In the reactant side there are 2 O atoms and in the product side 3 O atoms. So multiply by \(\frac{3}{2}\) in the reactant side to balance O atoms.

Na (s) + \(\frac{1}{2}\)H₂ (g) + C (s, graphite) +  \(\frac{3}{2}\) O₂ (g) → NaHCO₃ (s)

Reactant Side    Product Side

Na = 1                  Na = 1

H = 1                    H = 1

C = 1                     N = 1

O = 3                    O = 3

Now the above equation is balanced.

Now, write the balanced formation equation at standard conditions

Na (s) + \(\frac{1}{2}\)H₂ (g) + C (s, graphite) +  \(\frac{3}{2}\) O₂ (g) → NaHCO₃ (s) [ΔH° (Na (s)) = 0, ΔH° (H₂ (g)) = 0 and ΔH° (C (s, graphite)) = 0 and ΔH° (O₂ (g)) = 0]

Thus from the above conclusion we can say that Balanced formation equation at standard conditions Na (s) + \(\frac{1}{2}\)H₂ (g) + C (s, graphite) +  \(\frac{3}{2}\) O₂ (g) → NaHCO₃ (s) [ΔH° (Na (s)) = 0, ΔH° (H₂ (g)) = 0 and ΔH° (C (s, graphite)) = 0 and ΔH° (O₂ (g)) = 0]

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Answer:

1=d

2=ricter scale

Explanation:

The first thing to do is to find the number of moles of Ammonia, NH3 and the number of moles of Oxygen,O2.

From the question, we are given the following parameters; The Initial partial pressure of NH3 = 0.5 atm. The Initial volume and final volume of NH3 is 2L and 3L respectively. Also, The Initial volume and final volume of O2 is 1L and 3L respectively, the Initial partial pressure of O2 is 1.5 atm.

The number of moles, n of NH3= 0.0446 mole and the number of moles of oxygen= 0.067 moles.

The next thing to do is to do is to find the limiting reagent which is ammonia,NH3.

We can now use the limiting reagent to find the partial pressure of NO.

So, PV = nRT.

P × 3= 0.0446 × 0.0806 × 273.

P= 0.0446 × 0.08206 × 273/ 3.

P= 0.999146148/3.

Partial pressure of NO= 0.3 atm.

OR

We can just find the partial pressure directly from NH3 as below;

0.5 × 2/ 3 = 0.33 atm.

From the balanced equation, 4 moles of NH3 produces 4 moles of NO.

So, 0.33 atm for NH3 = 0.33 atm for NO.

Therefore, the partial pressure present is 0.33 atm.

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The false statement among the given options is: "All gases are colorless and odorless at room temperature."

While many gases may indeed be colorless and odorless at room temperature, there are exceptions. Some gases, such as chlorine (Cl₂) and sulfur dioxide (SO₂), have distinct colors and odors. Chlorine gas has a yellow-green color and a distinct odor, while sulfur dioxide gas has a pungent, suffocating odor.

Gases are highly compressible. Non-reacting gas mixtures are homogeneous.Gases expand spontaneously to fill the container they are placed in. Distances between molecules of gas are very large compared to bond distances within molecules.

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Answer:

b

Explanation:

they have coal mines that go down deep into the earth but they also have mines called strip pits where they dig down and create a large creator in the earth insted of a mine shaft

The respective answers for second order decomposition of xy are

                         a- 1424.5 s.

                         b- 9971.5 s

                         c- 1347.9 s

                         d- 0.042 m

Lets try to solve this equation-

The given rate constant (k) is 7.02 × 10-3 m-1 s-1.

The second order reaction can be represented as

A → products

The integrated rate law for second-order reaction is given as;

1/[A]t = kt + 1/[A]0 where [A]0 is the initial concentration of A.

The half-life of a second-order reaction is given by

t1/2 = 1/k[A]0

The initial concentration of the reaction = [A]0 = 0.100 m

a)

The half-life can be calculated by substituting the given values in the above equation;t1/2 = 1/(7.02 × 10-3 m-1 s-1 × 0.100 m)t1/2 = 1424.5 s

Therefore, the half-life for this reaction at an initial concentration of 0.100 m is 1424.5 s.

b)

We have to determine the time it takes for the concentration of A to decrease to 12.5% of its initial value.

The concentration of A at any time is given by the following equation;

[A]t = [A]0/(1 + kt[A]0)

0.125[A]0 = [A]0/(1 + k × t [A]0)

8 = 1 + k × t[A]0

k × t[A]0 = 7

t = 7/(7.02 × 10-3 m-1 s-1 × 0.100 m)t = 9971.5 s

Therefore, it will take 9971.5 seconds for the concentration of A to decrease to 12.5% of its initial value when the initial concentration is 0.100m.

c)

If the initial concentration of xy is 0.150m, how long will it take to decrease to 0.062 m

The concentration of A at any time is given by the following equation;

[A]t = [A]0/(1 + kt[A]0)

0.062[A]0 = 0.150m/(1 + 7.02 x 10-3 × t0.150m)

= 1347.9 s

Therefore, it will take1347.9 seconds for the concentration of A to decrease from 0.150 m to 0.062 m

d)

The concentration of A at any time is given by the following equation;

[A]t = [A]0/(1 + kt[A]0)[A]t = [0.050 m]/[1 + (7.02 × 10-3 m-1 s-1) × (500 s) × (0.050 m)] = 0.042 m

Therefore, the concentration of xy after 500 seconds is 0.042 m.

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The mass of magnesium chloride produced in the reaction is 4.17 grams.

The balanced chemical equation for the reaction between Mg and HCl is:

Mg + 2HCl → MgCl2 + H2

To solve this problem, we need to determine which reactant is limiting and use its stoichiometry to calculate the amount of product produced.

First, we need to find the number of moles of Mg and HCl used in the reaction:

moles of Mg = 4.00 g / 24.31 g/mol = 0.1643 mol

moles of HCl = 3.20 g / 36.46 g/mol = 0.0878 mol

According to the balanced equation, the reaction uses 1 mole of Mg for every 2 moles of HCl. Therefore, Mg is in excess and HCl is the limiting reagent.

The stoichiometry of the balanced equation tells us that 2 moles of HCl produce 1 mole of MgCl2. So, the number of moles of MgCl2 produced can be calculated as:

moles of MgCl2 = 0.0878 mol HCl × (1 mol MgCl2 / 2 mol HCl) = 0.0439 mol MgCl2

Finally, we can calculate the mass of MgCl2 produced using its molar mass:

mass of MgCl2 = 0.0439 mol × 95.21 g/mol = 4.17 g

Therefore, the mass of magnesium chloride is 4.17 grams.

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The molarity of the solution is approximately 5.0 M.

To calculate the molarity (M) of a solution, we need to divide the moles of solute by the volume of the solution in liters.

First, we need to convert the mass of NaOH to moles. The molar mass of NaOH is 22.99 g/mol for Na, 16.00 g/mol for O, and 1.01 g/mol for H, giving us a total molar mass of 39.99 g/mol for NaOH.

Moles of NaOH = 120.0 g / 39.99 g/mol

= 3.00 mol

Next, we divide the moles of NaOH by the volume of the solution in liters:

Molarity (M) = moles of solute / volume of solution in liters

M = 3.00 mol / 9.60 L

= 0.3125 M

Rounding to the appropriate number of significant figures, the molarity of the solution is approximately 5.0 M.

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At the threshold value of a neuron, voltage-gated sodium (Na+) channels open. The threshold value of a neuron is the critical level of depolarization that must be reached in order for an action potential to be generated. When this threshold value is reached, it causes voltage-gated sodium (Na+) channels in the neuron's membrane to open.

This allows sodium ions to flow into the neuron, causing further depolarization and leading to the generation of an action potential.Voltage-gated potassium (K+) channels also play a role in the generation of action potentials. However, these channels do not open at the threshold value of a neuron.

Instead, they open later in the action potential, allowing potassium ions to flow out of the neuron and repolarize the membrane. Chemically-gated sodium (Na+) channels are also involved in the generation of action potentials, but these channels are not voltage-gated and are not involved in the threshold value of a neuron.

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Answer:

soapy water is not good for plants irrigation that is what I learn

Answer:

Soapy water is not good for plant irrigation because soapy water contains sulphate in it which is not good for the development of plants.

Explanation:

hope this helps

The CEC for this soil sample is 675.2 cmol(+)/kg.

The % Base Saturation for this soil sample is approximately 136.62%.

The % Acid Saturation for this soil sample is approximately 60.55%.

To    calculate the CEC, % Base Saturation (B.S.), and % Acid Saturation for the given soil sample:

a. Calculation of CEC (Cation Exchange Capacity):

CEC is the sum of exchangeable cations in the soil. From the given results, we have:

CEC = Ca2+ + Mg2+ + K+ + Al3+

CEC = (100 mg/L + 45 mg/L + 85.5 mg/L + 94.2 mg/L) / (25 g / 1000)

CEC = 168.7 mg / (25 g / 1000)

CEC = 675.2 cmol(+)/kg

b. Calculation of % Base Saturation (B.S.):

% B.S. represents the percentage of CEC occupied by base cations. In this case, we consider Ca2+, Mg2+, and K+ as base cations. The formula to calculate % B.S. is:

% B.S. = (Ca2+ + Mg2+ + K+) / CEC * 100

% B.S. = (100 mg/L + 45 mg/L + 85.5 mg/L) / (168.7 cmol(+)/kg) * 100

% B.S. = 230.5 mg / (168.7 cmol(+)/kg) * 100

% B.S. = 136.62%

c. Calculation of % Acid Saturation:

% Acid Saturation represents the percentage of CEC occupied by acid cations, in this case, H+ and Al3+. The formula to calculate % Acid Saturation is:

% Acid Saturation = (H+ + Al3+) / CEC * 100

% Acid Saturation = (8.0 mg/L + 94.2 mg/L) / (168.7 cmol(+)/kg) * 100

% Acid Saturation = 102.2 mg / (168.7 cmol(+)/kg) * 100

% Acid Saturation = 60.55%

Please note that the given values were in milligrams per liter (mg/L), and the CEC and % Saturation values were calculated assuming a conversion from mg/L to cmol(+)/kg using the mass of the soil sample (25 g).

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Explanation:

1) There are three sub atomic particles; protons, neutrons and electrons. Protons and Neutrons are found in the nucleus while electrons are found in orbitals outside the Nucleus.

2)  No. This is not always the case. An example is sodium which has atomic mass of 23.

Atomic Mass = Neutrons + Protons

23 = Neutrons + 11

Neutrons = 23 - 11 = 12

In sodium there are 11 protons and 12 neutrons

Answer:

Carbon

Explanation:

9 When 0.1 mol of atoms of an element reacts with chlorine, there is an increase in mass of 7.1 g. The element could be carbon.

If 14.5 g NaCl is dissolved in enough water to make 1L of solution 0.2481177 mol/L is the molarity of the solution.

Molarity (M) is the amount of a substance in a certain volume of solution. Molarity is defined as the moles of a solute per litres of a solution. Molarity is also known as the molar concentration of a solution.

\(\rm Molarity = \rm\frac{Moles \;of \;solute}{Volume\; of \;solution \;in \;litre}\)

Given data:

The volume of solution=  1 L

Given mass = 14.5 g

Step 1: Calculating the molarity of NaCl.

The Molar mass of NaCl = 58.44 g/mol

\(\rm Mol= \rm\frac{Given \;mass}{Molar \;mass}\)

\(\rm Mol= \rm\frac{14.5 g}{58.44 g/mol}\)

Mol = 0.2481177 mol

Putting the given values in the equation.

\(\rm Molarity = \rm\frac{Moles \;of \;solute}{Volume\; of \;solution \;in \;litre}\\\)

\(\rm Molarity = \rm\frac{0.2481177 mol}{1 L}\\\)

Molarity =0.2481177 mol/L

Hence, If 14.5 g NaCl is dissolved in enough water to make 1L of solution 0.2481177 mol/L is the molarity of the solution.

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Answer:

m and o

Explanation:

n is the number between m and o

Answer:

carbon-12 has a mass of 12.

carbon-13 has a mass of 13

Explanation:

by adding the protons and neutrons of each atom

6+6=12

6+7=13

Answer:

A large amount or number of something any things

Explanation:

The masses refers to a large,general group of regular folks_ the common people of a society.

Answer: they convert heat to electricity.

Explanation:

Answer:

Please give me Brainliest it would mean a lot