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In which polymer does the monomer include a benzene ring?

Answer:

C is correct

Explanation: Heat describes the transfer of thermal energy between molecules within a system and is measured in Joules. Heat measures how energy moves or flows. ... Temperature describes the average kinetic energy of molecules within a material or system and is measured in Celsius (°C), Kelvin(K), Fahrenheit (°F), or Rankine (R)

Answer:

oxygen is the most abundant element on the earth.

Let's first count how many atoms of each element we have on each side of the reaction.

Reagent side

Mg --->1 atom

Fe ---> 2 atoms

O ---->3 atoms

Product side

Mg --->1 atom

Fe ---->1 atom

O ----> 1 atom

We see that we have three oxygens on the reactant side and one on the product side, therefore we place the coefficient 3 in front of the MgO molecule:

Now we balance the Mg atoms that changed, we have 3 atoms in the products, so we put the coefficient 3 in front of Mg

And finally we need to balance the iron, we have 2 iron atoms in the reactants, so we put the coefficient 2 in front of the iron molecule:

Now we have on each side of the reaction:

Mg ---3 atoms

Fe ----2 atoms

O ---3 atoms

Now the reaction is balanced.

We have a substitution reaction because Mg trades place with Fe

If a snail crawls 55 inches per day ,the snail will crawl approximately \(3.2 * 10^3 centimeters.\)

To convert inches to centimeters, we need to use the conversion factor: 1 inch = 2.54 centimeters.

First, let's calculate the distance the snail crawls in inches in 23 days. We can multiply the daily distance by the number of days:

Distance in inches = 55 inches/day × 23 days = 1265 inches.

Now, to convert the distance from inches to centimeters, we multiply the distance in inches by the conversion factor:

Distance in centimeters = 1265 inches × 2.54 cm/inch = 3215.1 cm.

Rounding to the appropriate number of significant figures, the snail will crawl approximately 3215 cm or \(3.2 * 10^3 centimeters.\) in 23 days.

Therefore, the answer is  Option 3:\(3.2 * 10^3 centimeters.\)

This means that in 23 days, the snail will crawl approximately\(3.2 * 10^3 centimeters.\)

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Answer:

To calculate the molar mass of the gas, we can use the ideal gas law, which relates the pressure, volume, temperature, and number of moles of a gas:

PV = nRT

where P is the pressure in atmospheres, V is the volume in liters, n is the number of moles, R is the ideal gas constant (0.0821 L·atm/mol·K), and T is the temperature in kelvin.

First, we need to convert the temperature to kelvin:

T = 99.0 °C + 273.15 = 372.15 K

Next, we can calculate the number of moles of gas using the ideal gas law:

n = PV/RT

where P is the pressure in atmospheres (we convert 748 torr to atmospheres by dividing by 760 torr/atm), V is the volume in liters (we convert 250 mL to 0.25 L), R is the ideal gas constant, and T is the temperature in kelvin:

n = (748/760) × 0.25 L / (0.0821 L·atm/mol·K × 372.15 K) = 0.0105 mol

Finally, we can calculate the molar mass of the gas by dividing the mass of the condensed vapor (1.097 g) by the number of moles:

molar mass = mass/number of moles = 1.097 g / 0.0105 mol = 104.38 g/mol

Therefore, the molar mass of the gas is approximately 104.38 g/mol.

Explanation:

Answer:If the pressure of a gaseous reaction mixture is changed the equilibrium will shift to minimise that change. If the pressure is increased the equilibrium will shift to favour a decrease in pressure.

Explanation:

Slidin brainliest??

Answer:

[Xe]: 6s²

Explanation:

that's the noble gas config for Barium.

The electron configuration of barium (Ba) in noble gas notation is [Xe] 6s². This shorthand notation signifies that barium has chemically stable electron configuration similar to that of the noble gas xenon (Xe), plus two additional electrons in the 6s orbital.

The electron configuration of an element represents the distribution of electrons in an atom's electron shells. Barium (Ba) is a chemical element with atomic number 56 in the periodic table. Its electron configuration can be written out in full, but the noble-gas notation provides a convenient shorthand. To write the electron configuration of barium in noble gas notation, you first locate the nearest noble gas that precedes barium in the periodic table. In this case, the nearest noble gas is xenon (Xe), which has an atomic number of 54. This leaves two more electrons, which go into the 6s orbital. So, the electron configuration of barium in noble gas notation is [Xe] 6s².

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Answer:

Ionic bond.

Explanation:

Group 7 elements like Bromine (Br) and group 2 elements like Magnesium,(Mg) involved loss and gain of electrons which is typical with Ionic bonding.

Answer:

2.31 g

Explanation:

Step 1: Given data

Step 2: Calculate the mass of water that can be vaporized with 1250 calories of energy

We will use the following expression.

Q = ΔH°vap × m

m = Q/ΔH°vap

m = 1250 cal/(540 cal/g)

m = 2.31 g

The overall order of the reaction is 3 and the rate law for the reaction is rate =  [A]^n [B]^m [C]^l

1) The order of reactant A is first order reactant because a first-order reaction can be defined as a chemical reaction in which the reaction rate is linearly dependent on the concentration of only one reactant.

The order of reactant B is second order reactant because a second order reaction is a type of chemical reaction that depends on the concentrations of one-second order reactant or two first-order reactants.

Thus, the overall order of the reaction is 3.

2) The rate law in this reaction is;

rate =  [A]^n [B]^m [C]^l

But in this question, since the reactant C is zero order, then it will be simplified to; rate = k[A][B]² .

3) When we plug in the initial concentrations of A and B, we will get the rate constant of the problem which is k = 20.

4) The initial rate when [A]0=4.87 mmol⋅L−1 , [B]0=0.184 mmol⋅L−1 , and [C]0=12.0 mmol⋅L−1 is;

Rate = 20 * 4.87 * 0.184²

Rate = 3.3

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Answer:

\(Cp_{metal}=39.0\frac{J}{g\°C}\)

Explanation:

Hello,

In this case, since the following equation relates heat, mass, specific heat and temperature:

\(Q=mCp(T_2-T_1)\)

For the two substances, we say that the heat lost by the metal equals the heat gained by the water, thus we have:

\(m_{water}Cp_{water}(T_2-T_{water})=-m_{metal}Cp_{metal}(T_2-T_{metal})\)

Thus, the specific heat of the metal turns out:

\(Cp_{metal}=\frac{m_{water}Cp_{water}(T_2-T_{water})}{m_{metal}(T_2-T_{metal})}\)

Therefore, we obtain:

\(Cp_{metal}=\frac{125g*4.18\frac{J}{g\°C} *(31.0-91.0)\°C}{-134.0g*(31.0-25.0)\°C}\\\\Cp_{metal}=39.0\frac{J}{g\°C}\)

Best regards.

A natural resource found in nature that humans use may be coal, which is a non-renewable fossil fuel obtained from the earth's crust.

A natural resource can be defined as any material and or energy obtained from the environment and available to be used to achieve a particular objective.

Natural resource bay be finite such as occurs with fossil fuels (i.e., coal, sedimentary rocks from the earth's crust, natural gases, etc) or also they can be obtained in reversible ways and therefore in an infinite amount (e.g. the energy from the sun or the eolic energy, which are renewable sources of energy)

Therefore, with this data, we can see that a natural resource is any type of piece of matter or also different types of energies that can be renewables and not renewables such as occur with eolic energy and coal, respectively.

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Answer: (A,B,D) [1, 2, 4]

Explanation:

33.33

Let the required percentage value be "x".

44 is what percent of 132 is expressed as:

Simplify the equation to geet the values of "x"

Divide both sides by 0.32 to have:

Answer:

One of water's most significant properties is that it takes a lot of energy to heat it. Precisely, water has to absorb 4,184 Joules of heat (1 calorie) for the temperature of one kilogram of water to increase 1°C. For comparison sake, it only takes 385 Joules of heat to raise 1 kilogram of copper 1°C.

Explanation:

This is a perfect answer

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To determine which of the following covalent bonds would require the least energy to break apart in a given molecule: Energy Required to Break: The greatest energy to break is C—H, N—H, O—H, C—N, C—O, and C—C.

The energy needed to break a covalent link between two atoms is known as covalent bond energy. Atoms share electrons in their outer shell to create covalent bonds, which can result in a stable and energetically advantageous arrangement of electrons. The atoms involved, their electronegativities, and the length of the connection all affect how strong a covalent bond is. Covalent bonds often have higher electronegativities and shorter bond lengths. Covalent bonds between the atoms of carbon, hydrogen, oxygen, nitrogen, and phosphorus play a crucial role in the synthesis of complex macromolecules like proteins, nucleic acids, and carbohydrates in living things. Understanding covalent bond energy is crucial for formulating medications that can target specific biological molecules and for predicting the reactivity of compounds.

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Answer:

biochemist is both life science and a chemical . it explores the chemistry of the living organisms and the molecular basis for the changes occurring in the living organisms. it uses the method of chemistry . BIOCHEMIST has become the foundation for understanding all biological processes

Answer:

Approximately \(3.03\times 10^{-19}\; \rm J\), which corresponds to a wavelength of approximately \(6.56 \times 10^{2}\; \rm nm\) in vacuum.

Explanation:

When the electron of a hydrogen atom transits from energy level \(n_1\) to \(n_2\), the energy change would be:

\(\displaystyle \Delta E \approx 2.179 \times 10^{-18}\; {\rm J} \, \left(\frac{1}{{(n_1)}^{2}} - \frac{1}{{(n_2)}^{2}}\right)\).

For the transition from \(n_1 =3\) to \(n_2 = 2\):

\(\begin{aligned}\Delta E &\approx 2.179 \times 10^{-18}\; {\rm J} \, \left(\frac{1}{{(n_1)}^{2}} - \frac{1}{{(n_2)}^{2}}\right)\\ &= 2.179 \times 10^{-18}\; {\rm J} \, \left(\frac{1}{{3}^{2}} - \frac{1}{{2}^{2}}\right) \\ &\approx -3.02639 \times 10^{-19} \; \rm J \\ &\approx -3.03\times 10^{-19}\; \rm J\end{aligned}\).

The value of \(\Delta E\) is negative because energy is released during this transition.

Look up Planck's Constant (for finding frequency from energy) and the speed of light in vacuum (for finding wavelength from frequency.)

Calculate the frequency \(f\) of photons from this transition using the Planck-Einstein relation:

\(E = h \cdot f\).

Therefore:

\(\begin{aligned}f &= \frac{E}{h}\end{aligned}\).

Calculate the wavelength \(\lambda\) of these photos in vacuum:

\(\begin{aligned}\lambda &= \frac{c}{f} \\ &= \frac{c}{ E/ h} \\ &= \frac{h \cdot c}{E} \\ &\approx \frac{6.62607 \times 10^{-34}\; \rm J \cdot s \times 2.99792 \times 10^{8}\; \rm m \cdot s^{-1}}{3.02639 \times 10^{-19}\; \rm J} \\ &\approx 6.65 \times 10^{-7}\; \rm m \\ &= 6.65 \times 10^{-7}\; \rm m \times \frac{10^{9}\;\rm nm}{1\; \rm m} \\ &= 6.65 \times 10^{2}\; \rm nm\end{aligned}\).

Grams of acetic acid in 500 ml vinegar=39.744 g

Titration (equivalence point⇒mol acid(CH₃COOH)=mol base(NaOH))

M₁V₁n₁=M₂V₂n₂(n=valence acid/base, for CH₃COOH and NaOH=1)

\(\tt M_1\times 2.5\times 1=0.0960\times 34.5\times 1\\\\M_1(acetic~acid)=1.3248~mol/L\)

For MW CH₃COOH = 60 g/mol, mass of acetic acid in 1 L :

\(\tt 1.3428~mol/L\times 60~g/mol=79.488~g/L\)

for 500 ml :

\(\tt 79.488\times 0.5~L=39.744~g\)

The mass of vinegar present in 500mL of solution is 39.6 g.

Concentration of acid (CA) = ?

Volume of acid(VA) = 2.50 ml

Concentration of base (CB) =0.0960 M

Volume of base (VB) =  34.50 ml

Number of moles of acid = 1

Number of moles of base = 1

Equation of the reaction;

CH3COOH (aq) + NaOH(aq) ------> CH3COONa(aq) + H2O(l)

From CAVA/CBVB = NA/NB

CAVANB = CBVBNA

CA = CBVBNA/VANB

CA = 0.0960 × 34.50 × 1/2.50 × 1

CA = 1.32 M

Number of moles = concentration  × volume

Number of moles = 1.32 M × 500/1000

Number of moles = 0.66 moles

Number of moles = mass/molar mass

Mass = Number of moles  × molar mass

Molar mass of acetic acid = 60 g/mol

Mass =  0.66 moles  ×  60 g/mol

Mass = 39.6 g

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Answer:

Milk's heavy

Explanation:

Answer:

i think it will be the first one

Explanation:

Answer:

In a blast furnace, the carbon fuel will be oxidized before the metal in the oxide is reduced. The metal in the oxide is then reduced by carbon monoxide and the product of the reaction will be metal and carbon dioxide.

Explanation:

Answer:

1.44 STABLE

Explanation:

Explanation:

i think the answer is A ........ hope this helps

a) The balanced chemical equation for the reaction is: 2H₂ + O₂ → 2H₂O

b) the number of moles of O₂ required is approximately 1.004 moles.

c)  approximately 45 liters of H₂ and 22.5 liters of O₂ are needed to obtain 45 liters of H₂O.

a) Balancing the chemical equation:

The balanced chemical equation for the reaction is: 2H₂ + O₂ → 2H₂O

b) Calculating the number of moles of the reactants needed to obtain 45 liters of H₂O:

From the balanced equation, we can see that for every 2 moles of H₂O produced, we need 2 moles of H₂ and 1 mole of O₂. Since the stoichiometry is based on moles, we need to convert the given volume of H2O into moles.

To convert volume to moles, we need to use the ideal gas law, PV = nRT. At standard temperature and pressure (STP), the molar volume of an ideal gas is 22.4 liters.

Given that we have 45 liters of H2O, we can calculate the number of moles as follows:

moles of H₂O = (volume of H₂O) / (molar volume at STP)

            = 45 liters / 22.4 liters/mol

            ≈ 2.008 moles of H₂O

Since the stoichiometry of the reaction is 2 moles of H₂O for every 2 moles of H₂, we need an equal number of moles of H₂. Therefore, the number of moles of H₂ required is also approximately 2.008 moles.

For O₂, since the stoichiometry is 1 mole of O₂ for every 2 moles of H₂O, we need half the number of moles of H₂O. Thus, the number of moles of O₂required is approximately 1.004 moles.

c)  the volume of the reactants:

Since the stoichiometry of the balanced equation is 2 moles of H₂for every 1 mole of O₂ and 2 moles of H₂O, we can deduce the volume of the reactants based on their molar volumes at STP.

For 2.008 moles of H₂, the volume can be calculated as follows:

volume of H₂= (moles of H₂) * (molar volume at STP)

            = 2.008 moles * 22.4 liters/mol

            ≈ 45 liters of H₂

For 1.004 moles of O₂, the volume can be calculated similarly:

volume of O₂= (moles of O₂) * (molar volume at STP)

            = 1.004 moles * 22.4 liters/mol

            ≈ 22.5 liters of O₂

Therefore, approximately 45 liters of H₂and 22.5 liters of O₂ are needed to obtain 45 liters of H₂O

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Answer:Gamma rays have the highest energy and shortest wavelength. Then come X-rays, ultraviolet light, visible light, infrared radiation and microwave radiation.

Explanation: