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The isotope is a neutral atom as the number of electrons and protons are equal in an isotopic atom.

Isotopes can be described as atoms of an element that exhibit the same atomic number but a different atomic mass. Isotopes of an element exhibit an equal number of electrons and protons Therefore, they are not charged atoms. The numbers of neutrons in their respective nucleus of an isotope of an element is different.

In the isotopes of oxygen element, the number of neutrons in oxygen increases by 1, and it creates the isotope of oxygen. The number of electrons or protons in each isotope of oxygen element are eight therefore, all the isotope are neutral.

Therefore, the isotopes of an element are not charged atoms.

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Answer:

plasma flows but is a solid

Explanation:

example toothpaste flows but is a solid

Answer:

C₂H6

Explanation:

Among the given options, the formula A) C₂H6 represents a hydrocarbon (specifically, ethane). Option A

A hydrocarbon is a compound that consists of only carbon and hydrogen atoms. It is important to identify the formula that represents a hydrocarbon among the given options:

A) C₂H6: This formula represents ethane, which is a hydrocarbon. Ethane consists of two carbon atoms bonded together with single bonds and six hydrogen atoms.

B) C₂H5OH: This formula represents ethanol, which is not a hydrocarbon. Ethanol contains a hydroxyl group (-OH), indicating the presence of oxygen in addition to carbon and hydrogen atoms. It is an alcohol, not a hydrocarbon.

C) C₂H5Cl: This formula represents ethyl chloride, which is not a hydrocarbon. Ethyl chloride contains a chlorine atom (Cl) in addition to carbon and hydrogen atoms. It is a haloalkane, not a hydrocarbon.

D) C₂H6O: This formula represents ethanol, which, as mentioned before, is not a hydrocarbon. Ethanol contains an oxygen atom (O) in addition to carbon and hydrogen atoms. It is an alcohol, not a hydrocarbon.

Among the given options, the formula A) C₂H6 represents a hydrocarbon (specifically, ethane). It consists only of carbon and hydrogen atoms, making it a suitable representation of a hydrocarbon.

In summary, the formula C₂H6 (option A) represents a hydrocarbon, while the other options contain additional elements (oxygen or chlorine) that make them non-hydrocarbon compounds. Option A

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Answer: 33.71

Explanation:

33.01(.6523) + 35.01(.3477) = 33.7054

rounds to 33.71

Answer:

Here is the definition: A medical thermometer (also called clinical thermometer) is used for measuring human or animal body temperature.

Answer:

reflection is correct answer by my views

The question is incomplete, the complete question is;

A student investigated some properties of lead and recorded the findings in the table below. Property Observation Color Dull gray Density 11.3 g/cm3 Volume of sample 3 cm3 Melting point 327°C Reaction with air Lead oxide forms on the surface Electrical conductivity Conducts some electricity Which statement is true with respect to the investigation?

A. The student investigated only the physical properties of lead.  

B. The student investigated only the chemical properties of lead.  

C. The student investigated more physical properties than chemical properties of lead.  

D. The student investigated more chemical properties than physical properties of lead.

Answer:

The student investigated more physical properties than chemical properties of lead.

Explanation:

If we look at the things mentioned in the question as regards the approach of the student towards the study of lead, we will discover that he/studied;

Colour, density, volume, melting point and electrical conductivity which are all physical properties. Physical properties of a substance does not involve chemical reactions of the substance under study.

The only chemical property studied by the student is its formation of an oxide- lead oxide with air as follows;

2Pb(s) + O₂(g) → 2PbO(s)

Thus we can safely conclude that; the student investigated more physical properties than chemical properties of lead.

Answer:

c

Explanation:

edge 2021 :)

Given;At t = 0 seconds, the concentration of S2O8^-2 is 0.010 MThe half-life for the decomposition of S2O8^-2 is 75 seconds. The concentration of S2O8^-2 remaining at 1600 s is___3.635 x 10^-7 ___ M.

To solve this, we need to use the first-order reaction equation, which is:k = 0.693/t1/2Wherek is the rate constantt1/2 is the half-life of the reaction from the equation, the rate constant (k) can be calculated by;k = 0.693/t1/2 = 0.693/75 = 0.00924s^-1Let's find the concentration of S2O8^-2 after 1600 s using the first-order rate law equation. The equation is;ln([S2O8^-2]t/[S2O8^-2]0) = -ktWhere[S2O8^-2]t is the concentration at the remaining time[S2O8^-2]0 is the initial concentration oft = the remaining timek = the rate constantln = natural logSubstituting the given values in the equation;ln([S2O8^-2]t/0.010) = -0.00924 x 1600ln([S2O8^-2]t) = -14.784[S2O8^-2]t = e^-14.784[S2O8^-2]t = 3.635 x 10^-7 MConsequently, the concentration of S2O8^-2 remaining at 1600 s is 3.635 x 10^-7 M.

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Answer:

Covalent Bond

Explanation:

Answer:

covalent bonding

Type of Bonding: Sulfur Dioxide is a process of covalent bonding, since Sulfur and Oxygen are both non-metals. The Sulfur is in the center surrounded by 2 Oxygen atoms. In this situation, as depicted below, Sulfur Dioxide is a resonance structure and can be expressed in three different forms

Explanation:

hope that helps

Answer:

1. Natural resource are resources that exist without any action of humankind.

2. Rocks from the basis for soil and determine the type of natural vegetation and land use.

3. we use them in building material, cosmetics, cars, road, and appliances etc

The density of gasoline id 0.008 g/ml is 18.64 gram.

Density is defined as mass per unit volume it means that mass is present in one meter cube.

S.I unit of density is kg/meter^3.

Mathematically

Density = Mass/Volume.

In above question

Volume = 2330 mL

Density = 0.008 g/mL

Density = mass/ volume

So,

Mass = density x volume

Mass = 0.008 x 2330

Mass = 18.64 gram

Therefore, The density of gasoline id 0.008 g/ml is 18.64 gram.

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Answer: we would die

Explanation:

the pressure being so large would squash us flat.

Answer: Yes they do;

Explanation:

Axons, the long projections of neural cells that make up our peripheral nervous system's nerves, are comparable to power wires in that they have dense electrical insulation and can easily transmit impulses from the body and signals from the brain to a toe, for example.

Answer: 0.834 L

Explanation:

Volume is the scalar quantity that is the space required by the solution or the substance. The volume required for the 146.3g of 3.00M NaCl is 0.834 L.

Molarity is the concentration of the solution and is given as the ratio of the moles and the volume of the solution. The volume of the solution or the solute is inversely proportional to the molarity of the substance.

Molarity is given as,

\(\rm Molarity (M) =\rm \dfrac{ Moles(n) }{\text{Volume in L}}\)

Here,

Molarity of sodium chloride = 3.00M

Mass of sodium chloride = 146.3g

Molar mass of sodium chloride = 58.44 g/mol

Substituting values in the equation:

\(\begin{aligned} \rm Molarity &= \rm \dfrac{mass}{Molar \;mass \times Volume}\\\\\rm V &= \dfrac{146.3}{ 58.44 \times 3.00}\\\\&= 0.8344 \;\rm L\end{aligned}\)

Therefore, the volume of the sodium chloride required is 0.834 L

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The change in entropy of the gas, calculated using the given values of 5.42 mol of an ideal gas, a pressure change from 22.3 to 17.1 Pa, and a constant temperature of 101 K, is -8.79 J/K.

The change in entropy of an ideal gas can be calculated using the equation:

ΔS = nR ln(V₂/V₁)

In this case, we are given the pressure change, but we need the volume change to calculate the change in entropy. However, since the temperature is constant, we can use the ideal gas law to relate the initial and final volumes:

PV = nRT

By rearranging the equation, we can express the volume as:

V = (nRT)/P

Substituting the values into the entropy equation, we have:

ΔS = nR ln((nRT₂)/(P₂(nRT₁)/P₁)

ΔS = (5.42 mol)(8.314 J/(mol·K)) ln((5.42 mol)(101 K)(17.1 Pa)/(22.3 Pa)(101 K))

Calculating this expression:

ΔS = (5.42)(8.314) ln((5.42)(101)(17.1)/(22.3)(101))

= (45.034) ln(9263.82/2240.3)

= (45.034) ln(4.1324)

≈ (45.034) (1.4152)

≈ -8.79 J/K

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The volume of hydrogen gas produced in the reaction is approximately 0.67 m³. None of the given option is correct.

To determine the volume of hydrogen gas produced in the reaction, we need to calculate the number of moles of hydrogen gas first. Then, we can use the ideal gas law to convert the number of moles to volume at room temperature and pressure.

From the balanced chemical equation:

Zn + 2HCl -> ZnCl₂ + H₂

We can see that 1 mole of zinc reacts with 2 moles of hydrochloric acid to produce 1 mole of hydrogen gas.

Given:

Mass of zinc (Zn) = 4.55 g

Molar mass of zinc (Zn) = 65.38 g/mol

Concentration of hydrochloric acid (HCl) = 2.25 mol/dm³

Volume of hydrochloric acid (HCl) = 50 cm³ = 50 × 10⁻³ dm³

First, we calculate the number of moles of zinc:

Number of moles of zinc (Zn) = Mass / Molar mass = 4.55 g / 65.38 g/mol

Since the ratio between zinc and hydrogen gas is 1:1, the number of moles of hydrogen gas produced is also equal to the number of moles of zinc.

Now, we can convert the number of moles of hydrogen gas to volume using the ideal gas law:

PV = nRT

Assuming room temperature (around 298 K) and pressure (around 1 atm), we can rearrange the equation to solve for volume (V):

V = nRT / P

Plugging in the values:

V = (Number of moles of hydrogen gas) × (Ideal gas constant) × (Temperature) / (Pressure)

Calculating the volume of hydrogen gas:

V = (4.55 g / 65.38 g/mol) × (0.0821 dm³·atm/mol·K) × (298 K) / (1 atm)

V ≈ 0.67 dm³

Converting to the desired units:

V ≈ 0.67 × 10³ cm³ = 0.67 × 10³ × 10⁻³ m³ = 0.67 m³

None of the given answer options match the calculated volume, so it seems there might be an error in the provided options.

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The correct pairing of a greenhouse gas with its primary anthropogenic source is: Methane and vehicular emissions.

The Greenhouse Effect is a naturally occurring process that is necessary for the maintenance of the planet's temperature. The sun's energy travels to Earth in the form of light. The Earth reflects some of this energy back to space while absorbing the remainder, which warms the planet.

Methane is a greenhouse gas that is released by several human activities, including fossil fuel production and use, landfills, agriculture, and livestock farming. Methane, like carbon dioxide, contributes to global warming by trapping heat in the Earth's atmosphere.

Vehicular emissions are the gases and particulate matter emitted by vehicles. They include carbon monoxide, nitrogen oxides, particulate matter, and other pollutants that are hazardous to human health and the environment.

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: PM2.5 is defined as the mass concentration of particles in the air less than or equal to 2.5 micrometers in diameter.Question 15: False, carbon dioxide (CO2) is not considered a criteria air pollutant.

Question 16: The closest answer is 50%, but the exact percentage is not provided in the question.Question 17: The term "photochemical smog" is most synonymous with ozone (O3), which is a criteria air pollutant.Question 18: True, attainment of ambient air quality standards requires that measured concentrations at all monitoring stations within an air district are below ambient air standards.

Question 14 asks about the definition of PM2.5. PM2.5 refers to particulate matter with a diameter less than or equal to 2.5 micrometers. It represents the mass concentration of particles suspended in the air, which are small enough to be inhaled into the respiratory system and can have adverse health effects.

Question 15 states whether carbon dioxide (CO2) is a criteria air pollutant. Criteria air pollutants are a set of pollutants regulated by environmental agencies due to their detrimental impact on air quality and human health. However, carbon dioxide is not considered a criteria air pollutant because it does not directly cause harm to human health or the environment in the same way as pollutants like ozone or particulate matter.

Question 16 asks about the percentage of carbon monoxide (CO) emissions from mobile sources in Santa Clara County. While the exact percentage is not provided in the question, the closest answer option is 50%. However, it is important to note that the precise percentage may vary depending on specific local conditions and emissions sources.

Question 17 inquires about the criteria air pollutant most synonymous with the term "photochemical smog." Photochemical smog is primarily associated with high levels of ground-level ozone (O3). Ozone is formed when nitrogen oxides (NOx) and volatile organic compounds (VOCs) react in the presence of sunlight, creating a hazy and polluted atmospheric condition.

Question 18 addresses the concept of "attainment" of ambient air quality standards. To achieve attainment, measured concentrations of pollutants at all monitoring stations within an air district must be below the established ambient air quality standards. This ensures that the air quality in the given area meets the required standards for protecting human health and the environment.

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Answer:

Proton donor - H2CO3

Proton acceptor - H2O

Explanation:

The balanced reaction is

H2CO3 +H2O---------HCO3 - + h3O+

Here, water molecule i.e H2O has one additional H + ion hence it has accepted the hydrogen atom.

This additional hydrogen atom has been donated by H2CO3 thereby reducing itself to HCO3-

Hence,

Proton donor - H2CO3

Proton acceptor - H2O

In the given reaction, a proton donor is H₂CO₃ and proton acceptor is H₂O.

Bronsted-Lowry theory states that those substances which gives proton or (H⁺ ion) are known as acids and those which accepts proton or (H⁺ ion) are known as bases.

Given chemical reaction is:

H₂CO₃ + H₂O → HCO₃⁻ + H₃O⁺

In the above reaction H₂CO₃ gives H⁺ ion to the water molecule and H₂O accepts H⁺ ion for the formation of HCO₃⁻ & H₃O⁺. So, H₂CO₃ is a proton donor and behaves as acid and H₂O is a proton acceptor and behaves as base.

Hence, H₂CO₃ is a proton donor and H₂O is a proton acceptor.

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In the second diagram, the water moves out from the cell to the surroundings. This is because the surroundings of the cell have a higher concentration of salt than the cell. Hence, the water moves out of the cell to a higher concentration.

Answer:

The red blood cell shrank because water moved out of the cell, which happened because the concentration of salt outside the cell was greater than the concentration of salt inside the cell. Because the salt molecules take up space in the salt water, the concentration of water outside the cell was less than the concentration of water inside the cell. Therefore, water moved out of the cell from the area of high concentration to the area of low concentration, causing the cell to shrink.

First, we write down our reaction:

N2 + 3H2 → 2NH3

Don't forget to balance it.

We only use moles as units.

Procedure:

3 x 1 mole H2 ------------ 2 x 1 mole NH3

3.1 moles H2 ------------- x

x = 2.1 moles NH3 are produced

Answer: 2.1 moles NH3

Answer:

0.0917 mol Co(CrO₄)₃

General Formulas and Concepts:

Chemistry - Atomic Structure

Explanation:

Step 1: Define

37.3 g Co(CrO₄)₃

Step 2: Identify Conversions

Molar Mass of Co - 58.93 g/mol

Molar Mass of Cr - 52.00 g/mol

Molar Mass of O - 16.00 g/mol

Molar Mass of Co(CrO₄)₃ - 58.93 + 3(52.00) + 12(16.00) = 406.93 g/mol

Step 3: Convert

\(37.3 \ g \ Co(CrO_4)_3(\frac{1 \ mol \ Co(CrO_4)_3}{406.93 \ g \ Co(CrO_4)_3} )\) = 0.091662 mol Co(CrO₄)₃

Step 4: Check

We are given 3 sig figs. Follow sig fig rules and round.

0.091662 mol Co(CrO₄)₃ ≈ 0.0917 mol Co(CrO₄)₃

Answer: 1.90834 X 10 ^ 24

Explanation:

Molar mass Na2SO4 = 23x2+ 32+16X4

= 142g/mol

Mass of Na2SO4 = 450g

Moles of Na2SO4 = mass/ molar mass

= 450g/142g/mol = 3.170 mol

Avogadro's number = 6.02X 10 ^ 23/mol

Number of molecules = moles X avogadro's number

= 3.17 X 6.02X 10^ 23 = 1.90834 X 10 ^ 24 molecules

Therefore the number of molecules of Na2SO4 is1.90834 X 10 ^ 24

Answer:

kinetic

Explanation:

Kinetic energy is the energy of motion. Both the swinging bat and the pitched ball possess kinetic energy, which is generated by the players who swing the bat and throw the ball.