A student has 20.0ml of 6.96 M CaCl2 solution the student adds water si the final volume of the solution is 250.0mL determine the new molarity of the solution

Answer: Sulfur

Explanation: Sulfur has 16 protons, silicon has 14 protons, and gold has 79 protons.

Answer:

d

Explanation:

Answer:

Crudeoil is a mixture and it comprises of compounds mostly hydri carbons i think

The mass of an object in a given space is known as its relativistic mass.

The system's mass as it will be determined by a scale just might be the relativistic mass, however, in some instances (such as the box above), this fact only holds true since this system must typically be at rest in order to be measured .

For instance, if an electron in such a cyclotron is traveling in circles at a relativistic velocity, its relativistic mass rather than its rest mass increases the mass of the cyclotron and electron system.

Therefore, The mass of an object in a given space is known as its relativistic mass.

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Answer:

utcluclult

Explanation:

ciyiclyipc6ycpicyplciplcylpycioiycciptclyltcj"<&%(""%<(

Answer:

no WAYYYYYYY ITS SO EASY!!111!11

Explanation:

Answer:

It the acid easier to handel

The reaction would tend to proceed in the reverse direction, resulting in an increase in the concentrations of \(SO_2\) and \(O_2\), and a decrease in the concentration of \(SO_3\), until equilibrium is reached.

The reaction between sulfur dioxide (\(SO_2\)) and oxygen (\(O_2\)) to form sulfur trioxide (\(SO_3\)) is an exothermic reaction. According to Le Chatelier's principle, at high temperatures the equilibrium position of an exothermic reaction shifts towards the reactants side. Therefore, the reaction would tend to proceed in the reverse direction.

The balanced chemical equation for the reaction is:

\(2SO_2(g) + O_2(g) = 2SO_3(g)\)

The initial moles of the reactants are:

n(\(SO_2\)) = 0.200 mol

n(\(O_2\)) = 0.300 mol

n(\(SO_3\)) = 0.500 mol

To determine the reaction quotient Q, we divide the product of the concentrations of the products (raised to their stoichiometric coefficients) by the product of the concentrations of the reactants (raised to their stoichiometric coefficients):

\(Q = [SO_3]^2 / ([SO_2]^2 * [O_2])\)

Substituting the initial concentrations into the expression for Q:

Q = (0.500 mol/dm^3)^2 / ((0.200 mol/dm^3)^2 x (0.300 mol/dm^3))

Q = 20.83

The reaction quotient Q is greater than the equilibrium constant Kc at 1000K for this reaction, which is around 1. Hence, the reaction is not at equilibrium and will shift in the reverse direction to reduce Q. This means that some of the sulfur trioxide will react to produce sulfur dioxide and oxygen.

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The way that we represent a compound on the paper is that we have to draw the Lewis structure of the compound. This is the structure that can show the way that the atoms are connected including the kind of bonds and also the non bonding electrons that can be seen in the compound as we have it here.

We have to look out for the kind off orbital hybridization that has taken place in each one of the compounds that are shown in the 1question and this would now give us a clue as to what the accurate shape of the molecule that is under consideration should be here.

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Answer:

DDT (dichloro-diphenyl-trichloroethane) was developed as the first of the modern synthetic insecticides in the 1940s. It was initially used with great effect to combat malaria, typhus, and the other insect-borne human diseases among both military and civilian populations.

Ozone is a naturally occurring molecule. An ozone molecule is made up of three oxygen atoms. It has the chemical formula O3.

Explanation:

It is commonly used as a fire extinguishing agent. The reason it has so much ozone depleting potential is because it contains bromine, which has many times the ozone depleting potential of chlorine.

Ferrihydrite in forest soil at pH=5 is more likely to sorb benzene than 2,4-D. At pH=4, the sorption potential of 2,4-D to ferrihydrite may be enhanced due to increased positive charge on the surface of the hydroxide.

Ferrihydrite, a type of iron oxide, has the ability to sorb organic compounds through various mechanisms such as surface complexation, hydrogen bonding, and hydrophobic interactions. Benzene, being a non-polar compound, is more likely to sorb to ferrihydrite due to hydrophobic interactions and weak van der Waals forces. On the other hand, 2,4-D, being a polar compound, may have limited sorption to ferrihydrite at pH=5 due to the dominance of repulsive interactions between the negatively charged surface of ferrihydrite and the negatively charged 2,4-D molecule.

At pH=4, the increased positive charge on the surface of ferrihydrite enhances the sorption potential of 2,4-D. The positive charge can attract and bind with the negatively charged 2,4-D molecule through electrostatic interactions. This can result in increased sorption of 2,4-D to ferrihydrite in tropical soils like Qxisol.

Conversely, at pH=9, the increased pH results in a decrease in the positive charge on the surface of ferrihydrite. This reduction in positive charge limits the sorption potential of 2,4-D as the electrostatic attraction between the hydroxide and the 2,4-D molecule decreases. This suggests that in arid soils like Aridisol, characterized by higher pH levels, the sorption potential of 2,4-D to ferrihydrite may be lower compared to humid climates.

The sorption potential of 2,4-D as a function of soil type in humid vs. arid climates can be predicted by considering the pH of the soil. Higher pH in arid soils can lead to reduced sorption of 2,4-D to hydroxides like ferrihydrite or goethite, while lower pH in humid soils can enhance the sorption potential due to increased positive charge on the hydroxide surface.

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Answer: 0.071 moles of excess reactant \((O_2)\) will be left over.

Explanation:

To calculate the moles, we use the equation:

\(\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar mass}}\)

a) moles of \(NO\)

\(\text{Number of moles}=\frac{21.6g}{30.01g/mol}=0.720moles\)

b) moles of \(O_2\)

\(\text{Number of moles}=\frac{13.8g}{32g/mol}=0.431moles\)

\(2NO(g)+O_2(g)\rightarrow 2NO_2(g)\)

According to stoichiometry :

2 moles of \(NO\) require 1 mole of \(O_2\)

Thus 0.720 moles of  \(NO\) require=\(\frac{1}{2}\times 0.720=0.360moles\) of \(O_2\)

Thus \(NO\) is the limiting reagent as it limits the formation of product and \(O_2\) is the excess regaent.

moles of \(O_2\) left = (0.431-0.360) = 0.071 moles

The phenomenon where heat is trapped by the atmosphere is called the (c) greenhouse effect.

This natural process plays a crucial role in maintaining Earth's temperature and supporting life as we know it. The greenhouse effect occurs due to certain gases in the Earth's atmosphere, known as greenhouse gases, which include carbon dioxide (CO2), methane (CH4), nitrous oxide (N2O), and water vapor (H2O). These gases have the ability to absorb and re-emit heat energy radiated by the Earth's surface.

When sunlight reaches the Earth's surface, it warms the planet. Some of this heat is then radiated back into space as infrared radiation. However, greenhouse gases in the atmosphere trap a portion of this outgoing heat, preventing it from escaping into space. Instead, they redirect it back towards the Earth's surface, causing a warming effect.

This phenomenon is analogous to the way a greenhouse functions, where glass panels trap heat inside, creating a warmer environment for plants. Hence, the term "greenhouse effect" is used to describe this natural process occurring in Earth's atmosphere.

However, human activities, particularly the burning of fossil fuels and deforestation, have significantly increased the concentration of greenhouse gases in the atmosphere. This enhanced greenhouse effect, often referred to as global heating or global warming, is causing the Earth's average temperature to rise, leading to various consequences such as melting ice caps, rising sea levels, shifts in weather patterns, and ecosystem disruptions.

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Since fluorine is the most electronegative element in the periodic table, it will always attract electrons away from other elements in an ionic bond therefore, option c is the right choice.

When there is an electron exchange between the atoms that results in the development of ions, an ionic bond, also known as an electrovalent bond, is the sort of bond that is created between the two elements.

While the other atom acquires the electron and develops a negative charge and forms an ion known as the anion, the atom that loses an electron develops a positive charge and creates an ion known as the cation.

Due to the two atoms' opposing electric charges, they are drawn to one another and form an ionic connection.

Ionic compounds are brittle, rigid, and effective electrical conductors.

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The true statement about dimethyl ether is B. It is a nonpolar compound.

In dimethyl ether, the oxygen atom is more electronegative than carbon, resulting in a polar covalent bond between carbon and oxygen. However, the two methyl groups on either side of the oxygen atom balance out the polarity, making the overall molecule nonpolar. This is because the methyl groups have similar electronegativity and symmetry, canceling out any dipole moments.

Option A is incorrect because the boiling point of dimethyl ether (-23.6 °C) is significantly lower than the boiling point of ethanol (78.4 °C).

Option C is incorrect because dimethyl ether molecules are held together by relatively weak intermolecular forces, such as London dispersion forces, rather than strong attractive forces.

Option D is incorrect because the carbon bonded to oxygen in a dimethyl ether molecule does not carry a partially positive charge. It is partially negative due to the electronegativity of oxygen.

Therefore, the correct answer is option B: Dimethyl ether is a nonpolar compound.

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Answer:

standard carbon atom

Explanation:

Answer:

Explanation:

This is an isotope of carbon, more specifically, carbon-14. Carbon 14 has 6 protons, making the element carbon, and eight neutrons since 14-6 = 8.

Answer:

iron deficiency

Explanation:

The equilibrium concentration of CH3CN in the given reaction is 0.37 M.

To determine the equilibrium concentration of CH3CN, we need to set up an ICE table and use the equilibrium constant (Kc) to calculate the changes in concentration.

The balanced chemical equation for the reaction is:

CH3NC(g) ⇌ CH3CN(g)

We are given that the initial concentration of CH3CN is 0.56 M.

Let's assume that x is the change in concentration of CH3CN at equilibrium.

The ICE table is as follows: CH3NC(g) ⇌ CH3CN(g)

Initial:        -              0.56 M

Change:        -x              +x

Equilibrium:   -x              0.56 M + x

From the given equilibrium constant, Kc = 11, we can write the expression for the equilibrium constant as:  

Kc = [CH3CN]/[CH3NC]

Substituting the equilibrium concentrations into the expression, we have:

11 = (0.56 M + x)/(-x)

Simplifying the equation, we get:

11(-x) = 0.56 M + x

-11x = 0.56 M + x

-12x = 0.56 M

x = (0.56 M)/(-12) = -0.047 M

Since the concentration cannot be negative, we take the absolute value:

x = 0.047 M

The equilibrium concentration of CH3CN is given by 0.56 M + x:

Equilibrium concentration of CH3CN = 0.56 M + 0.047 M = 0.607 M ≈ 0.37 M

Therefore, the equilibrium concentration of CH3CN is approximately 0.37 M.

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Answer:

The heating of the Earth's surface and atmosphere by the sun drives convection within the atmosphere and ocean. This convection produces winds and ocean currents. The greater the pressure differences between a low-pressure area and a high-pressure area, the stronger the winds. I hope this helps

The sun heats the air near the equator of the earth, it becomes less dense and rises upward. As warm air rises, it cools and gets less dense than the air around it.

Convection can be d defined as the transfer of heat from one place to another due to the movement of heat or fluid. Convective heat transfer involves the processes of conduction as well as advection.

Gases and liquids can not be good conductors of heat under normal conditions, but they can easily transfer heat.

Convection occurs through diffusion or advection but does not take place in solids, as there is no movement of its constituent particles happens. The diffusion of heat in solids is known as thermal conduction.

The heat transfer that occurs between a surface and a liquid that is in contact with the surface is convection heat transfer.  

The Sun provides the energy for the convection in the ocean and produces ocean currents. There are two kinds of ocean currents: one is surface currents and the other deep currents.

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The option that is not a known advantage of natural gas over other fossil fuels is: C. It is far more abundant than any other fossil fuel.

Natural gas has several advantages over other fossil fuels. Firstly, it burns more completely than other fossil fuels, which means it produces fewer pollutants and greenhouse gases.

This leads to the second advantage, as natural gas burns more cleanly than other fossil fuels, resulting in reduced emissions of pollutants such as sulfur dioxide, nitrogen oxides, and particulate matter.

However, when it comes to abundance, natural gas is not necessarily more abundant than other fossil fuels.

While natural gas reserves can be substantial, the availability and reserves of other fossil fuels like coal and oil are also significant. Therefore, option C is not a known advantage of natural gas over other fossil fuels.

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The correct answer is option D.

The statement that formed the basis of Dalton’s atomic theory is atoms are the smallest particles of matter and cannot be divided farther.

In 1808, Dalton presented a theory named atomic theory which suggests that atoms are the smallest particles of an element and it is impossible to divide them further.

According to his theory every element is composed of these tiny particles.

Furthermore, his theory suggests that atoms neither can be divided nor destroyed.

In a particular matter, for example gold, all atoms have similar properties while their mass varies for every single different element.

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The complete question is:

Which of these statements is one of the conclusions that formed the basis of Dalton’s atomic theory?

a. Atoms can only change into atoms of another element through nuclear reactions.

b. Atoms of gases have less mass than atoms of liquids and solids.

c. Atoms of a particular element all have the same number of protons.

d. Atoms are the smallest particles of matter and cannot be divided farther.

Answer:

Isotope 2

Explanation:

Isotope 2 is the most abundant. Its percent abundance is 78.68% which is the largest percentage, and therefore the most common of the isotopes presented.

Good luck!

If the hydrogen gas is combusted and produces 645L of water vapor at 400 kelvin and 1.75 atm, 2796.96 g mass of the zinc is produced .

Using the ideal gas law equation:

PV = nRT

n = (PV) / (RT)

= (1.75 atm * 645 L) / (0.0821 atm·L/(mol·K) * 400 K)

= 42.71 moles

the balanced equation for the reaction between zinc and hydrochloric acid:

Zn + 2HCl -> \(ZnCl_{2}\)  + \(H_{2}\)

1 mole of zinc produces 1 mole of hydrogen gas. Therefore, the moles of zinc are also 42.71.

The molar mass of zinc is 65.38 g/mol.

Mass of zinc = moles of zinc * molar mass of zinc

= 42.71 moles * 65.38 g/mol

= 2796.96 g

Therefore, the mass of the zinc is 2796.96 grams.

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The coefficients of the species shown when the equation n2 + Br- + N2H4 → N2 + Br- + NH3 are balanced properly under basic conditions are 1, 2, and 2 for N2, Br-, and N2H4, respectively.

To balance the equation, start by balancing the nitrogen atoms by placing a coefficient of 2 in front of N2 and N2H4. This gives the equation 2N2 + Br- + N2H4 → 2N2 + Br- + NH3. Next, balance the hydrogen atoms by placing a coefficient of 2 in front of NH3. The equation then becomes 2N2 + Br- + N2H4 → 2N2 + Br- + 2NH3. Finally, balance the charge by adding OH- to the reactants side of the equation.

The final balanced equation is 2N2H4 + 6OH- + Br- → 4NH3 + 2N2 + 3H2O + Br-. Therefore, the coefficients for the species shown are 1 for Br-, 1 for N2, and 2 for N2H4.

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Answer:

phosphorous(iii) oxide

Explanation:

Hope this helps! :)

An electric field is produced when high voltage is applied to capacitor plates, deflecting cathode rays. The negatively charged electrons are directed away from the negatively charged plate and toward the positively charged plate when a cathode ray is transmitted through this electric field.

Electricity is the set of physical phenomena associated with the presence and motion of matter that has a property of electric charge. Electricity is related to magnetism, both being part of the phenomenon of electromagnetism, as described by Maxwell's equations

Voltage, current, and resistance are the three most fundamental elements of electricity. Voltage is comparable to the force that forces water through a hose. It is expressed as volts (V). CURRENT is comparable to the hose's diameter.

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The molarity of a commercial grade of HCl solution with a density of 1.20 g/ml is 12.8 M.

The term "molar concentration" (also known as "molarity," "amount concentration," or "substance concentration") refers to the amount of a substance per unit volume of solution and is used to describe the concentration of a chemical species, specifically a solute, in a solution.

The most common measure of molarity in chemistry is the number of moles per litre, denoted by the unit symbol mol/L or mol/dm3 in SI units. A solution with a concentration of 1 mol/L is referred to as 1 molar, or 1 M. The most popular unit of measurement for molal concentration or molarity is moles of solute per litre of solution.

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No, diatomic elements cannot exist as single atoms.

Diatomic elements are those that naturally occur as a molecule of two atoms of the same element, such as oxygen (O2), nitrogen (N2), and hydrogen (H2). These elements are chemically stable in their diatomic form and have strong covalent bonds that keep the atoms together.

It is thermodynamically unfavorable for diatomic elements to exist as single atoms, as the energy required to break the covalent bond is very high. Therefore, diatomic elements will always exist as a molecule of two atoms. This can be observed in their physical and chemical properties, which are unique to the diatomic form of the element.

Overall, diatomic elements are a unique class of elements that exist naturally as molecules of two atoms. It is not possible for them to exist as a single atom due to their strong covalent bond.

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Answer:

55,000,000

Explanation:

550 hectometers [hm] = 55,000,000 millimeters [mm]

Answer:

1 mole is equal to 1 moles Al, or 26.981538 grams.

Explanation:

171.3327663

1623.0250764

The mass in grams of the following is required.

The mass of Al is 171.323 g.

The mass of P is 1622.8 g.

M = Molar mass of Al = 26.98 g/mol

n = Number of moles = 6.35 mol

Mass is given by

\(m=nM\\\Rightarrow m=6.35\times 26.98\\\Rightarrow m=171.3\ \text{g}\)

The mass of Al is 171.323 g.

M = Molar mass of P = 30.97 g/mol

n = Number of moles = 52.4 mol

Mass is given by

\(m=nM\\\Rightarrow m=52.4\times 30.97\\\Rightarrow m=1622.8\ \text{g}\)

The mass of P is 1622.8 g.

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