when a reaction is properly refluxing, where should you see the vapors from the heated mixture?

Answer: protons and neutrons

Explanation: both of those subatomic particles are located in the nucleus and account for 99.99% of atomic mass

The subatomic particles that account for most of an atom's mass and volume are the neutrons and the protons.

Neutrons and protons are subatomic particles found in the nucleus. They are collective called nucleons.

The neutron has no charge but it contributes to the mass of the atom. The proton is positively charged and is 1840 times heavier than the electron.

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Answer: Encoded messages are sent to the receiver for decoding through a channel, or a sensory route on which a message travels. While communication can be sent and received using any sensory route (sight, smell, touch, taste, or sound), most communication occurs through visual (sight) and/or auditory (sound) channels.

Explanation:

Answer:

0.0875M of Acetic Acid

Explanation:

Based on the reaction of acetic acid (HX) with sodium hydroxide (NaOH):

HX + NaOH → NaX + H₂O

1 mole of acetic acid reacts with 1 mole of NaOH

That means the moles of sodium hydroxide added = Moles the acetic acid at the equivalence point.

To solve this question we have to find the moles of NaOH = Moles HX. With the moles and the volume (25.0mL = 0.0250L) we can find the molarity of the acetic acid:

Moles NaOH = Moles Acetic acid:

12.5mL = 0.0125L * (0.175mol / L) = 0.00219 moles Acetic Acid

Molarity acetic acid:

0.00219 moles Acetic Acid / 0.0250L =

Answer:

94.15

Explanation:

Answer:

no molecules are very small atoms

Answer: group 1A (or IA)

Explanation:

The student should pour out approximately X mL of dimethyl sulfoxide.

Dimethyl sulfoxide (DMSO) is a commonly used solvent in chemistry experiments. To determine the volume of DMSO needed, the student needs to know its density. Unfortunately, the density value is missing from the question, so it's not possible to provide an exact answer. However, by consulting the CRC Handbook of Chemistry and Physics or other reliable sources, the student can find the density of DMSO, which is typically around 1.10 g/mL.

Using this density value and the given mass, the student can calculate the volume of DMSO needed by dividing the mass by the density. The result will provide the volume in milliliters (mL). It is important to round the answer to the appropriate significant digits based on the given data and the desired level of precision.

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Answer:

The right option is (c) toaster

The frequencies and wavelengths of light in the emission spectrum of the Be3+ ion for the first three lines of each of the series that are analogous to the Lyman and the Balmer series are 48.8 eV, 97.6 eV, and 146.4 eV respectively, and wavelengths of 254 nm, 126 nm, and 84 nm respectively. This radiation lies in the ultraviolet region of the spectrum.

The frequencies and wavelengths of light in the emission spectrum of the Be3+ ion can be determined by calculating the energy of the electron in the ground state and in each of the excited states. The ground state energy of the ion is -13.6 eV.

The energy of the first three excited states of the ion is calculated by subtracting the ground state energy from the ionization energy, which is 13.6 eV. The frequencies and wavelengths of light of the three excited states are then calculated using the equation E=hv, where h is Planck's constant and v is the frequency of the light.

The wavelengths of light in the emission spectrum of the Be3+ ion for the first three lines of each of the series that are analogous to the Lyman and the Balmer series are 254 nm, 126 nm, and 84 nm respectively. These frequencies and wavelengths of light lie in the ultraviolet region of the spectrum.

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Complete question:

Be^3+ has a single electron. Calculate the frequencies and wavelengths of light in the emission spectrum of the ion for the first three lines of each of the series that are analogous to the Lyman and the Balmer series of neutral hydrogen. In what region of the spectrum does this radiation lie?

Answer:

D) The attractive force decreases as the atom gets larger.

Explanation:

i did the lesson and tried all 3, all 3 times, this was the last one and only choice left so it has to be.

Answer:

The attractive force decreases as the atom gets larger.

Explanation:

Equilibrium constant is a unitless quantity because it is a ratio of concentrations of products and reactants and the units of concentration cancel out.

The equilibrium constant (K) is a unitless quantity because it is a ratio of the concentrations of the products to the concentrations of the reactants, with each concentration raised to the power of its stoichiometric coefficient.

Since the units of concentration cancel out in the ratio, the equilibrium constant is a pure number and does not have any units.

For example, consider the equilibrium reaction:

A + B ⇌ C + D

The equilibrium constant for this reaction is:

K = [C][D]/([A][B])

where the square brackets will denote the concentrations of the species.

The concentrations of the species could be measured in units such as moles per liter (mol/L) or millimoles per liter (mmol/L), but when we take the ratio of the product concentrations to reactant concentrations, the units cancel out, leaving us with a unitless quantity.

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The end of a very long 5-mm-diameter rod is held at 124°C. The surface of the rod is exposed to ambient air at 30°C, with a convective heat transfer coefficient of 100 W/m2K. Determine the temperature at a radial distance of 2.5 mm from the rod's center. The thermal conductivity of the rod is 15 W/mK.b) What is the temperature gradient in the rod at this location?c).

What is the heat flux at this location?The temperature at a radial distance of 2.5 mm from the rod's center is 79.58°C.The solution for this problem can be found by following the steps below:Solution:a) The temperature of the rod, T, can be calculated using the formula for one-dimensional conduction:q/A = -k (d T/d r)whereq is the heat flux,A is the cross-sectional area of the rod,r is the radial distance from the center of the rod,k is the thermal conductivity of the rod,and T is the temperature of the rod.

Taking the boundary condition into account,T(r=0) = 124°CandT(r=2.5 mm) = 30°C, the solution to the differential equation is:T = T0 + (T1 - T0) (r/R)2whereT0 = 30°CT1 = 124°CR = 2.5 mm/2 = 1.25 mmso,T = 30 + (124 - 30) (r/1.25)2 = 30 + 78 (r/1.25)2at r = 2.5 mm,T = 79.58°Cb) The temperature gradient, d T/d r, is given by the derivative of the above equation:d T/d r = 124 (r/1.25)2 / 1.25where d T/d r = 98.72°C/mat r = 2.5 mmc) The heat flux, q/A, is given by the Fourier's law of heat conduction:q/A = -k (d T/d r)whereq/A = -15 (98.72/1000) = -1.48 W/m2at r = 2.5 mmTherefore, the temperature at a radial distance of 2.5 mm from the rod's center is 79.58°C, the temperature gradient in the rod at this location is 98.72°C/m, and the heat flux at this location is -1.48 W/m2.

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The beryllium ion has a charge of +2 and the fluorine ion has a charge of -1.

Fluorine is a chemical element on the periodic table with an atomic number of nine and a symbol of F. It is the most reactive of all elements, and is the only element that forms compounds with all other elements. It is a pale yellow gas with a pungent odor. It readily forms compounds with most metals and nonmetals, and is found in many minerals. Fluorine is used in industries such as glass, ceramics, and aluminum production. It is also used to produce uranium fuel for nuclear power plants. Fluorine is widely used in toothpaste, mouthwash, and other dental products to prevent tooth decay.

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Answer:

Iodine is a mineral found in some foods. The body must have iodine to make thyroid hormones. The hormones control the body's metabolism and many other important functions. Without iodine, thyroid hormone production can decrease.

Explanation:

Answer:" For example, when hydrogen gas, H2(g), is burned in the presence of gaseous oxygen, O2(g), a new substance, liquid water, H2O(l ), forms. The covalent bonds within the H2 molecules and O2 molecules break, and new covalent bonds form between oxygen atoms and hydrogen atoms (Figure 7.1)."

Explanation:

The maximum number of electrons that can occupy 2p orbitals is six.

In atomic theory, each orbital has a maximum capacity for two electrons, one with a spin-up (+1/2) and the other with a spin-down (-1/2). The 2p orbitals consist of three separate orbitals labeled as 2px, 2py, and 2pz. These orbitals are oriented along the x, y, and z axes, respectively.

Since there are three 2p orbitals, the total number of electrons that can occupy them is 2 electrons per orbital x 3 orbitals = 6 electrons. This means that each of the 2p orbitals can accommodate a maximum of two electrons.

The 2p orbitals are higher in energy than the 2s orbital, and they are typically filled after the 2s orbital in the electron configuration of atoms. Understanding the maximum electron capacity of orbitals is important for determining the electronic structure and chemical behavior of elements.

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Answer:

A

Explanation:

Determine the mass number for each of the isotopes, which is obtained by adding the number of protons and the number of neutrons. Hence, isotope A has a mass number of 1, isotope B has a mass number of 2, and isotope C has a mass number of 3. To determine the average atomic mass, we multiply the atomic mass of each isotope by its abundance. Hence, we obtain (0.99985 × 1 amu) + (0.00015 × 2 amu) + (0.00 × 3 amu) = 1.00 amu

Secondary pollutants are produced in the air as a part of photochemical smog resulting from a chemical reaction in the presence of sunlight.

The secondary pollutants are the type of pollutants that are formed as a result of combination of two or more primary pollutants in the presence of sunlight.

Examples of secondary pollutants include the following:

Therefore, Secondary pollutants are produced in the air as a part of photochemical smog resulting from a chemical reaction in the presence of sunlight.

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Answer:

D) Physical property

Explanation:

"A physical property is a characteristic of matter that can be observed and measured without changing the chemical identity of the sample," like color.

Answer:

b

Explanation:

asdasd

Answer:

more rounded the grains are the more they have been moved around

Explanation:

Generally – the more rounded the grains are the more they have been moved around (i.e. the longer the length of time or distance they have moved). Angular grains cannot have travelled far

geolsoc.org.uk

Answer:

They live in the open snow

Explanation:

The mass of aluminum chloride formed during the neutralization reaction of aluminum hydroxide and hydrochloric acid is 10.43g.

The balanced chemical equation for the reaction is as follows:`

Al(OH)_{3} + 3HCl \rightarrow  AlCl_{3} + 3H2O

To calculate the mass of aluminum chloride produced, we first need to determine the limiting reactant between the aluminum hydroxide and hydrochloric acid in the reaction. Then we will use the stoichiometry of the balanced equation to find the mass of aluminum chloride formed.

Molar mass of HCl = 1.00794 + 35.453 = 36.46094 g/mol

Number of moles of HCl = Mass of HCl/Molar mass of HCl= 15.57/36.46094= 0.427 mol

The balanced equation for the reaction shows that the stoichiometry of aluminum hydroxide and hydrochloric acid is 1:3. That is, one mole of aluminum hydroxide reacts with three moles of hydrochloric acid to produce one mole of aluminum chloride.

Therefore, the amount of aluminum hydroxide needed to react with 0.427 moles of HCl is = Number of moles of Al(OH)_{3} = 0.427/3 = 0.142 mol

The actual mass of aluminum hydroxide used is not given but it is stated that there is excess of it in the reaction. So we can assume that all the hydrochloric acid reacts with the aluminum hydroxide.

We know that the actual yield of the reaction is 55.1%. Therefore, the theoretical yield of aluminum chloride can be calculated as follows: Theoretical yield of AlCl_{3} = Number of moles of Al(OH)_{3} x Molar mass of AlCl_{3} = 0.142 x [26.98 + 3(35.45)] = 0.142 x 133.33 = 18.93g.

Therefore, the actual yield of aluminum chloride is 55.1% of the theoretical yield, which is: Actual yield of AlCl_{3} = 0.551 x 18.93 = 10.43g.

Therefore, the mass of aluminum chloride formed is 10.43 g.

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Answer: The metal is held together by the strong forces of attraction between the positive nuclei and the delocalized electrons (The Electron Sea Model.

Explanation: I hope that helped!

a) The concentration of N_2O_4 in the container after one half-life of the reaction is 1.4 moll L.

b) The concentration after 60 seconds is option B 0.60 M.

What are the 3 types of concentration?

The three types of concentration commonly used in chemistry are:

Molarity (M): This is the most commonly used type of concentration, and it is defined as the number of moles of solute per liter of solution. Molarity is represented by the symbol "M".

Molality (m): This is a concentration unit that measures the number of moles of solute per kilogram of solvent. Molality is represented by the symbol "m".

Mass Percent (%m/m): This is a concentration unit that measures the mass of solute per 100 grams of solution. It is also called weight percent. Mass percent is represented by the symbol "%m/m".

The explanation of the answer is given below.

Therefore, The concentration of N_2O_4 in the container after one half-life is 1.4 moll L and concentration after 60 seconds is 0.60 M.

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Answer: Revoke the driver's license for at least 12 months

Explanation:

Chemical tests are used in order to measure the amount of drugs or alcohol that is in the body of a person when the person was arrested. To do this, samples of the urine or blood of the person can be taken and the result will be used to know if the person was driving under the influence of alcohol or not.

If the person refuse a legal chemical test issued by a law enforcement officer, the Division of Motor Vehicles is required to revoke the the driver's license of the person for at least 12 months.