only question 5 plz i’m times

Answer:

In a periodic table the average atomic mass of magnesium is given as 24.312 u.

7.22 × 10³ grams of magnesium nitrate is equivalent to 4.306 × 10²⁵ molecules.

The number of molecules of a substance can be calculated by multiplying the number of moles in the substance by Avogadro's number as follows;

no of molecules = no of moles × 6.02 × 10²³

According to this question, 7.22 × 10³ grams of magnesium nitrate is given. The number of moles can be calculated as follows;

molar mass of Mg3N2 = 100.9494 g/mol

moles = 7.22 × 10³g ÷ 100.95g/mol = 71.52moles

no of molecules = 71.52 mol × 6.02 × 10²³

no of molecules = 4.306 × 10²⁵ molecules.

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Sorry this is late but it would be the air mass

Hope this halpes :))

Answer:

just getting 5 points

Explanation:

Answer:

The answer is 26.03728. We assume you are converting between grams C2H2 and mole. You can view more details on each measurement unit: molecular weight of C2H2 or mol This compound is also known as Acetylene. The SI base unit for amount of substance is the mole.

Explanation:

The solution is 26.03728. We assume you are converting between grams C2H2 and mole. You could view more information on each size unit: molecular weight of C2H2 or mol This compound is also called Acetylene. The SI base unit for the quantity of the substance is the mole.

The C2H2 molecule is product of sigma-bonds and pi-bonds, with a bond attitude of one hundred eighty ranges. This linear molecular geometry is similar to that of CO2 (Carbon dioxide), which is likewise a non-polar compound.

C2H2 has a linear molecular geometry because all the atoms are symmetrically aligned inside the same aircraft. Both Carbon atoms are inside the centre of the C2H2 Lewis structure due to the fact they may be much less electronegative than Hydrogen atoms.

The chemical formulation for acetylene is C2H2 and the chemical composition for carbon monoxide is CO. There are 2 carbon atoms in every acetylene molecule and 1 carbon atom in every carbon monoxide molecule. In each mol of any chemical substance, there are 6.022*10^23 molecules.

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Answer:

La distancia recorrida por el móvil es 228.600 m

Explanation:

El movimiento rectilíneo uniforme MRU es el movimiento que describe un cuerpo o partícula a través de una línea recta a velocidad constante. Es decir:, en este caso el movimiento es lineal en una única dirección  y la velocidad de desplazamiento es constante.

La velocidad es una magnitud física que expresa la relación entre el espacio recorrido por un objeto y el tiempo empleado para ello mediante la expresión:

\(velocidad=\frac{distancia}{tiempo}\)

En este caso:

Reemplazando:

\(25 \frac{m}{s} =\frac{distancia}{9144 s}\)

y resolviendo obtienes:

distancia= 25\(\frac{m}{s}\) *9144 s

distancia= 228.600 m

La distancia recorrida por el móvil es 228.600 m

A movement is rectilinear uniform when an "object" (for example) travels in a straight path at a constant speed, given that its acceleration is zero.

Velocity (v) = 25m/s

Distance (d) = ?

Time (t) = 2.54hr = 9,144 s

Looking at the data, we see that the time is in hr, but we need it in seconds. Therefore we do a conversion from hours to minutes, taking into account that 1 hour is equal to 3600 seconds.

To calculate the distance traveled by the mobile, the speed is multiplied by the time taken.

For this the following formula is applied:

We apply the data in the formula; to solve for the distance.

Answer: The distance traveled by the mobile is 228,600 meters.

Answer:

5

Explanation:

2NaClO3 --> 2NaCl +3O2

The mole ratio of NaClO3 to O2 is 2:3.

Thus, every 3 moles of O2 require 2 moles of NaClO3 .

7 moles of O2 will, therefore require:

 = 2 x7/3

   = 4.6666 moles of NaClO3

To the nearest whole number = 5 moles of NaClO3

*phew* it's a lot of work huh

Hope this helps :)

To produce 35.5g of H2, approximately 2055.49g of NaCl is required.

To calculate the mass of NaCl required to produce 35.5g of H2, we need to determine the stoichiometry of the reaction and use the molar mass of NaCl.

The balanced equation for the reaction is:

2NaCl + 2H2O -> 2NaOH + H2

From the balanced equation, we can see that for every 2 moles of NaCl, 1 mole of H2 is produced. We can use the molar mass of H2 (2.016g/mol) to convert the given mass of H2 into moles:

moles of H2 = mass of H2 / molar mass of H2

moles of H2 = 35.5g / 2.016g/mol

moles of H2 = 17.6 mol

Since the stoichiometry of the reaction is 2 moles of NaCl to 1 mole of H2, we can set up the following ratio:

moles of NaCl / moles of H2 = 2 / 1

Rearranging the equation to solve for moles of NaCl:

moles of NaCl = (moles of H2 * 2) / 1

moles of NaCl = (17.6 mol * 2) / 1

moles of NaCl = 35.2 mol

Now, we can calculate the mass of NaCl required using the molar mass of NaCl (58.44g/mol):

mass of NaCl = moles of NaCl * molar mass of NaCl

mass of NaCl = 35.2 mol * 58.44g/mol

mass of NaCl = 2055.49g

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In order to reduce the risk of radiation exposure to individuals and environmental contamination, radioactive wastes are kept. The wastes' radioactivity decreases over time.

Large steel and concrete barrels that contain the garbage are typically properly sealed, although accidents and leaks can still happen. Cancerous growths can result from the severe negative impacts of nuclear waste on life.

Currently, dry casks are used to store all of the nuclear waste that a power plant produces over the course of its lifetime. Since 1987, Yucca Mountain in Nevada has been intended as a permanent disposal location for spent nuclear material.

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Answer:

thank u for the points

Explanation:

The molar mass of the unknown gas is 8.05 g/mol.

The ratio of effusion of an unknown gas to oxygen is 0.50:1, which means that the effusion rate of the unknown gas is half that of oxygen. Effusion is the process by which a gas escapes through a tiny hole into a vacuum, and the rate of effusion is directly proportional to the square root of the gas' molar mass. So, we can use this relationship to calculate the molar mass of the unknown gas.

Let's assume that the molar mass of oxygen is 32 g/mol. Then, the square root of the molar mass of oxygen is √32 = 5.66. If the effusion rate of the unknown gas is half that of oxygen, then the square root of its molar mass is 0.5 * 5.66 = 2.83. Taking the square of 2.83 gives us 8.05, which is the molar mass of the unknown gas.

Therefore, the molar mass of the unknown gas is 8.05 g/mol.

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How many moles of tungsten atoms are in 4.8 * 10^25 atoms of tungsten?

Avogadro's number is the number of particles that we have in one mol of particles. It is 6.022 *10^23. For example: in 1 mol of atoms there are 6.022*10^23 atoms.

It's like a dozen. When we say a dozen atoms, we mean 12 atoms. So, when we say a mol of tungsten atoms, we mean 6.022 *10^23 atoms of tungsten.

1 mol of atoms of tungsten = 6.022 *10^23 atoms of tungsten

We will use that relationship to find the number of moles of tungsten atoms that we have in 4.8 *10^25 atoms of tungsten.

number of moles of tungsten atoms = 4.8 *10^25 atoms * 1 mol of atoms/(6.022 *10^23 atoms)

number of moles of tungsten atoms = 79.7 moles = 8 *10^1 moles

number of moles of tunsten atoms = 8.10^1 moles

Answer: b) 8*10¹ moles

According to the relation of variables in the electromagnetic spectrum the maximum wavelength of light is 36.3 ×10\(^-\)³¹ m.

The  electromagnetic spectrum consists of electromagnetic radiation consists of waves made up of electromagnetic field which are capable of propogating through space and carry the radiant electromagnetic energy.

The radiation are composed of electromagnetic waves which are synchronized oscillations of electric and magnetic fields . They are created due to change which is periodic in electric as well as magnetic fields.

In the given problem,energy is related to wavelength by the formula, λ=hc/E,λ=6.626×10\(^-34\)×3×10⁸/547×1000=36.3×10\(^-31\) m.

Thus, the maximum wavelength of light is 36.3×10\(^-31\) m.

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The molecule you have provided is not included in your question, so I cannot provide a direct answer.

However, in general, for a molecule to form hydrogen bonds with water, it must have hydrogen atoms that are covalently bonded to highly electronegative atoms such as oxygen, nitrogen, or fluorine. These hydrogen atoms then form hydrogen bonds with the lone pairs of electrons on the water molecules.

Therefore, the number of atoms in a molecule that can form hydrogen bonds with water depends on the presence of such covalently bonded hydrogen atoms and their accessibility to water molecules.

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Two possible sources of systematic (determinate) error in the experiment are; Incorrect calibration of volumetric glasswareIncorrect mass of NaCl

To calculate the concentration of NaCl in the resulting solution in mg/L NaCl, we can use the formula; Concentration (mg/L) = (Mass of solute ÷ Volume of solution in L) × 1000 g / 1 mg NaCl is present in the stock solution of 25 mL. So, the mass of NaCl in the solution would be;0.0842 g ÷ 25 mL = 0.00337 g/mL. Now, in the resulting solution, a 1.00 mL aliquot of the stock solution is transferred to a 50.00 mL volumetric flask and diluted to volume. Therefore, the volume of the resulting solution is 50.00 mL. We will substitute these values in the formula, Concentration (mg/L) = (0.00337 g/mL ÷ 50 mL) × 1000 g / 1 mg concentration (mg/L) = 67.4 mg/L. Therefore, the concentration of NaCl in the resulting solution in mg/L NaCl is 67.4 mg/L.7.  Concentration = 67.4 mg/LTolerance = 4.28 mg/LTotal concentration = 67.4 + 4.28 mg/L = 71.68 mg/LWe round off this value to one decimal place; Total concentration = 71.7 mg/LTherefore, the concentration of NaCl in the resulting solution using propagation of error through the calculation is 67.4+0.4 mg/L.8. Two possible sources of random (indeterminate) error in the experiment are; Errors in temperature measurement. Errors in measurement of water volume. Two possible sources of systematic (determinate) error in the experiment are; Incorrect calibration of volumetric glasswareIncorrect mass of NaCl.

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The volume of water added to dissolve potassium hydrogen phthalate (KHP) does not matter because the mass of KHP used is known and it will dissolve completely in any volume of water.

In volumetric analysis, the primary objective is to find the exact concentration of an analyte in a given solution. Analyte refers to the substance whose concentration is to be determined.In order to measure the analyte concentration, the known volume of the titrant of known concentration is added to the analyte until the endpoint is reached.Endpoint refers to the point in a titration where the reaction between the analyte and titrant is complete. The endpoint can be detected by observing a physical change in the system.In the case of KHP, it dissolves completely in any volume of water.

Therefore, the mass of KHP used can be accurately measured and dissolved in any volume of water. As a result, the volume of water added to dissolve the KHP does not affect the accuracy of the experiment.In summary, the volume of water added to dissolve KHP does not matter because the mass of KHP used is known and it will dissolve completely in any volume of water.

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The compound that will readily react with a solution of bromine consisting of 48% hydrobromic acid and 30% hydrogen peroxide is acetic acid.Hydrobromic acid is a solution of hydrogen bromide (HBr) in water.

It is a strong acid that can be used for several industrial purposes. Hydrogen peroxide is a reactive chemical with the chemical formula H2O2. When combined with hydrobromic acid, hydrogen peroxide forms a solution known as hydrobromic acid. Bromine is a non-metallic element that reacts with many compounds to form new substances.Acetic acid (CH3COOH) is a weak organic acid that is commonly found in vinegar and is used in the production of cellulose acetate.

When acetic acid is mixed with a solution of bromine containing 48% hydrobromic acid and 30% hydrogen peroxide, it reacts readily. This reaction will produce a new compound.The other three options (cyclohexane, dichloromethane, t-butyl alcohol, and cyclohexene) do not have any active functional groups such as an alcohol, carboxylic acid, or an unsaturated bond that can undergo halogenation or oxidation reactions. Therefore, they will not react with a solution of bromine consisting of 48% hydrobromic acid and 30% hydrogen peroxide.

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The reaction between pottasium metal and chlorine gas is an example of combination reaction and the balanced equation is as follows: 2K + Cl₂ → 2KCl

A chemical equation is a symbolic representation of a chemical reaction where reactants are represented on the left, and products on the right.

A chemical equation is said to be balanced when the number of atoms of each element on both sides of the equation are the same.

According to this question, potassium metal reacts with chlorine gas to form solid potassium chloride. The balanced equation is as follows:

2K + Cl₂ → 2KCl

Based on the above equation, pottasium combines with chlorine chemically to form pottasium chloride compound, hence, it is an example of combination reaction.

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The pH of a buffer solution can be calculated using the Henderson-Hasselbalch equation and it will be 3.99.

pH = pKa + log([A-]/[HA])

where:

pH is the desired pH

pKa is the negative logarithm of the acid dissociation constant (Ka)

[A-] is the concentration of the conjugate base

[HA] is the concentration of the weak acid

In this case, we know that:

pKa = -log(Kb) = -log(6.4×((10^(−5)))) = 4.19

[A-] = 0.290 M

[HA] = 0.520 M

Substituting these values into the Henderson-Hasselbalch equation, we get:

pH = 4.19 + log(0.290/0.520)

pH = 4.19 - 0.198

pH = 3.99

Therefore, the pH of the buffer solution is 3.99.

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Answer:

sodium proxide

Explanation:

Answer:

from hemp plant hashish is derived.

Explanation:

hope it's help ful

You will be allowed to attempt parallel parking only once during the on-road driving test, according to the Pennsylvania Driver's Manual.

According to the manual, you must park between two traffic cones or within a painted space 24 feet long and 8 feet wide. You must complete the manoeuvre inside of three minutes to within 12 inches of the curb without striking it. Specific criteria, such as proper use of turn signals, appropriate speed, distance from the curb, and other factors, will be scrutinised by the examiner. You may fail the driving test if you are unable to complete the parallel parking manoeuvre correctly on the first try.

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3C⁻⁻ on reaction with HI gives I⁻⁻⁻ as the main products and not H⁻ and C₂H₅I.

When 3C⁻⁻ is reacted with HI, the reaction product obtained is I⁻⁻⁻ as the main product. The C₂H₅I and H⁻ are not produced in significant quantities and cannot be considered the main product.The 3C⁻⁻ compound reacts with HI in the presence of a solvent to produce hydrogen gas, H⁻, C₂H₅I, and I⁻⁻⁻. The primary product obtained is I⁻⁻⁻ because it is stable and has a higher energy than C₂H₅I and H⁻.However, the reaction can be controlled to obtain C₂H₅I and H⁻ as the primary products by changing the reaction conditions. The reaction must be carried out in anhydrous conditions and at a low temperature so that the reaction proceeds in the desired direction.

3C⁻⁻ on reaction with HI gives I⁻⁻⁻ as the main products and not H⁻ and C₂H₅I. However, the reaction can be controlled to obtain C₂H₅I and H⁻ as the primary products by changing the reaction conditions.

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The required number of grams of magnesium to make 0.40 Liters of Hydrogen gas at STP is 0.43 grams.

Ideal gas equation gives idea about the behavior of gas at different condition & represented as:

PV = nRT, where

On putting values, we get moles as:

n = (1)(0.4) / (0.082)(273.15) = 0.0178 mol

Given chemical reaction is:

Mg + 2HCl → MgCl₂+ H₂

From the stoichiometry of the reaction:

0.0178 moles of H₂ = produced by the reaction 0.0178 moles of Mg

Mass of Mg = (0.0178mol)(24.3g/mol) = 0.43g

Hence required mass of magnesium is 0.43g.

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The ability of water to function as a versatile solvent arise from the structure of water molecules are because:

Water molecules form hydrogen bonds with atoms that are part of polar covalent bonds other molecules

Water's versatility as solvent arises from the polar covalent bonds of water molecules.

Hydrogen bond is an electrostatic attraction between two polar groups that occurs when a hydrogen atom (H), covalently bound to a highly electronegative atom such as flourine (F), oxygen (O) and nitrogen (N) atoms.

In water, atoms of hydrogen (H) and oxygen (O) are connected by polar covalent bonds.

Covalent bond is bond between nonmetals. Hydrogen and oxygen are nonmetals.

Solvation is the interaction of solvent (water) with molecules or ions (for example K⁺ and I⁻) in a solute.

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Answer:

I wanna say c

Explanation:

It makes the most sense, because non-metals don't produce an electrical current, and therefore aren't conductors.

Each C-H bond is formed by the overlap of an sp³ hybrid orbital from C and a 1s orbital from H.

Thus, the correct answers are sp³ hybrid; 1s.

Eаch C-H bond in methаne, then, cаn be described аs аn overlаp between а hаlf-filled 1s orbitаl in four hydrogen аtoms аnd the lаrger lobe of one of the four hаlf-filled sp³ hybrid orbitаls form а four equivаlent sigmа (σ) bond. This orbitаl overlаp is often described using the notаtion: sp³(C)-1s(H). The formаtion of sp³ hybrid orbitаls successfully explаins the tetrаhedrаl structure of methаne аnd the equivаlency of the four C-H bonds.

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\(E=hc/ \lambda\) is the equation for calculating the energy and wavelength of electron transitions in a one-electron system.

E = hv is the formula for calculating the energy of a single photon. It takes into account the energy in SI units of J, Planck's constant (h = 6.626 x 10-34 J s), and the frequency of the radiation in SI units of s-1 or Hertz, Hz. Wavelength and frequency are connected by the formula c/, where c is the speed of light, which is 2.998 x 108 m s-1.

The energy of the photon increases as the wavelength of light decreases. By dividing the aforementioned equation by Avogadro's number, one can determine the energy of a mole of photons with the wavelength

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