Ethanol is manufactured by two different process... for each process, name the organic reactant and state the type reaction​

using PV=mRT/Mr

V=(4.9×8.31×(273+20))/(24.3×101.5×10^3)

=4.84×10^-3 m^3

=4.84×10^6 mm^3

Answer:

basic

Explanation:

Answer:

23.175g

Explanation:

0.45 mole of NaBr is in 1 liter

? moles of NaBr is in 0.50 liter

0.50 × 0.45 = 0.225 of NaBr

1 mole of NaBr = 23 + 80 = 103g

0.225 moles of NaBr = ?

0.225 × 103 = 23.175g

Answer:

B. A method of obtaining an emission spectrum from a sample

Explanation:

Flame test is a method of obtaining an emission spectrum from a sample.

Emission spectrum is defined as a spectrum of a chemical compound or substance composed of frequencies of electromagnetic radiation. Radiations which are emitted while electron make transition from higher to lower energy level.

Energy of photon is equal to the difference between the two energy states . There are many possible electronic transitions in an atom and every transition has a specific wavelength.Flame test is characteristic for each element as that of an emission spectrum.

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Answer:

A.hydrogen

Explanation:

A normal hydrogen (H) atom does not have any neutrons in its tiny nucleus

Answer:

1 cal = 0.004187 kJ

1,500,000 cal = 6280.5 kJ

The balanced reaction equation is; NH4Cl (aq) → NH3 (aq) + HCl (aq)

The temperature was increasing by 1 degree.

Balancing a chemical reaction equation involves making sure that the same number of each type of atom appears on both the reactant and product side of the equation. This is necessary because the law of conservation of mass states that the total amount of matter in a system must remain constant.

To balance a chemical reaction equation, follow these steps:

Write the unbalanced equation

Count the number of atoms of each element on both sides of the equation.

Add coefficients (numbers in front of molecules) to the reactants or products to make the number of atoms of each element the same on both sides of the equation.

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The LD50 (Lethal Dose 50) is a measure used in toxicology to determine the lethal dose of a substance that would cause death in 50% of the test population.

However, it is important to note that conducting experiments to determine the LD50 of a substance on humans is unethical and illegal. The LD50 values are typically determined through animal testing, usually on rodents such as rats or mice.To calculate the amount of a substance that would harm a person of a certain weight, various factors need to be considered, including the toxicity of the substance and the individual's weight. In toxicology, a commonly used measure is the oral median lethal dose (LD50) expressed as milligrams per kilogram of body weight (mg/kg).To estimate the harmful dose for an individual of a certain weight, you would need to know the LD50 value of the substance and apply it to the weight of the person. The calculation involves multiplying the LD50 value by the person's weight in kilograms. However, it is crucial to emphasize that estimating harmful doses for humans based on animal LD50 values alone can be inaccurate and potentially dangerous.

It is essential to consult professionals in toxicology or poison control centers to obtain accurate information regarding the toxicity of a substance and its potential effects on human health.

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Yes, it is the right response. Although the elements are imaginary, they resemble actual elements .Nomenclature is an organism name system used in biological classification.

The Latin words nomen (name) and calare (to call) are the source of the word nomenclature. Both the Latin word nomenclatura and the English word nomenclator, which also denotes a source or broadcaster of names, relate to a list of names.

Nomenclature is an organism name system used in biological classification. Genus & species names, two Latinized nouns drawn from numerous sources, serve as indicators of the species whereby the creature belongs.

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Answer:

diamond

Explanation:

Answer:

190n

Explanation:

190 190 and because it is easy to understand if you didn't understand my answer ask any man

Answer:

your answer is C

Explanation:

The electron-dot structure of NH3 places one set of nonbonding electrons in the valence shell of the nitrogen atom. that means there are three bonded atoms and one single pair for a coordination number of four surrounding  the nitrogen, the same occurs in water to. along with the Lewis dot structure for ammonia, NH3. the non bonding atoms are basically like hydrogen atoms the try to refuse to bond and they can't be fused unless the right conditions are met.

A particular medication dosage is 45.0 mg/kg of body weight. The mg of the medication should a child weighing 47.3 lbs. receive is 965.25 mg of the medication.

To find the correct dosage of medication for a child weighing 47.3 lbs, we need to convert the child's weight from pounds to kilograms and then multiply by the dosage amount.

Step 1: Convert the child's weight from pounds to kilograms.
1 kg = 2.20462 lbs
47.3 lbs ÷ 2.20462 = 21.45 kg
Step 2: Multiply the child's weight in kilograms by the dosage amount.
21.45 kg × 45.0 mg/kg = 965.25 mg
Therefore, the child should receive 965.25 mg of the medication.

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Basalts are formed in many areas of the earth such as the colorado, red sea, oceanic crust and others.

Basalts are are formed from the cooling of lava from the Earth's surface. The lava from which these basalts are made from is from magma.

This formed basalt is a form of igneous rock. The outside layer of the earth crust which is the oceanic crust is where the basalts are formed.

However, the importance of basalts cannot be overemphasized as is used in many building materials. It is also used for thermal purposes.

In conclusion, it can be deduced that the basalts are also created or produced in the oceanic crust of the earth.

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Answer:

Fe is iron

Explanation:

:)

Answer:

Iron

Explanation:

In chemistry and in the periodic table, Fe stand for Iron.

hope this helps :)

Answer:

2Mg(s) + O2 (g) -> 2MgO(g)

1.5 atm pressure will be required for neon at 30°C to have the same density as nitrogen at 20°C and 1.0 atm.

The relationship between a gas's pressure P, volume V, and temperature T in the range of low pressures and high temperatures, when the gas's molecules move virtually independently of one another, is known as the ideal gas law, also known as the perfect gas law.

T\(_N_e\)​ =30⁰C=(30+273)K=303K

T\(_N_2\)​​ =20⁰C=(20+273)K=293K

P\(_N_2\) ​ =1.0atm

Ideal gas constant - R=0.0821L⋅atm/ K⋅ mol

The molar mass of

Neon - M\(_N_e\)​​=20.18g/mol

Nitrogen - M\(_N_2\)​​ ​ =2⋅14.007g/mol=28.014g/mol

Determine the pressure P\(_N_e\)​  required for neon at 30⁰C to have the same density (d) as nitrogen at 20⁰C.

d = m/V

We know that

n = m/M

Using the ideal gas law, we get

PV = nRT

PV = m/M *RT

Since

PM/RT = m/V =d

d =  PM/RT

d= \(\frac{P_{N_2} M_{N_2}}{R T_{N_2}}\)

d = 1.0 atm * 28.014 g/mol/0.0821L atm/K mol 293K

d = 1.2 g//L

Since both gases have the same density, we can calculate the pressure of neon gas, using

\(d=\frac{P_{N e} M_{N e}}{R T_{N e}}\)

\(P_{N e}=\frac{d R T_{N e}}{M_{N e}}\)

\(P_{N e}\)=1.2g/L . 0.0821L . atm/K.mol.303 K/20.18 g/mol

\(P_{N e}\)=1.5 atm

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The expression relating the concentration of a gas in \(\mu g/m^-^3 (X)\) with the concentration expressed in ppm (Y) is \(Y = (X/MW) * 10^6 / V\)

To derive an expression relating the concentration of a gas in \(\mu g/m^3 (X)\) with the concentration expressed in ppm (Y), we can use the ideal gas law. The ideal gas law states that \(PV = nRT\), where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature. Rearranging the equation, we have \(n = PV/RT\)

To convert the concentration from \(\mu g/m^-^3 (X)\) to moles (n), we divide X by the molecular weight (MW) of the gas. Thus, \(n = X/MW\)

Combining the two equations, we have \(X/MW = PV/RT\)

Since the concentration expressed in ppm (Y) is the same as the number of moles per million parts of air, we can write \(Y = n * 10^6 / V\)

Substituting \(n = X/MW\), we get \(Y = (X/MW) * 10^6 / V\)

Therefore, the expression relating the concentration of a gas in \(\mu g/m^3 (X)\) with the concentration expressed in ppm (Y) is:

\(Y = (X/MW) * 10^6 / V\)

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Complete question is:

Using the ideal Gas Law, derive an expression relating the concentration of a gas \(\mu_g^-^3 (X)\) with the concentration expressed in ppm (Y). (10 pts) Hint:- Ideal gas law \(PV= nRt -R = 0.0821 atm mol^-^1\)  −MW=X= molecular weight

Answer:

42. The statement is "The value of ΔH° for the overall reaction is large and negative".

43. The value of the enthalpy change is -93kJ.

Explanation:

42. The Kp depends on the ΔH° as both are related by ΔG formula, so the statement that identifies the reason of Kp value is "The value of ΔH° for the overall reaction is large and negative".

If ΔH° is negative, then the calculation of Kp will be a large number, because the formula of Kp is:

43. To calculate the value of the enthalpy change per mole of HCl produced, it is necessary to write the whole final reaction from the reactions in steps 1, 2 and 3 (multiplying or dividing the enrgies, just like the equations). Then, we have to sum all the final energies:

In this case, it is not necessary to multiply or divide the equations, because each H cancels, and each Cl cancels as well.

-186 kJ is the enthalpy change for the whole reaction, where 2 moles of HCl are produced. So, to calculate the enthalpy change for 1 mole of HCl, we have to divide it by 2.

Finally, the value of the enthalpy change is -93kJ.

If two samples of sodium chloride are analyzed and each is found to contain a different percentage of chlorine, the most likely explanation for the difference is that c. at least one of the samples must not be pure.

Sodium chloride is a compound composed of sodium and chlorine ions in a 1:1 ratio, meaning that the percentage of chlorine in any sample of NaCl should be constant. Therefore, any variation in the percentage of chlorine in different samples of NaCl suggests that impurities or other compounds are present.
The ratio of the two different stable chlorine isotopes (35 & 37) can cause a small difference in the mass of the sample but it is not significant enough to result in a noticeable difference in the percentage of chlorine. The difference in the source region of the two samples can also have a minor effect, but it is unlikely to cause a significant difference in the percentage of chlorine.
Therefore, the most plausible explanation is that impurities or other compounds are present in at least one of the samples. This could be due to contamination during the manufacturing process or from other sources, such as the environment. To accurately determine the purity of NaCl samples, further analysis may be required to identify and quantify any impurities present.

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Answer:

22.4 L

Explanation:

Kinetic data refers to information about the rate of a chemical reaction, and it is often presented in the form of graphs. These graphs help us understand how the concentration of reactants and products change over time.

To interpret a graph correctly, it's important to properly label the axes. The x-axis usually represents time, while the y-axis represents the concentration of the reactant or product. In this case, "[B]" would be used to represent the concentration of reactant B.

When interpreting the graph, we can analyze the slope of the curve. A steeper slope indicates a faster reaction rate, while a shallower slope suggests a slower reaction rate. Additionally, the shape of the curve can provide insights into the reaction mechanism.

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The order of DECREASING electronegativity is Se > As > Sn. The order of DECREASING electronegativity is Ru > Hf > Xe. The order of DECREASING electronegativity is N >  Sb > He.

A functional group or an atom's propensity to draw electrons to itself is referred to as its "electronegativity," which is a chemical attribute. Both the atomic number and the separation between the valence electrons and the charged nuclei have an impact on an atom's electronegativity.

What causes an increase in electronegativity?

As you traverse a period in the periodic table from left to right, the electronegativity of atoms rises. The reason for this is that when you move from left to right across a period, the nuclear charge rises faster than the electron shielding, increasing the atoms' attraction to the valence electrons.

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Answer:

In liquids, particles are quite close together and move with random motion throughout the container. Particles move rapidly in all directions but collide with each other more frequently than in gases due to shorter distances between particles. With an increase in temperature, the particles move faster as they gain kinetic energy, resulting in increased collision rates and an increased rate of diffusion.

Explanation:

In liquids, particles are quite close together and move with random motion throughout the container. Particles move rapidly in all directions but collide with each other more frequently than in gases due to shorter distances between particles. With an increase in temperature, the particles move faster as they gain kinetic energy, resulting in increased collision rates and an increased rate of diffusion.

Answer:

What happens to acid when heated? When heated, the pure 100% acid loses sulfur trioxide gas, SO3, until a constant-boiling solution, or azeotrope, containing about 98.5% H2SO4 is formed at 337°C. Hot concentrated sulfuric acid reacts with most metals and with several nonmetals, e.g., sulfur and carbon.

Explanation: