a saline solution is 6.60% by mass. if you have a large container of this solution, and the container contains 2.00kg of sodium chloride, what tis the mass of the solution in your container?

Answer:

Explanation:

1 = A

Sublimation is the process where by a sample is heated to pass through solid phase to gaseous phase without the intermittent liquid phase. Example of substance that sublime is camphor.

2 = D

Decantantion

5 = F

Filtration is the process a liquid from solid using a porous material. This technique requires a set up and a good porous material eg filter paper.

6 = B

This technique is to separate a mixture of solids by converting them from solid phase to gaseous phase since they sublime.

3 = deposition.

The answer isn't in the option but deposition is the process of substance in gaseous phase to change into solid state without passing through liquid phase. Deposition is the opposite of sublimation.

4 = E

Explanation:

Here is why: If the atmosphere contains too much of these gases, the whole Earth becomes a hotter and hotter greenhouse. The atmosphere holds onto too much of the heat at night instead of letting it escape into space. Then, the next day, the Sun heats Earth's surface even more.

The pressure of (Pch3nc) at 0 seconds cannot be determined as there is no corresponding value of ln(Pch3nc) given for 0 seconds in the provided raw data.

The data starts at a time of 2000 Torr, and the corresponding value of ln(Pch3nc) at that time is 6.40. The given data represents a plot of the natural logarithm of the pressure of (Pch3nc) as a function of time. The pressure values are given in Torr units, and the logarithm of these values is plotted on the y-axis.

From the provided data, we can observe that the pressure of (Pch3nc) decreases with time, as indicated by the decreasing values of ln(Pch3nc). However, the pressure at 0 seconds cannot be determined as it is not provided in the given data.

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The energy of a single photon with a wavelength of 405 nm is [energy, 405 nm photon]. A mole of 405 nm photons has an energy of [energy, kj/mol].

The energy of a photon can be calculated using the equation E = hc/λ, where E is the energy, h is Planck's constant (6.62607015 × 10^-34 J·s), c is the speed of light (2.998 × 10^8 m/s), and λ is the wavelength of the photon.

Substituting the values into the equation, we can calculate the energy of a single 405 nm photon:

E = (6.62607015 × 10^-34 J·s)(2.998 × 10^8 m/s) / (405 × 10^-9 m)

E ≈ 4.89 × 10^-19 J

To determine the energy of a mole of 405 nm photons, we can use Avogadro's number (6.022 × 10^23 mol^-1) to convert the energy from joules to kilojoules:

E_mol = (4.89 × 10^-19 J)(6.022 × 10^23 mol^-1) / 1000

E_mol ≈ 2.95 × 10^5 kJ/mol

Therefore, a mole of 405 nm photons has an energy of approximately 2.95 × 10^5 kilojoules per mole.

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Answer: Semi-structured data is a type of data that has some consistent and definite characteristics. It does not confine into a rigid structure such as that needed for relational databases that which is why  it will not fit into row and columns in a table .

Explanation:

Answer:

quartz (SiO2)n

Explanation:

Melting point is defined as the temperature or point at which the substances change its state from solid to liquid.

Quartz (SiO2)n has high melting point than O2 because Quartz (SiO2)n is found in the form of hard, crystalline mineral that is made up of silicon and oxygen atoms having strong covalent bonds between all the atoms. So, a lot of energy is required to break the bond between the atoms and it has a high melting point.

Hence, the correct answer is quartz (SiO2)n.

Answer:

Pressure should be used to seperate the mixture.

Explanation:

The technique that can be used to separate a homogeneous mixture into its component parts is by applying pressure. The correct option is A.

A homogeneous mixture is a mixture of compounds that has been thoroughly blended to the point where individual substances cannot be seen.

Each sample of the mixture will contain the same proportions of each substance. Homogeneous mixtures can consist of solids, liquids, gases, or plasmas.

A heterogeneous mixture is made up of distinct substances or phases.

Applying pressure is one method for separating a homogeneous mixture into its constituent parts.

The most common method for separating homogeneous fluid mixtures is distillation. Separation takes advantage of differences in boiling points or volatility between the components of a mixture.

Thus, the correct option is A.

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The first step of the reaction, we have  reaction between a nucleophile and an electrophile.

We can see that in the first step of the reaction, we have  reaction between a nucleophile and an electrophile. In this case, the electrophile would have to be an alkyl halide which produces a carbocation as show in the image attached. What we have here is quite similar or  like most of the organic reactions, this reaction occurs in a number of detailed or smaller steps and each step of the reaction is going to help to bring us closer to the end product of the entire steps of the reaction which is wat we target as we carry out the particular reaction.The second step involves the reduction of the alkyne with the use of a Lindlar catalyst. As such the reaction is poisoned and it stops at the alkyne stage rather than going on to obtain the alkane.

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Answer:

41.09% B N. The formula in EDTA

Explanation:

Diazomethane (CH2N2) is an important reagent for the methylation of some organic molecules. Here are the complete parts 1 and 2 about this unique reagent:

Part 1: Introduction

Diazomethane is an organic compound with the molecular formula CH2N2. It is a colorless gas that is usually handled as a solution in diethyl ether. It is an important reagent for the methylation of some organic molecules.

Part 2: Properties of Diazomethane

Diazomethane is a relatively unstable compound that has a short shelf life. It is typically generated in situ using precursors such as potassium or sodium nitrite. It is a highly reactive compound that can be used for a variety of organic transformations, including the methylation of ketones, aldehydes, and carboxylic acids.Diazomethane is a highly toxic compound that is a known carcinogen. It is important to handle it with care and to take appropriate precautions when working with this compound.

Diazomethane should only be used in a well-ventilated laboratory with appropriate safety equipment and training. Overall, diazomethane is an important reagent for the methylation of some organic molecules, but it should be handled with care due to its toxicity and instability.

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The correct answer is F. B and C but not A. In a titration between a weak base and a strong acid, the reaction involves the protonation of the weak base by the strong acid.

Option B represents the reaction for a weak base, denoted as B, reacting with a strong acid, denoted as H+, to form a conjugate acid BH+. This is a typical representation of the reaction between a weak base and a strong acid. Option C, on the other hand, represents the dissociation of the conjugate base of the weak acid, denoted as A-, in the presence of the strong acid, resulting in the formation of hydronium ions (H3O+). This dissociation represents the reaction between the weak base's conjugate acid and the strong acid.

Option A does not accurately represent the reaction for a weak base titrated with a strong acid, as it shows the formation of hydroxide ions (OH-) instead of the expected formation of a conjugate acid. Therefore, the correct answer is F. B and C but not A.

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At −92°C, the vapour pressure of the substance X is 5.5 atm

According to Clausius Clapeyron equation,

ln (P₂/P₁) = -ΔHvap /R (1/T₂ - 1/T₁) -------> (i)

Here,

P₁ = 1 atm

T₁ = 90°C = (90 +273)K = 363K

T₂= -92°C = (-92+ 273)K = 181 K

ΔHvap = 17 KJ/mol

R = 8.314 J/K/mol

To find: P₂

Substituting the above given values in equation (i) we get,

ln (P₂/P₁) = -ΔHvap /R (1/T₂ - 1/T₁)

ln(P₂/ 1 atm)= -17 KJmol⁻¹ /  8.314 JK⁻¹mol⁻¹ ( 1/181K -1/363K)

ln P₂ = -17 KJmol⁻¹ /  0.008314 KJK⁻¹mol⁻¹ ( 0.0028K)

2.303 log (P₂) = - 730240.55 atm

log (P₂) = - 730240.55 atm/ 2.303

log (P₂) = -317082.306 atm

P₂ = antilog (-317082.306)

P₂  = 5.5 atm (upto two significant figures)

Thus, the vapour pressure of X at −92°C is 5.5 atm.

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Answer:

260

Explanation:

Last week, Belinda practiced the violin for 45 minutes each day for 6 days.

Now,Multiply 45 minutes of 6 days

45×6=260

Therefore, The amount of time in hours, that Belinda practiced the violin last week.

The hydroxide ion concentration of 2.1 x 10^-4 M results in a basic solution with a pH of 10.32.

To calculate the pH of the solution, we first need to use the formula pH = -log[H+]. Since we are given the hydroxide ion concentration, we need to use the equation Kw = [H+][OH-], where Kw is the ion product constant for water (1.0 x 10^-14 at 25°C). Solving for [H+], we get [H+] = Kw/[OH-] = 4.76 x 10^-11 M.

Plugging this value into the pH formula, we get pH = -log(4.76 x 10^-11) = 10.32. Since the pH is greater than 7, the solution is basic.

It's important to note that hydroxide ions (OH-) are a strong base, meaning they readily accept protons (H+) to form water. In this case, the hydroxide ion concentration is relatively low, indicating a weak base. However, because there are so few H+ ions compared to OH- ions, the solution is still basic.

Overall, the hydroxide ion concentration of 2.1 x 10^-4 M results in a basic solution with a pH of 10.32.

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4.98 × 10²³ formula units Ba(NO₃)₂

Math

Pre-Algebra

Order of Operations: BPEMDAS

Chemistry

Atomic Structure

Stoichiometry

Step 1: Define

[Given] 216 g Ba(NO₃)₂

[Solve] formula units Ba(NO₃)₂

Step 2: Identify Conversions

Avogadro's Number

[PT] Molar Mass of Ba - 137.33 g/mol

[PT] Molar Mass of N - 14.01 g/mol

[PT] Molar Mass of O - 16.00 g/mol

Molar Mass of Ba(NO₃)₂ - 137.33 + 2[14.01 + 3(16.00)] = 261.35 g/mol

Step 3: Convert

Step 4: Check

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

4.97705 × 10²³ formula units Ba(NO₃)₂ ≈ 4.98 × 10²³ formula units Ba(NO₃)₂

Answer:

Explanation:

Given 216g Ba(NO₃)₂ = 216g/261.34g/mol = 0.827mol

0.827mol = 0.827mol x 6.023 x 10²³molecules/mol

= 4.978066886 x 10²³ molecules (calc. ans.)

≅ 4.98 x 10²³ molecules (3 sig. figs. based on given 216g Ba(NO₂)₃)

To make an E9 mixture 8657.14 gal of E7 should be mixed with 3000 gal of E10

Given to us is the amount of ethanol in the E10 mixture is 10% of 3000 gallons:

Ethanol in E10 = 10% × 3000 gal = 0.10 × 3000 gal = 300 gal

To solve this problem, we can set up an equation based on the amount of ethanol in each mixture.

Let x represent the amount of E7 mixture (in gallons) that needs to be added to the E10 mixture to obtain the desired E9 mixture.

The amount of ethanol in the E7 mixture is 7% of x gallons:

Ethanol in E7 = 7% ×  gal = 0.07 × gal

The resulting E9 mixture will contain 9% ethanol of the total volume of 3000 + x gallons:

Ethanol in E9 = 9% × (3000 + x) gal = 0.09 × (3000 + x) gal

According to the problem, the resulting E9 mixture contains 906 gallons of ethanol:

Ethanol in E9 = 906 gal

Now we can set up the equation:

Ethanol in E10 + Ethanol in E7 = Ethanol in E9

300 gal + 0.07x gal = 906 gal

Subtracting 300 gal from both sides:

0.07x gal = 606 gal

Dividing both sides by 0.07:

x = 606 gal / 0.07

x = 8657.14

Therefore, approximately 8657.14 gallons of E7 mixture should be mixed with 3000 gallons of E10 to make an E9 mixture.

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Complete question: Ethanol fuel mixtures have "E" numbers that indicate the percentage of ethanol in the mixture by volume. For example, E10 is a mixture of 10% ethanol and 90% gasoline. How much E7 should be mixed with 3000 gal of E10 to make an E9 mixture?

After collision 4 kg block is moving with 2 m/s velocity in opposite direction of velocity before collision.

When two bodies come into direct touch with each other, this is referred to as a collision. The two bodies exert pressures on each other in this situation in a brief period of time. As a result of the collision, the energy and momentum of the bodies involved change. Furthermore, the collision may occur as a result of real physical contact between the bodies involved.

Physical contact between the two bodies engaged in the accident may not occur. For example, consider the bombardment of the atomic nucleus by alpha particles. A collision is a short-term reciprocal contact between two masses in which the momentum and energy of the colliding masses change.

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The empitical formula shows the simplest ratio of elements in a compound (not the total number of atoms in the molecule).

So to find the empirical formula we need to calculate how many moles of each atom we have in this sample. Then we will see the ratio of each element.

We are given the mass, so to convert it to moles we use the molar mass. For this we go to the periodic table and see that the values for each element are:

Na (sodium): 22,99 g/mol

H (hydrogen): 1 g/mol

P (phosphorus): 25,81 g/mol

So we calculate the moles of each element as follows:

And as we see, for every 0.833 moles of Na we have the same number of moles of P, so the ratio of these elements in the molecule is 1 to 1.

As for the hydrogen:

So the ratio Na to H is 1 to 2.

Now we can write the empirical formula as follows=

when energy is transferred into or out of a substance, it can either increase or decrease the average kinetic energy of its molecules, which will in turn increase or decrease the substance's freedom of movement.

Molecules in any substance are constantly in motion, vibrating and rotating about their respective centers of mass. This movement is due to the internal energy of the molecule, which is the sum of its kinetic and potential energies. When energy is transferred into or out of a substance, this affects the internal energy of the molecules in the substance, which can change their freedom of movement.The relationship between energy and freedom of movement can be explained in terms of the kinetic theory of matter. This theory suggests that the temperature of a substance is directly proportional to the average kinetic energy of its molecules. As the temperature of a substance increases, so does the average kinetic energy of its molecules. This increased kinetic energy results in an increase in the speed of molecular motion and, therefore, an increase in freedom of movement. Conversely, as the temperature of a substance decreases, the average kinetic energy of its molecules decreases as well, which results in a decrease in the speed of molecular motion and, therefore, a decrease in freedom of movement. Therefore, when energy is transferred into or out of a substance, it can either increase or decrease the average kinetic energy of its molecules, which will in turn increase or decrease the substance's freedom of movement.

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Answer:

No, I believe it's not balanced, srry if I got it wrong for you

Answer:

a) 1s22s22p63s1

b) 3s² 3p¹

c) 1s22s22p63s23p3

d) 3s² 3p⁵

e) 3s2

f) 1s22s22p63s23p2

g) 1s22s22p63s23p4

h) 3s² 3p⁶

Answer:

37

Explanation:

( 98.6 - 32 ) × 5(100c) ÷ 9(180f) = 37

Simply put, 2 moles of CO2 are needed to produce 2 moles of H2CO3 after we convert the molecules of H2CO3 to moles of CO2.

A mole is a crucial unit of measurement used by chemists. Similar to how having a dozen eggs says you have twelve eggs, having a mole of something indicates that you do have 602,214,076,000,000,000,000,000 of that particular thing. For extremely tiny objects like atom, molecules, or other particles, chemists must quantify using moles.

A mole is equal to the mass of the object that includes 6.023 x 1023 of that object's particles. The SI unit of measuring a substance's quantity is the mole. Mol is its symbol. According to definition, one mole of carbon-12 weighs 12 grams or comprises 6.022140857 x 1023 atoms of carbon (to 10 significant figures). Examples.

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Answer:

Choice B, as time goes on the surface level rises and stuff buried underground gets further and further below surface level.

The system at 25°C, the equilibrium will shift to the right. NH4Cl(s) will break down into NH4(aq) and Cl-(aq) forming more products as the temperature increases.

The reaction NH4Cl(s) heat ↔ NH4(aq) + Cl-(aq) is an endothermic reaction where heat is absorbed as the reactant NH4Cl(s) breaks down into NH4(aq) and Cl-(aq) at a specific temperature of 25°C.

The equilibrium will shift to the right if an increase in temperature is added to the system.

The increase in temperature will favour the endothermic reaction that requires more heat for the reaction to occur as the system shifts in the direction that will absorb more heat to replace that lost to the surroundings.

So, when an increase in temperature is added to the system at 25°C, the equilibrium will shift to the right.

Hence, NH4Cl(s) will break down into NH4(aq) and Cl-(aq) forming more products as the temperature increases.

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In a vacuum, the objects fall at the same rate independent of their respective masses. That means coin and feather both reach the ground at the same time in a vacuum. Larger objects experience more air resistance than smaller objects. Also, the faster an object falls, the more air resistance it encounters.

Note:

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