A flask containing 5.98mL of a liquid weighs 163.4 g with the liquid in the flask and 154.9 when empty. Calculate the density of the liquid in g/mL to the correct number of significant digits

Answer:

d.electrons

Explanation:

Answer:

To express y in terms of x is to find an expression that relates the value of x with y. This is to write a model, function, expression or formula that permits to input a value for x and the outcome will be the value of y. .For example if you have y = 2x, y is in terms of x and you can input different values of x to obtain corresponding values (outputs) of y.

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Explanation:

Final answer:

To express y in terms of x, you manipulate an equation to make y the subject, using substitution and algebraic manipulation for simple equations, or differentiation and implicit differentiation for more complex relationships.

Explanation:

To express y in terms of x, one typically manipulates a given equation or set of equations, solving for y to make it the subject. The process may involve various mathematical techniques, including substitution, algebraic manipulation, and differentiation when dealing with functions of multiple variables. An example of expressing y in terms of x can be seen in a simple linear equation, such as y = mx + b, where m is the slope and b is the y-intercept. In this case, y is already expressed in terms of x.

In more complex relationships, such as the nonlinear equation x + y = exp(xy), one might take a derivative with respect to x to get dy/dx and solve that differential equation for y in terms of x, considering implicit differentiation if necessary.

This is an example of "Skyscrapers".

Explanation:

Answer:

its sum about the engernier proces

Explanation:

just did i on apex

Answer:

Among the different types of scientific knowledge  hypotheses are likely to be modified or discarded most frequently. Long ago in the 1600's scientists discarded the phlogiston theory because the new evidence didnt support it.

Explanation:

Hypothesis is the assumption of something possible or impossible to draw a consequence and is provisionally established as the basis for an investigation and which can confirm or deny its validity. For this reason, within scientific research, hypotheses are so important and so changeable that they are modified or discarded more frequently within scientific knowledge.

Based on a work by Johann Joachim Becher, the German scientist Georg Ernst Stahl created the phlogiston theory that said combustion occurred with certain materials because they had an “element” or a common flammable principle that was released at the time of burning . This theory was abandoned because there was no evidence, even through scientific experiments, to prove that this theory is true.

Hypotheses are likely to be modified or discarded most frequently in scientific knowledge. Phlogiston theory was discarded due to evidence contradicting its predictions.

Among the different types of scientific knowledge, hypotheses are likely to be modified or discarded most frequently. Long ago, in the 1600s, scientists discarded the phlogiston theory because evidence contradicted the predictions made by the theory. Phlogiston theory proposed that a substance called phlogiston was released during combustion, but experiments showed that substances gained weight instead of losing weight during combustion.

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Answer:

The answer is D. H+ increases in solution.

Explanation:

One water molecule gains a hydrogen and therefore takes on a positive charge, while the other water molecule loses a hydrogen atom and therefore becomes negatively charged.

More information:

(https://www2.nau.edu/lrm22/lessons/acids_and_bases/acids_and_bases.html#:~:text=One%20water%20molecule%20gains%20a,and%20it%20makes%20things%20acidic.)

Answer:

Molality of the solution :  0.630 M

Mass of the KBr (solute) = x grams

Mass of the solvents : 86.0 - x grams

Mass of the solute = 6.001 grams

Mass of the solvent = 86.0 - x grams = 86.0 - 6.001 g = 79.999 grams

Explanation:

A 0.510m aqueous solution of KBr has a total mass of 67.0g. The masses of solute and solvent are 3.833g and 63.167 g.

The two main elements of a solution are a solute and a solvent. The solute is a substance that dissolves. The former dissolves in the solvent, which has that property. In other terms, the solvent is the dissolving media, and the solute is the stuff that is dissolved.

The solute, which is present in a solution in a smaller quantity than the solvent, is the substance that dissolves in the solvent. The term "solvent" refers to the substance that dissolves the solute in a solution; it is more abundant than the solvent.

Greater than the solvent is the boiling point. That is less than the solute's level.

Solute as a solid, liquid, or gas. Solvent is primarily liquid, but it can also be gaseous.

The qualities of the solute determine its solubility. The solvent's characteristics affect how something dissolves.

let the mass of solute be x g

mass of solvent= (67- x) g

Molality = [tex]\frac{x X 1000}{119(67-x)}[/tex]

solving for x:

x = 3.833g

67 - x = 63.167 g

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Answer:

Explanation:

Bronsted Base is an H+ acceptor

No good answer Bronstead base does not accept hydroxide or electrons

Answer:

Bronsted-Lowry bases include both proton acceptors and hydroxide ions.

Explanation:

Bronsted Lowry base theory includes all bases that can act as proton acceptors. This includes Arrhenius bases include bases that can produce hydroxide ions in solution, such as sodium hydroxide, and more traditional proton acceptors like ammonia, NH3..

Yo sup??

The correct answer is option D ie

n + A----> B + C + n

Its similar to bombarding a U 235 ore.

Hope this helps.

Answer:

Answer is D, I've done the exam I know for sure.

Explanation:

n + A → B + C + n

Hope you all get a good grade :))

Answer:

the answer is 58000000000 nanometers

Different conversion units are used to evaluate different parameters. Therefore, 5.8 ×10¹⁰nm  in 0.058 km.

Unit conversion is a multi-step procedure that includes multiplying or dividing a number by a numerical factor. Weight, distance, as well as temperature may all be measured in many ways. Distance is expressed in kilometers, mass in kilos, and temperature in degrees Celsius in many nations.

Unit converting is a multi-step procedure that requires multiplying or dividing by a numerical number or, more specifically, a conversion factor. The technique may also require selecting the appropriate number of important digits and rounding. Different conversion units are used to evaluate different parameters.

1km= 10¹²nm

0.058 km = 0.058 ×10¹²= 5.8 ×10¹⁰nm

Therefore,  5.8 ×10¹⁰nm in 0.058 km.

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Answer: D

Explanation:

it says so on google

Answer:

                     Pressure  =  2.45 atm

Explanation:

                    The balance chemical equation for the decomposition of hydrogen peroxide is as follow;

                                 2 H₂O₂ ₍aq₎ → 2 H₂O ₍l₎ + O₂ ₍g₎

Step 1: Calculate Moles of H₂O₂ as;

                     Moles  =  Mass / M.Mass

                     Moles  =  68.0 g / 34.01 g/mol

                     Moles  =  1.99 moles

Step 2: Calculate Moles of O₂ gas produced:

According to equation,

2 moles of H₂O₂ produced  =  1 mole of O₂

So,

1.99 moles of H₂O₂ will produce  =  X moles of O₂

Solving for X,

                     X  =  1.99 mol × 1 mol / 2 mol

                      X =  0.995 moles of O₂

Step 3: Calculate pressure exerted by O₂ gas as;

According to ideal gas equaton,

                                     P V  =  n R T

Or,

                                     P  =  n R T / V

Putting values,

                   P  =  0.995 mol × 0.08205 L.atm.K⁻¹.mol⁻¹ × 300 K / 10 L

                   P  =  2.45 atm

Answer:

B location A will experience water scarcity because plastic absorbs

Explanation:

Answer: I believe its D

Explanation:

Im doing the science test rn

Answer: Option D. There is no net change to the system.

Explanation:

Answer:

B

Explanation:

Answer: 1.21x10²³ formula units Ca( ClO3)2

Explanation: solution attached:

Convert mass of Ca(ClO3)2 to moles

Convert moles of Ca(ClO3)2 to formula units using Avogadro's number

Answer:

                    Charge on Phosphate is -3 (PO₄³⁻)

Explanation:

                     Ions or polyatomic ions are formed when an atom or molecule loses or gains electron(s) respectively.

Example:

              Formation of ions.

                           Na  →  Na⁺  +  e⁻ (Na loses one electron)

                           Cl₂  +  2 e⁻  →  2 Cl⁻ (Cl gains electron)

In polyatomic ions a charge is present on a molecule which has either two or more atoms.

Example:

               CO₃²⁻ , SO₄⁻ , NH₄⁺ e.t.c.

In statement the  K₃PO₄ polyatomic ionic compound. It is made up of three K⁺ ions and one Phosphate ion (PO₄ˣ⁻) ion.

As we know K belongs to group 1 metals so it has one valence electron and thus, forms a cation of +1 charge. So, for a neutral polyatomic ionic compound the overall charge on K₃PO₄ should be zero. Hence,

                                         K (3) + PO₄ (X)  =  0

Or,

                                         +3 + X = 0

Or,

                                         X  =  0 - 3

                                         X  =  -3

Therefore, the charge on phosphate is -3.

The charge of phosphate in K3PO4 is -3.

The charge of phosphate in K3PO4 can be determined using the table provided. From the table, we can see that K+ has a charge of +1. Since there are three K+ ions in K3PO4, their total charge is +3. So, the charge of phosphate in K3PO4 is -3.

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The mass of a nitrogen dioxide (NO2) molecule is approximately 46 atomic mass units (amu) as per the concept of molar mass.

Molar mass of a compound or a molecule is defined as the mass of the elements which are present in it.The molar mass is considered to be a bulk quantity not a molecular quantity. It is often an average of the of the masses at many instances.

The molecular mass and formula mass are used as synonym for the molar mass.It does not depend on the amount of substance which is present in the sample.It has units of gram/mole.

Molar masses of an element are given as relative atomic masses while that of compounds is the sum of relative atomic masses which are present in the compound.This is because the atomic masses  of nitrogen is 14 amu and  that of nitrogen is 16 amu, respectively. Since there are two oxygen atoms and one nitrogen atom in an NO₂ molecule, the total mass is calculated as follows:

[tex]2\times16+1\times14=46 \ amu[/tex]

Therefore, the mass of a nitrogen dioxide molecule is approximately 46 amu.

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Answer:  pH = 7.36. The pKa of H2PO4− is 7.21.

Explanation:

Answer:

Its c.

Explanation:

When the density and temperature at the core of the gravitationally collapsing nebula reaches values when nuclear fusion is triggered and sustained, that marks the birth of the star.

‘ you don’t likeee me dasss fineee kk byeee’

Answer:

ot

Explanation:

Answer:

true

Explanation:

The correct option is D.

The heat of vaporization is defined as the amount of heat needed to turn 1g of a liquid into a vapor, without a rise in the temperature of the liquid.

That is, water has a high heat of vaporization, the amount of energy needed to change one gram of a liquid substance to gas at a constant temperature. Water's heat of vaporization is around 540 cal/g at 100 °C, water's boiling point.

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Answer:

0.33M

Explanation:

Molarity is asking, in Laymens terms:

"If I took a litre of this stuff, how much stuff is gonna be in it?"

Diving deeper, we use litres instead of millilitres or nanolitres because that's usually what we're working with. We use moles rather than mass because mass varies; different substances have different molar masses, so describing something in g/L makes no sense if you're comparing two different solutions.

Anyway, go find the number of moles:

n=m/mm

n=27g/342.34g/mol

n=0.078870mol

The next question you've gotta ask yourself is:

What if I had a litre of it?

V = 0.2366L

M=n/V

M=0.078870mol/0.2366L

M=0.33M

The molarity of the Dr. Pepper made with imperial cane sugar is 0.334 M. This is calculated by first converting the mass of sugar into moles and the volume of water from mL to L, and then using these values in the molarity equation.

To calculate the molarity of a solution, we can use the formula: Molarity (M) = moles of solute/liters of solution. To apply this to your question, we first need to convert the mass of cane sugar (C12H22O11) into moles. The molecular weight of cane sugar (C12H22O11) is approximately 342.3 g/mol. Therefore, 27 g of sugar is approximately equal to 0.0789 moles.

Next, we need to convert the volume of water from mL to L. Hence, 236.6 mL is equal to 0.2366 L. Now, we can use these values in our molarity equation: M = 0.0789 moles/ 0.2366 L = 0.334 M. Therefore, the molarity of the Dr. Pepper made with imperial cane sugar is around 0.334 M.

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C. Tripling the length and reducing the radius by a factor of 2 is the change to a pipe would increase the conductance by a factor of 12.

Explanation:

As we know that the resistance is directly proportional to the length of the pipe and it is inversely proportional to the cross sectional area of the pipe.

So it is represented as,

R∝ l /A [ area is radius square]

So k is the proportionality constant used.

R = kl/A

Conductance is the inverse of resistance, so it is given as,

C= 1/R.

R₁ = kl₁ / A₁

R₂ = kl₂/A₂

R₂/R₁ = 1/12 [∵ conductance is the inverse of resistance]

        = l₂A₁ / l₁A₂

If we chose l₁/l₂= 3 and A₂/A₁= 4 So R₂/R₁= 1/3×4 = 1/12

So tripling the length and reducing the radius by a factor of 2 would increase the conductance by a factor of 12.

Answer:

Reducing the length by a factor of  1/3 and doubling the radius.

Explanation:

this is correct answer, my assignment says

Answer:

3. V = 0.2673 L

4. V = 2.4314 L

5. V = 0.262 L

6. V = 2.224 L

Explanation:

3. assuming ideal gas:

∴ R = 0.082 atm.L/K.mol

∴ V1 = 225 L

∴ T1 = 175 K

∴ P1 = 150 KPa = 1.48038 atm

⇒ n = RT/PV

⇒ n = ((0.082 atm.L/K.mol)(175 K))/((1.48038 atm)(225 L))

⇒ n = 0.043 mol

∴ T2 = 112 K

∴ P2 = P1 = 150 KPa = 1.48038 atm

⇒ V2 = RT2n/P2

⇒ V2 = ((0.082 atm.L/K.mol)(112 K)(0.043 mol))/(1.48038 atm)

⇒ V2 = 0.2673 L

4. gas is heated at a constant pressure

∴ T1 = 180 K

∴ P = 1 atm

∴ V1 = 44.8 L

⇒ n = RT/PV

⇒ n = ((0.082 atm.L/K.mol)(180 K))/((1 atm)(44.8 L))

⇒ n = 0.3295 mol

∴ T2 = 90 K

⇒ V2 = RT2n/P

⇒ V2 = ((0.082 atm.L/K.mol)(90 K)(0.3295 mol))/(1 atm)

⇒ V2 = 2.4314 L

5.  V1 = 200 L

∴ P1 = 50 KPa = 0.4935 atm

∴ T1 = 271 K

⇒ n = RT/PV

⇒ n = ((0.082 atm.L/K.mol)(271 K))/((0.4935 atm)(200 L))

⇒ n = 0.2251 mol

∴ P2 = 100 Kpa = 0.9869 atm

∴ T2 = 14 K

⇒ V2 = RT2n/P2

⇒ V2 = ((0.082 atm.L/K.mol)(14 K)(0.2251 mol))/(0.9869 atm)

⇒ V2 = 0.262 L

6.a)  ∴ V1 = 24.6 L

∴ P1 = 10 atm

∴ T1 = 25°C = 298 K

⇒ n = RT/PV

⇒ n = ((0.082 atm.L/K.mol)(298 K))/((10 atm)(24.6 L))

⇒ n = 0.0993 mol

∴ T2 = 273 K

∴ P2 = 101.3 KPa = 0.9997 atm

⇒ V2 = RT2n/P2

⇒ V2 = ((0.082 atm.L/K.mol)(273 K)(0.0993 mol))/(0.9997 atm)

⇒ V2 = 2.224 L

The volume of a gas at different temperatures while keeping pressure constant can be calculated using Gay-Lussac's law. For the first question, we use the initial volume and temperature to find the final volume when the temperature changes to 112 K, while pressure remains constant.

The volume of a gas at different temperatures and pressures, while some variables are kept constant, can be calculated using the combined gas law when both temperature and pressure change, or Gay-Lussac's law when only temperature changes and pressure stays constant, or Boyle's law when only pressure changes and temperature stays constant.

For the first question: The initial conditions are a volume of 225 L at a temperature of 175 K, and we're asked to find the final volume at 112 K while keeping pressure constant.

Using Gay-Lussac's law: V1/T1 = V2/T2, we rearrange to solve for V2:

V2 = V1 * T2/T1

V2 = 225 L * 112 K/175 K

After performing the calculation, you find the new volume at 112 K.

Answer:

In the typical periodic table, each element is listed by its element symbol and atomic number. For example, “H” denotes hydrogen, “Li” denotes lithium, and so on. Most elements are represented by the first letter or first two letters of their English name, but there are some exceptions.

Each element has a symbol,one or two letters that represent the element much as your initials represent you. The symbol of an element represents one atom of that element.

...

Symbol Element

Cf californium

C carbon

Ce cerium

Cs cesium

Explanation:

The element is the purest form of the atom that is composed of single species. Elements are represented by one or two letter symbols, like He and H.

The purest and the most simplified form of an atom is said to be called an element. Each and every element is said to have a respective atomic mass and atomic number that are denoted with symbols in the periodic table.

The elements are represented as one or two letter symbols in the table along with the atomic number and masses as the superscript and subscript. For example, a hydrogen atom is represented as H, helium as He, neon as Ne, carbon as C, calcium as Ca, oxygen as O, sodium as Na, nitrogen as N, etc.

Therefore, the element in a periodic table is represented by one or two alphabetical symbols.

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Answer:

A single quantity that measures the ionization energy of the valence electrons of an electron. Where a is number of electrons in s subshell and Is is Ionization energy of that subshell. AVEE measures two important qualities: 1.

Explanation:

Final answer:

The AVEE measures the average velocity (Vav) and displacement (Ax), which are essential in the context of work done by an electric force in a uniform electric field.

Explanation:

The AVEE, referring to the average electric potential energy, is used to measure two main quantities in physics: average velocity (Vav) and displacement (Ax). The average electric potential energy (AVEE) is involved when considering the work done by the electric force in moving a charge from one point to another, particularly in a uniform electric field. The concept of AVEE is essential in understanding how charges interact within an electric field. The equation AV = APE and APE = qAV help underline the relationship between the average electric potential energy and these measured quantities.

Answer: It will move down

Explanation: Since there is an unbalanced force on the object its motion is directed on the side with the greatest amount of force.

Final answer:

With a net force of 5N downward, the object will accelerate downward.

Explanation:

If one force on an object is exerted 5N upward and another force is 10N downward, we can calculate the net force to determine the object's motion. By subtracting the upward force from the downward force, we get a net force of 10N - 5N = 5N downward. Since the net force is downward, the object will accelerate in the downward direction according to Newton's Second Law of Motion, assuming no other forces are acting on the object.

Answer: 277.8 L

Explanation: Use Ideal gas law equation:

PV= nRT

At STP: P= 1atm T = 273 K

V= nRT/ P

= 12.4 moles He ( 0.08205 L.atm/mole.K) ( 273 K) / 1 atm

= 277.8 L

The correct characteristics of medusae are: swim freely, have tentacles, mouths open downward.

Medusae are the free-swimming, jellyfish-like form of certain aquatic animals, typically found in the phylum Cnidaria. They are characterized by their ability to swim freely in the water, which distinguishes them from the sessile, or immobile, polyps that are another life stage of cnidarians. Medusae have tentacles that hang down from their bell-shaped bodies, which they use to capture prey. These tentacles are often equipped with stinging cells called nematocysts that help to immobilize their prey. The mouth of the medusa is located on the underside of the body, facing downward, and leads to a gastrovascular cavity where digestion takes place.

To summarize, the following are the characteristics of medusae:

- Swim freely: Medusae are capable of locomotion and can move through the water column.

- Have tentacles: They possess tentacles that extend from their bodies, which are used for capturing food.

- Mouths open downward: The mouth is situated on the ventral side of the medusa, facing downward, which is suitable for bringing captured prey into the gastrovascular cavity for digestion.

The other options listed do not accurately describe medusae:

- Are sessile: This is incorrect because medusae are free-swimming, not immobile.

- Lack tentacles: This is incorrect because tentacles are a defining feature of medusae.

- Mouths open upward: This is incorrect because the mouth of a medusa opens downward.