Why is formula equation more meaningful than a word equation?​

The mass percentage of sodium nitrate in a solution consisting of 73 g of sodium nitrate and 135 g of water is 35.1% and therefore we can say option (a) is correct.

The mass percentage is a concentration term used to describe concentration in solution. It is defined as the percentage of the mass of the solute per mass of the solution.

It can be written as the mass of solute/ mass of solution * 100

According to the question,

mass of the solute = 73 g

mass of the solvent = 135 g

mass of the solution = mass of solute + mass of solvent

= 73 + 105

= 208 g

mass percentage = \(\frac{73}{208} *100\)

= 0.351 * 100

= 35.1 %

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The correct answer is c. 73.6%. The mass percentage of sodium nitrate in the solution is 73.6%.

To find the mass percentage of sodium nitrate in the solution, we need to first calculate the total mass of the solution.

Total mass of solution = mass of sodium nitrate + mass of water
Total mass of solution = 73 g + 135 g
Total mass of solution = 208 g

Next, we need to calculate the mass of sodium nitrate as a percentage of the total mass of the solution.

Mass percentage of sodium nitrate = (mass of sodium nitrate / total mass of solution) x 100%
Mass percentage of sodium nitrate = (73 g / 208 g) x 100%
Mass percentage of sodium nitrate = 35.1%

Therefore, the mass percentage of sodium nitrate in the solution is 73.6%.

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Answer:

\(H _{3}O {}^{ + } \)

Hydroxonium ion

Answer:

that's a difficult question

Explanation:

Sorry!!!!!

According to Hamilton's Rule (Br > C), altruism is supported when the cost (C) is less than the benefit (B) multiplied by the relatedness coefficient (r). Among the given options with B = 20 and r = 0.5, the value of cost that satisfies the condition for altruism is c. Cost = 20.

According to Hamilton's Rule (Br > C), altruistic behavior is favored when the benefit (B) multiplied by the relatedness coefficient (r) is greater than the cost (C). In this case, B = 20 and r = 0.5.

To determine the evidence for altruism, we need to compare the value of cost (C) to the value of B multiplied by r (Br). Let's evaluate each option:

a. Cost = 40:

Since 20 (B) multiplied by 0.5 (r) is equal to 10 (Br), which is less than 40 (C), altruism is not supported.

b. Cost = 30:

Again, 20 (B) multiplied by 0.5 (r) equals 10 (Br), which is less than 30 (C). Therefore, altruism is not supported.

c. Cost = 20:

With a cost of 20, 20 (B) multiplied by 0.5 (r) equals 10 (Br). Since 10 (Br) is equal to 20 (C), this satisfies the condition of Hamilton's Rule, suggesting evidence for altruism.

d. Cost = 15:

With a cost of 15, 20 (B) multiplied by 0.5 (r) equals 10 (Br), which is greater than 15 (C). Thus, altruism is not supported.

e. None of the above:

Since option c (Cost = 20) satisfies the condition of Hamilton's Rule (Br > C), indicating evidence for altruism, the correct answer is not "None of the above."

Therefore, based on Hamilton's Rule (Br > C), the value of cost that yields evidence for altruism in this scenario is c. Cost = 20.

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Correct Answer: Boron family

Answer:

Solid = rocks or other hard stuff

Liquid = water or mild or other stuff likt that

Answer:Ice is an example of a solid. A liquid has a defined volume, but can change its shape. Water is an example of a liquid. A gas lacks either a defined shape or volume.

...

Examples of gases include:

Air.

Natural gas.

Hydrogen.

Carbon dioxide.

Water vapor.

Freon.

Ozone.

Nitrogen.

Explanation:

Answer:

A.

Explanation:

O2 is the correct answer.

Explanation:

On a magnetic susceptibility balance, the O2 species will have the strongest mass shift since stronger paramagnetic species will have a larger mass shift.

The oxygen atoms in the O2 species are paramagnetic because unpaired electrons rotate in the same direction, increasing the magnetic field force. As a result, the oxygen atoms with two unpaired electrons will exhibit the largest mass shift on a magnetic susceptibility balance.

The magnitude of the mass shift is -O2, which increases with species paramagneticity. The mass shift increases with species paramagneticity. Therefore, on a magnetic susceptibility balance, oxygen will have the highest mass shift since it has two unpaired electrons in the molecular orbital diagram.

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Calcite is a carbonate mineral that is composed of calcium carbonate (CaCO3).

Here correct answer is B

When hydrochloric acid (HCl) is added to calcite, it will fizz and release carbon dioxide gas (CO2). This reaction is known as an acid test and is used to identify and test the purity of carbonate minerals.

Other carbonates such as dolomite (CaMg[CO3]2), magnesite (MgCO3), and siderite (FeCO3) will also fizz when exposed to hydrochloric acid.

Quartz (SiO2), fluorite (CaF2), and gold (Au) are all non-carbonate minerals and will not react with hydrochloric acid.

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Answer

The concentration in parts per million (ppm) = 332,000 ppm.

Explanation

Given:

Mass of salt solute = 332 grams

Mass of water solvent = 1000 grams

What to find:

The concentration in parts per million (ppm).

Solution:

The concentration in parts per million (ppm) formula is:

Plugging the values of the given parameters into the formula:

The concentration in parts per million (ppm) = 332,000 ppm.

Both precision and accuracy are vital in scientific experiments, but they stand different aspects of the experimental results.

Precision means how consistent or reproducible the measurements are when you do an experiment many times. If you do the experiment many times and always get similar numbers for the metal's specific heat, then the experiment is considered to be very accurate. Accurate measurements have little variation and give trustworthy information about the possible range where the correct value is expected to be.

Therefore, Accuracy means how well the measured values match the true or expected value. An accurate measurement means that it is very close to the correct or expected value.

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Answer:

Electronegativities generally decrease from top to bottom within a group due to the larger atomic size.

Of the main group elements, fluorine has the highest electronegativity (EN= 4.0) and cesium the lowest (EN=0.79).

Explanation:

Sulfur has the largest electronegative element. Therefore, option C is correct.

Electronegativity is a measure of an atom's ability to attract electrons toward itself in a covalent bond, and it generally increases as you move across a period from left to right in the periodic table.

The type of bond that exists between atoms will depend on the electronegativity of the system.

Out of the given elements, S (sulfur) has the largest electronegativity. Sulfur has an electronegativity value of 2.58 on the Pauling scale, while Na (sodium) has an electronegativity value of 0.93, Mg (magnesium) has an electronegativity value of 1.31, and P (phosphorus) has an electronegativity value of 2.19. Therefore, option C is correct.

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Answer:

no. of carbon atoms = 1.806 × 10²³

Explanation:

The question asks us to find the number of atoms in 3.9 g of benzene.

To do this we must know that the chemical formula of benzene is C₆H₆.

Therefore, the molecular mass of benzene is:

R.M.M = (12 × 6) + (1 × 6)

          = 72 + 6

          = 78

Now that we know the molecular mass of benzene, we have to find the number of moles of benzene in 3.9 g of benzene:

no. of moles = \(\mathrm{\frac{mass}{R.M.M}}\)

                     = \(\frac{3.9}{78}\)

                     = 0.05 mol

From the number of moles, we can find the number of molecules of benzene using the formula:

\(\boxed{\mathrm{no. \ of \ molecules = no. \ of \ moles \times Avogadro's \ number}}\)

where Avogadro's number = 6.02 × 10²³

Therefore,

no. of molecules of benzene = 0.05 × 6.02 × 10²³

                                                = 3.01 × 10²²

Since each molecule of benzene contains 6 atoms of carbon, we have to multiply the number of benzene molecules by 6:
no. of carbon atoms = 3.01 × 10²²  ×  6

                                  = 1.806 × 10²³

Therefore, there are 1.806 × 10²³ atoms of carbon in 3.9 g of benzene.

A solid material with a Fermi level within the band gap between conduction and valence bands is a semiconductor.

A semiconductor is a material that falls somewhere between an insulator like glass and a conductor like copper in terms of electrical conductivity. Its resistivity decreases as its temperature increases; Semiconductors are materials with a conductivity between conductors (usually metals) and non-conductors or insulators (like ceramics).

Metals behave in the opposite way. Compounds like gallium arsenide and pure elements like silicon and germanium are examples of semiconductors. A semiconductor is a material with a higher electrical resistance than insulators but a lower electrical resistance than conductors. As a result, it is able to conduct current more slowly than insulators but does not impede the flow of current like insulators do.

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Sodium fluoride (NaF) is a competitive inhibitor of the enzyme enolase, which is involved in the glycolysis pathway of cellular respiration. When NaF is added to a respiration reaction, it can inhibit the production of pyruvate and consequently decrease the rate of respiration.

However, the addition of pyruvate to a NaF-inhibited respiration reaction can overcome this inhibition by increasing the concentration of substrate available for the Krebs cycle. The Krebs cycle, also known as the citric acid cycle, is responsible for producing ATP, NADH, and FADH2 from acetyl-CoA, which is derived from pyruvate.

By increasing the concentration of pyruvate, the rate of respiration can increase because more pyruvate can be converted to acetyl-CoA, providing more substrate for the Krebs cycle. This leads to an increase in the production of ATP and other products of cellular respiration.

Overall, the addition of pyruvate to a NaF-inhibited respiration reaction can overcome the inhibition of NaF by increasing the concentration of substrate available for the Krebs cycle and ultimately leading to an increase in the rate of respiration.

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Answer:

D.) atomic mass and atomic number

One atom thick film of carbon known as graphene is 200 times stronger than steel and one hundred times thinner than a sheet of paper.

1 atom thick

Pure carbon atoms are arranged in a hexagonal lattice in a single layer to form graphene, which is held together by sp2 bonds. Graphite is composed of layers of graphene. The thinnest material known to exist is graphene, which measures one atom thick (0.345Nm). Actually, it is two-dimensional.

A hexagonal honeycomb lattice securely holds a single layer (monolayer) of carbon atoms together to form graphene. It is an allotrope of carbon with sp2-bonded atoms arranged in a plane and a molecular bond length of 0.142 nanometers.

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Answer:

A Chemical reaction involves changes in energy in the form of absorbtion and release of heat due to the formation and breakdown of chemical bonds. A chemical reaction is categoried as endothermic reaction in which heat energy is take in or absorbed and exothermic reaction in which energy is released.

A model can be created by following below details:

So, the decrease in temperature shows it is an endothermic reaction in which heat energy is absorbed.

Energy change in the reaction has been stored in the products and the reactants. The change in the reactant to product results in a change in energy.

According to the law of conservation of energy, energy can neither be created nor destroyed in a chemical reaction. The chemical reaction has been resulted in the energy change by the endothermic and exothermic reactions.

The project model for energy change can be:

Reactant + Energy = Products.

The ice cube has been placed in a beaker. It has been consisted of the stored potential energy. WIth the application of heat energy there has been the conversion of ice cubes to the water, and the potential energy of the ice cubes has been converted to the kinetic energy of the moving liquid particles.

Reactant = Product + Energy

The model has consisted of matching the light with a matchstick. The chemical energy of the stored matchstick has been converted to light and heat energy.

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The specific heat capacity of the metal : c = 2.59  J/g °C

Given

5 g sample

35 ml water = 35 g

Required

The specific heat capacity of the metal

Solution

Heat can be formulated :

Q = m.c.Δt

Q in = Q out

Q absorbed = Q released

Q water = Q metal

35 g x 4.184 J/g °C x (26.5-20)= 5 x c x (100-26.5)

951.86 J = 367.5 x c

c = 2.59  J/g °C

Answer:

F = 130 N

Explanation:

We use the formula F = ma  

∴ F is force, m is mass and a is acceleration

F = ?

m = 65 kg

a = 2 m/\(s^{2}\)

Substituting the values in the equation:

F = 65 x 2

F = 130 N

Answer: Groups

Explanation:

I took the quiz

Answer:

To make sure all the sulphuric acid has been used up

3-Methylpentane is the IUPAC name for the substance.

whether in a continuous chain or a ring, the longest chain of carbons joined by a single bond serves as the basis for IUPAC nomenclature. According to a precise set of priorities, all deviations—whether they involve numerous bonds or atoms other than carbon and hydrogen—are denoted by prefixes or suffixes.

+3-Methylpentane is the IUPAC name for the substance in question. It has a lengthy chain of 5 carbon atoms, which gives it the prefix pent-, and a single bond is what gives it the postfix -ane (alkane). Given that the methyl group is present at the third carbon, it is 3-methylpentane.

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Answer: Magnet

Explanation:Using a magnet is the best separating technique to be deployed in this case. The nails are easily picked out by just holding a magnet over the sandbox.

The molarity of the CaCl₂ solution, which contains 2.5 moles of CaCl₂ in one liter, is 2.5 mol/L.

Molarity is a measure of the concentration of a solute in a solution, expressed as the number of moles of solute per liter of solution (mol/L). In this case, the given information states that one liter of the CaCl₂ solution contains 2.5 moles of CaCl₂.

To calculate the molarity, we divide the number of moles of solute (CaCl₂) by the volume of the solution in liters (1 L):

Molarity = Number of moles of solute / Volume of solution (in liters)

Molarity = 2.5 moles / 1 L

Molarity = 2.5 mol/L

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Answer:

"Hey, Nate, how's life?"

I don't know, it's alright

I've been dealin' with some things like every human being

And really didn't sleep much last night (last night)

"I'm sorry", that's fine

I just think I need a little me time

I just think I need a little free time

Little break from the shows and the bus rides (bus rides), yeah

Last year I had a breakdown

Thoughts tellin' me I'm lost gettin' too loud

Had to see a therapist, then I found out

Somethin' funny's goin' on up in my house

Yeah, I started thinkin' maybe I should move out

You know, pack my car, take a new route

Clean up my yard, get the noose out

Hang up my heart, let it air out (air out)

I've been searchin'

"What does that mean, Nate?"

I've been learning

Grabbin' my keepsakes, leavin' my burdens

Well, I brought a few with me, I'm not perfect

Lookin' at the view like, this concerns me

Pickin' up the cues, right? I'm quite nervous

Hate it when I lose sight, life gets blurry

And things might hurt me

It's prolly gonna be a long journey, but hey (but hey)

It's worth it, though

Cold world out there, kids, grab your coats

Been a minute, I know, now I'm back to roam

Lookin' for the antidote to crack the code

Pretty vivid, I admit it, I'm in classic mode

Don't need pity given to me, but I can't condone

Talkin' down to me, I'ma have to crack your nose for crackin' jokes

I'm lookin' for the map to hope, you seen it? (You seen it?)

Been makin' a whole lot of changes

Wrote a song about that, you should play it

I get scared when I walk on these stages

I look at the crowd and see so many faces, yeah

That's when I start to get anxious

That's when my thoughts can be dangerous

That's when I put on my makeup and drown in self-hatred

Forget what I'm saying, and

Where'd the beat go?

Oh, ain't that somethin'?

Drums came in, you ain't see that comin'

Hands on my head, can't tell me nothin'

Got a taste of the fame, had to pump my stomach

Throw it back up like I don't want it

Wipe my face, clean up my vomit

OCD, tryna push my buttons

I said don't touch it, now y'all done it

I can be critical, never typical

Intricate with every syllable, I'm a criminal

Intimate, but never political, pretty visual

Even if you hate it, I'll make it feel like you're in it, though

You call me what you wanna, but never call me forgettable

Leave you deep in thought, I could never swim in the kiddie pool

Way that I been thinkin' is cinematic, it's beautiful

Man, I don't know if I'm makin' movies or music videos (videos, videos, videos)

Yeah, the sales can rise

Doesn't mean much though when your health declines

See, we've all got somethin' that we trapped inside

That we try to suffocate, you know, hopin' it dies

Try to hold it underwater but it always survives

Then it comes up out of nowhere like an evil surprise

Then it hovers over you to tell you millions of lies

You don't relate to that? Must not be as crazy as I am

The point I'm makin' is the mind is a powerful place

And what you feed it can affect you in a powerful way

It's pretty cool, right? Yeah, but it's not always safe

Just hang with me, this'll only take a moment, okay?

Just think about it for a second, if you look at your face

Every day when you get up and think you'll never be great

You'll never be great, not because you're not, but the hate

Will always find a way to cut you up and murder your faith (woo!)

I am developin', take a look at the benefits

Nothin' to meddle with, I can never be delicate

Am I even relevant? That depends how you measure it

Take a measurement, then bag it up and give me the evidence

Pretty evident, dependable can never be tentative

I'm a gentleman, depending on if I think you're genuine

Pretty elegant, but not afraid to tell you to get a grip

Proper etiquette, I keep it to myself when I celebrate, ah (ah)

It's that time again

Better grab your balloons and invite your friends

Seatbelts back on, yeah, strap 'em in

Look at me, everybody, I'm smilin' big

On a road right now that I can't predict

Tell me "Tone that down, " but I can't resist

Y'all know that sound, better raise your fist

The search begins, I'm back, so enjoy the trip, huh

Explanation:

In chemical change, the chemical composition of substance changes while in physical changes the chemical composition remains the same.

Chemical changes are defined as changes which occur when a substance combines with another substance to form a new substance.Alternatively, when a substance breaks down or decomposes to give new substances it is also considered to be a chemical change.

There are several characteristics of chemical changes like change in color, change in state , change in odor and change in composition . During chemical change there is also formation of precipitate an insoluble mass of substance or even evolution of gases.

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Answer:

Explanation:

The volume of a substance when given the density and mass can be found by using the formula

\(volume = \frac{mass}{density} \\\)

From the question

mass of metal = 300 g

density = 7.13 g/mL

We have

\(volume = \frac{300}{7.13} \\ = 42.07573632...\)

We have the final answer as

Hope this helps you