A scuba diving tank at a pressure of 180 atmospheres contains a mixture of three gases: oxygen, helium, and nitrogen. The partial pressures of the oxygen and helium are 81 atmospheres and 58 atmospheres, respectively. What is the partial pressure of nitrogen in the tank?

The pH during the titration 30.0 mL OF 0.1000 M NaOH(aq) with 0.1000 M HCl(aq) of after 18.5 mL of the acid is added is : 12.38

First step : Determine the number of moles

Number of moles of NaOH = 0.1000 M * 30.00 mL = 3.0 mmol

Number of moles of HCl = 0.1000 M * 18.5 mL =  1.85 mmol

The net moles of NaOH = 3.0 mmol - 1.85 mmol = 1.15 mmol

Next step :

The total volume of the solution = 30.00 + 18.51  = 48.51 mL

[ NaOH ] = [ OH⁻ ] = net moles / total volume

                             = 1.15 mmol / 48.5 mL = 0.023711 M

Final step : Determine the pH value

pOH = – log[OH⁻] = – log ( 0.023711 )

                             = 1.625

Therefore :

pH value = 14 - pOH

               = 14 - 1.625 ≈ 12.38

Hence we can conclude that The pH during the titration of after 18.5 mL of the acid is added is : 12.38

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Answer:

When the glass rod is rubbed with a silk cloth,  The glass quickly loses electrons, and the silk takes the electrons out of the glass rod. So after rubbing, the glass rod becomes positively charged and the silk gets negative charge. So glass acquires a greater order than silk as electron losses.

Explanation:

Answer:  True

Explanation: Transferring energy to or from a substance can change its state. Heating a substance in the solid state will cause it to melt, which changes it to the liquid state. Continued heating will cause the substance to evaporate or boil, which changes it to the gas state.

Some substances in the solid state can change straight to the gas state. This process is called sublimation.

A substance in the gas state condenses when it is cooled, which changes it to the liquid state. Continued cooling causes it to freeze, which changes it to the solid state.

Answer:

The boiling point will be reduced

Answer:

530 g

Explanation:

1 mole of Sodium Carbonate = 106g

5 moles = 106*5 = 530g

Answer:

Example 1 represents a solid and Example 2 represents a gas.

Explanation:

Solids usually have closely packed molecules and gas molecules usually exhibit constant random motion.

Answer:

=> The formulas are written above .

Explanation:

hope it's helpful

Since rusting is a chemical change, the chain changed its composition as a result of oxidation of iron to hydrated iron(iii) oxide

Chemical changes are changes which occur as a result of chemical reactions which occur in substances resulting in the production of new substances.

An example of a chemical change is rusting of iron.

Rusting of iron occurs as a result of the oxidation of iron when exposed to air and water.

The picture shows rusting of iron.

Therefore, the chain changed its composition as a result of oxidation of iron to hydrated iron(iii) oxide.

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Is male circle or square? and is the disorder black or white?

Answer:2 duce dose

Explanation:

jit you see the picture now vote

Answer:

Polymer can be both natural and synthetic

Explanation:

Answer:

You could write about someone stealing something

Explanation:

And further explain the panic you felt and how the atmosphere changed

Answer:

Geology in everyday life is not restricted to resources. It is also about hazards and risk associated with rock falls, radon, landslides, quick clay, landslides and earthquakes. Geology is detective work. Geology helps us understand climate change in the past, which may help us predict future scenarios.‏

Explanation:

We have that for the Question "describe 3 ways rocks make our lives easier?" it can be said that 3 ways rocks make our lives easier is

From the question we are told

Describe 3 ways rocks make our lives easier?

Generally

There are many ways that rocks help us a human every day but these as very distinnctive 3

Metals are made from rocks,Rocks are melted and used to make metals using

variant method

Rocks have for the longest time helped us in representation of words and letter,inscriptions in general over the years

Rocks are the source of the worlds most renounced jeweries as the beauty are priced highly

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Answer:

D. Chromosomes

Explanation:

        The DNA is found in the nucleus of each cell. It is in "thread-like" structures, which are called "D. Chromosomes."

Answer:

gives shape and support to the body

Answer:

Gives shape and support to the body

Explanation:

Explanation:

write a news story using the clues given below

the reactions at the cathode:

1. the reduced active metal is water, other than that the metal will be reduced

2. H⁺ of the acid will be reduced

the reactions at the anode:

1. if the electrodes are not inert then the metal is oxidized

2. If inert then:

a. OH⁻ from the base will be oxidized

b. The halogen metal will oxidize

1. HCl

H⁺ of the acid will be reduced

Cathode: 2H⁺(aq) + 2e⁻ ⇒ H₂(g)

The halogen metal will oxidize

Anode: 2Cl⁻(aq) ⇒ Cl₂(g) + 2e⁻

2. NaNO₃

Na : active metal, water reduced

Cathode: 2H₂O + 2e ⇒ 2OH- + H₂

NO₃: oxyacid, water will be oxidized

Anode: 2H₂O ⇒ 4 H + + O₂ + 4e

3. CuCl

Cu : not active metal

Cathode: Cu²⁺ (aq) + 2e ⇒ Cu (s)

Cl : The halogen metal will oxidize

Anode: 2Cl⁻ (aq) ⇒ Cl₂ (g) + 2e

Answer:

1)Br

2)Ar[4s,3d,4p1]

3) 7e

4) kr

Answer:

87.5 mi/hr

Explanation:

Because a = Δv / Δt (a = vf - vi/ Δt), we need to find the acceleration first to know the change in velocity so we can determine the final velocity.

vf = 60 mi/hr

vi = 0 mi/hr

Δt = 8 secs

a = vf - vi/ Δt

= 60 mi/hr - 0 mi/hr/ 8 secs

= 60 mi/hr / 8 secs

= 7.5 mi/hr^2

Now that we know the acceleration of the car is 7. 5 mi/hr^2, we can substitute it in the acceleration formula to find the final velocity when the initial velocity is 50 mi/hr after 5 secs.

vi = 50 mi/ hr

Δt = 5 secs

a = 7.5 mi/ hr^2

a = vf - vi/ Δt

7.5 = vf - 50 mi/hr / 5 secs

37.5 = vf - 50

87.5 mi/ hr = vf

Given parameters:

duration of fall  = 6s

Unknown:

Speed of the rock before it hits the ground  = ?

Solution:

To solve this problem, we apply one of the appropriate motion equations;

           V = u + gt

Where V is the final velocity

           u is the initial velocity

           t is the time taken

           g is the acceleration due to gravity  = 9.8m/s²

The initial velocity is 0;

     So;

              V = gt

Input the parameters and solve for V;

                V = 9.8 x 6  = 58.8m/s

The velocity before hitting the ground is 58.8m/s

Answer:

A.

Explanation:

The melting of wax is just a physical change, not a chemical one, since melted wax can still reharden and go back to its original state. All the other choices are non-reversible, chemical changes.

Hopefully this helps- let me know if you have any questions!

Answer:

Melting of candle wax when heated

Explanation:

So what's the difference

We can get candle wax back when we melted it so it's physical reaction

those r deep questions.. it all depends on if ur religious and if so wht that religion is

Who ever is reading this:

I love u.

U matter.

The world needs u

hang in there ik it may be bad but u deserve the world <3

ur beautiful  no matter ur shape, size, color, gender.. anything

don't give up bby i need u to live.

i wish i could take everyones problems so yall wouldn't have to have em but i cant so just know ily and if anyone needs to talk u can talk to me

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Answer:

If a mineral with a density of 6 g/cm3 is broken into 3, the density of each new piece is 6 [tex]\frac{g}{cm^{3} }[/tex]

Explanation:

Density is a quantity that allows us to measure the amount of mass in a certain volume of a substance. In other words, density is the property that matter, whether solid, liquid or gas, has to compress into a given space, the amount of mass per unit volume.

As density is a physical property of matter that is defined as the ratio of an object's mass to its volume, each material or substance has its own density regardless of its size because the ratio between mass and volume is the same.

If a mineral with a density of 6 g/cm3 is broken into 3, the density of each new piece is 6 [tex]\frac{g}{cm^{3} }[/tex]

Answer:

answer is a supersaturated

Explanation:

Answer:

m=26.0 g

v₁=13.2 mL

v₂=23.5 mL

p=m/(v₂-v₁)

P=26.0/(23.5-13.2)=2.524 g/cm³

Explanation:

hope this helps!

have a good day!

Pipettes and volumetric flasks are types of glassware to be used where accuracy of the concentration is important.

These are usually made of glass and are involved in scientific processes in the laboratory.

Glasswares such as Pipettes and volumetric flasks have standard readings which ensures that the accuracy of a measurement is guaranteed.

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Answer:

b) Na, Mg, K

Hope it helps you

Answer:

Hello

12 grams

The mass of one mole of carbon-12 atoms is 12 grams.

Hope it helps You.....

Explanation:

Answer:

degree to which a substance dissolves in a solvent to make a solution

is this ok

Answer:

Have Fun

Explanation: