If you made 10.8 moles of AlCl₃, how many moles of Aluminum would you need?

Answer:

a liquid cooling

Explanation:

Liquid cooling results in liquid (more disorder) turning to solid (less disorder).

Entropy describe disorder in our system. Going from more disorder to less disorder decreases entropy.

Rest of the options increase entropy b/c gas escaping from tire releases gas from confined shape to vast environment, snow melting turns solid (order) into liquid (less order), and salt dissolving turns solid into liquid form.

Answer:

because of the substance contained in a fire extingudher it woulfnt start a fire.

Answer:

Archery

Explanation:

Archery is scored based on point values assigned to the rings on the target.

The required partial pressure of argon gas present in the mixture is 1.02 atm.

Dalton's law of gas states that total pressure of any mixture of gas is sum of the partial pressure of all the gases present in that mixture.

Given that,

Total pressure of mixture = 2.4 atm

Partial pressure of argon = ?

Partial pressure of oxygen = 128 mmHg = 0.168 atm

Partial pressure of helium = 167.5 mmHg = 0.220 atm

Partial pressure of neon = 760 mmHg = 1 atm

On putting all these values according to the definition we get the partial pressure of argon gas as:
Partial pressure of argon = 2.4 - (0.168 + 0.22 + 1) = 1.02 atm

Hence required partial pressure of argon gas is 1.02 atm

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Q=mcΔt

669440 = 2.10³ x 4.184 x (100-20)

669440 = 669440 √ (correct)

Answer:

B

Explanation:

Smaller pieces results in a larger surface area, therefore the answer is beaker B.

Answer:

I need more info

Explanation:

Answer:

990

Explanation:

Explanation:

Ideal Gas Law

PV = n R T

V = n R T / P     n = moles    R = gas constant = .082057   L atm / ( K mol)

                         T is in Kelvin

V =  .25 moles * .082057 * (273.15 + 57) K / .82 atm = 8.3 moles

   ( two Sig Dig)

Explanation:

4Ag + O2 -> 2Ag2O

Combination reaction

Synthesis reaction

the reaction of 2 elements forming compounds

4Ag + O₂ ⇒ 2Ag₂O

Answer:

HCI

Explanation:

thats the sorrect one

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Answer:

an element.

Explanation:

When all the atoms contain a nucleus with the same amount of protons then each atom is classified as the same element. Hence multiple atoms and a larger quantity of atoms of the same element is still just the same single element.

Answer:

Organic matter is composed of living things (plant roots and organisms), dead things (recent plant and animal residue), and very dead things (highly decomposed material, or humus).

Explanation:

hope this helps if not let me know have a great day

Answer:

PbBr2 + LiNO3

And goodluck

Mole O2 = 9.10 g/32 g/mol = 0.2844 mol From the balanced equation, the mole ratio of O2 to Al2O3 is 3:2. This means that 3 moles of O2 react with Al to produce 2 moles of Al2O3.

The heat involved in the dissolution of sodium hydroxide in the 100 mL of water is 5104.48 J

Heat lost by NaOH = heat gained by the water

Thus, we shall determine the heat gained by the water in order to obtain the heat of dissolution of NaOH.

The heat gained by the water can be obtained as follow:

Q = MCΔT

Q = 100 × 4.184 × 12.2

Q = 5104.48 J

Thus, the heat of dissolution of NaOH is 5104.48 J

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Answer:

A

Explanation:

To calculate questions like this, you need to make use of the equation below:

E = hν

E is the energy, h is Planck's constant, and ν is the frequency.

Also, another important formula you need for this question is the following:

ν = c / λ

ν is the frequency, c is the speed of light, and λ is the wavelength.

Therefore, E = hν = hc/λ.

Also remember to convert nm wavelength to meters.

To answer the question, E = hc/λ = ((6.626*10^-34 J•s)(3*10^8 m/s))/(4.45*10-7 m) = 4.42 • 10^-19 J = A

The quantity of SF6 that we can get is = 228.2g

The quantity of S that reacted = 50g

The quantity of F2(g)that reacted = 105.0g

Therefore the quantity of SF6 that will be produced = ?

But molar mass of sulphur = 32g/mol

molar mass of SF6(g)= 146.06 g/mol

If 32g of S = 146.06 g of SF6

50 g of S = x

Make X the subject of formula,

X = 50×146.06/32

X = 7303/32

X = 228.2g of S

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Answer:

Am I the bad guy for killing my fish, let me explain?

Explanation:

The fish said a bad word that was incredibly inappropriate, so then I told him to never say that again. He responds with, "No, I CAN SAY WHATEVER I WANT." After that I told him to not yell at me and then I killed him, remember he's a fish (GoldFISH).

Answer:

0.047

Explanation:

mass percent is part/whole mass

mass number = proton+neutron

mass number = 43+55 = 98

atomic number = proton = 43

charge = proton - electron = 43 - 39 = +4

symbol : ⁹⁸Tc⁺⁴

[tex]3.9 ~\text{kcal} = 3.9 \times 1000 ~ \text{cal} = 3900~ \text{cal.}[/tex]

Answer:

The salt bridge serves to complete the electrical circuit in the galvanic cell. It is pertinent that the salt bridge ions are in high concentrations as this allows electron mobility and keeps each half cell electronically neutral. The diluted salt bridge wuld cause a buildup of positive charge in the anode and negative charge in the cathode and the electrode half reactions which either reduce or oxidise species would halt. Causing the cell to stop producing electronic energy, impedeing the proper functioning of the galvanic cell.

The wavelength of the wave having a frequency of 60 Hz and a speed of 45 m/s is 0.75 m (Option A)

The velocity, frequency and wavelength are related according to the following equation:

v = λf

where

λ = v / f

λ = 45 / 60

λ = 0.75 m

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