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# A cylinder of Argon gas contains 50 L of Ar at 18.4 atm and 127 celcius . How many moles of argon are in the cylinder

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And using that equation you get........
76.7133 moles
.

Posted on Sep 15, 2015

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Use the ideal gas law PV=NRT with T in Kelvin.

Posted on Sep 14, 2015

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1 Answer

### What is a Neutron for argon

what a trick question??? a neutron is a charged particle ...argon is a gas.. it has many applications.. most recently in specialized lighting..argon is being used in some vehicle lighting because its brighter with less power usage...now whats the problem...

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### Two baloons are at the same temperature and pressure. one contains 8g of helium and the other contain 80g of argon

If there is a question you are not asking it.
Now let us try to find out what the question might have been.
Assuming that both gases follow the ideal gas law, we have for both gases PV=nRT where P is the pressure, V the volume, T the absolute temperature, R the gas constant, and n the number of moles.
Let subscript _1 refer to the Helium gas and _2 to the Argon gas. You can write
1. P_1*V_1=n_1*R*T_1
2. P_2*V_2=n_2*R*T_2
Divide the left sides one by the other and do the same for the right sides. Since P_1=P_2 and T_1=T_2 there are cancellations and you are left with
(V_1/V_2)=(n_1/n_2)
That is all you can say: The ratio of the volumes is equal to the ratio of the numbers of moles.
Now using the molar masses of the gases (M_1=4 g, and M_2=40 g) you find n_1 is about 2 moles and n_2 is also about 2 moles. The conclusion is that the two balloons have approximately the same volume.
Note:You can use more accurate molar masses for the gases but that will not change the conclusion.
The question should have been: What is the ratio of the volumes of the balloons?

Apr 26, 2013 | Multimedia Science Chemistry GamesLabsand...

1 Answer

### I have a lincoln power mig 255 and every time i weld little holes appear in the welds. what could this be?

Hi:

This could be a problem of gthe gas you are using. Make sure to use mix 75/25 argon/CO2 for mild steel welding, argon 100% for aluminum and trimix helium/argon/CO2 for stainless steel.
Also check your heat (voltage) 16-22 is enough for weld of most steels less than 1/2 inch.

Aug 06, 2011 | Lincoln Magnum 100L 10' 025035

1 Answer

### Have a lincoln sp200. Trying to run aluminum wire not having any luck. I am running straight argon gas, I get basically a glow the wire melts no penetration. Do I need to reverse polarity or what. I...

Hi:

You should only reverse polarity only if, before you were using innershield wire on the same MIG welder.
Your gun should be connected to + and ground to negative and you should use a spool gun for it.

Argon gas is ok, but for thick metals 1/4" and above you should use a mix of 75/25 argon/helium.

Good luck!

Jul 10, 2011 | Lincoln Welding Tools

1 Answer

### New at welding jewelry. was given a puk 111. have not got the argon as yet. should the unit still produce an arc even without the gas? i have no arc at any of the settings. what am i missing. thanks.

Argon is an inert gas and in welding is used to produce a shield around the weld. It protects the work from impurities. The arch comes directly from amperage shorting to ground through the rod. The heat generated from this short melts the rod into the work. In short, the welder should work without the Argon and needs only Amperage in the rod and a good ground to create an arch. Double check the ground on the work. In this case, your Ring. Please rate this answer for me and feel free to write again. Thank You.
Roger

Apr 03, 2011 | Welding Tools

1 Answer

### Does welder need argon gas when using steal wirer

Hi:

If you are using solid mild steel core wire, yes you need a mix of gas Argon/CO2 75/25.

Only cored shielded wire do not required gas (also called innershield or flux cored).

Adjust your flow rate for the mild steel wire at 20 or 25 scfh, depending if you are welding inside or outside a shop.

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