Argon Mass Number



About Argon; Argon weighs 0.0017838 gram per cubic centimeter or 1.7838 kilogram per cubic meter, i.e. Density of argon is equal to 1.7838 kg/m³; at 0°C (32°F or 273.15K) at standard atmospheric pressure.In Imperial or US customary measurement system, the density is equal to 0.11136 pound per cubic foot lb/ft³, or 0.0010311 ounce per cubic inch oz/inch³.

Molar mass of Ar = 39.948 g/mol

  • I assume this is for a chemistry class or something, and are probably expected to determine this using molar mass and avogadro's number (6.022e23 atoms per mole) 1 mole of gold is 196.97 grams since 196.97 is the molar mass. A mole of anything, has 6.022e23 atoms (for elements) or molecules (for compounds) per 1 mole of whatever substance it is.
  • Do a quick conversion: 1 moles Argon = 39.948 gram using the molecular weight calculator and the molar mass of Ar. Check the chart for more details.
Mass

Convert grams Ar to moles or moles Ar to grams


Symbol# of AtomsArgonAr39.9481100.000%



In chemistry, the formula weight is a quantity computed by multiplying the atomic weight (in atomic mass units) of each element in a chemical formula by the number of atoms of that element present in the formula, then adding all of these products together.

If the formula used in calculating molar mass is the molecular formula, the formula weight computed is the molecular weight. The percentage by weight of any atom or group of atoms in a compound can be computed by dividing the total weight of the atom (or group of atoms) in the formula by the formula weight and multiplying by 100.

A common request on this site is to convert grams to moles. To complete this calculation, you have to know what substance you are trying to convert. The reason is that the molar mass of the substance affects the conversion. This site explains how to find molar mass.

Using the chemical formula of the compound and the periodic table of elements, we can add up the atomic weights and calculate molecular weight of the substance.

Mass

The atomic weights used on this site come from NIST, the National Institute of Standards and Technology. We use the most common isotopes. This is how to calculate molar mass (average molecular weight), which is based on isotropically weighted averages. This is not the same as molecular mass, which is the mass of a single molecule of well-defined isotopes. For bulk stoichiometric calculations, we are usually determining molar mass, which may also be called standard atomic weight or average atomic mass.

Finding molar mass starts with units of grams per mole (g/mol). When calculating molecular weight of a chemical compound, it tells us how many grams are in one mole of that substance. The formula weight is simply the weight in atomic mass units of all the atoms in a given formula.

Argon Number Of Electrons

Number

Formula weights are especially useful in determining the relative weights of reagents and products in a chemical reaction. These relative weights computed from the chemical equation are sometimes called equation weights.

Mass

Chemical properties of argon - Health effects of argon - Environmental effects of argon

18

Atomic mass

39.948 g.mol -1

Electronegativity according to Pauling

unknown

Density

1.78.10 -3 g.cm -3 at 0 °C

Melting point

-189 °C

Boiling point

-185.7 °C

Vanderwaals radius

0.192 nm

Ionic radius

unknown

Isotopes

6

Electronis shell

[Ne] 3s23p6

Energy of first ionisation

1520 kJ.mol -1

Energy of second ionisation2665.8 kJ.mol -1
Energy of third ionisation3931 kJ.mol -1

Discovered by

Video star for mac. Sir Ramsay in 1894


Argon

Argon was suspected to be present in air by Henry Cavendish in 1785 but wasn't discovered until 1894 by Lord Rayleigh and Sir William Ramsay.

Argon is the third noble gas, in period 8, and it makes up about 1% of the Earth's atmosphere.

Argon has approximately the same solubility as oxygen and it is 2.5 times as soluble in water as nitrogen . This chemically inert element is colorless and odorless in both its liquid and gaseous forms. It is not found in any compounds.

This gas is isolated through liquid air fractionation since the atmosphere contains only 0.94% argon. The Martian atmosphere in contrast contains 1.6% of Ar-40 and 5 ppm Ar-36. World production exceeds 750.000 tonnes per year, the supply is virtually inexhaustible.

Applications

Argon does not react with the filament in a lightbulb even under high temperatures, so is used in lighting and in other cases where diatomic nitrogen is an unsuitable (semi-)inert gas.
Argon is perticularly important for the metal industry, being used as an inert gas shield in arc welding and cutting. Other uses incude non-reactive blanket in the manufacture of titanium and other reactive elements and as a protective atmosphere for growing silicon and germanium crystals. Argon-39 has been used for a number of applications, primarily ice coring. It has also been used for ground water dating. Argon is also used in technical SCUBA diving to inflate the drysuit, due to its nonreactive, heat isolating effect.
Argon as the gap between the panes of glass provides better insulation because it is a poorer conductor of heat than ordinary air. The most exotic use of argon is in the tyre of luxury cars.

Argon in the environment

In earth's atmosphere, Ar-39 is made by cosmic ray activity, primarily with Ar-40. In the subsurface environment, it is also produced through neutron-capture by K-39 or alpha emission by calcium. Argon-37 is produced from the decay of calcium-40, the result of subsurface nuclear explosions. It has a half-life of 35 days.

Argon is present in some potassium minerals because of radiactive decay of the isotope potassium-40

Health effects of argon

Routes of exposure: The substance can be absorbed into the body by inhalation.

Inhalation risk:On loss of containment this liquid evaporates very quickly causing supersaturation of the air with serious risk of suffocation when in confined areas.

Effects of exposure: Inhalation: Dizziness. Dullness. Headache. Suffocation. Skin: On contact with liquid: frostbite. Eyes: On contact with liquid: frostbite.

Inhalation: This gas is inert and is classified as a simple asphyxiant. Inhalation in excessive concentrations can result in dizziness, nausea, vomiting, loss of consciousness, and death. Death may result from errors in judgment, confusion, or loss of consciousness which prevent self-rescue. At low oxygen concentrations, unconsciousness and death may occur in seconds without warning.

The effect of simple asphyxiant gases is proportional to the extent to which they diminish the amount (partial pressure) of oxygen in the air that is breathed. The oxygen may be diminished to 75% of it's normal percentage in air before appreciable symptoms develop. This in turn requires the presence of a simple asphyxiant in a concentration of 33% in the mixture of air and gas. When the simple asphyxiant reaches a concentration of 50%, marked symptoms can be produced. A concentration of 75% is fatal in a matter of minutes.

Symptoms: The first symptoms produced by a simple asphyxiant are rapid respirations and air hunger. Mental alertness is diminished and muscular coordination is impaired. Later judgment becomes faulty and all sensations are depressed. Emotional instability often results and fatigue occurs rapidly. As the asphyxia progresses, there may be nausea and vomiting, prostration and loss of consciousness, and finally convulsions, deep coma and death.

Environmental effects of argon

No known ecological damage caused by argon.

No adverse environmental consequences are expected. Argon gas occurs naturally in the environment. The gas will dissipate rapidly in well ventilated areas.

The effects of argon on plants or animals is not currently known. It is not expected to harm aquatic life. Adobe in design cs5 for mac.

Argon does not contain any ozone depleting chemicals and is not listed as a marine pollutant by DOT (Department of Transportation, USA).


Now check out our page on argon in water

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