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# To identify a diatomic gas (X2), a researcher carried out the following experiment:?

Topic: As a researcher
June 17, 2019 / By Ulla
Question: To identify a diatomic gas (X2), a researcher carried out the following experiment: She weighed an empty 1.00- L bulb, then filled it with the gas at 1.10 atm and 23.0 degree celcius and weighed it again. The difference in mass was 1.27 g. Identify the gas. Enter the molecular formula using element symbols and subscripted numbers. For example, water would be entered as H_2O.

## Best Answers: To identify a diatomic gas (X2), a researcher carried out the following experiment:?

Sara | 5 days ago
use the relation pv=nrt where r=.08205 units 1.1*1=1.27/M*0.08205*(273+23) so m=28 this is the molecular weight of ethylene(C2H4)
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Originally Answered: All known diatomic gas elements?
Did you know that diatomic molecules make up the majority of the Earth's atmosphere? Diatomic molecules are made up of two atoms. In this lesson, we will discuss diatomic molecules and go over some examples. What Is a Diatomic Molecule? In Greek, the prefix 'di-' means 'two.' Knowing that, it isn't hard to guess that diatomic molecules are molecules composed of only two atoms. What you may not realize is that diatomic molecules are all around us. The Earth's atmosphere is mainly composed of the diatomic molecules oxygen (O2) - about 21% and nitrogen (N2) - about 78%. The subscript 2 of oxygen and nitrogen indicates the number of oxygen atoms and nitrogen atoms. So the oxygen molecules present in the atmosphere have two oxygen atoms and the nitrogen molecules have two nitrogen atoms. There are also other diatomic molecules that we encounter every day. Carbon monoxide (or CO) is produced from combustion fumes of cars and trucks and is made of one carbon atom and one oxygen atom. Hydrochloric acid (HCl) is present in the gastric acid produced by our stomach and is a common acid that we use in the chemistry lab. It is made of one hydrogen atom and one chlorine atom. Diatomic molecules are either homonuclear or heteronuclear. Homonuclear diatomic molecules are composed of two atoms of the same element, like in the case of oxygen and nitrogen shown in the illustration here. Heteronuclear diatomic molecules are composed of two atoms of different elements, like in the case of hydrochloric acid and carbon monoxide. The two atoms in a diatomic molecule are connected in a straight line. The molecular geometry, which is what describes the shape of a diatomic molecule, is representative of linear geometry. Shown here are the structures, which show how atoms are bonded in the molecule and lone pairs of electrons, of the diatomic molecules O2, N2, HCl, and CO. The red dots represent the electrons and the lines represent the bonds. We can see here that the diatomic molecules exhibit linear molecular geometry. Homonuclear Diatomic Molecules There are seven elements that occur naturally as homonuclear diatomic molecules. All of these molecules are in the gaseous state. Five of these elements - hydrogen (H2), nitrogen (N2), oxygen (O2), fluorine (F2), and chlorine (Cl2) - occur as diatomic elements at room temperature, which is 25 degrees Celsius. At slightly higher temperatures, iodine (I2) and bromine (Br2) exists as homonuclear diatomic molecules. A useful mnemonic device to remember the seven homonuclear diatomic molecules that exist is: Have No Fear Of Ice Cold Beer. Mnemonic Device for Homonuclear Diatomic Molecules Heteronuclear Diatomic Molecules Heteronuclear diatomic molecules consist of two atoms of two different elements. There is an abundance of heteronuclear molecules. Two types of bonding can occur in a heteronuclear diatomic molecule: ionic and covalent. Ionic bonding occurs when a metal bonds with a nonmetal. Covalent bonding occurs when two nonmetals bond together. How do we know if an element is a metal or a nonmetal? We refer to the periodic table: All elements, except for hydrogen, at the left side of the stairs are classified as metals and all elements at the right side of the stairs are classified as nonmetals. 1 Lewis Dot Formulas of Atoms z Lewis dot formulas or Lewis dot representations are a convenient bookkeeping method for tracking valence electrons . • Valence electrons are those electrons that are transferred or involved in chemical bonding. 2 Formation of Covalent Bonds z We can use Lewis dot formulas to show covalent bond formation. 1. H 2 molecule + H . H . H H . . or H 2 H Cl H Cl + . .. . . . . . . .. .. .. . or HCl 2. HCl molecule 3 Lewis Dot Formulas of Atoms 1S 2 2S 2 2P 2 Li Be B C N O F Ne .. .. .. .. .. He H . . .. . .. .. .. .. . . . . . . . . . . . . . .. . 1S 2 2S 2 2P 5 4 z Elements in the same periodic group have the same Lewis dot structures. 5 Lewis Formulas for Molecules z First, we explore Lewis dot formulas of homonuclear diatomic molecules. 1. Hydrogen molecule, H 2 HH or HH . . FF .. . . . . . . .. .. .. FF . . . . .. .. .. .. or NN · · · · · · · · · · NN · · · · or 2. Fluorine, F 2 3. Nitrogen, N 2 6 Lewis Formulas for Molecules Hydrogen chloride, HCl 7 Lewis Formulas for Molecules Water, H 2 O 8 Lewis Formulas for Molecules z Ammonia molecule, NH 3 z Ammonium ion, NH 4 + 9 Writing Lewis Formulas: The Octet Rule z The octet rule states that representative elements usually attain stable noble gas electron configurations in most of their compounds. z Lewis dot formulas are based on the octet rule. z We need to distinguish between bonding (or shared) electrons and nonbonding (or unshared or lone pairs) of electrons. 10 Writing Lewis Formulas: The Octet Rule z N - A = S rule z N = number of electrons needed to achieve a noble gas configuration. • N usually has a value of 8 fo r representative elements. • N has a value of 2 for H atoms. z A = number of electrons available in valence shells of the atoms. • A is equal to the periodic group number for each element. • A is equal to 8 for the noble gases. z S = number of electrons shared in bonds. z A-S = number of electrons in unshared, lone pairs .

Nona
The math is good enough, but ethylene is not a diatomic gas. Nitrogen (N2) is diatomic. Nitrogen has an atomic mass of 14.007 g/mole so N2 would have a molecular mass of twice that or 28.014 g/mole.
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You might write a proposal, including your hypothesis and a brief description of your methodology, and mail or carry it to the principal at Lake Braddock along with a request for an appointment to discuss the project in more detail. Include copies, as well, for the teachers whose classes would be involved. Then bring info packets for everyone to the appointed meeting. Be prepared either to explain how your project will not unduly interfere with their work or to persuade them that the interference will be worth THEIR while in some way. Good luck! Sounds interesting.