Saying that you have 2.0 moles of He is like saying that you have 2 dozen of something. We all know a dozen to be equal to 12, and in this case, the "dozen" is Avogadro's number (6.022*1023). If you multiply 2 dozen by 12, you'll have the number of whatever you're counting (24), and if you multiply 2.0 moles of He by Avogadro's number, you'll have the number of He atoms you're talking about.
Helium (He) is a noble gas and exists as a monatomic element.
Atomic Mass of He = 4.0
Amount of He = 16/4.0 = 4.0mol
There are 4 moles of helium in a 16g sample.
In one mole of any substance, there are 6.02 x 1023 constituent particles, correct to three significant figures. This is the Avogadro constant. Thus for two moles of He, there are 1.20 x 1024 atoms. (Note that He is a monatomic gas and exists as a single atom.)
M = 4 g/mol
n = 2 g * (1 mol /4 g) = 0.5 mol
Molar mass of helium is 4gmol-1. so there are 0.6 moles of He.
1 mole of water is 18g. 36g of water is thereforeequivalent to 2 moles. 2 moles of water contains 4 moles of hydrogen and 2 moles of oxygen and so there are6 moles of atoms in 2 moles of water. 6 moles of atoms x (3.6x10^24) = 36.1x10^24 atoms
0,39 moles of gallium contain 2,34863493423.10e23 atoms.
14.0 g x 1 mole/187.56 g = 0.0746 moles0.0746 moles Cu(NO3)2 x 6 moles O/mole Cu(NO3)2 = 0.448 moles O atoms0.448 moles O atoms x 6.02x10^23 atoms/mole = 2.70x10^23 atoms of oxygen
1 molecule of hydrogen contains 2 hydrogen atoms,so 1 mole of hydrogen consists of 2 moles of atoms.
The number of chlorine atoms in 2,00 moles of CCl4 is 48,113.10e23.
44 moles of atoms
2 moles of benzene gives 12 moles of hydrogen atoms since benzene is C6H6
1 mole of water is 18g. 36g of water is thereforeequivalent to 2 moles. 2 moles of water contains 4 moles of hydrogen and 2 moles of oxygen and so there are6 moles of atoms in 2 moles of water. 6 moles of atoms x (3.6x10^24) = 36.1x10^24 atoms
Two moles of neon contain 12,044281714.10e23 atoms.
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1. Three moles of sodium contain 18,06642387.1023 atoms. 2. The mass of three moles of sodium is 68,97 grams.
1,638 moles contain 9,864266723766.10e23 atoms.
1 mole of CO2 has 1 mole of carbon atoms and 2 moles of oxygen atoms. So, 0.000831 mole of CO2 will have 0.000831 mole of carbon atoms.
There are 24 moles of Carbon (C) in 2 moles of table sugar (sucrose)
A very small amount. A mole contains 6.023X1023 atoms. 2 billion atoms, i.e 2 X 109 atoms is just (2 X109 )/(6.023X1023) =3.33 X 10-15 moles!
1. Three moles of sodium contain 18,06642387.1023 atoms. 2. The mass of three moles of sodium is 68,97 grams.