The number of particles (molecules, atoms, compounds, etc.) per mole of a substances is known as Avagadro number. It is equal to 6.022×10^23 mol-1 and is expressed as NA.
Number of moles is the amount of a substance that contains as many particles as there are atoms in 12 grams of pure carbon-12. So, 1 mol contains 6.022×10^23 elementary entities of the substance. Since 6.022 x 10^23 is the Avagadro number, one mole is equal to Avagadro number.
One mole of a substance is the ratio of mass of the substance by the molecular mass of the substance. Thus the mass of one mole of a substance is equal to the substance's molecular weight. Thus one mole of a substance is the atomic mass unit of a substance and since one mole is equivalent to the Avagadro number,we can conclude that one Avagadro number is one atomic mass unit of the substance.
Answer:
Mg(OH)2(s) + 2HCl(aq) → 2H2O(l) + MgCl2(aq)
Explanation:
<span>H2O is the formula for water, the subscript (s) means that the substance in question is in a solid state; H2O_(s) is the formula for water in the solid state h20_(s)</span>
Answer:
55.845 u
Explanation:
Fe, iron, has 29 neutrons and a atomic mass of 55.845 u
Answer:
The balance chemical equation of combustion of methane is:
Explanation:
[tex]CH_4 + O_2\rightarrow CO_2 + H_2O[/tex]
During balancing of the chemical reaction balance out all the elements beside oxygen. Oxygen atom should always be balanced in the end.
On reactant side :
C = 1, H = 4, O = 2
On product side :
C = 1, H = 2, O = 3
Step 1 : Write 2 in front of water.
Step 2 : Write 3 in front of oxygen.
On reactant side :
C = 1, H = 4, O = 4
On product side :
C = 1, H = 4, O = 4
Chemical equation is balanced.