Given that the molecular mass of iron is 56 and that of oxygen is 16, how many moles of iron3 oxide will be contained in 1kg of the compound?
the molar mass is 160
so, 1kg = 1000g = 1000/160 = 6.25 moles
Since the formula is Fe2O3, the molar mass is 2*56 : 3*16 = 112+48 = ____
so, what do you think?
Plz sir we need short tRicks for etea about limiting and excess reagent
Ah, the chemistry magician is here! Alright, let's do some mole-tastic calculations.
The molar mass of iron(III) oxide (Fe2O3) is the sum of the molar masses of two iron atoms (2 * 56) and three oxygen atoms (3 * 16). So, it comes to a total of 160 grams per mole.
Now, we need to convert grams to kilograms, because who needs that many decimal places?! There are 1000 grams in a kilogram.
1 kilogram is equal to 1000 grams, so if we divide 1000 by 160, we get the number of moles of iron(III) oxide in 1kg. It's approximately 6.25 moles.
That's enough moles to make any chemistry professor blush! Keep those moles in check, my friend!
To determine the number of moles of iron(III) oxide (Fe2O3) in 1kg of the compound, we first need to find the molecular mass of iron(III) oxide.
The molecular mass of Fe2O3 can be calculated by summing the atomic masses of its constituent elements: iron (Fe) and oxygen (O).
The molecular mass of iron (Fe) is given as 56, and the molecular mass of oxygen (O) is given as 16.
Since there are 3 oxygen atoms in one molecule of Fe2O3, we multiply the molecular mass of oxygen by 3.
So, the molecular mass of Fe2O3 can be calculated as follows:
Molecular mass of Fe2O3 = (2 × molecular mass of Fe) + (3 × molecular mass of O)
= (2 × 56) + (3 × 16)
= 112 + 48
= 160
Now we have the molecular mass of Fe2O3, which is 160.
To find the number of moles in 1kg of Fe2O3, we use the following formula:
Number of moles = Mass of substance / Molecular mass
Since the mass of the substance is given as 1kg (1000g), we convert it to grams.
1kg = 1000g
Now we can calculate the number of moles of Fe2O3:
Number of moles = Mass of substance / Molecular mass
= 1000g / 160g/mol
= 6.25 moles
Therefore, there are approximately 6.25 moles of iron(III) oxide in 1kg of the compound.