The formula of Iron(III) oxide is Fe2O3
In order to calculate the mass of iron in a given sample of iron(III) oxide, we must first know the mass percentage of iron in iron(III) oxide. This is calculated by:
[mass of iron in one mole of iron(III) oxide/ mass of one mole of iron(III) oxide] * 100
= [(moles of iron * Mr of iron) / (moles of Iron * Mr of Iron + moles of Oxygen * Mr of Oxygen)] * 100
= [(2 * 56) / (2 * 56 + 3 * 16)] * 100
= (112 / 160) * 100
= 70%
Thus, in a 100g sample, the weight of iron will be:
100 * 70%
= 70 grams
Answer:
n=N/NA
n= 3.754×10²³/6.02×10²³
n= 6.24 s
Explanation
since there is number of molecules, make use of Avogadro's constant to get number of moles.
The order of increasing C-OC−O bond length is:
a < c < b < e < d
a < c < b < e < d
Therefore, the order of increasing bond strength is:
d < e < b < c < a
d< e < b < c < a
<h3>What is bond length?</h3>
The distance between the centers of two atoms that are covalently connected is known as the bond length. The number of bound electrons determines the bond's length (the bond order). The greater the attraction between the two atoms and the shorter the bond length are, the higher the bond order.
The average distance between the nuclei of two bound atoms in a molecule is referred to as bond length or bond distance in molecular geometry. It is a transferrable characteristic of a bond between atoms of fixed kinds that is comparatively independent from the other components of the molecule.
Bond length and bond order are related; the shorter the bond is when more electrons are involved in its production.
To learn more about bond length from the given link:
brainly.com/question/28225709
#SPJ4
Explanation:
it might not be completely right
Granite forms when
magma cools slowly underground. Granite is an intrusive igneous rock.
The answer is letter B. granite is composed mostly of quartz and feldspar with
minor amounts of mica, amphiboles and other minerals.
