nacl, molecules are ionic bonding this is covalent
clockwise from the carbon connected to three h atoms:c: sp³n: sp³c: sp³c: sp²n: sp².explanation
start by finding the number of electron domains on each c and n atom. why the number of electron domains? the number of electron domains of an atom indicates it hybridization. for atoms in period two (which includes both c and n):an atom with four electron domains is sp³ hybridized.an atom with three electron domains is sp² hybridized.an atom with two electron domains is sp hybridized.
how many electron domains on each of the atoms?
for each atom:each atom that the atom in question is connected to (via covalent bonds, for sure) counts towards one electron domain. this rule shall hold for bonds of all orders. (i.e., no matter if the the two atoms are connected via a single bond, a double bond, or a triple bond.) in other words, each c-c or c-n single bond counts towards one electron domain. each c=n double bond also counts towards one electron domain.each lone pair on the atom in question counts towards one electron domain. keep in mind that there are two electrons in one lone pair. (hence the name "pair".)
for example:the carbon atom at the bottom of the graph is connected to four other atoms- three hs and one n. there's no lone pair on that atom. that c atom contains four electron domains, which implies that the atom is sp³ hybridized.the nitrogen atom near the right end of the molecule is connected to two other atoms- one c and one h. there's one lone pair on that molecule. 2 + 1 = 3. that n atom contains three electron domains, which implies that the atom is sp² hybridized.
try to figure out the number of electron domains on the rest of the atoms. then determine their hybridization. in conclusion, clockwise from the carbon connected to three h atoms:c: sp³n: sp³c: sp³c: sp²n: sp².
answer : the number of moles of is, 4.225 moles
solution : given,
moles of fe = 6 moles
moles of = 8.45 moles
the given balanced chemical reaction is,
by stoichiometry, we conclude that
1 mole of fe reacts with 2 moles of
so, 6 moles of fe will react with = of
from this we conclude that is considered as a limiting reagent and fe is the excess reagent.
by stoichiometry of the given reaction :
2 moles of produces 1 mole of
so, 8.45 moles of will produce = of
therefore, the number of moles of is, 4.225 moles
answer: the atomic mass of the second isotope of boron (b) is 11.01 amu.
explanation:the average atomic mass is can be calculated by the summation of the product of the atomic mass of each isotope multiplied by its abundance (abundance % / 100.0).boron has two isotopes:
1) at.mass = 10.012938 amu ≅ 10.013 amu and its abundance = 0.198
2) at.mass = amu and its abundance = 0.802
average atomic mass of boron = 10.81 amu.the average atomic mass of boron = (10.013 amu)*(0.198) + (atomic mass of the second isotope amu)*(0.802) = 10.81 amu10.81 = 1.9825 + (0.802 x atomic mass of the second isotope)(0.802 x atomic mass of the second isotope) = 10.81 - 1.9825 = 8.8275.atomic mass of the second isotope = 8.8275 / 0.802 = 11.0068 ≅ 11.01 amu.