Answer:
0.0059mol
Explanation:
From the ideal gas equation
PV=nRT
P=Pressure
V=Volume
R=Ideal gas constant
T=Temperature
n=number of mole
P=745mmHg
760mmHg=1atm
745mmHg=0.98atm
volume of water displaced=volume of hydrogen produced=145ml=0.145L
R=0.082Latm/mol/K
T=22°C=273+22=293K
no of mole=PV/RT
=0.98×0.145/0.082×293
=0.1421/24.026
=0.0059mol
1
The moles of nitrogen in 0.30 mole of caffeine is calculated as follows
write the chemical formula = C8H10N4O2
for this case from the chemical formula we have 4 atoms of nitrogen in caffeine
therefore moles of nitrogen in caffeine = 4 x0.30 =1.2 moles
Answer:
In chemistry, a single bond is a chemical bond between two atoms involving two valence electrons. That is, the atoms share one pair of electrons where the bond forms. Therefore, a single bond is a type of covalent bond.
Explanation:
(copied from Google)