A.) half - life of a radioactive substance is defined as the time during which concentration of the substance becomes half the initial value.
N(C)=5,02·10²² atoms
calculation check:
N(C)=(1/12)*6.022*10²³=0.5018*10²³≈5.02·10²²
napthalene: C10H8 sulphur: S02
Explanation:
C10H8
<span>136.14 g/mol </span><span><span>Calcium sulfate, Molar mass</span></span>
Pressure given by:
Pressure=(force)/(area)
Force=Mass*gravitational pull
Mass=34Kg
gravity=9.80
so,
force=34*9.8=333.2
thus;
pressure=333.2/25=13.328=13.3 N/cm^2
Hope this helped :)
