The molarity of the Ca(OH)2 solution is calculated as follows
find the concentration of HCl used from the Ph
that is PH = - log H+= 1.3
H+ = 10^-1.3 = 0.05 M
the moles of HCl = molarity x volume/1000
= 0.05 x 300/1000=0.015 moles
write the reaction equation
that is Ca(OH)2 +2HCl=CaCl2 + 2H20
by use of reacting ratio between Ca(OH)2 to HCl (1:2) the moles of Ca(OH)2 is = 0.015 x1/2=7.5 x10^-3 moles
molarity is therefore = moles /volume in liters
= {( 7.5x10^-3) /50} x1000 = 0.15 M ( answer 5)
Answer:
Al3+<Mg2+<Na+
Explanation:
this is because of nuclear charge (no. of protons)
atomic radius is inversely proportional to nuclear charge.
Cells have lots of things to do. Some cells make the whole organism, so that one cell must do everything that organism needs to do to live. Other cells perform specific functions, so they must be designed to do that specific activity.
There you go :) just reword it and try make it into your own words like just switch some sentences around
Probably NO2 because it includes Oxygen in the equation.