Write the henderson-hasselbalch equation for a solution of propanoic acid (ch3ch2co2h, pka = 4.874 ) using ha, a–, and the given pka value in the expression.

The henderson hasselbalch equation is given by: pH=pKa+log[A−][HA] where [A−] is the molar concentration of a conjugate base. and [HA] = molar concentration of some weak acid. Now, you can start off by writing a chemical equation of propanoic acid and dissociation of it's hydrogen. Can you try it now?

weight of any object is given by

w = m*g

where m is mass of the object and g is the acceleration due to gravity.

for earth the value of g is 9.8 m/s^2 so

w=117.6 n m=12 g=?

117.6=12g => g=9.8 m/s^2

which is the force of gravity on earth.