When 75 ml of 0.15 - mol/L HCL is diluted with distilled water to a final volume of 150 ml, the concentration of HCL is reduced to:

i think it's letter a.

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.