Which arrow or arrows represent reactions that demonstrate a conservation of mass and energy? Explain your answer

distance, luminosity, brightness, radius, chemical composition, and temperature

it would be b. 6co2 + 6h2o --> c6h12o6 + 6o2

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.