Mr. Romeo wants to make a NaOH solution with a concentration of 7.8 M. If he plans to have 8.2 liters of solution, how many grams should he measure out?

you need to give more information

a corroding iron, if that's one of your choices

c. orbital shape i hope this is correct

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.