13 g of aluminum reacts with 294 g of sulfuric acid (H2SO4) to form 205g of aluminum sulfate and some hydrogen. How many grams of hydrogen are produced in the reaction?  A. 2
B. 3
C. 89
D. 102
D. 307

the correct answer would be b. amelia, because the particals of gas move really fast (charged particals) and gas also has a lot of room (particals move independently) so the only answer that has both of those is amelia's.

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.