CaO(s) + H2O(l) → Ca(OH)2(s): ΔH = −65.2 kJ Which statement about the reaction between calcium oxide and water is correct?

65.2 kJ of heat are released for every mole of CaO that reacts.
130 kJ of heat are released for every mole of H2O that reacts.
130 kJ of heat are absorbed for every mole of CaO that reacts.
65.2 kJ of heat are absorbed for every mole of H2O that reacts.

nuclear fission produces elements that are heavier than helium.

the elements that are used in nuclear fission and their products are much heavier than helium.

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.