Sulfur trioxide (SO3) can be produced using the reversible reaction shown. Which change would keep this reaction from shifting to form more of the
product?
2802 + 02 22803 + energy
A. Decreasing the temperature in the reaction vessel
B. Removing the product from the reaction vessel as it forms
C. Increasing the pressure in the reaction vessel
D. Decreasing the pressure in the reaction vessel

law of conservation of matter

your answer is a. the enthalpy of formation for a pure element in its standard state is always positive.

i think it's c. if you look search electronic symbol on google and then click on wiki it shows you 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.