A 10kg mass is lifted to a height of 2m. What is it’s potential energy at this position

196J

Explanation:

From the question given, the following were obtained:

m = 10kg

h = 2m

g = 9.8m/s2

P.E = mgh

P.E = 10 x 9.8 x 2

P.E = 196J

answer:

the reaction is type of combination reaction.

explanation:

on the product side, there are 2 molecules of bonded to fe   which means one atom of fe are combined two molecules of . so, balanced chemical equation becomes :

this reaction follows the reaction type of combination reaction. a combination reaction is defined as chemical reaction in which reactants combines together to form a single product.

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