The mass of a certain man is 250g.. I. What is the weight of the man on earth

ii. What is the weight of the man on the moon

answer: the enthalpy of the overall chemical reaction is +87.88 kj or +88 kj.

according to hess's law, the overall enthalpy of a reaction is the difference between the sum of enthalpy values of all the products and the sum of enthalpy values of all the reactants.

δh(reaction) = ∑nδh(products) - ∑nδh(reactants)

δh(reaction) = [δh +δh] - [δh]

δh(reaction) = [1(-287.02) + 1(0) ] - [1(-374.9)] kj = +87.88 kj

here, δh (pcl3) = -287.02 kj, δh(cl2) = 0, δh(pcl5) = -374.9 kj

therefore, enthalpy of the overall reaction is +87.88 kj or +88 kj.

i dont know

explanation:

answer:

technetium is the most reactive. this is followed by silver. the least reactive out of these three elements is strontium.

metric time was an attempt to create a standard unit of time based off of 10, but it never took off an is not included in the metric system (si)