1.
How many miles per hour is 30.5 m/s?

68.22656

Explanation:

I think this is the answer.

Hope it's correct!

68.22656

Explanation:

Speed

30.500001382

Meter per second

=  

68.22656

Miles per hour

Formula  

multiply the speed value by 2.237

(hope this helps can i plz have brainlist :D hehe)

answer: enthalpy

explanation:

for a exothermic reaction, the energy is released i.e. the energy of the products is lower than the energy of the reactants.

= enthaply

= energy of products

= energy of reactants

as , thus comes out to be negative. negative value of enthalpy shows that the reaction is exothermic.

can you attach the