Select the correct answer.
In a given chemical reaction, the energy of the products is less than the energy of the reactants. Which statement is true
reaction?
A Energy is absorbed in the reaction.
B. Energy is released in the reaction.
C There is no transfer of energy in the reaction.
D. Energy is lost in the reaction.

step-by-step explanation:

answer: 12   they all have at least 28 days

step-by-step explanation: haha

answer: cos [   arcsin (3/5) - arccos (1/2) ] =

step-by-step explanation: × = 3/5 = 0.6--> x = 36.87 and x = 180 - 36.87 = 143.13 deg

cos y = 1/2 --> y = +- 60 deg a. cos (x - y) = cos (143.13 - 60) = cos 83,13  

=

0.12

b. cos (36.87 - 60) = cos (-23.23) = 0.92