5. Calcula el número de protones, neutrones y electrones que tienen los siguientes átomos:
 O ( Z=8, A=16)
 Cl ( Z= 17 , A= 37 )
 Al ( Z= 13 , A= 27 )
 Na (Z=11, A=23)

Hydrogenation reactions, in which h2 and an "unsaturated" organic compound combine, are used in the food, fuel, and polymer industries. in the simplest case, ethene (c2h4) and h2 form ethane (c2h6). if 140 kj is given off per mole of c2h4 reacting, how much heat (in mj) is released when 12 kg of c2h6 forms?

The plant food contains nh4)3po4 what tests would you run to verify the presence of the nh4 ion and the po4 ion

Abaker touches a pie right after taking it out of the oven. which statement best explains why the pie feels hot?