Una sustancia A se mezcla en cantidades iguales con otra sustancia B. Admitiendo que al cabo de 1000 segundos la mitad de A haya reaccionado y que luego de 2000 segundos sólo queda 0,25 de la cantidad inicial, determine si el proceso pertenece a una reacción de primer orden calculando su k.

What element is in the lathanide family?

If a 12-v battery is connected to a circuit that has a current of 3.0 a, what is the total resistance in the circuit? 36 ohms 4 ohms 0.25 ohms

Ammonium perchlorate nh4clo4 is the solid rocket fuel used by the u.s. space shuttle. it reacts with itself to produce nitrogen gas n2 , chlorine gas cl2 , oxygen gas o2 , water h2o , and a great deal of energy. what mass of nitrogen gas is produced by the reaction of 2.1g of ammonium perchlorate?