La aparición del oxígeno en la atmósfera ha sido explicada bajo la teoría de la participación de bacterias que lo liberaban junto a hidrocarburos simples, lo que se puede representar mediante la ecuación: CO2(g) + H2O(g)⇒ CH2O(g) + O2 (g) De la información que se puede obtener de esta ecuación, por cada 1 mol de H2O, ¿cuántos moles de CH2O se obtienen? * 4
3
2
1

Use the standard enthalpies of formation for the reactants and products to solve for the δhrxn for the following reaction. (the δhf of c2h4 is 52.26 kj/mol, co2 is -393.509 kj/mol, and h2o is -241.818 kj.) c2h4 (g) + 3o2(g) 2co2 (g) + 2h2o(g) δhrxn = the reaction is .

Abullet found at a crime scene may be used as evidence in a trial if the percentage of metals match to the composition of metals in a bullet from the suspect's ammunition. a forensic scientist's analysis of the bullet shows that it contains 11.9 g of lead, 0.5 g of tin, and 0.8 b of antimony. what is the percentage of lead metal in the bullet? express your answers to the one's place.

Identify the electromagnets with poles that are reversed from the electromagnet shown above