Answer:
818.6 KJ/mol
Explanation:
2Al(s) + 3H2O(l) → Al2O3(s) + 3H2(g)
∆H=∆Hp-∆Hr
∆H=(1(∆HAl2O3)+3(∆HH2))-(2(∆HAl)+3(∆HH2O))
∆H=((-1676.0 KJ/mol)+3(0 KJ/mol))-(2(0 KJ/mol)+3(-285.8 KJ/mol))
∆H=-818.6 KJ/mol
ANSWER: B) drying paint
EXPLANATION: Car manufacturers use UV radiation to dry the paint o the vehicle. The high reflectivity of infrared radiation helps to keep the car interior cool. It also gives advantages over convection heating. It can provide both high intensity and low intensity heat and is a low cost heat source when compared in dollars per unit of energy consumed. The IR heating also doesn't penetrate deeply and apply heating only on the outer surface.
A vertebrate, such as a lizard, that has dry scaly skin and lays eggs that have a leathery shell so your answer will be A. reptile
Answer:n = PV/RT = 0.923 atm x 0.250 L / (0.082057 x 290.75 K)
. n = 0.00967. mole 0.00967 mole x 6.22x10^23 molecules/mole = 6.02x10^21 molecules of gas
Explanation:
<span>Hybridization is the chemist's attempt to explain the observed molecular shape by constructing HAOs with the appropriate inter orbital angels.
A molecule adopts its most stable shape all by itself ,then the chemist calculated what HAOs correspond to the shape.There is a One-to One correspondence between shape and hybridization.</span>