How many grams of methane gas (ch4) need to be combusted to produce 11.8 l water vapor at 1.85 atm and 304 k? show all of the work used to solve this problem.
ch4 (g) + 2o2 (g)yields co2 (g) + 2h2o (g)
use pv=nrt
r = 0.0821 l atm/mol k

At stp, which substance is the best conductor of electricity? a. nitrogen b. neon c. sulfur d. silver

Select the correct value for the indicated bond angle in each of the compounds. o−o−oo−o−o angle of o3 90° 109.5° < 109.5° 120° < 120° 180° f−b−ff−b−f angle of bf3 180° < 109.5° < 120° 120° 109.5° 90° f−o−ff−o−f angle of of2 < 120° 120° 90° 109.5° 180° < 109.5° cl−be−clcl−be−cl angle of becl2 90° 109.5° 180° 120° < 109.5° < 120° f−p−ff−p−f angle of pf3 90° 109.5° < 109.5° 180° 120° < 120° h−c−hh−c−h angle of ch4 90° < 109.5° 180° 120° < 120° 109.5°

Is it safe to take 450mg of diphenhydramine hydrochloride?