What is the empirical formula of a compound containing 5.03 grams carbon, 0.42 grams hydrogen, and 44.5 grams chlorine? (5 points)
C2H3C1
C2H2C1
CHCIA
OCHCl3

Agas mixture with a total pressure of 745 mmhg contains each of the following gases at the indicated partial pressures: co2, 245 mmhg ; ar, 119 mmhg ; and o2, 163 mmhg . the mixture also contains helium gas. part a what is the partial pressure of the helium gas? phe p h e = nothing mmhg request answer part b what mass of helium gas is present in a 10.2-l sample of this mixture at 283 k ? m m = nothing g request answer

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

Na chemical reaction, activation energy increases the of the reactants. this outcome causes the particles to collide, which results in the of new products.