10) Which gas sample at STP has the same number of molecules as a 2.0 Liter sample of Cl2 (g) at STP?
a) 1.0 L of H2 (g) b) 2.0 L of He
c) 3.0 L of NH3 d) 4.0 L of O2 (g)
11) 0.500 atm of NH3 gas is placed in a 12.0 L rigid container which was measured
at standard temperature.
a) Determine the mass of NH3 gas in this container in grams.

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

Which of the following is a compound? a.carbon b.oxygen c.hydrogen d.water

An atom of lithium (li) and an atom of chlorine (cl) engage in a chemical reaction. which correctly describes the structure of the resulting chemical compound? hint: consider the class of each element. the chemical compound will have a network structure. the chemical compound will have triple bonds. the chemical compound will have a ball-and-stick structure. the chemical compound will have double bonds.