B. 0.265 atm D. 3.77 atm C. 1.36 atm S. A mixture of gases consists of helium at

Question

B. 0.265 atm D. 3.77 atm C. 1.36 atm S. A mixture of gases consists of helium at a partial pressure of 400. torr, neon at a partial pressure of 300. torr, and argon at a partial pressure of 200. torr. What is the total pressure of this mixture of gases? A. 300. torr C. 900. torr B. 760. torr D. 1000 torr 6. The element found in Period 5 and Group IB (Grp.11) in the periodic Table is A. gold C. silver B. nickel D. antimony 7. Arrhenius defined an acid as a substance whose a B. hydroxide ion. D. hydrogen ion queou s solution contains an excess of A. sodium ion. C. chloride ion. 8. Which are the two Bronsted-Lowry acids in the following equation? A. HS-and H2O C. H2S and H3O B. H2S and HS D. H3O and H2O 9. At which pressure would a 2.60 mole sample of gas at 20.0 C have a volume of 25.0 L2 (R-0.0821 L atm/(mol K) A. 0.171 atm C. 2.08 atm B. 15.8 atm D. 2.50 atm

Explanation / Answer

PHe   = 400 torr
PNe   = 300 torr
PAr = 200 torr
Total pressure of mixture (P) = PHe + PNe + PAr
                               = 400 + 300+200 = 900 torr
C. 900 torr >>>>answer
6. 5Th period and IB group element is silver
C. silver >>>>answer
7.A substance which gives H^+ ion in aqueous solution is called Arrhenous acid.
    HCl(aq) ---------> H^+ (aq) + Cl^- (aq)
D. hydrogen ion>>>>>answer
8. H2S   + H2O ---------> HS^-    +         H3O^+
    acid    base           conjugate base    conjugate acid
C. H2S and H3O^+ >>>>answer
9. n = 2.6 mole
   T = 20+273 = 293K
   V = 25L
PV = nRT
P   = nRT/V
      = 2.6*0.0821*293/25   = 2.5atm
D. 2.5 atm >>>>answer

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