Question

8. Which of the following reactants, when mixed, would evolve a gas. a) Li2S(aq) + 2HCl(aq) → b) Na2SO3(aq) + HNO3(aq) → c) K2CO3(aq) + 2HCl(aq) → d) All of the above. e) Only b and c. 9. Which of the following samples has the fewest moles of gas? a) 1.00 L of CH4 at 10°C and 1.00 atm b) 1.00 L of NH3 at 10°C and 1.00 atm 1.00 L of HCl at 20°C and 1.00 atm a) 1.00 L of H2 at 0.0°C and 1.20 atm 1.00 L of Ar at -10.0°C and 1.00 atm 10. Which of the following chemical reactions is an oxidation-reduction reaction? a) Mg(s) + CO2(g) → MgO(s) + CO(g) b) H2SO4(aq) + Ba(OH)2(aq) → BaSO4(s) + 2H2O(1) (2) Pb(NO3)2(aq) + 2HCl(aq) → PbCl2(s) + 2HNO3(aq) d) CO2(aq) + H2O(l) → H2CO3(aq) e) NH3(g) + HCl(g) + NH4Cl(s)

Answer 1

8. Which of the following reactions, when mixed, would evolve agas. & tis (ar) +21+4 (aa) Li2cl2 + H₂ST (2) b) Nagsoz (ca) + HNO3 caa) 2NagNO3 to H2soz (aa) c) K, CO3(aq) + 2H46) 2XU + H2CO3 (aar) d) All of the above e) mly b and e, 9. Which of the following sampres has the fewer mures of qan. U a 1.oot of cha at 10°c and 1.00 am b) 1.ool of Nita at soc and 1.00am. ☆ 1.00L of Hel at 20°c and 1.00 am f) 1.00L of Hq at 0.0°c and 1.20 alm. e) diool of Ar at -10.0° ona sam, we know, pv=nRT pv RT The more number is fewers in case d- pv - 1 X 5.00 01082 X 293 As, Temperatures nignen- and 0.0416 more. pr=1,

10. Which of the following chemical reactions is an oxidatico -reduetion reaction? + 4 Reduction. so mq (5) + 02 (2) > măão (59) + 6(9) oxidation 5) H2SO4(206) + Ba (1914), (29) - Bason (9) + 2142009) ) Pb(NO3), (29) + 2H4 (49) pb42c9+2 HNO3(aq) d) CO2 (aq) + H20 (2) — H2(03(aq) e) NH3 (2) + Ha (9) Nitqu (s)