Question

6. Commercial drain cleaners sometimes contain a mixture of aluminum powder and NaOH. When the mix is poured down a clogged drain, the following occurs: 2NaAl(OH)4(aq) + 3H2(g) + Heat 2 NaOH(aq) + 2AI(s) + 6H2O() Heat melts grease and gas breaks up the clogs. What volume of hydrogen is formed at 1.00 atm and 21.0°C when 5.00 g of Al are treated with excess NaOH? 7. The mass percent of HCO3 in a certain 3.20 g Alka Seltzer tablet is 32.5%. How many mL of carbon dioxide will be generated when the Alka Seltzer reacts with the HCI in a person's stomach at a pressure 780 torr and a temperature 37.0°C? HCO3HCI(aq) Cl(aq) + H20() CO2(g) o00: 8. What mass of NaN3 is needed to inflate an 18.0 L air bag in an automobile at 25.0°C and 1.00 atm according to the following reaction? 6NAN3(s)FezO3(s) 3Na2O(s) 2Fe(s) 9N2(g) cobo of bs hoyw atos ealsm ot babsen O muieato 0H (payoHa exO5x

Answer 1

5.00 moles of Al O.185 Mo 2 moles of AI ive 3 mol Ho o. 15 mol of A1 Ves 3 D.185 -0.278 hel H Using MRT Va P 0.278x0.092ix 294 6.70/L man o HCo 3.20x 32.5 1.04 MDlcu of HCo (e) - 61 e. o/ Mol moles of Co PMedvced (m) | 0·५२३ | ४ 0.017x0.0821 x 31 DY760 MRT V- 280 Nces 0.422 L 1.Dy18 PV mole Cn) of RT D'U821x 298 So, mole of NaN Tequnel D.2360. Upo mo) Na N3 31.88 / o.49x65 man ot NAN3