Question

What is the maximum number of water molecules produced if 0.34 mol of propane, C_3H_8, combusts in excess oxygen? C H (g) + 5O_2 (g) rightarrow 3CO_2 (g) + 4H_2 O(g) 2.4 Times 10^24 molecules 8.2 Times 10^23 molecules 2.1 Times 10^23 molecules 5.1 Times 10^23 molecules What is the maximum mass of NO_2 that is formed when 7.5 g of N_2O_3 are consumed? 2N_2O (g) rightarrow 4NO_2(g) + O_2 (g) 1.6 g 3.2 g 6.4 g 15 g What is the oxidation number of chlorine in NaClO_2? +5 +3 +1 -1 Which reaction will result in a precipitate? KCl (aq) + CaBr_2 (aq) rightarrow NH_4 NO_3 (aq) + HI (aq) rightarrow FeCl_2 (aq) + Na_2S (aq) rightarrow H_2 SO_4 (aq) + NaOH (aq) rightarrow

Answer 1

17. from the data given we can do the following:

$7.5gN_2O_3*\frac{1mol}{108g}*\frac{4molNO_2}{2molN_2O_3}*\frac{46gNO_2}{1molNO_2}= 6.4gNO_2$

18. We can do the following taking into account that a stable molecule has an oxidation state = 0

Na = +1

ClO2 = -1

we can gladly help you with the others but you should post them again