Chemistry Please Help 1. 2 As (s) + 6 NaOH (aq) → 2 Na3AsO3 (s) + 3 H2 (g)

If 26.2g of As reacts with excess NaOH at STP, what volume of H2 will be produced in liters?

2. SnO2 (s) + 2 H2 (g) → Sn (s) + 2 H2O (l)

What mass of water is produced when 49.4g of SnO2 is consumed in the reaction above?

3. C3H8(g) + 5 O2 (g) → 3 CO2 (g)+ 4 H2O (g)

What volume of oxygen is required to completely combust 0.531L of propane (C3H8) at STP?

може ли да зареждате повече информация, моля

answer : (a) volume of the gas = 8.67 ×   l

                (b) second virial coefficient b = -1.21226 l/mole

solution :   given,     t = 300k

                                p = 20atm

                                z = 0.86

                                n = 8.2 mmoles = 8.2 × moles

                                r =   0.082 l atm/k/mol

        find,     (a) volume of gas   and (b) second virial coefficient b at 300k.

formula used :            

                          and            

(a)            

                    = \times 0.082\times 300}{20}[/tex]

                    = 8.67 ×   l

(b)      

                    = (0.00867-1) × 8.659

                    = - 8.5839 l/mole