Obtain the moles of substances in the following.
a. 3.43 g of C b. 7.05 g `Br_2`
c. 76 g `C_4H_(10)` d. 35.4 g `Li_2 CO_3`
e. 2.57 g As f. 7.83 g `P_4`
`41.4 g N_2H_4` h. 153 g `Al_2(SO_4)_3`

The value of Delta H - Delta U for the following reaction at 27^(@)C will be : N_(2(g)) + 3H_(2(g)) rarr 2NH_(3(g))

At T(K), the ratio of kinetic energies of 4g of H_(2) (g) and 8g of O_(2) (g) is

Suggest a scheme of classification of the following redox reactions (a) N_(2) (g) + O_(2) (g) rarr 2 NO (g) (b) 2 Pb (NO_(3))_(2) (s) rarr 2 PbO (s) + 4 NO_(2) (g) + O_(2) (g) (c) NaH(s) + H_(2) O (l) rarr NaOH (aq) + H_(2) (g) (d) 2NO_(2) (g) + 2OH^(-) (aq) rarr NO_(2)^(-) (aq) + NO_(3)^(-) (aq) + H_(2) O (l)

If U = { a, b, c, d, e, f, g, h} , find the complements of the following sets : C = {a, c, e, g}

Which of the following holds good to the laws of thermodynamics for the reaction ? C_2H_(4(g)) + 3O_(2(g)) to 2CO_(2(g)) + 2H_2O_((l))

If U = { a, b, c, d, e, f, g, h} , find the complements of the following sets : D = { f, g, h, a}

In what manner will increase of pressure affect the following equation ? C_((s)) + H_(2)O_((g)) hArr CO_((g)) + H_(2(g))