No of molecule in 49g of h2so4

3.011 x 10^23 molecules

Explanation:

Molecular mass of H2SO4 = (Atomic mass of H) x 2 + (Atomic mass of S) x 1 + (Atomic mass of O) x 4

                                            = ( 1 x 2) + (32 x 1) + (16 x 4)

                                             = 2 + 32 + 64

                                            = 98.

Now,

Number of moles in the given H2SO4(n)  = Mass of H2SO4 in grams/Molecular mass of H2SO4

                                         = 49/98

                                          = 1/2

                                          = 0.5

                                     : n = 0.5 mol

                                    = 3.011 x 10^23 molecules .

that is 49 g of H2SO4 contains 3.011 x 10^23 molecules of H2SO4.

explanation:

earth's surface is mainly heated by the absorption of infrared radiation from the sun.

evaporation occurs because molecules in liquid water are warmed ( usually by the sun) and vibrate quicker, becoming less dense and rise.

condensation occurs because molecules in water vapor are cooled and therefore vibrate more slowly thus becoming more dense and eventually fall to earth.

lines of equal barometric pressure on a weather map are called: isobars : lines of equal temp on a weather map are called: isotherms.​