10
substance characteristics
the substance was heated and then placed in an ice bath.
the substance was in a salt solution of 2m and later placed in a
solution of 4m to cause a reaction.
the substance was hammered and broken into pieces.
which statement explains the treatments?
3
substance 1 was activated by a decrease in temperature, substance 2 was activated by the change in concentration, and
substance 3 decreased the surface area.
substance 1 was activated by a decrease in temperature, substance 2 was activated by the change in pressure, and
substance 3 increased the surface area.
substance 1 was activated by the heat and inactivated by ice, substance 2 was activated by the change in pressure, and
substance 3 decreased the surface area.
substance 1 was activated by the heat and inactivated by ice, substance 2 was activated by the change in concentration,
and substance 3 increased the surface area.

the ozone layer acts as a filter for the shorter wavelength and highly hazardous ultraviolet radiation (uvr) from the sun, protecting life on earth from its potentially harmful effects. when the sky is clear, there is an inverse relationship between stratospheric ozone and solar uvr measured at the earth's surface.

i just calculated it all out, and not including weekends, and all the different days off. as of this school year (2018-2019) students are spending 2198 hours in school this year

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