How many significant figures are in the measurement 0.2050 meters? A. 3
B. 5
C. 2
D. 4

D.4

Explanation: Starting at the left side where the decimal is  (because you start with a non-zero integer) the 2 and 5 are obviously significant. The first 0 is significant because it is between two non-zero integers, and the second is significant because it is at the end of the number (this only counts at the end of a decimal!!).

i think its 5049.

i hope this !

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