please give me specific Formula and Calculation formula thanks

here is question and some important information here

You place a thermometer in a beaker of Dl water and obtain the following result. What is the density of the solution (Appendix D)? Report your answer with four places after the decimal. 27 26 25 24 23 22 21 20 19 18 17 16 15 14 E (V) Zinc Tin Lead Nickel Iron Most reactive Copper Cobalt Gold Aluminum Silver Metal THE ACTIVITY SERIES PROPERTIES OF METALS Bluish white Silver white Silver bluish white Silver metallic Grayish metallic Red orange metallic Bluish gray metallic Yellow metallic Silvery gray metallic White metallic Half-Reaction Lit + e Li -3.040 K+ eK -2.931 Ca2+ + 2e Ca -2.868 Na+ + Na -2.714 Mg2+ + 2e Mg 2.372 Al3+ + 3e Al -1.662 Mn2+ + 2e Mn -1.185 Zn2+ + 2e Zn -0.7618 Cr3+ + 3e Cr -0.74 Fe2+ + 2e Fe -0.447 Co2+ + 2e Co -0.277 Ni2+ + 2e Ni -0.257 Sn2+ + 2e Sn -0.1375 Pb2+ + 2e Pb -0.1262 Color 419 232 327 1453 1535 1083 1495 1064 660 196 Point (C) Melting 7.14 7.26 11.34 8.91 7.87 8.96 8.90 cm 19.30 2.70 10.49 Density 0.389 0.218 0.130 0.443 0.412 0.385 0.431 0.129 0.899 0.240 Capacity (c) Specific Heat 2H+ + 2e H2 0.000 Cu2+ + 2e Cu +0.342 Cu + Cu +0.521 Fe3+ + e + Fe2+ +0.771 () 1.15 0.67 0.35 0.64 0.80 3.98 1.00 3.18 2.37 4.27 cm-K Watts Thermal Conductivity > Least reactive 0.7996 Ag +e Ag Hg2+ + 2e Au 0.908 Aut + e + Au 1.69