At 9: 00 a. m. monday morning, thomas fills a beaker with water and places it in the corner of the classroom. at 1: 00 p. m. on tuesday, thomas examines the beaker and notices that the water level is 42 milliliters. at 11: 00 a. m. on wednesday, the water level has dropped to 31 milliliters. if the evaporation of the water follows a linear function, at what time will the beaker be empty? .

Answer is: will the beaker be empty Saturday 1:00 am.

l₁ = 42 mL; water level at Tuesday.

l₂ = 31 mL; water level at Wednesday.

Δl = l₁ - l₂.

Δl = 42 mL - 31 mL.

Δl = 11 mL; difference between water levels.

Δt = 22 h; difference in time.

rate of evaporation = Δl ÷ Δt.

rate of evaporation = 11 mL ÷ 22 h.

rate of evaporation = 0.5 mL/h.

t = 31 mL ÷ 0.5 mL/h.

t = 62 h; time needed for empty the beaker.

the number of valence electrons for each molecule or ion is shown beneath the structure. remember hydrogen will not have more than two electrons. this hydrogen is part of a covalent bond (sharing two electrons). a double bond here would cause hydrogen to share four electrons with phosphorus.