when holly injures her shoulder she uses an ice pack. she activates the ice pack releasing the urea. what process does she observe as she uses the cold pack?

Methyl salicylate, C8H8O3, the odorous constituent of oil of wintergreen, has a vapour pressure of 1.00 torr at 54.3oC and 10.0 torr at 95.3oC. a. What is its vapour pressure at 25oC? b.

Describe the displacement method for measuring the volume of an object

Which equation represents a change that results in an increase in disorder? (1) I2 (s) = >I2 (g) (2) CO2 (g) = >CO2 (s) (3) 2Na (s) + Cl2 (g) = >2NaCl (s) (4) 2H2 (g) + O2 (g) = > 2H2O (l)

A pet owner dropped some new fish into a pond. Several species of fish lived in the pond, but within a few months, only members of the new species survived. What best explains why this happened?

how would you write the electron configuration of the outermost principal energy level of a group 16 elements in the ground state.

Which of the following equilibria would be impacted by a change in pressure? Select the correct answer below: H2 (g) + I2 (g) →2HI (g) NO (g) + O3 (g) →NO2 (g) + O2 (g) 2SO3 (g) →2SO2 (g) + O2 (g) CO (g) + H2O (g) →CO2 (g) + H2

A common stain remover is sold in concentrated form as 3M sodium hypochlorite (NaOCl). You need to create 400 milliliters of a 0.5M solution of sodium hypochlorite to fill a spray bottle. What volume of 3M sodium hypochlorite is needed? 15.0 mL 66.

A chemical reaction that takes in heat is called: exothermic endothermic a phase change

Which of the following lines (of latitude or longitude) would represent by 180 longitude? South Pole Equator Prime meridian North Pole International date line

63Ni decays by a first-order process via the emission of a beta particle. The 63Ni isotope has a half-life of 100. years. How long will it take for 65% of the nickel to undergo decay?