sodium hydroxide (naoh) and elemental sodium (na)

acetic acid (ch3co2h) and hydrochloric acid (hcl)

acetic acid (ch3co2h) and ammonia (nh3)

ammonia (nh3) and ammonium chloride (nh4cl)

How many grams of oxygen gas are contained in a 15 l sample at 1.02 atm and 28°c? show your work.

Which of the following is not an assumption that scientists must make about the natural world? a. regularity b. causality c. predictability d. plausibility

Two solids are mixed in a flask and stirred. after a few minutes, the flask becomes cold. which of the following best describes this reaction? a. an exothermic reaction b. a combustion reaction c. an endothermic reaction d. a decomposition reaction