Plz hurry it's urgent! which describes a process where a precipitate is formed? a. a solution of agno3 is added to a solution of cacl2 to produce solid agcl and a solution of cano3. b. propane gas combusts to form co2 and h2o. c. a solution of hcl mixes with a solution of ca(oh)2 to produce h2o and cacl2. d. a solution of h2so4 mixes with a solution of naoh to produce water and na2so4.

How many major plates cover the earth

Which of the following statements is most likely correct about a rock belonging to the jurassic age and a rock belonging to the cambrian age? options: 1) they have identical fossils of organisms that have evolved over time. 2) both have animal fossils preserved in them due to weathering and erosion. 3) they contain different fossils because life on earth has changed through time. 4) the fossils in them were formed on the surface of earth due to exposure to sunlight.

Membrane vesicles containing an internal sodium chloride (nacl) concentration of 0.14 m are placed into separate beakers each containing a different solution. the first beaker contains 0.14 m sucrose, while the second beaker contains 0.14 m calcium chloride (cacl2). the temperature is 25°c. what is the solute potential inside the vesicles, expressed in units of mpa?