(02.04 MC) Gina predicts that one really large cube of sugar will dissolve faster than the same amount of sugar in several medium sized cubes. She thinks that bec
only one larger cube, it has more surface area and will dissolve faster than the several medium-sized cubes. What is the best assessment of Gina's prec
points)
Gina is correct since there is only one cube, it has more surface area and will dissolve faster than the medium sized cubes.
Gina la correct it takes less time for one larger object to dissolve than many objects, and larger objects have a gher temperature than smaller objects,
Gina is incorrect it will take the same time for the large and medium stred sugarcubes to dissolve. Temperature and stirring attest dissolving rates,
Gina is incorrect. The larger sugar cube will dissolve slower because it has less surface area and the water cannot easily get inside of the cube to dissolve it.
Question 3

Problem page gaseous ethane reacts with gaseous oxygen gas to produce gaseous carbon dioxide and gaseous water . if of water is produced from the reaction of of ethane and of oxygen gas, calculate the percent yield of water. be sure your answer has the correct number of significant digits in it.

The earth's moon is unusually large. two popular theories of the moon's origin include the "sister world" hypothesis, which states that the moon formed from the same materials as the earth, near enough to the earth that they fell into orbit around each other. a second theory is the "capture" hypothesis, in which the moon formed elsewhere in the solar system, and the earth's gravity pulled it into its orbit. studies of what the moon is made of indicate that some of its materials had to come from the earth or from the same area of the solar system where the earth had formed. at the same time, the moon does not contain much of the material that makes up the earth's core, so the moon could not have formed from the same materials as the earth. how do the two facts above affect the described theories of the moon's origin? a. they show that scientists will never agree on where the moon came from. b. they show that more experiments on moon formation need to be done. c. they show that no theory accounts for the existence of the moon. d. they show that neither theory is complete and entirely correct.

What is the result of multiplying (2.5 × 1010) × (2.0 × 10-7)? a. 5.0 × 103 b. 5.0 × 10-3 c. 5.0 × 1017 d. 5.0 × 10-17