Which of the following is a quantitative observation? select one: a) all of the listed answers are correct b) none of the listed answers are correct c) carbon dioxide was produced. e) the liquid looked yellow. d) the object had a mass of 2.3 grams. f) a yellow solid formed.

Complete each row of the table below by filling in the missing prefix or missing exponent.

The volume of an unknown substance in a sealed glass jar is 50 milliliters. the volume of the jar is 200 milliliters. which state of matter could the substance be?

Astudent pours 10.0 g of salt into a container of water and observes the amount of time it takes for the salt to dissolve. she then repeats the process using the same amounts of salt and water but this time she slowly stirs the mixture while it is dissolving. the student performs the experiment one more time but this time she stirs the mixture rapidly. the dependent variable in this experiment is: time for salt to dissolve speed of stirring amount of water mass of salt