Sally's teacher tells her to find the masses of a sugar cube and a glass of water. sally finds the masses to be 10 g for the sugar cube and 100 g for the glass of water. then, the teacher tells her to put the sugar cube into the water. sally puts the cube into the glass of water and watches as it dissolves. then, the teacher tells sally to estimate the new mass of the glass of sugar-water.
what should sally guess as the new mass of the glass of sugar-water?

Sally should guess that the glass of sugar-water will have a mass of 110 g since the masses from the glass of water (100 g) and the sugar cube (10 g) will combine. it will be 110

the answer is d. 74.02

substituting a hydrogen atom with a halogen in a hydrocarbon:

- the single bond remains single. a is wrong.

- the bond with hydrogen is as strong as with a halogen. c is wrong

- a hydrocarbon is saturated if there is no double bond. we do not know that so d is wrong.

- carbon will always have four valence electrons. e is wrong.

by elimination, the correct answer is b. the boiling point of the new compound increases.