17.
Which will dissolve faster, 10 g of sugar cubes or 10 g of
powered sugar?
a) 10 g of powered sugar
c) They will dissolve at the same rate
b) 10 g of sugar cubes
d) It is impossible to determine

The boiling point of propanoic acid is higher than that of 1-butanol because: propanoic acid has a higher molecular weight than 1-butanol. propanoic acid is more soluble in water than 1-butanol. propanoic acid is a better hydrogen bond donor than 1-butanol. propanoic acid forms hydrogen bonded dimers and 1-butanol does not. 1-butanol forms hydrogen bonded dimers and propanoic acid does not.

Avariable that is not being directly tested during an experiment should be changed varied experimented controlled

Which of the following is an indication that a substance has undergone a chemical change? a. no new product has been formed. b. the color of the substance has not changed. c. the original constitute has not changed. d. the molecular structure has changed.