The atomic mass of element A is 63.6amu. Theo only naturally occurring isotopes of element A are A-63 and A-65. The percent abundances of element A are closest to? a) 31% A-63 and 69% A-65
b) 50% A-63 and 50% A-65
c) 100% A-63 and 0% A-65
d) 69% A-63 and 31% A-65

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.

Ais a mountain created from eruptions of lava, ash, rocks, and hot gases.

Ascientist measures the speed of sound in a monatomic gas to be 449 m/s at 20∘c. what is the molar mass of this gas?