8. The ability of water molecules to form hydrogen bonds with other water molecules and water's ability to dissolve substances that have charges or partial charges are _____.
a) both caused by water's ability to form covalent bonds with hydrophobic substances
b) due to water's partial charges and low molecular mass, respectively
c) both caused by water's partial charges
d) both caused by water's two electron shells and the opposite spins of those shells
e) both due to water's low molecular mass
18. Water molecules have _____ than molecules of similar size, such as ammonia and methane
a) lower specific heat
b) a higher boiling point
c) a lower melting point
d) a lower capacity for forming hydrogen bonds
e) less surface tension
28. Sucrose has a molecular mass of 342 daltons. To make a 2-molar (2 M) solution of sucrose, _____. ( Concept 3.2)
e) stir 342 g of sucrose in water to dissolve the sugar, and then add enough water to bring the total volume of the solution to 1 L
a) stir 684 g of sucrose in water to dissolve the sugar, and then add enough water to bring the total volume of the solution up to 2 L
b) stir 684 g of sucrose in water to dissolve the sugar, and then add enough water to bring the total volume of the solution up to 0.5 L
c) stir 342 g of sucrose in water to dissolve the sugar, and then add enough water to bring the total volume of the solution up to 2 L
d) stir 342 g of sucrose in water to dissolve the sugar, and then add enough water to bring the total volume of the solution up to 0.5 L
a) both caused by water's ability to form covalent bonds with hydrophobic substances
b) due to water's partial charges and low molecular mass, respectively
c) both caused by water's partial charges
d) both caused by water's two electron shells and the opposite spins of those shells
e) both due to water's low molecular mass
18. Water molecules have _____ than molecules of similar size, such as ammonia and methane
a) lower specific heat
b) a higher boiling point
c) a lower melting point
d) a lower capacity for forming hydrogen bonds
e) less surface tension
28. Sucrose has a molecular mass of 342 daltons. To make a 2-molar (2 M) solution of sucrose, _____. ( Concept 3.2)
e) stir 342 g of sucrose in water to dissolve the sugar, and then add enough water to bring the total volume of the solution to 1 L
a) stir 684 g of sucrose in water to dissolve the sugar, and then add enough water to bring the total volume of the solution up to 2 L
b) stir 684 g of sucrose in water to dissolve the sugar, and then add enough water to bring the total volume of the solution up to 0.5 L
c) stir 342 g of sucrose in water to dissolve the sugar, and then add enough water to bring the total volume of the solution up to 2 L
d) stir 342 g of sucrose in water to dissolve the sugar, and then add enough water to bring the total volume of the solution up to 0.5 L