問題一覧
1
what is the state of elements located on the right-hand side of the periodic table?
gas
2
what is a volatile substance?
a liquid that readily evaporates at room temperature
3
Which of the following best defines the vapor pressure of a liquid?
the pressure exerted by a vapor in equilibrium with its liquid at a given temperature in a closed system
4
which of the following affects the boiling point and melting point of a solution at the same temperature
the percentage composition of the solution
5
which of the following mixtures can be separated using filtration
sand and water
6
which of the following is an ion?
an atom and molecule carrying a charge
7
which of the following mixture is separated by a separatory funnel?
oil and water
8
what is a saturated solution?
a solution in which the maximum amount of solute is dissolved in a fixed amount of a solvent at a certain temperature
9
At the ________, the vapor pressure becomes equal to the pressure just above the surface of the liquid pan and bubbles
boiling point
10
At the same temperature, the ______ of molecules in the solid, liquid and gaseous phases of a substance is the same
average kinetic energy
11
which of the following is a solution
ethanol and water
12
A beaker containing an ethanol solution should never be heated using an
bunsen burner
13
A mixture of sodium chloride and solid carbon dioxide can be separated by
sublimation
14
which of the following techniques is used to separate black ink into components
chronography
15
copper sulfate can be separated from it's solution by
crystallization
16
a _____ is a homogeneous mixture
solution
17
which of the following can be separated by distillation
pure water from sea water, water from sugar-water solution
18
a mixture of water and ethanol can be separated by
fractional distillation
19
which of the following is true about fractioning columns?
it is a long vertical tube containing obstacles and cooled only by air
20
a solution in which the solvent is water is called a ______ solution
aqueous
21
2.00 L of 1.0 M NaCl solution is prepared in a flask. 400.0 mL of the solution is poured out of the flask into a beaker. what is the concentration of the salt solution in the beaker?
1.0 M
22
Selectively solubility
sand and sugar mixture