Terms in this set (25)
Consider a sample of helium and a sample of neon, both at 0.0*C and 1atm. Both samples have a volume of 5.0 L. Which statement concerning these samples is not true?
-the density of the neon is greater than the density of the helium
-each sample weighs the same amount
-each sample contains the same number of atoms of gas
-each sample contains the same number of moles of gas
each sample weighs the same amount
A 150.0 mL sample of a 12.0 M solution of HCl is diluted to 250 mL. What is the new concentration
A 250 mL sample of gas at 1.00 atm and 20.0*C has the temperature increased to 40.0*C and the volume increased to 500mL. What is the new pressure?
Which measurement represents the largest value of pressure?
-these all are equivalent pressures
-the answer depends on the gas being measured
-755 mm Hg
What is the molarity if a solution prepared by dissolving 3.50 mol NaCl in enough water to make 1.50L of solution?
How many moles of CO are contained in a 5.00 L tank at 155*C and 2.80 atm?
The passage of small particles but not larger particles across a semipermeable membrane is called?
How many grams of FeSO₄ are present in a 20.0 mL sample of a 0.500 M solution?
A mixture of the gases N₂, O₂, and He has a total pressure if 760 mm Hg. If the partial pressure of N₂ is 90 mm Hg and of O₂ is 270 mm Hg, What is the partial pressure of He?
400 mm Hg
How many grams of NaOH are needed to make 750 mL of a 2.5% (w/v) solution?
Red blood cells are placed in a solution and are observed to swell. Therefore the solution is...
What is the molarity if a solution prepared by dissolving 36.0 of NaOH in enough water to make 1.50 L of solution?
What pressure will 2.6*10²³ molecules of H₂ exert in a 3.9L container at 45*C?
How many mL of a 5.00% (w/v) glucose solution are needed to provide 20.0 g of glucose?
For the following reaction, if 5.6 L of nitrogen are reacted to form NH₃ at STP, How many liters of hydrogen will be required to completely consume all of the nitrogen?
N₂ + 3H₂ → 2NH₃
Which statement best explains the meaning of the phrase "like dissolves like"?
-A solvent will easily dissolve a solute of similar mass
-A solvent and solute with similar intermolecular forces will readily form a solution
-The only true solutions are formed when water dissolves a polar solute
-The only true solutions are formed when water dissolves a non-polar solute
A solvent and solute with similar intermolecular forces will readily form a solution
How many moles of solute are present in 12.0L of a 3.00 M HCl
What will be the new volume when 128mL of gas at 20.0*C is heated to 40.0*C while pressure remains unchanged?
The volume of a gas with a pressure of 1.2 atm increases from 1.0L to 4.0L. What is the final pressure of the gas, assuming constant temperature?
Which of the following samples will have the greatest volume at STP?
- 22g CO
- 22g O₂
- 22g He
- 22g Cl₂
-all of these samples would have the same volume at stp
22 g He
How many mL of a 0.200 M KOH solution contains 10.0g of KOH?
What is the molarity of a solution prepared by dissolving 10.0 g of acetone, C₃H₆O, in enough water to make 250.0 mL of solution?
In comparing liquids and gases, liquids have _______ compressibility and ________ density.
A hydrogen bod is ...
-a bond that is stronger than a covalent bond
-a covalent bond between H and O
-an ionic bond between H and another atom
-an attraction between a hydrogen atom attached to N, O, or F and an N, O, or F atom
-the polar O-H bond in water
an attraction between a hydrogen atom attached to N, O, or F and an N, O, or F atom
How much heat must be added to increase 20g of water from 30*C to steam at 100*C?
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Chemistry 305 - Chapter 2
ch 7 chem 30A