Test
Chapter 7 &8
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Preguntas del test (36)
1The splitting of an ion pair into free ions capable of carrying an electric charge ?
- ACrenation
- BBrownian Motion
- CTyndall effect
- DDissociation
2The scattering of light by colloid particles is?
- ACrenation
- BBrownian motion
- CTyndall effect
- DDissociation
3the swell and eventually rupture of cell is ?
- Ahypotonic solution
- Bcrenation
- Chemolysis
- Dhypertonic solution
4what is a solution with higher osmotic pressure than within the cell. water flows out of the cells and shrink?
- Ahypotonic solution
- Bcrenation
- Chemolysis
- Dhypertonic solution
5a substance changes directly to a gas from a solid
- Avapor
- Bsublimation
- Cevaporation
- Dvolatile substance
6what is the weakest of all intermolecular forces ?
- Alondon force
- Bhydrogen bond
- Ccovalent bond
7the defining expression for the molarity concentration unit ?
- Amoles of solute / liters of solution
- Bmoles of solute / liters of solvent
- Cgrams of solute / liters of solution
- Dgrams of solute/ liters of solvent
8in which are the following pairs of properties are both members of the pair colligative properties ?
- Aosmotic pressure, boiling point
- Bvapor pressure, phase changes
- Csolubility , freezing point
- Dfreezing point depression, boiling point elevation
9the secret of making southern sweet tea, is sweeting it when hot. what kind of solution is this?
- Asupersaturated
- Bunsaturated
- Cdilute
- Dsaturated
10what is the volume, in milliliters, of 4.0M NaOH is needed to prepare 145ml of 0.15M NaOH by dilution ?
- A3.9*10^3 ml
- B5.4ml
- C2.6*10^-4 ml
- D0.18 ml
11A 0.300M solution of LiOH that contains 0.500 mole of solute would have a volume, in milliliters, of
- A30.0ml
- B60.0ml
- C6.00*10^2 ml
- D1.67*10^3 ml
12what is the molarity of a solution contaning 16.7 grams o NH3 in 1.50 liters of solution ?
- A0.0653M
- B0.653M
- C1.53M
- D11.1M
13Calculate the concentration in % (m/m) of a solution contaning 20.5 g of LiF dissolved in 340.0g of h20
- A1.4% (m/m)
- B5.69% (m/m)
- C6.03% (m/m)
- D6.42% (m/m)
14Boyle's law involves which of the following ?
- Aa direct proportion
- Ba constant volume
- Ca constant pressure
- Da constant temperature
15indicate what the missing words are in the following statement of Charles's law: At constant pressure, the volume of a gas sample is _______ proportional to its ___________ temperature.
- Adirectly ,Celsius
- Bdirectly, kelvin
- Cinversely, celsius
- Dinversely, kelvin
16a gas has a volume of 2.6 liters at a temperature of 87 degree Celsius and pressure pf 1.30 atm. what is the volume of gas, in liters at a temperature of 367 degree celsius and a pressure o 4.70 atm ?
- A0.782L
- B1.28L
- C0.405L
- D9.80*10^4 L
17what is the volume, in liters, occupied by 2.12 moles of N2 gas at 0.745 atm pressure and a temperature of 55 degree Celsius?
- A42.5 L
- B1.3*10^-2 L
- C76.6L
- D12.8L
18the boiling point of a liquid is
- Athe temperature at which the rate of evaporation and sublimation are equal
- Balways 200 degree C or greater
- Cthe temperature at which the pressure over the liquid equals the vapor pressure of the liquid
- Dthe temperature at which liquid-vapor equilibrium
19liquids will boil at lower temperatures at higher elevations because:
- Athe intermolecular attractions are weaker
- Batmospheric pressure increases
- Cit is harder to transfer heat to the liquid
- Dthe vapor pressure at which boiling occurs is lower
20a sample of 425 ml of neon is heated from 120 C to 350 C. if pressure is kept constant . what is the new volume ?
- A1188.9ml
- B674ml
- C750ml
- D1.19*10^3 ml
21a sample of 265 ml of nitrogen is initially at a pressure 2.50 atm . if the pressurse change to 749 mmhg, what is the new volume in ml?
- A0.851 ml
- B101ml
- C573ml
- D672 ml
22What unit of temperature is used in gas law calculations ?
- Adegrees Fahrenheit
- Bdegrees celsius
- Ckelvin
- Deither degrees celsius or degree fahrenheit
- Eeither degrees celsius or degree kelvin
23what increases if you warm a gas in a balloon?
- Aelectrostatic interaction
- Bkinetic energy
- Ccompressibility
- Dpotential energy
24When the combined gas law is rearranged to solve for v2 thefollowing is the correct expression: v2=
- AT2T1V1/P2P1
- BP1V1T2/P2T1
- CP1V1T1/P2T2
- DT2T2/P2V1T1
- EP1V1/T1-P2/T2
25a hyrogen bond is
- Aan attraction between a hydrogen atom attached to N,O, F and an N,O, F atom on another molecule
- Ba covalent bond between H and O
- Can ionic bond between H and another atom.
- Da bond that is stronger than covalent bond
- Ethe polar O-H bond in the water
26a solution is prepared by dissolving 2g of KCL in 100g of H20. in this solution , H20 is the
- Asolute
- Bsolvent
- Csolution
- Dsolid
27a model that explains the behavior of gaseous particles is ?
- Acharles's law
- Bkinetic energy
- Cboyle's law
- Dideal gas law
28when some of the sugar is added to iced tea remains undissolved at the bottom of the glass, the solution is ?
- Adilute
- Bpolar
- Cnonpolar
- Dsaturated
29an increase in the temperature of a solution usually
- Aincreases the boiling point
- Bincreases the solubility of a gas in the solution
- Cincreases the solubility of a solid in the solution
- Ddecreases the solubility of a solid in the solution
- Edecreases the solubility of a liquid in the solution
30which one of the following compunds will NOT be solule in water?
- ALiOH
- BK2S
- CBaSO4
- DNaNO3
31During a phase change what happens ?
- Asteam evaporates
- Btemperature climbs
- Cthe temperature stays the same
- Dice sublimates to gas
32mathematical expression of the ideal gas law
- Ap1V1=P2V2
- BP1/T1=P2/T2
- CP1/V1=P2/V2
- DPv=nRT
33a barometer is a device for measuring
- Aatmospheric pressure
- Bblood pressure
- Cgas pressure in a container
- Dgas pressure in the lung
34rubbing alcohol is 70% ispropyl by volume. how many ml of isopropyl alcohol are ina 1 pint(473ml) container ?
- A70.0ml
- B0.15ml
- C680ml
- D470ml
- E330ml
35what is an example of a colloid ?
- AKool-Aid
- BSouthern sweet tea
- Cjello
- Dmilk of magnesia
36a substance that has water molecules attached to it ?
- Aanhydrous
- Bhydrogropic
- Csuspension
- Dhydrate
Información
- Descripción
- Chemistry Test sobre Chapter 7 &8, creado por Erica Fields el 05/04/2017.
- Autor
- Erica Fields
- Idioma
- English
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- 3
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- Valoración
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