1 - Quia



3

Which of the following pairs will:

1)Share electrons

2)transfer electrons

Li & Br, Se & Br, C & O,

Ca & Cl

Answer: Share: C&O, Se&Br

Transfer: Li&Br, Ca&Cl

|3

What is the electron-dot diagram for CO?

Answer:

:O:::C: |3

What are ythe unique properties of H2O?

What is responsible for its unique properties?

Answer: Ice less dense than liquid water & high melting/boiling point due to: H-bonding

|3

What is the molar mass of Al2(SO4)3?

Answer:

Al: 2x26.98 =53.96

S: 3x32.07 =96.21

O: 12x16.00=192.00

= 342.17g/mol | |

|3 |3 |3 |3 |

|How many molecules are in 88g of CO2? |Name P2S5? |What is the reaction type? |What is this type of reaction? |

| | |2C2H6+7O2 ( |3H2 SO4 + 2Al ( Al2(SO4)3 +3H2 |

| | |4CO2 + 6H2O | |

| | | | |

|Answer: | | | |

|2 x 6.022x1023molecules |Answer: | |Answer: displacement |

|Or 12 x 1023 molecules |diphosphorous pentasulfide |Answer: combustion | |

|3 |3 |3 |3 |

|What is this type of reaction? |What is this type of reaction? |Name SF4 |Name Si3N4 |

|N2 + 3Mg ( Mg3 N2 |Na2CO3 ( Na2O +CO2 | | |

| | | | |

| | | | |

| | | | |

|Answer: synthesis |Answer: | |Answer: |

| |decomposition |Answer: |Trisilicon tetranitride |

| | |Sulfur tetraflouride | |

|3 |3 |3 |3 |

|Name Cu2O |Name Li2SO4 |When N2 + Mg ( Mg3 N2 |What phase changes are exothermic? |

| | |Is balanced what is the coefficient of | |

| | |Mg? | |

| | | |Answer: g(s |

| | | |l(s |

| | |Answer: 3 |g(l |

|Answer: Copper (I) oxide |Answer: Lithium Sulfate |(N2 + 3Mg ( Mg3 N2) | |

| | | | |

|3 |3 |3 |3 |

|At what points on a heating or cooling |According to KMT how much volume do gas |When temperature is constant, if |When pressure is constant, if |

|curve is the temperature |particles have and how well do they |pressure increases what happens to the |temperature decreases what happens to |

|constant(doesn’t change) |attract each other? |volume? |the volume? |

| | | | |

| | | | |

|Answer: melting/freezing |Answer: very little volume, very little |Answer: it decreases |Answer: it decreases |

|Boiling/condensing |attraction | | |

|3 |3 |3 |3 |

|If 2.0L of gas at 100K increases to 4.0L|If 2.0L of gas has a pressure of 600kPa,|Define Molarity |How many Liters of a 1.5M solution would |

|of gas, what is the new temperature? |what would the volume be if the pressure| |contain 3mol of Solute? |

| |decreased to 300kPa? | | |

|Answer: | | |Answer: 0.2L |

|T2=V2T1 4.0Lx100K |Answer: |Answer: |M = Moles of Solute |

|V1 2.0L |V1P1=V2 2.0Lx600kPa |Moles of Solute |Liters of Solution |

| |P2 300kPa |Liters of Solution |L of Solution = Moles of Solute |

|3 |3 |3 |3 |

|What is the Molarity of 5.8grams of NaCl|Which of the following would conduct |What type of bonding occurs in organic |According to KMT, Pressure is created by|

|in 4.0L of Solution? |electricity? |(biological molecules)? |what? |

| | | | |

|Answer: 0.025M |CO2, NaCl (aq), H2 | | |

|5.8x1mol = 0.10mol | | | |

|58 | |Answer: Covalent |Answer: Collisions of gas particles |

|0.10mol = 0.025M | | |against each other against the walls of |

|4.0L |Answer: NaCl (aq) | |their container |

| |(it contains mobile ions) | | |

|3 |3 |3 |3 |

|When someone walks into the classroom |A 500g sample contains 10g of Hg, what |How much energy is absorbed by 3.0grams |What unit is used to express heat in a |

|wearing too much Axe body spray, why |is this concentration in ppm? |of water when the temp. rises from 11(C |chemical reaction? |

|don’t the people at the back of the room| |to 15(C? | |

|notice the stench immediately? | | | |

| |Answer: |Answer: Q=mCpΔT=50J |Answer: Joule (J) |

|Answer: the particles diffuse over time |10gx1000000 parts = 20000ppm |M=3.0g | |

|by random collisions |500gx I million |Cp=4.18J/g(C | |

| | |ΔT=15-11=4.0(C | |

| | |3.0gx4.18Jx4.0(C | |

| | |g•(C | |

|3 |3 |3 |3 |

|Which of the following represent a |Which of the following represent a |Which of the following represent a |Given the reaction at equilibrium: |

|single element? |single compound? |mixture? | |

| |[pic] | |2CO(g)+O2(g) ( |

|[pic] | |[pic] |2CO2(g)+ Heat |

| |Answer: C | |If the temp is increased, what would be |

|Answer: A & B | |Answer: D |favored: products, reactants, or |

| | | |neither? |

| | | | |

| | | |Answer: Reactants |

|3 |3 |3 |3 |

|Given the reaction at equilibrium: |Given the reaction at equilibrium: |Given the reaction at equilibrium: |Given the reaction at equilibrium: |

|2CO(g)+O2(g) ( |2CO(g)+O2(g) ( |2CO(g)+O2(g) ( |2CO(g)+O2(g) ( |

|2CO2(g)+ Heat |2CO2(g)+ Heat |2CO2(g)+ Heat |2CO2(g)+ Heat |

|If the pressure is increased, what would|If more Co is added, what would be |If the temp is increased, the | |

|be favored: products, reactants, or |favored: products, reactants, or |concentration of COs will increase or |If the pressure increased, the |

|neither? |neither? |decrease? |concentration of CO2 will increase or |

| | | |decrease? |

|Answer: products |Answer: Products | | |

| | |Answer: Decrease |Answer: increase |

|3 |3 | 3 |3 |

|Given the reaction at equilibrium: |When temperature decreases, does |How much energy as heat is added to melt |How many atoms are in a monoatomic gas?|

|2CO(g)+O2(g) ( |Kinetic energy decrease or increase? |20.0grams of ice at 0(C? | |

|2CO2(g)+ Heat | | | |

|If CO2 is removed, what would be favored:| | | |

|products, reactants, or neither? | |Answer: 6680J | |

| | |Q=mΔHFus | |

|Answer: Products | |M=20.0g | |

| |Answer: it Decreases |mΔHFus=3334J/g | |

| | |20.0gx334J = 6680J |Answer: one |

| | |g | |

|3 |3 |3 |3 |

|How many atoms are in a diatomic gas? |Describe the shape and volume of | |Describe the shape and volume of a |

| |Silver. | |sample of Mercury at room temp. (hint :|

| | | |think of a thermometer) |

| | |Describe the shape and | |

| | | |Answer: |

| |Answer: | |Shape: unfixed |

|Answer: two |Shape: fixed | |Volume: fixed |

| |Volume: Fixed |Volume of a sample of Oxygen | |

| | | | |

| | | | |

| | |Answer: | |

| | |Shape: unfixed | |

| | |Volume: unfixed | |

|3 |3 | 3 |3 |

|If the vapor pressure of a liquid in a |When an atom turns unto a negative ion,|When a negative ion turns into a neutral |Explain what is happening to the liquid|

|closed system is decreasing, what is |what happens to the radius of the ion |atom, what happens to the radius of the |and gas particles in a closed system at|

|happening to the temp of the liquid? |and the number of electrons it has? |atom and the number of electrons it has? |equilibrium. |

| | | | |

| |Answer: The radius increases and the |Answer: the radius decreases and the |Answer: The # of particles turning into|

|Answer: it is decreasing |number of electrons increases |number of electrons decreases |gas is equal to the # of particles |

| | | |turning into liquid. |

|3 |3 |3 |3 |

|How does a catalyst change a chemical |Of the following, what does not affect |What will happen to the amount of sugar |What will dissolve more quickly, a sugar|

|reaction? |the solubility of a solid in a liquid: |that can be dissolved in a glass of |cube or sugar granules, and why? |

| |A: temperature |water if the temperature of the water | |

| |B: pressure |increases? | |

| |C: stirring | | |

| |D: surface area | | |

| | | |Answer: |

|Answer: it increases the reaction rate |Answer: B: pressure has greatest effect |Answer: more sugar can be dissolved |Sugar granules. More surface area |

| |on gas solubility | | |

|3 |3 |3 |3 |

|Why would stirring affect the rate of |What phase changes are endothermic? |Given the reaction: |Is the following endothermic of |

|dissolving? | |H2 + Cl2( 2HCl |exothermic? Is energy absorbed or |

| | |What is the minimum # of moles of H2 |released? |

| | |required to produce 1 mol of HCl? | |

| |Answer: | |X + Y (XY + energy |

|Answer: it increases the movement of the|s(l | | |

|particles which in turn increases the |l(g |Answer: 0.50ml |Answer: exothermic, released |

|dissolving rate. |s(g | | |

|3 |3 |3 |3 |

|Is the following endothermic or |What 3 elements in the following list |How is the periodic table arranged? |Convert 315K to (C |

|exothermic? Is energy absorbed or |have similar chemical properties? | | |

|released? | | | |

| |K, Ca, Na, Sc, Rb | | |

|Energy + X + Y ( XY | | | |

| | | |Answer: |

|Answer: endothermic, absorbed |Answer: Na, K, Rb |Answer: By increasing atomic number |315-273 = 42(C |

| |(same group) | | |

|3 |3 |3 |3 |

|Finish the following definition: Molar |The number of valence electrons that an |How many atoms are in 1 mole of hydrogen|Finish the following definition: |

|heat capacity is the amount of heat |atom has will determine that atoms _____|atoms? |Specific Heat capacity is the amount of |

|required to _____. |_____ | |heat required to _____. |

| | | | |

| | | | |

|Answer: Raise the Temp. of 1 mole of a |Answer: Chemical Properties | |Answer: Raise the Temp. of 1gram of a |

|substance by 1K ( or 1(C) | |Answer: 3 |substance by 1K ( or 1(C) |

| | |6.022x1023 | |

|3 |3 |3 |3 |

|What type of bond is formed when |What type of bond is formed when |Which element would most likely form an |Which element would most likely form a |

|electrons are shared between two atoms? |electrons are transferred from one atom |ionic bond with Li? |covalent bond with N? |

| |to another? | | |

| | |Na, Co, Br |Na, Zn, N |

|Answer: Covalent Bond | | | |

| |Answer: Ionic bond |Answer: Br |Answer: N |

|3 | | | |

|What phase changes are exothermic? | | | |

| | | | |

| | | | |

|Answer: | | | |

|g(l | | | |

|l(s | | | |

|g(s | | | |

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