Term
sodium oxide decomposing:
2NaN3 --> 2Na + 3N2(g)
what mass of sodium azide is required to provide the nitrogen needed to inflate a 75.0 L bag to a pressure of 1.3 atm at 25ºC? |
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Definition
| (about) 170 g NaN3 (student solutions manual p.169#33) |
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Term
a halothane-oxygen mixture (C2HBrClF3 +O2) is contained in a tank with the partial pressures:
halothane = 170 mmHg
O2 = 570 mmHg
is the tank contains 160g of O2, what mass of halothane is present? |
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Definition
300g
(student solutions manual p. 170 #39) |
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Term
You have two flasks of equal volume. Flask A contains H2 at 0C and 1atm pressure. Flask B contains CO2 gas at 25C and 2atm pressure. Compare these two gases with respect to each of the following:
a) average kinetic energy per molecule
b) average molecular velocity
c) number of molecules
d) mass of gas (ratio) |
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Definition
a) average kinetic energy depends on temperature, so canister B with have higher kinetic energy
b) v = sqrt[T/M] so H2 has a higher average velocity
c) since volume is equal, molecules are proportional. Multiply pressure and temperature for both and you get a ratio of 1.8:1 B:A => there are 1.8 times as many molecules in B as in A
d) multiply ratio (1.8:1) by molar mass of both gasses -- you get that the ratio will be 40:1 for any masses. |
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Term
| Gallium has two naturally occurring isotopes, with masses of 68.9257 and 70.9249 respectively. Calculate the percent abundances of these isotopes of gallium. |
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Definition
| 60.11% and 39.89% (p.18 #15 student solutions manual) |
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Term
| what is the net ionic equation for ALL reactions of a strong base and a strong acid? |
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Definition
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