Please help me with these questions, any help would be greatly appreciated and please explain how you got the answer
How many grams of NaNO3 would have to be added to 100. grams of water at 45°C to make a saturated solution of this salt?'
1)100.
2)110.
3)120.
4)130
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Which aqueous solution has the lowest freezing point?
1)1.0 M C6H12O6
2)1.0 M C2H5OH
3)1.0 M CH3COOH
4)1.0 M NaCl
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What is the concentration of O2(g), in parts per million, in a solution that contains 0.008 gram of O2(g) dissolved in 1000. grams of H2O()?
a)0.8 ppm
8 ppm
c)80 ppm
d)800 ppm
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When 5 grams of KCl are dissolved in 50. grams of water at 25°C, the resulting mixture can be described as
a)heterogeneous and unsaturated
b)heterogeneous and supersaturated
c)homogeneous and unsaturated
d)homogeneous and supersaturated
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Ionic solids will most likely dissolve in
a)H2O(l), which is a polar solvent
b)H2O(l), which is a nonpolar solvent
c)CCl4(l), which is a polar solid
d)CCl4(l), which is a nonpolar solvent
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Based on Reference Table F, which of these salts is the best electrolyte?
a)sodium nitrate
b)magnesium carbonate
c)silver chloride
d)barium sulfate
This post was edited by marklink on Feb 6 2009 01:29am