June 2022 Chemistry Regents #11-15
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Questions |
Answer | Links |
Explanations |
| 11 Which sample at STP has the same chemical
properties as 10. grams of Al(s) at STP?
(1) 10.grams of Si(s) (3) 5 grams of Al(s) (2) 10. grams of Na(s) (4) 5 grams of Mg(s) |
3 | the same element will have the same chemical properties | |
| 12 Which sample of matter can not be
broken down by a chemical change?
(1) antimony (2) ethanol (3) methane (4) water |
1 | definition of an element | |
| 13 Based on Table F, which 10.-gram sample, when
thoroughly mixed with 1 liter of water at room temperature, forms a
heterogeneous mixture?
(1) ammonium chloride, NH4Cl (2) potassium iodide, KI (3) silver bromide, AgBr (4) sodium nitrate, NaNO3 |
3 | heterogeneous will form
2 distinguishable parts
insoluble will not dissolve in water...2 distinguishable parts |
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| 14 Compared to a 1.0 M NaCl(aq) solution at 1.0 atm, a
2.0 M Nacl(aq) solution at 1.0 atm has
(1) a lower boiling point and a lower freezing point (2) a lower boiling point and a higher freezing point (3) a higher boiling point and a lower freezing point (4) a higher boiling point and a higher freezing point |
3 | a more concentrated solution has a higher BP and lower FP | |
| 15 Which list includes three forms of energy?
(1) temperature, chemical, thermal (2) temperature, thermal, alkalinity (3) electromagnetic, nuclear, chemical (4) electromagnetic, alkalinity, nuclear |
3 | temperature is not a
form of energy
alkalinity is a basic property |
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