Mixture or "pure substance" on the blank
1. It is made up of elements in fixed proportions.
2....
Mixture or "pure substance" on the blank
1. It is made up of elements in fixed proportions.
2. The components can be readily separated, e. g. by filtratio
or distillation
3. The boiling point changes (rises) as the substance boils
away in distillation
4. It is very difficult to separate the components of the
substance
5. The elements or compounds are not in fixed proportions
6. The substance melts or boils at a specific temperature
7. The substance melts gradually over a few degrees
temperature range
8. There is no significant energy change on its formation
Answers: 3
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During which time interval does the object travel approximately 10 meters
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What is the percentage of hydrogen in nitrogen trihydride
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Given the following at 25c calculate delta hf for hcn (g) at 25c. 2nh3 (g) +3o2 (g) + 2ch4 (g) > 2hcn (g) + 6h2o (g) delta h rxn= -870.8 kj. delta hf=-80.3 kj/mol for nh3 (g), -74.6 kj/mol for ch4, and -241.8 kj/mol for h2o (g)
Answers: 1
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