3. in every chemical or physical change
Answer:
Potassium
Explanation:
Most reactive metal in the reactivity series
Answer:
127.28 mmHg
Explanation:
The molar fraction of oxygen in dry air at 760 mmHg is 20.9%. This molar fraction is not affected too much by the height, so it may be taken as a constant. The partial pressure of oxygen may be calculated as:

So, if the total pressure is 609 mmHg,
mmHg.
Answer:
Results cannot be generalized. Looking at this table, it can be hard to see how the two types of data can be combined. Indeed, while they are fundamentally different quantitative and qualitative data share an important relationship with one another and, when integrated properly, can make each other more useful.
Explanation:
Hope this helps!