The balanced reaction is
Ca + 2H2O → Ca(OH)2 + H2
Here this reaction can be compared with
A + BC ---> AB + C
So here one reactant (A) is accepting a group which is being given by another compound (BC) however the A is not giving any group / element or ion
So this single displacement
Similarly in the given reaction
the anion OH- is only being replaced
The element Ca accepts OH- and H2O loses the same group to form new element H2
So the correct answer is
Single replacement also known as single displacement
* Lab question: How can you distinguish a physical change from a chemical change?
> Format: How can you distinguish A from B?
Answer! Comparison: physical changes vs. chemical changes
Answer:
pioneer species, soil formation, plant growth
Explanation:
The events of succession after a volcano erupted in the proper order include pioneer species being visible. The pioneer species such as algae and Moss are usually found on rocks and dead matter.
After sometime the soil starts to form through weathering activities which then gives rise to and supports the growing of plant species.
Answer:
I'd say the answer is B) Load.
Hope this helps. :-)
The conversion of pressure from kilopascal to atmosphere can be done by the dimensional analysis using the proper conversion factor. Shown below is the calculation,
(2.000 x 10^4 kPa)( 1 atm / 101.324 kPa) = 197.38 atm
Thus, the pressure in atmosphere is 197.38 atm.