Answer:
Option A= copper
Explanation:
According to specific heat capacity of substances, copper will reach to the our body temperature first.
Specific heat capacity:
It is the amount of heat required to raise the temperature of one gram of substance by one degree.
Formula:
Q = m × c × ΔT
specific heat capacity of copper = 0.385 J/g. °C
specific heat capacity of aluminium = 0.902 J/g. °C
so copper will absorb the heat very quickly and raise the temperature in very less time as compare to aluminium.
Moles Ag = 68.3 g / 107.868 g/mol=0.633
Because it is held together by weak forces so no much energy is needed to break the bond
Answer:
C. Hydrogen Ions.
Explanation:
The pH level of soils is measured based upon the acidity or basicity level in the soil. The pH scale usually measures between 0-14. 7 is the neutral pH level of soil and a pH level below 7 is considered acidic and above 7 is alkaline.
So, soil with a high amount of hydrogen ions (H+) will be considered acidic. As the amount of hydrogen ions increases in the soil, the pH level of the soil decreases, making it acidic.
Therefore, option C is correct.
