Answer:
an organ system Is a group of organs that work together to perform a com
Explanation:
that is the answer organ system
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Mercury is the smallest and closest plant to the sun
Answer:

Explanation:
Step 1. Calculate the pOH
pOH =-log[OH⁻]
pOH =-log(1.0 × 10⁻⁹)
pOH = 9.00
Step 2. Calculate the pH
pH + pOH = 14.00
pH + 9.00 = 14.00

Answer:
all these are physical properties except release of heat so it's probably heat energy given off