It is Acid Rain since animal activity and plant groth are not types of chemical weathering definetely with frost wedging being physical weathering.
1.54^-10 m, you bring the decimal point back to the position after the first whole number and count the places it took to get it there. If you're moving it backwards, the exponent will be negative, and if you're moving it forwards the exponent will be positive
Answer:
B. High temp and low pressure
Explanation:
I got an A on my chem final :) Got this right.
Number of valence electrons (they all have 7 valence electrons)