Explain the similarities and differences between a 1M solution of NaOH and a 1m solution of NaOH

(notice the M and m)

Similarity - 1 mol of NaOH in 1M and 1m.

Difference - 1M - 1 mol NaOH in 1L solution,

1m - 1 mol NaOH in 1000g solvent (water).

Explanation:

M - Molarity,  the number moles of solute are dissolved in 1 L of solution.

m - Molality is the number of moles of solute per 1 (kg) kilogram = 1000 g of solvent.

Similarity - 1 mol of NaOH in 1M and 1m.

Difference - 1M - 1 mol NaOH in 1L solution,

1m - 1 mol NaOH in 1000g solvent (water).

acid rain does not usually kill trees directly. instead, it is more likely to weaken the trees by damaging their leaves, limiting the nutrients available to them, or poisoning them with toxic substances slowly released from the soil. the main atmospheric pollutants that affect trees are nitrates and sulphates.