A 101 g of an unknown metal at 50 o C is placed in 40 g of water at 25.0 o C (C p for water is 1 cal/g o C). The temperature of the system at equilibrium is 29.7 o C. What is the unknown metal?

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.

the answer is 1 i believe

b.

the accuracy of the data.