Me!
water is treated to replace harmful chemicals, and bacteria so people can then drink it.
true or false?

100 grams of molten lead (600°c) is used to make musket balls. if the lead shot is allowed to cool to room temperature (21°c), what is the change in entropy (in j/k) of the lead? (for the specific heat of molten and solid lead use 1.29 j/g⋅°c; the latent heat of fusion and the melting point of lead are 2.45 × 104 j/kg and 327°c, respectively.)

What is the empirical formula of a compound that is 50.7% antimony and 49.3% selenium ?

Balance the following reaction. as2s3 + 9o2 → 2as2o3 + so2