At 20°C, the density of ethyl alcohol is 7.89 dg/mL, and that of water is 1.00 g/mL. Calculate the specific gravity of ethyl alcohol at 20 °C

Which characteristics can be used to differentiate star systems? check all that apply.

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.)

Find the mass, in grams, of 5.00*10^23 molecules of f2