What volume of a 0.100mhcl stock solution should be used to prepare 250.00ml of 0.0250mhcl?

What is the theoretical yield of carbon dioxide? a)0.993 gb)2.98 gc)3.65 gd)8.93 g

The name of the ion, s2-, is: sulfurous ion sulfide ion sulfur ion sulfate ion

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.)