calculate the pH at 25 degrees Celsius of a 0.61 m solution of a weak base be with a kb of 1.5 x 10^-4​

What is the mass of each element in a 324.8 sample of co2

Which diagram shows the correct way to represent an ionic compound of magnesium oxide?

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.)