Consider the following equilibrium: h2co3(aq) + h2o(l) h3o+(aq) + hco3-1(aq). what is the correct equilibrium expression? ka=[h3o+][hco1−3][h2co3] ka=[h3o+][h2co3][hco1−3] ka=[h2co3][h2o][h3o+][hco1−3] ka=[h3o+][hco1−3][h2co3][h2o]

Most materials are not magnetic because their magnetism has worn off. their magnetic domains are arranged randomly. they lack magnetic fields. earth’s heat has destroyed their magnetism.

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.)

4. a 20-kg child is tossed up into the air by her parent. the child is 2 meters off the ground traveling 5 m/s. circle one: ke / gpe / both show your work for finding the values of each type of energy the object has: