The buildup of lactic acid in muscles causes pain during extreme physical exertion. the ka for lactic acid (c2h5ocooh) is 8.4 × 10−4 . calculate the ph of a 0.06 m solution of lactic acid. 1. 2.297 2. 11.851 3. 2.174 4. 2.043 5. 2.149 6. 6.348 7. 1.926 8. 3.533

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.)

The biosphere of the earth is made up of what compound? organic or inorganic?

Calculate the estimated density of each ball. use the formula d = m/v where d is the density, m is the mass, and v is the volume. record your calculations in table a of your student guide. given that the density of water is 1.0 g/cm3, make a prediction about whether each ball will float in water. record your prediction in table a. what is the estimated density of the table tennis ball? record your answer to the nearest hundredth