- A pair of dice is rolled. What is the probability that the sum of the numbers rolled is 7?

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The pKa value for H2CO3 is 6.38. What mole ratio of NaHCO3 to H2CO3 is needed to prepare a buffer with a pH of 5.99? What is the role of myosin and actin in skeletal muscle contractions? Is it possible for a black hole to explode or supernova? theoretically? For which molecules will the electron-pair geometry be the same as the molecular geometry? a. SeH2 b.NF3 c.ClF3 d.NO2−. e.ICl6+? How should I calculate latent heat?

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