How to get the mass of solution (in grams) given this information? Specific heat of solution – 4.19J/g°C Mass of NaOH pellets (grams) 20.0g Initial water temperature (°C) 20.0°C Final solution temperature (°C) 51.29°C Temperature change (∆°C) 31.29°C Mass of solution (in grams) = ?? also the equation is : NaOH(s) + H2O (l) → Na (aq) + OH (aq)

What is the mass of 8 moles of sodium atoms

Sulfur dioxide and oxygen react to form sulfur trioxide during one of the key steps in sulfuric acid synthesis. an industrial chemist studying this reaction fills a 25.0l tank with 4.5 mol of sulfur dioxide gas and 4.5 mol of oxygen gas at 30.°c. he then raises the temperature, and when the mixture has come to equilibrium measures the amount of sulfur trioxide gas to be 1.4 mol. calculate the concentration equilibrium constant for the reaction of sulfur dioxide and oxygen at the final temperature of the mixture. round your answer to 2 significant digits.

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.)