A chemist adds 1.90L of a 2.18/molL sodium thiosulfate Na2S2O3 solution to a reaction flask. Calculate the moles of sodium thiosulfate the chemist has added to the flask. Round your answer to 3 significant digits.

A chemist prepares a solution of sodium thiosulfate Na2S2O3 by measuring out 100.g of sodium thiosulfate into a 450.mL volumetric flask and filling the flask to the mark with water.Calculate the concentration in /molL of the chemist's sodium thiosulfate solution. Be sure your answer has the correct number of significant digits.

The equation for the reaction is 2 Na S2 O3 (aq) + 2HCl(aq) o 2NaCl(aq) + H2 O(l) + S(s) + SO2 (g) Before starting her experiments, the student considers the risk to her of sulfur dioxide escaping from the flask. She uses this information. concentration of sodium thiosulfate solution = 0.300 mol/dm3 volume of sodium thiosulfate solution = 20 cm3 volume of water = 20 cm3 volume of hydrochloric acid = 10 cm3 The solubility of sulfur dioxide at room temperature is 100 g/dm3. Use this additional information to explain whether any sulfur dioxide gas escapes from the flask.

A chemist adds 125.0mL of a 0.77M barium acetate BaC2H3O22 solution to a reaction flask. Calculate the mass in grams of barium acetate the chemist has added to the flask. Round your answer to 2 significant digits.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20Question 16A chemical reaction takes place inside a flask submerged in a water bath. The water bath contains 9.10kg of water at 24.3°C. During the reaction 68.3kJ of heat flows out of the flask and into the bath.Calculate the new temperature of the water bath. You can assume the specific heat capacity of water under these conditions is 4.18·J·g−1K−1. Be sure your answer has the correct number of significant digits.

Suppose a 500.mL flask is filled with 1.6mol of NO3 and 1.3mol of NO2. The following reaction becomes possible:+NO3gNOg 2NO2gThe equilibrium constant K for this reaction is 3.44 at the temperature of the flask.Calculate the equilibrium molarity of NO2. Round your answer to two decimal places.