2. A 6-g sugar cube (C12H22011) is dissolved in a cup of hot tea. The solution is 600 g. What is the percent by mass of the sugar?
1%
10%
60%
100%

Before it was launched, a helium-filled balloon had a pressure of 201 kpa at a temperature of 27°c. at an altitude of 15,000 m, the pressure had decreased to 2.5 kpa and the temperature had dropped to -14 °c. the volume of the balloon increased to 59.3 m3. what is the original volume of the balloon? 13 m3 0.85 m3 0.077 m3 1.17 m3