A compound is found to contain 12.8 % C, 2.12 % H, and 85.1 % Br. If one liter (measured at STP) weighs 8.38 g, what is the molecular formula of the compound

What is the number of moles in 15.0 g ash3?

What relationship exists between an enzyme and a catalyst?

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