Misc: In The Sound of Music the Von Trapp family have seven children. Name the two boys?

Questions

Nicotinic acid is listed on breakfast cereal boxes as?

The hottest flame known is produced with carbon subnitride (C4N2), which can generate a temperature of ____?

Ninety eight per cent of the weight of water is made up from?

For every extra kilogram carried on a space flight, _____ kg of excess fuel are needed at lift-off?

Sugar was first added to chewing gum in ____ . . . by a dentist ( William Semple)?