Set up alarms & timers
You can set up multiple alarms and timers with your voice. 
You can also set repeating alarms.
Note: You can adjust the alarm and timer volume independent of other sounds. 
Go to Settings > select your device > Sounds > Alarm and Timer Volume.

Alexa, wake me up at 6 in the morning.
Alexa, set the alarm for 7:30 a.m.
Alexa, set a repeating alarm for Tuesday at 4 p.m.
Alexa, set the timer for 10 minutes.
Alexa, how much time is left on my timer?
Alexa, what time is it?
Alexa, what's the date?
Alexa, when is my alarm set for?
Alexa, cancel the alarm for 7:30 a.m.
Alexa, cancel my alarm for Sunday.
Alexa, what alarms are set for tomorrow?
Alexa, what timers are set?
Alexa, stop. (when your alarm or timer alerts you)
Alexa, snooze. (when your alarm alerts you)
Alexa, cancel the timer for 10 minutes. (when you set up multiple timers)