Regarding the law of 100 Berachot that a person is supposed to try to make everyday. How does he accomplish that on Yom Kippur? Being that it’s a fast day and he’s not eating, so he loses a lot of the Berachot. And also the Amidot are only 7 Berachot as opposed to the nineteen Berachot Amida that he has during the week. So the Chachamim tell us, that in order to alleviate this problem, besides praying all the Berachot during of the Tefilot of the day, and besides the Asher Yatzar, (which is said when he goes to the bathroom and comes out which of course counts on the list), but also him listening to the Berachot of the Chazara of the Amida and answering Amen to the Berachot. These too can count as part of the 100 Berachot. And also when he listens and answers Amen with Kavana, to those that are going up to the Sefer Torah.
Additionally, there is a custom, because of this need to come up with Berachot, is to have Bisamim (good smelling item) on Yom Kippur and smell it from time to time in order to add to the Berachot. You see some people bring to the Synagogue before Yom Kippur a lemon, and in the lemon they pierce in it Tziporen (cloves.) And they from time to time smell it. One reason is in order to give them strength and to wake them up, but also in order to make the Beracha.
It’s interesting what the Beracha would be on a lemon that you put the cloves in. There are some people that make the Beracha on lemon, ‘Hanoten Reach Tov BaPerot.’ However, that’s a mistake, because that Beracha is only made on a fruit that is going to be used also for eating. However, once you designate it specifically for smelling, the Beracha is ‘Bore Atze Bisamim.’ Now this lemon that you are brining to Synagogue is already designated before the Holiday for smelling purposes. So you turned it into a Bisamim, and the Beracha for a lemon would be ‘Atze’. And for another reason it wouldn’t be ‘Hanoten Reach Tov BaPerot.’ It’s because the smell of a lemon comes from the peel. And according to the Rashba, a peel does not have the status of a fruit. So therefore, the Halacha Lema’ase, those that are smelling the lemon or the cloves or combined, they should make on the Holiday ‘Bore Atze Bisamim’, and when they put it down and there mind is off it, and later on they pick it up again, they can make another Beracha. But so long as their mind was on it, then one Beracha covers them.