How many / How much...?
How many / How much...?
How many chili peppers are there?
这里有多少辣椒?
How much cereal do you have for breakfast?
你早餐吃了多少麦片?
We use many with count nouns and much with noncount nouns.
我们用many和可数名词连用,用much和不可数名词连用。