If 1.57 L of propane at 24°C and 51.5 kPa is completely burned in excess oxygen, how many moles of carbon dioxide will be produced?

the major pests we deal with are insects, weeds and fungal diseases. a pesticide is a product, whether organic or chemical, used to kill the target pest. there are other techniques gardeners should use that can prevent the severe infestations that make the use of pesticides necessary

i think it's letter a.