it is 350
Grams
You could (theoretically) use either... However - Kilos is the preferred measurement.
kilograms because kilo means 1000
There are 1000 grams in a kilogram, and seeing how small a butterfly is, I'd use grams
kilograms
It matters on ow specific you want to be. Most commonly in grams.
You would weigh a baseball bat in kilograms.
I think it is kilograms
290kg
10 kilograms
It would actually weigh about 500 grams and it would not be very practical if your cereal box weighed more than you
You could (theoretically) use either... However - Kilos is the preferred measurement.
Grams
kilograms because kilo means 1000
kilometer
Grams and kilograms are measurement of weight. For a letter you would use grams. For a package you would use kilograms as it weight is more.
35 grams!
I would use grams because grams would give you more significant figures for the measurement than kilograms