How much two cups of something weigh depends entirely on what's in the cups; you'll need to specify.
For example, two (US standard) cups of flour weigh about 8.8 oz (250 g), while two same-size cups of rice weight about 13 oz (380 g).
Liquid weight is different from dry weight. Two cups of liquid = 16 fluid ounces.
It depends on what you are measuring. Two cups of ketchup is going to weigh more than two cups of sliced zucchini. If you are at the store buying zucchini and you need two cups, you would have to eyeball it. I usually end up buying more than I need.
About 2 cups
It depends on what you are measuring. 2.25 cups of marshmallows would weigh much less than 2.25 cups of butter.
3 cups per day if they weigh 60 pounds. 3 1/2 cups per day if they weigh 70 pounds.
That is approximately 500 grams
One and a half cups plus a tablespoon, if you're using plain granulated table salt.
16 cups of plain white flour weighs exactly 2Kg.
There are approximately 2 cups of salt in 1 pound.
Three cups of water weighs approximately 709 grams or 24.9 ounces.
There are approximately 2 cups per pound in material like salt. So you are talking about 6 1/4 cups.
That is approximately 248 grams
One cubic centimeter (cc) of salt typically weighs about 2.16 grams.
There are 2 cups in a pound of salt