Mass box A = 10 grams; Mass box B = 5 grams; Mass box C—made of one A and one B

How many grams of A would be needed to give the same number of particles:

as 7.5 grams of B?
as 2.5 grams?
as 12.5 grams?
as 1 gram?

Question

Mass box A = 10 grams; Mass box B = 5 grams; Mass box C—made of one A and one B

How many grams of A would be needed to give the same number of particles:

as 7.5 grams of B?  
as 2.5 grams?  
as 12.5 grams?  
as 1 gram?

aaronq · Answer

Mass box A = 10 grams; Mass box B = 5 grams; 

Mass box C=A+B= 15 grams

how much does each individual particle weigh?

it's not possible to figure it out without knowing that.