Posted by GABBY on .
How many uranium atoms are there in 9.5 g of pure uranium? The mass of one uranium atom is 4 × 10−26 kg
11th grade -
convert 4 × 10−26 kg to grams by multiplying by 1000
(9.5 g of pure uranium)(1 atom/___g uranium atom)
notice the grams cancel out and all you're left is the unit atom