Step 
<u>find the mass of a single washer</u>
Divide the total mass by the number of washers


Step 
<u>Convert kg to mg</u>
we know that

so

therefore
<u>the answer is</u>

Answer:
What do you need help with?
Explanation:
Answer:
hydrgen = i think it is 4
oxygen = i think it is 3
Explanation: