Can someone help me solve these chemistry problems?

Lola

New member
FACTOR LABEL METHOD HELP!

What is 7.86 x 10^2 liters in deciliters?

If the density of an object is 2.87x 10^4 lbs/cubic inch, what is its density in g/mL?

How many atoms of Copper are present in a 1.2 kilogram sample? (63.54 grams Cu)

How many milliwatts are in 200 MW?

These are the only questions im stuck on from the 20 questions i had to answer. please help =)
 
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