I'm pretty sure it's called a volcanic winter, look up my answer to be correct though.
Physical Change
It is being changed by the sun
Using the relative atomic weights of both copper and sulfur ie copper = 63.55 and sulfur is 32.06 so 63.55+32.06=95.56 total mass and so of this, copper = 63.55/95.56=66.4%. So to get 10 grams of copper, use the formula 10g=66.4%xCuS so CuS=10/0.664=15.06 grams of CuS.
Answer:
a
Explanation:
the answer is a i'm pretty sure it might be wrong tho i'm sorry
Fe2O is the formula for that
