a puddle evaporating = physical change
adding food coloring to water = chemical change
cutting an apple = physical change
denting a piece of metal = physical change
dry ice sublimating = I think is chemical change
iron rusting = chemical change
limewater and carbon dioxide forming chalk = chemical change
water boiling = physical change
vinegar and baking soda making bubbles = chemical change
paper burning = chemical change
Your welcome. I do sincerely believe that these are correct.
I think the best answer is B. Even this is the broadest case for the Conservation of matter and the one for Energy, the only way this can be applied is in nuclear rxns.
Mixtures can be broken apart by physical processes.
Answer:
+2
Explanation:
Since O &F Are more electronegative than N,
F=-1
2F=-2
O=-2
also the compound is neutral,
then 2N+2F+O=0
2N-2-2=0
2N=+4
N=+2
The way to start it is simply by converting 0.239 L of dinitrogen oxide gas into moles of gas using the ideal gas equation
at STP , 1 mol of gas is 22.4 L of gas, or you could simply use pv = nRT
hope this helps