Answer:
6 moles of oxygen, or 3O2.
Explanation:
I would build a proportion for this:

Answer:
Non-zero digits are always significant
Explanation:
firstly find for the molar mass of kcl and molar mass of k
and then
molar mass of k = x
molar mass of kcl= 40
cross mutiply and then simplify you will get your answer
Pipes are made of the element Lead so the answer should be d) lead pipe
The sand provides a rough surface on top of the ice for the cars' tires to grip onto. It provides more friction. Salt melts the ice and often provides more friction (the disadvantage is that it eats concrete!).