Chemical change happens when a substance combines with
another substance to form a new substance. It produces chemical reactions and
generally is not reversible except by further chemical reactions. Heat is sometimes
produced in some reactions. When chemical reactions occur, the atoms are
rearranged and an energy change happens along with it as new products are
generations. At a molecular level, chemical changes involves the making or
breaking of bonds between atoms. Some examples of chemical change are iron
rusting (iron oxide forms) and bread rising (yeast converts carbohydrates into
carbon dioxide gas).
4.2 hours, do 315 miles / 75 miles per hour
An Olympic decoration is granted to effective contenders at one of the Olympic Amusements. There are three classes of decoration: gold, granted to the victor; silver, granted to the first sprinter up; and bronze, granted to the second sprinter up.
Answer:
Hi, the given equation has some missing parts. Actual equation is- '
'
balanced equation: 
Explanation:
Balance O and H in basic medium: 
Balance charge: 
........(1)
Balance charge: 
.....(2)
![[equation(2)\times 4]+[equation (1)]:](https://tex.z-dn.net/?f=%5Bequation%282%29%5Ctimes%204%5D%2B%5Bequation%20%281%29%5D%3A)
is present on the left hand side of balanced equation and it's coefficient is 6
