URGENT: using the activity series in table 3 on page 286 predict whether each of the possible reactions listed below will occur. for the reactions that will occur, write the products and balanced equations 1. Ni(s) + CuCl2(aq) -->
2. Zn(s) + Pb(NO3)2(aq) -->
3. Cl2(g) + KI(aq) -->
4. Cu(s) + Fe(SO4(aq) -->
5. Ba(s) + H2O(l) -->

PLEASE answer ALL the questions ASAP (12 points per question)

I dont understand what your trying to ask me

h let me think

in scientific notation, the value of the  speed of light in a vacuum

  will be written as 2.995 * 10^8. when this value is represented in the form of

  a * 10^b, then, a = 2.995 and b = 8.

the value of the speed of light in a vacuum given above can also be rounded up to approximately 300000000. in this case, the scientific notation will be written as 3 *10^8.