Please answer both questions.

A.) How many moles of nickel will react with 9.91 mol of hydrochloric acid?

B.) How many moles of NiCl2 can be formed in the reaction of 8.00 mol of Ni and 16.0 mol of HCl?

- lead + phosphoric acid = hydrogen + lead(ii) phosphate

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.

i'm wiling to try and you : )