When steam is passed through red hot coke, a mixture of two gases is formed. explain with reaction

C(s) + H2O(g) → CO(g) + H2(g)

Explanation:

Carbon monoxide and hydrogen. Possibly some reaction products from impurities in the coke, but mostly CO and H2.

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.

acid rain does not usually kill trees directly. instead, it is more likely to weaken the trees by damaging their leaves, limiting the nutrients available to them, or poisoning them with toxic substances slowly released from the soil. the main atmospheric pollutants that affect trees are nitrates and sulphates.