A cooking gas cylinder is assumed to contain 6.7 kg of fuel gas (molar mass 58 g/mol). The heat of combustion of fuel gas is 2465 kJ/mol. A family needs 8 x 103 kJ of energy per day of cooking. Then how long would cylinder will last (approx.)? (Assume 29% of gas goes waste due to incomplete combustion).

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.

the answer is 0.42 is that is an option. this question provides no info

im doing test rn im going with 2 but ill give answer if itss wrong,   : )