Two hundred grams of a substance requires 18.8 kj of heat to raise its temperature from 25°c to 45°c. use the table to identify the substance.

ammonia

Explanation:

Q= heat gained  = 18.8 kJ

m= mass of the substance = 200 g

c = heat capacity of unknown substance= ? J/g ° C      

Thus the unknown substance is ammonia which has a heat capacity of

the answer is b & c i believe : )

because natural gas is colorless, odorless, and tasteless, distributors add mercaptan (a chemical that smells like sulfur) to give natural gas a distinct unpleasant odor (it smells like rotten eggs). they locate the types of rock that are likely to contain natural gas deposits.