How many joules are required to raise the temperature of 15.0 grams of water by 10 degrees celsius?

The question is based on the Thermodynamic principle of Specific Heat Capacity. Now, Specific Heat Capacity refers to the amount of heat needed per unit mass t raise the temperature by one degree Celsius

The formula that can be used to find the answer is the following:
   Q = C · m · ΔT ( where Q is the heat added/required; C is the specific heat capacity [4.186 joule/gram °C]; ΔT is the change in temperature)

Based on the question, what needs to be found is Q, and what is known is that C = 4.186 J/g °C; m = 15 g;  ΔT = 10 °C

so,           Q = C · m · ΔT
                Q = (4.186 J/g °C) (15 g) (10 °C)
                Q = 627.9 J

Thus, the number of joules required to raise the temperature of 15.0 grams of water by 10 degrees Celsius is 627.9 J

And a) oxygen i believe

Decomposition is the cycle at which bacteria breaks down any organic material into the soil