Explanation:
A substance burning in the presence of oxygen and leads to the formation of heat and light is called combustion.
Some important points about combustion are as follows:
- Fuel should be present for burning.
- Air should be present for the supply of oxygen.
- There should be heat (or ignition temperature) to initiate the chemical reaction.
I believe the correct answer is B
solution:
density x volume=mass volume x volume
13.6gml x 3.55ml
thus,the object has a mass of 98.3g
A reaction in which energy is absorbed from the surroundings is called anendothermic<span> reaction. In </span>endothermic<span> reactions the enthalpy of the products is greater than the enthalpy of the reactants. Because reactions release or absorb energy, they affect the temperature of their surroundings.
</span>
These would be your answers!
(taken from a source)
Follow the scientific method
Keep detailed records
Communicate experimental results
Hope that helped!
:)
