Question
In an experiment, a student burns 25 g of a solid fuel. Its mass decreases by 23% Calculate the mass of the solid after the experiment.
Answer
4.1
(257 Votes)
Kendra
Master · Tutor for 5 years
Answer
The mass of the solid fuel after the experiment is 19.25 g.
Explanation
The question states that the initial mass of the solid fuel (mi) is 25g, and it decreases by 23%. We can consider this decrease as a loss in its original mass. This loss can be calculated using the percentage formula:Loss = original number × percentage loss / 100 Firstly, convert the percentage loss to its decimal form by dividing by 100, so 23% becomes 0.23.Secondly, plug the initial mass of the solid fuel (25g) and the decrease percentage (0.23) into the formula:Loss = 25g × 0.23 = 5.75gSo, the mass that it has lost due to burning is 5.75g.Then, calculate the final mass (mf) by subtract the mass loss from the initial mass:mf = mi - lossPlug in the known values:mf = 25g - 5.75g = 19.25g.So, after the experiment, the mass of the solid fuel would be 19.25g. This answer is equivalent with experts' as well.