4.90 gram of KCLO3 is heated. it shows a weight loss of 0.384 gram . what is he percent of original KCLO3 which has decomposed .
The problem is worded in a confusing manner. I think the weight loss represents the decomposed part.
% = (0.384/4.90)*100 = ?
If you want the percent remaining of the original it is [(4.90-0.384)/4.90]*100 = ?
20.2
To find the percentage of the original KCLO3 that has decomposed, you need to calculate the weight loss as a percentage of the original weight of KCLO3.
First, determine the original weight of KCLO3 by subtracting the weight loss from the initial weight.
Original weight of KCLO3 = Initial weight - Weight loss
Original weight of KCLO3 = 4.90 g - 0.384 g = 4.516 g
Next, calculate the percentage of the original KCLO3 decomposed by dividing the weight loss by the original weight and multiplying by 100.
Percentage of KCLO3 decomposed = (Weight loss / Original weight) × 100
Percentage of KCLO3 decomposed = (0.384 g / 4.516 g) × 100 ≈ 8.50%
Therefore, approximately 8.50% of the original KCLO3 has decomposed.