Question

How many grams will be left after it has decomposed into 25% of the original sample?
A) 1.25 g
B) 2.50 g
C) 5.00 g
D) 10.0 g

Answer 1

To find out how many grams will be left after a sample has decomposed into 25% of the original amount, you need to know the weight of the original sample. However, since the original sample's weight isn't provided in your question, I can show you how to calculate it if you know the original weight.

Let's denote the original weight as \( x \) grams. If the sample decomposes to 25% of its original amount, the remaining weight can be calculated as:

\[
\text{Remaining weight} = 0.25 \times x
\]

Now, if you have a specific original weight, you can substitute it into the equation above.

For example:
- If the original weight is 5 g, then \( 0.25 \times 5 = 1.25 \) g.
- If the original weight is 10 g, then \( 0.25 \times 10 = 2.5 \) g.
- If the original weight is 20 g, then \( 0.25 \times 20 = 5 \) g.
- If the original weight is 40 g, then \( 0.25 \times 40 = 10 \) g.

Given the multiple choice answers you provided (A, B, C, D), without the original sample weight, I can't determine which one is correct.

If you know the original sample weight, you can substitute it into the formula to find the answer that corresponds with your choices.