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The question states:

**Jisim bagi suatu zarah ialah 0.26 × 10⁻²⁵ g. Carikan jumlah jisim dalam g, bagi 15 zarah.**

Translation:
The mass of one particle is \( 0.26 \times 10^{-25} \) g. Find the total mass in grams for 15 particles.

### Solution:
The total mass for 15 particles can be calculated by multiplying the mass of one particle by 15:

\[
\text{Total mass} = 15 \times (0.26 \times 10^{-25}) \, \text{g}
\]

Now let's calculate this.

\[
\text{Total mass} = 15 \times 0.26 \times 10^{-25} = 3.9 \times 10^{-25} \, \text{g}
\]

Thus, the total mass of 15 particles is \( 3.9 \times 10^{-25} \) grams.

Would you like more details on the calculation, or do you have any further questions?

### Related Questions:
1. What is the mass of 100 particles in grams if each particle has a mass of \( 0.26 \times 10^{-25} \) g?
2. How would the total mass change if the mass of each particle doubled?
3. What would be the total mass if there were 20 particles instead of 15?
4. If each particle had a mass of \( 0.5 \times 10^{-25} \) g, what would the total mass of 15 particles be?
5. How would you calculate the mass for 1 mole of such particles (using Avogadro's number)?

### Tip:
Always check units when performing calculations to ensure the result is in the desired unit, such as grams in this case.

Jisim bagi suatu zarah ialah 0.26 × 10⁻²⁵ g. Carikan jumlah jisim dalam g, bagi 15 zarah.

Learn how to calculate the total mass of 15 particles, each with a mass of 0.26 × 10⁻²⁵ g. This problem involves key concepts in multiplication and scientific notation. Suitable for students in Grades 6-8.

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