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To solve this problem, we need to find the total mass of 15 particles.

The mass of one particle is given as \( 0.26 \times 10^{-25} \) grams. To find the total mass of 15 particles, we simply multiply the mass of one particle by 15:

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

Now, let's calculate this multiplication:

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

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

Let me know if you'd like further clarification!

Here are 5 related questions to explore:
1. What would be the total mass of 20 particles with the same mass?
2. How would the total mass change if each particle had a mass of \( 0.35 \times 10^{-25} \) grams?
3. How do you multiply numbers in scientific notation?
4. What is the mass of 1 particle in kilograms, given that \( 1 \, g = 10^{-3} \, kg \)?
5. If the number of particles doubled, how would that affect the total mass?

**Tip:** When working with scientific notation, remember to treat the powers of 10 separately from the numerical part during multiplication or division.

The mass of a particle is 0.26 × 10^−25 g. Find the total mass, in g, of 15 particles.

Learn how to calculate the total mass of 15 particles, each with a mass of 0.26 × 10^−25 g. The solution involves multiplication and the application of scientific notation. Suitable for students in Grades 8-10.

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