Science is Hayley's favorite class! She especially loves doing experiments. Today, she began an experiment with 260 grams of an unknown solid. During the experiment, the change in the mass of the solid was 
–
84 grams.
What is the final mass of the solid?

To determine the final mass of the solid, we need to account for the change in mass during the experiment. The initial mass of the solid is 260 grams, and the change in mass is a decrease of 84 grams (indicated by the negative sign).

We can calculate the final mass by subtracting the change in mass from the initial mass:

\[
\text{Final mass} = \text{Initial mass} - \text{Change in mass}
\]

Given:
\[
\text{Initial mass} = 260 \text{ grams}
\]
\[
\text{Change in mass} = -84 \text{ grams}
\]

\[
\text{Final mass} = 260 \text{ grams} - (-84 \text{ grams}) = 260 \text{ grams} + 84 \text{ grams} = 344 \text{ grams}
\]

Thus, the final mass of the solid is \(344 \text{ grams}\).

Would you like more details or have any questions?

Here are 5 numbered questions for you to ask next:

1. How do you handle negative numbers in subtraction problems?
2. Can you explain the concept of conservation of mass in chemistry experiments?
3. How do you convert grams to kilograms?
4. What are some common laboratory equipment used to measure mass?
5. How do you determine the accuracy of mass measurements in experiments?

**Tip:** When dealing with changes in mass or other quantities, always pay attention to the signs (positive or negative) to ensure accurate calculations.

Learn how to calculate the final mass of a solid after an experiment. The problem involves determining the change in mass and applying subtraction to find the final result. Suitable for students in Grades 3-5.

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