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@Florisalreadytaken
Density = mass / volume To calculate the density of the solid sample you need to calculate the mass and the volume the mass before the block was added was 68.4 grams and then after the block was added, the scale shows 86.8 grams so the mass of the block is going to be 86.8 - 68.4 similarly, to find the volume look at the graduated cylinder the water level initially at 23 mL but after adding the block, it becomes 36 mL so what is the change in the volume? just subtract and now that you have the mass and the volume, use the formula density = mass / volume
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