Density Quiz 1 - Wasatch
Density Quiz 1
Name ______________________________________
1. A student finds the mass of a solid object to be 45.026 grams. The student places some water in a graduated cylinder as shown in figure one. After adding the solid object the water level rises as shown in figure two. What is the density of the object?
[pic] V = _______ [pic]V =______
before adding object after adding object
Show all work!
Density of object = _____________
(Watch sig. fig.’s and don’t forget units on answer!)
2. A graduated cylinder is placed on an electronic balance, and the balance reads 78.32 g. 10.0 mL of liquid are poured into the cylinder and the balance now reads 91.78 g. What is the density of the liquid? (Show all work!) (Watch sig. fig.’s!)
3. A student wants to determine the density of titanium. The student measures the mass of a solid chunk of titanium, but when he drops it into the water to determine the volume, some water splashes out of the cylinder. Will this cause the calculated density to be higher or lower than it should be? Explain!
4. A student places four small pieces of sulfur on an electronic balance and finds they have a combined mass of 23.76 grams. The student then fills a graduated cylinder with water to 60.0 mL. The four pieces of sulfur are then added to the cylinder and the volume now reads 70.0 mL. Calculate the density of the sulfur. (Show all work!) (Watch sig. fig.’s!)
5. A student wants to find the density of a solid piece of silicon. The student first places the piece of silicon on a balance and records its mass. After finding the mass the student accidentally drops the piece of silicon and a few small pieces break off and are lost. The student then finds the volume of the silicon by water displacement in a graduated cylinder. Will the calculated density be higher or lower than it should be? Explain!
6. Suppose you had a 100 gram mass and a 50 gram mass. Both masses appear to be made of the same material, but you can’t be sure. You lower the 50 gram mass into a cylinder of water and the water goes from 30.3 mL up to 36.3 mL. The 100-gram mass is also placed in a cylinder of water and the water rises from 30.3 mL to 42.3 mL. Does the experiment provide evidence that the two masses could be made of the same material? Explain!
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