4 and 6 39 4./The student places 30.0 grams of sample (d 3.0 g/cm) into a cylind

Question

4 and 6

39 4./The student places 30.0 grams of sample (d 3.0 g/cm) into a cylinder containing water and reads a volume of 50.0 cm3. What is the initial volume of water in the cylinder? h of the following experimental conditions will change the value of the calculated density? Circle one. Particle size of the object Temperature Atmospheric pressure A liquid in the graduated cylinder with lower density than water A liquid in the graduated cylinder with higher density than water 6. The figure below represents the mass versus volume graphs of four different samples vestigated by the student. Which of the following statements is correct? 70.00 mass in grams Sample 1 60.00 50.00 40.00 30.00 20.00 10.00 0.00 Sample 2 Sample 3 Sample 4 0.0 5.0 10.0 15.0 20.0 25.0 Volume in cm A. Sample 1 has the lowest density B. Sample 4 has the highest density C. Sample 4 has a density closest to that of the water D. Sample 1 has a density lower than 1.0 g/cm3 E. The density of Sample 2 is double that of the Sample 3

Explanation / Answer

4)
1st find the volume of sample
density = 3.0 g/cm^3
mass = 30.0 g
use:
volume = mass / density
= 30.0 g / 3.0 g/cm^3
= 10 cm^3

now use:
final reading = initial reading + volume
50.0 cm^3 = initial reading + 10 cm^3
initial reading = 40.0 cm^3

Answer: 40.0 cm^3

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